UM10879 - NXP Semiconductors

UM10879 - NXP Semiconductors
UM10879
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Rev. 1 — 26 May 2015
User manual
Document information
Info
Content
Keywords
SSL8516BDB1317, LED driver, constant voltage, constant current,
isolated, demo board, Power Factor Corrector (PFC), flyback,
synchronous rectification, TEA1892ATS
Abstract
The SSL8516BDB1317 is a global mains 75 W CVCC LED driver demo
board featuring the NXP Semiconductors GreenChip SSL8516BT
PFC + flyback controller IC with burst mode.
The board has a two-stage (PFC + flyback) topology. This topology
ensures good Total Harmonic Distortion (THD) performance (mains
current class C compliance) over a wide mains input voltage range and
output power range.
The SSL8516BDB1317 can drive a large LED current control mode range.
UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Revision history
Rev
Date
Description
v.1
20150526
first issue
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
1. Introduction
WARNING
Lethal voltage and fire ignition hazard
The non-insulated high voltages that are present when operating this product, constitute a
risk of electric shock, personal injury, death and/or ignition of fire.
This product is intended for evaluation purposes only. It shall be operated in a designated test
area by personnel qualified according to local requirements and labor laws to work with
non-insulated mains voltages and high-voltage circuits. This product shall never be operated
unattended.
The SSL8516BDB1317 demo board is a constant voltage and constant current CVCC
LED driver example using a PFC and a flyback stage. This manual describes the
specification and use of the SSL8516BDB1317 board.
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Fig 1.
SSL8516BDB1317 demo board block diagram
1.1 Features and benefits
•
•
•
•
•
•
•
UM10879
User manual
Efficient and low-cost PFC and Quasi-Resonant (QR) flyback topology
Large input voltage range
Short start-up time
Low mains current harmonics
Low no-load input power
Flyback stage with large output voltage range
Single layer Printed-Circuit Board (PCB) 146  61 mm
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
2. Safety warning
The SSL8516BDB1317 demo board must be connected to mains voltage. Avoid touching
the demo board while it is connected to the mains voltage. An isolated housing is
obligatory when used in uncontrolled, non-laboratory environments. Galvanic isolation of
the mains phase using a variable transformer is always recommended. Figure 2 shows
the symbols that identify the isolated and non-isolated devices.
019aab174
019aab173
a. Isolated
Fig 2.
UM10879
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b. Not isolated
Isolation symbols
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
3. Specifications
Table 1.
SSL8516BDB1317 demo board specifications
Symbol
Description
Value
Vmains
mains voltage (AC)
90 V to 300 V (AC)
tstartup
start-up time
< 350 ms
Po(max)
maximum output
power
75 W
Rload = 32 ; at tstartup;
precondition:
VCC < 2.0 V
Vo(max)
maximum output
voltage
48.5 V
Constant Voltage (CV)
mode
Vo
output voltage range
24 V to 48 V
Current Controlled
(CC) mode
Vo(noload)
no-load output voltage
48.5 V
no-load
Io(max)
maximum output
current
1.6 A
CC mode
Io/Vmains
line regulation
<3%
Io/Vo
load regulation
<3%

efficiency
> 90 %
full load
PF
power factor
> 0.95
full load
< 20 %
quarter load
THD
total harmonic
distortion
< 10 %
full load
Pi(noload)
no-load input power
< 0.5 W
no-load; PFC auto-off
< 1.0
Pi(pd)
UM10879
User manual
Condition
power-down input
power
W[1]
no-load; PFC forced on
mW[2]
forced standby
< 100
[1]
Not default, PFCTIMER is shorted to GND to force PFC always on.
[2]
Not default, VINSENSE is shorted to GND for this measurement.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
4. Board photographs
a. Top
b. Bottom
Fig 3.
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SSL8516BDB1317 demo board photographs
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
5. Connecting the board
Connect the mains voltage to the input connector X1, type IEC C6.
Connect the load to the output connector J1.
Fig 4.
SSL8516BDB1317 demo board connections
6. Functional description
The SSL8516BDB1317 LED driver demo board is a constant voltage and constant current
LED driver. This board was especially designed to drive a wide LED voltage at a fixed
output current. At low load, a low input power is achieved by the burst mode feature of the
IC.
For more information about the SSL8516BT IC, see the SSL8516BT data sheet and the
AN11486 application note.
6.1 SSL8516BT controller IC
The SSL8516BT is a very robust and reliable PFC + flyback controller IC from the NXP
Semiconductors GreenChip family. The SSL8516BT is almost identical to the SSL8516T.
However, the SSL8516BT includes a burst mode for improved no-load power. The
SSL8516T has a VCO mode down to 0 Hz for low flicker at deep dimming in current
controlled mode.
Various internal protections ensure fail-safe operation of the LED driver under all
conditions.
• Safe restart (non-latched) protections:
– Flyback overvoltage protection
– Flyback time-out
– Flyback maximum on-time
– IC supply under voltage lockout
– IC internal temperature protection
• Latched protection:
– External LATCH pin
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
• Other protections:
– PFC overvoltage protection
– PFC overcurrent protection
– Flyback overpower protection (triggering flyback time-out timer)
6.1.1 Pinning
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Fig 5.
UM10879
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SSL8516BT pinning diagram
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.2 Dual stage LED driver
The board consists of a PFC boost stage to meet the class C lighting requirements and a
flyback stage to drive the output.
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Large signal path of the board
6.3 ElectroMagnetic Interference (EMI) filter
The EMI filter consists of the following magnetic components:
• Common-mode inductor L1
• Differential mode inductor L2
The EMI filter includes the following capacitors:
• The differential filter: C4, C2, C3 and C6
• The common-mode filter: C10
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.4 Power Factor Correction (PFC)
The PFC is a boost stage consisting of components T1, Q1, D2, and C5. In normal
operation, the PFC stage operates in Boundary Conduction Mode (BCM) with valley
switching and fixed on-time. Valley switching is described in the SSL8516BT data sheet.
The design choices for the PFC stage are based on the following targets:
• A wide mains input voltage range from 90 V (AC) to 305 V (AC)
• A large output power range must comply with the mains current harmonics class C
requirements for lighting equipment of IEC 61000-3-2
The PFC inductance T1 is maximized (lowest PFC switching frequency) for a large
frequency range. The maximum PFC frequency of the SSL8516BT is limited to 400 kHz.
The controller keeps the PFC frequency under 400 kHz through valley skipping. The
operating mode of the PFC changes from BCM to Discontinuous Conduction Mode (DCM)
in case of valley skipping.
The PFC frequency range of up to 400 kHz prevents discrete steps in the mains current
which can be the result of valley skipping.
The PFC inductance on this board is 500 H. A larger value can cause audible noise at a
300 V high mains voltage and full load. fsw(PFC) drops significantly when the peak of the
mains voltage is close to the bus voltage. In this condition, toff(PFC) increases.
The PFC output voltage Vbus is dimensioned for the use of a 450 V rated bus capacitor
(C5). Vbus(nom) = 431 V, the ripple is 10 V. For 75 W, a 22 F capacitor is sufficient when
there are no hold-up time (mains voltage cycle skipping) requirements.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
C1 = VPFCDRIVER
C2 = Imains
C3 = Vmains
C4 = Vbus
F1 = fsw(C1) = fsw(PFC)
F2 = ton(C1) = ton(PFC)
Fig 7.
PFC signals 230 V; Vo = 48 V; Io = 1.6 A
Channel F1 shows the frequency of the PFC gate drive signal VPFCDRIVER. During the zero
crossing of Vmains, the valley skipping of the PFC controller is visible. Channel F2 shows
the on-time (ton(PFC)) of the PFC gate drive signal VPFCDRIVER. The THD in Figure 7 is
9.9 %.
The PFC on-time, ton(PFC), is modulated to increase near the zero crossings of Vmains. The
on-time increase improves the THD and class C performance significantly.
The modulation signal is added to the PFC compensation network on pin PFCCOMP
using capacitor C15. The voltage (VPFCCOMP) on the PFCCOMP pin represents the
on-time. Low voltage is high ton(PFC), high voltage is low ton(PFC).
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
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Fig 8.
ton(PFC) modulation with capacitor C15
At low load, fsw(PFC) increases and the frequency limit of the PFC controller is reached. At
the mains angle where fsw(PFC)max is reached, the valley skipping is active. A discrete step
in the mains current is present. The valley hopping and the flat line during the Vmains zero
crossings determine the THD and class C performance.
Upper grid: C1 = VPFCDRIVER; C2 = lmains; C4 = Vbus
Fig 9.
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User manual
PFC signals 230 V; Vo = 16 V; Io = 1.6 A
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.5 Flyback converter
Depending on the output power/FBCTRL pin voltage, the flyback converter operates in
multiple modes:
•
•
•
•
Quasi-Resonant (QR)
Discontinuous Conduction Mode (DCM)
Frequency Reduction (FR)
Burst Mode (BM)
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(1) QR: The flyback is operated in Quasi-Resonant (QR) mode at Po(max).
(2) DCM: The IC clamps the flyback switching frequency to fsw(fb)max = 130 kHz.
(3) FRM: the FBCTRL pin controls the VCO, allowing fsw(fb) to drop to 25 kHz.
(4) BM: at fsw(fb) = 25 kHz, BM is activated to allow higher efficiency, especially for no-load and low
load conditions.
Fig 10. Multimode flyback operation
At low load, the PFC is switched off. Vbus is then charged until the peak of the mains
voltage is reached. The switch-off delay of the flyback power switch variation must be
considered to benefit from the accurate PFC switch-on and switch-off levels.
Because of the delay compensation circuit at the FBSENSE pin, the fsw(fb) is almost
independent of Vbus for this board. Resistors R12, R17, and R20 set the compensation
current.
Resistor R33 sets the amount of correction. See the AN11486 application note for more
information on the delay compensation on the FBSENSE pin and flyback adjustment
Ipk(fb)min and Ipk(fb)max.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.6 Burst mode
When the flyback switching frequency drops to below 25 kHz (in FR mode not in QR
mode), the IC enters BM. To reduce the IC current consumption, most internal IC circuits
are switched off in BM. In BM, fsw(fb) = 35 kHz with a 225 mV FBSENSE level.
(1) C1 = Vo (AC coupled)
(2) C2 = VFBDRIVER
(3) C3 = VFBCTRL
Fig 11. Burst mode signals Vo = 48.5 V; Io = 0 mA
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
(1) C1 = Vo (AC coupled)
(2) C2 = VFBDRIVER
(3) C3 = VFBCTRL
Fig 12. Burst mode signals Vo = 48.5 V; Io = 10 mA
(1) C1 = Vo (AC coupled)
(2) C2 = VFBDRIVER
(3) C3 = VFBCTRL
Fig 13. Burst mode signals Vo = 48.5 V; Io = 50 mA
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.7 IC low-voltage supply circuit
An additional auxiliary winding on the FB transformer provides the VCC supply for the IC.
In Constant Voltage (CV) mode, Vo is fixed to 48.5 V. However, in Constant Current (CC)
mode, Vo depends on the number of LEDs connected. To limit the supply voltage to the
IC, a voltage regulator circuit is used. Because Vo is regulated to 48.5 V by the CV control
loop, the auxiliary winding voltage is at its maximum in CV mode.
Due to the regulator voltage drop, the no-load input power Pi(noload) is not the lowest
possible value. For a better Pi(noload) performance, check suggestions on the VCC as
described in the AN11486 application note.
To achieve a short stat-up time at initial start-up, the HV pin current source charges VCC
buffer capacitors C26 and C42 to Vstartup = 22.3 V with 5 mA = Ich(high).
(1) C1 = Io
(2) C2 = Vo
(3) C3 = VCC
(4) C4 = Vmains
VCC was discharged to 0 V before start-up.
Fig 14. Start-up waveforms; Vmains = 230 V (AC)/50 Hz; VCC discharged to 0 V; Vo = 44 V
Table 2.
Start-up times (ms)
Vmains
UM10879
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Vload = 48 V
Vload = 24 V
Rload = 32 
Rload = 128 
100 V (AC)/60 Hz
288
287
287
289
120 V (AC)/60 Hz
288
263
277
278
230 V (AC)/50 Hz
295
276
285
291
277 V (AC)/60 Hz
274
254
266
274
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.8 Flyback feedback control loop
This LED driver example incorporates two output regulation loops:
• A Constant Voltage (CV) regulation loop
• A Constant Current (CC) regulation loop
In normal operation, one of the two loops is active/closed. The set points of the output
terminal are Vo(max) or Io(max).
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Fig 15. CV and CC control loops and SR circuit
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.9 Synchronous rectification
The synchronous rectifier control IC TEA1892ATS eliminates the secondary side heat
sink. However, to provide cooling options for experiments with output diodes, the
secondary heat sink is still mounted/available.
6.10 Output Constant Voltage (CV) control
The LED driver is intended to be connected with an LED module. The CV mode is
intended for LED modules that include a DC-to-DC converter with optional PWM dimming,
tunable white, or RGB color modules
The voltage control limits the output voltage when a load < 1.6 A is connected or when the
LED module is broken (open-string). When the voltage control loop is closed (CV mode),
the CC loop is open. In CV mode, the output is Vo is regulated at Vo(max) = 48.5 V.
6.11 Output Constant Current (CC) control
The constant current regulation set point is derived from the accurate 13 V local supply
(band gap referenced with U7). The set point is fixed to 81 mV.
Resistors R74, R75, and R76 set the accurate 9 mV lower limit.
The 13 V local supply draws current from Vo. The bias current is minimized to reduce
losses by using a low current shunt regulator TLVH431 and a high gain optocoupler. Q5
dissipation is minimal for the specified Vo range.
6.12 Output short circuit conditions
Several features provide protection against component damage when the LED driver
output is shorted.
Two conditions must be considered:
• Short circuit at start-up
• Short circuit during operation
The SSL8516BT protection features involved during output short circuit are:
• IC supply under voltage protection, pin VCC threshold Vth(UVLO)
• flyback time-out via optocoupler feedback; pin FBCTRL
• flyback OverCurrent Protection (OCP) via pin FBSENSE
With a low ohmic output short circuit, the SSL8516BT time-out is triggered before
Vth(UVLO) is reached.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.12.1 Output short circuit at start-up
C1 = Vbus
C2 = VFBCTRL
C3 = VVCC
C4 = VFBDRIVER
Fig 16. Oscillogram output short circuit at initial start-up
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
6.12.2 Output short circuit during operation
During operation, the total output capacitance is charged. Diode D13 (parallel to the LED
current sense resistor) limits the voltage and the power and so protects the sense resistor
and error amplifier.
C1 = Vbus
C2 = VFBCTRL
C3 = VVCC
C4 = VFBDRIVER
Fig 17. Oscillogram output short circuit during operation at full load
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
7. Performance
7.1 Line regulation and load regulation
Figure 18 shows the Constant Voltage (CV) regulation performance of the driver.
DDD
(1) Rload = 32 
(2) Rload = 64 
(3) Rload = 96 
(4) Rload = 128 
Fig 18. Output voltage variations for various load resistances and mains voltages
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Figure 19 shows the Constant Current (CC) regulation performance of the driver with a
voltage load with Rd = 10 .
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(1) VLED = 24 V (DC)
(2) VLED = 48 V (DC)
Fig 19. Output current variations for various constant voltage loads and mains voltages
7.2 Mains input measurements
When the supply is in CV mode, the mains input measurements are performed with an
electronic load type 63115A in resistive mode.
Table 3.
Output settings in CV mode
Output
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
load ()
32
64
96
128
When the supply is in CC mode, the mains input measurements are performed with an
electronic load type 63115A in LED mode with Rd = 10 .
Table 4.
Output settings in CC mode
Output
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
load (V)
48.0
24.0
-
-
7.2.1 Efficiency
Table 5.
Efficiency
Vmains
UM10879
User manual
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
100 V (AC)/60 Hz
Mode
CV
91.001
89.44
87.275
84.9
120 V (AC)/60 Hz
CV
91.69
89.742
87.388
84.896
230 V (AC)/50 Hz
CV
92.878
89.995
87.119
84.284
277 V (AC)/60 Hz
CV
93.004
89.85
86.763
83.808
100 V (AC)/60 Hz
CC
91.031
90.399
-
-
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UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Table 5.
Efficiency …continued
Vmains
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
120 V (AC)/60 Hz
Mode
CC
91.77
90.763
-
-
230 V (AC)/50 Hz
CC
93.015
91.131
-
-
277 V (AC)/60 Hz
CC
93.136
90.962
-
-
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
0.99471
0.98931
0.97823
0.96737
7.2.2 Power factor
Table 6.
Power factor
Vmains
Mode
100 V (AC)/60 Hz
CV
120 V (AC)/60 Hz
CV
0.9933
0.98427
0.9708
0.95398
230 V (AC)/50 Hz
CV
0.97924
0.9493
0.91732
0.87379
277 V (AC)/60 Hz
CV
0.96365
0.90012
0.81958
0.74154
100 V (AC)/60 Hz
CC
0.99516
0.99019
-
-
120 V (AC)/60 Hz
CC
0.99345
0.98517
-
-
230 V (AC)/50 Hz
CC
0.98008
0.95016
-
-
277 V (AC)/60 Hz
CC
0.96578
0.90177
-
-
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
7.2.3 Total harmonic distortion
Table 7.
Total harmonic distortion
Vmains
Mode
100 V (AC)/60 Hz
CV
6.659
5.615
6.577
9.472
120 V (AC)/60 Hz
CV
6.769
6.464
8.707
10.368
230 V (AC)/50 Hz
CV
9.451
11.999
17.934
18.826
277 V (AC)/60 Hz
CV
8.514
13.75
14.903
17.681
100 V (AC)/60 Hz
CC
6.34
5.741
-
-
120 V (AC)/60 Hz
CC
6.902
6.53
-
-
230 V (AC)/50 Hz
CC
9.62
11.67
-
-
277 V (AC)/60 Hz
CC
8.345
14.544
-
-
7.2.4 Mains current harmonics
To indicate IEC 61000-3-2 class C compliance at 230 V (AC), the mains current
harmonics are measured for several power levels.
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Mains current harmonics
Rload
PF
32
0.97924
100
64
0.9493
100
96
0.91732
100
128
0.87379
limit
NXP Semiconductors
UM10879
User manual
Table 8.
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
0
6.1
5.4
3.5
2.1
1.6
1
0.3
0.4
0.6
0.5
0.4
0.2
0.5
0.7
0.6
0.4
0.2
0.2
0.3
0.3
3.9
8.8
5
2.6
2.2
0.5
1.7
1.3
0.4
1.3
1.7
1.2
0
0.8
0.8
0.8
0.3
0.2
0.4
0.4
12.2
7.5
9.1
4.5
1.1
1.8
1.2
2.3
0.7
2.5
1.5
1
0.9
2.1
1.1
0.2
0.2
1
0.7
100
0.4
11.8
7.1
10
1.1
2
2.9
2.6
1.8
3.2
2.6
1.9
1.8
1.5
1.7
0.7
0.9
0.8
0.9
1.2
0
2
26.2
9
7
5
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
/LPLW
3R 3R 3R 3R (1) Red: IEC limit
(2) Green: Po = 100 %
(3) Purple: Po = 50 %
(5) Orange: Po = 25 %
Fig 20. Mains current harmonics (%) of fundamental; 230 V (AC)/50 Hz
DDD
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Rev. 1 — 26 May 2015
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UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
The results comply with the limits as described in IEC 61000-3-2 for class C equipment.
Table 9.
IEC 61000-3-2 class C limits of harmonic current as percentage of fundamental
Harmonic order n
Limit
2
2%
3
30 %  PF
5
10 %
7
7%
9
5%
11  n  39 (odd harmonic only)
3%
7.2.5 No-load input power Pi(noload); fault mode
The no-load input power Pi(noload) is measured with nothing connected to the output
connectors J1. Vo regulates to Vo(max) by the CV control loop.
Table 10.
Pi(noload) measurement; PFC auto-off (default)
Vmains
Pi(noload) (W)
Imains (mA)
100 V (AC)/60 Hz
0.271
49
120 V (AC)/60 Hz
0.277
49
230 V (AC)/50 Hz
0.330
48
277 V (AC)/60 Hz
0.360
54
Optional, the SSL8516BT PFC can be forced on. During this measurement only, resistor
R39 = 1  is placed to force PFC always on.
Table 11.
Pi(noload) measurement; PFC forced on (optional)
Vmains
Pi(noload) (W)
Imains (mA)
100 V (AC)/60 Hz
0.984
50
120 V (AC)/60 Hz
0.908
51
230 V (AC)/50 Hz
0.451
48
277 V (AC)/60 Hz
0.453
54
7.2.6 Power-down input power (Pi(pd))
Some LED drivers have a standby power supply and a microcontroller that
enables/disables the main power supply. When using the SSL8516BT as controller of the
main power supply, a microcontroller can pull down pin VINSENSE using a transistor.
The power-down input power (Pi(pd)) is measured with the VINSENSE pin pulled down
with a switch.
Table 12.
Pi(pd) measurement
Vmains
UM10879
User manual
Pi(pd) (W)
Imains (mA)
100 V (AC)/60 Hz
0.013
65
120 V (AC)/60 Hz
0.019
64
230 V (AC)/50 Hz
0.061
56
277 V (AC)/60 Hz
0.088
53
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UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
7.3 EMI measurements
Fig 21. Conducted prescan: 120 V (AC); FCC15; peak and average
Fig 22. Conducted prescan: 230 V (AC); EN55015; peak and average
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NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Fig 23. Conducted prescan: 277 V (AC); FCC15; peak and average
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NXP Semiconductors
UM10879
User manual
8. Schematic
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Fig 24. SSL8516BDB1317 demo board schematic: Mains input and PFC stage
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DDD
UM10879
28 of 43
© NXP Semiconductors N.V. 2015. All rights reserved.
5
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Fig 25. SSL8516BDB1317 demo board schematic: Flyback stage and output circuit
UM10879
29 of 43
© NXP Semiconductors N.V. 2015. All rights reserved.
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Rev. 1 — 26 May 2015
All information provided in this document is subject to legal disclaimers.
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UM10879
User manual
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NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
9. Bill Of Materials (BOM)
Table 13.
SSL8516BDB1317 demo board bill of materials
Reference
Description and values
Part number
BR1
bridge rectifier; 600 V; 8 A
GBU806
C1
capacitor; not mounted; 100 pF; 10 %; VY2101K29Y5SG63V7
300 V; Y5S; THT
Vishay
C2; C4
capacitor; 220 nF; 20 %; 310 V; MKP;
THT
BFC233922224
Vishay
C3
capacitor; 100 nF; 5 %; 630 V; PP;
THT
ECW-FA2J104J
Panasonic
C5
capacitor; 22 F; 20 %; 450 V; ALU;
16 mm  20 mm
EEU-EE2W220S
Panasonic
C6
capacitor; 220 nF; 5 %; 630 V; CH3;
THT
ECWFA2J224J
Panasonic
C7
capacitor; 470 nF; 10 %; 100 V; X7R;
0805
08051C474KAT2A
AVX
C8
capacitor; 1 nF; 10 %; 400 V; MMK;
THT
MMK5102K400J01L16.5TR18
KEMET
C9
capacitor; not mounted; 47 F; 20 %;
63 V; ALU; THT
EEU-FR1J470
Panasonic
C10
capacitor; 2.2 nF; 20 %; 300 V; VY2;
THT
VY2222M35Y5US6TV7
Vishay
C11
capacitor; 470 F; 20 %; 50 V; ALU;
THT
50ZLH470MEFC12.5X20
Rubycon
C12; C23
capacitor; not mounted; 47 pF; 5 %;
630 V; C0G; 1206
GRM31A5C2J470JW01D
Murata
C13
capacitor; 33 nF; 10 %; 50 V; X7R;
0603
-
-
C14; C21
capacitor; 220 pF; 5 %; 50 V; C0G;
0603
-
-
C15
capacitor; 1.2 nF; 5 %; 630 V; C0G;
1206
CGA5F4C0G2J122J085AA
TDK
C16
capacitor; 3.3 F; 10 %; 25 V; X7R;
0805
CGA4J1X7R1E335K125AC
TDK
C17; C32; C37;
C38
capacitor; 1 nF; 10 %; 50 V; C0G;
0603
-
-
C18
capacitor; 68 nF; 10 %; 50 V; X7R;
0603
-
-
C19
capacitor; 1 F; 10 %; 16 V; X7R;
0603
-
-
C20; C25
capacitor; 100 pF; 10 %; 50 V; X7R;
0603
-
-
C22; C24; C46
capacitor; 100 nF; 10 %; 50 V; X7R;
0603
-
-
C26; C36
capacitor; 470 nF; 10 %; 50 V; X7R;
0603
-
-
UM10879
User manual
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Rev. 1 — 26 May 2015
Manufacturer
Diode Inc.
© NXP Semiconductors N.V. 2015. All rights reserved.
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UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Table 13.
SSL8516BDB1317 demo board bill of materials …continued
Reference
Description and values
Part number
Manufacturer
C27
capacitor; not mounted; 220 pF; 5 %;
50 V; C0G; 0603
-
-
C28
capacitor; 330 nF; 10 %; 16 V; X7R;
0603
-
-
C29
capacitor; not mounted; 100 nF; 10 %; 50 V; X7R; 0603
-
C30; C40; C41
capacitor; 100 nF; 10 %; 100 V; X7R;
0603
GRM188R72A104KA35D
Murata
C31
capacitor; 4.7 F; 10 %; 25 V; X7R;
0805
TMK212AB7475KG-T
Taiyo Yuden
C33
capacitor; 10 nF; 10 %; 50 V; X7R;
0603
-
-
C34; C35
capacitor; not mounted; 100 pF; 10 %;
50 V; X7R; 0603
C42
capacitor; 47 F; 20 %; 35 V; ALU;
5 mm  11 mm
35ZLJ47MTA5X11
Rubycon
C43
capacitor; 1 F; 10 %; 63 V; PET;
B32529
B32529C105K189
EPCOS
C45
capacitor; 470 pF; 5 %; 250 V; C0G;
0603
C1608C0G2E471J080AA
TDK
D1; D2
diode; 600 V; 5 A
BYV25X-600,127
NXP Semiconductors
D4; D6; D17
diode; 100 V; 200 mA
BAS316,135
NXP Semiconductors
D3; D13
diode; 700 V; 1 A
1N4007GP-E3-54
Vishay
D5; D7
diode; dual; not mounted; 200 V;
125 mA
BAV23S,215
NXP Semiconductors
D8
diode; TVS; 250 V; 1 A; 400 W; SMD
SMAJ250CA
Littelfuse
D9
diode; zener; 27 V; 250 mA
NZH27C,115
NXP Semiconductors
D10
diode; 300 V; 200 mA
BAS101
NXP Semiconductors
D11
diode; zener; not mounted; 10 V;
250 mA
NZH10C,115
NXP Semiconductors
D12
diode; dual; 90 V; 215 mA
BAW56,235
NXP Semiconductors
D15
diode; zener; 12 V; 250 mA
BZX384-C12
NXP Semiconductors
D16
diode; dual; 200 V; 125 mA
BAV23S,215
NXP Semiconductors
F1
fuse; 2.5 A; slow
SS-5H-2.5A-APH
Cooper Bussmann
HS1
heat sink primary
-
-
HS2
heat sink secondary
-
-
J1
connector; 5.08 mm
1508060000
Weidmüller
L1
inductor; common-mode; 20 mH; 1.5 A 744823220
Würth Elektronik
L2
inductor; 700 H; 2 A
Würth Elektronik
750312186
L3
inductor; common-mode; 47 H; 2 A
744841247
Würth Elektronik
Q1
transistor MOSFET-N; 600 V; 6.8 A
FCPF7N60NT
Fairchild
Q2
transistor MOSFET-N; 800 V; 6 A
SPA06N80C3
Infineon
Q3
transistor MOSFET-N; 200 V; 39 A
PSMN057-200P,127
NXP Semiconductors
Q4; Q5
transistor; BJT; NPN; 80 V; 1 A
BCP56-16,115
NXP Semiconductors
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UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Table 13.
SSL8516BDB1317 demo board bill of materials …continued
Reference
Description and values
Part number
Manufacturer
Q6
transistor MOSFET-N; 240 V; 100 mA
BSS131H6327XT
Infineon
R1
varistor; 320 V; 170 pF
V320LA10P
Littelfuse
R2
resistor; NTC; 330 k; 5 %; THT
NTCLE100E3334JB0
Vishay
R3
resistor; 470 k; 5 %; 2 W; PR02; THT PR02000204703JR500
Vishay
R4; R5
resistor; 1.5 M; 2 %; 250 mW; 1206
HV732BTTD155G
KOA Speer
R6; R7
resistor 0.27 ; 1 %; 500 mW; 1206
RCWE1206R270FKEA
Vishay
R8; R40; R41;
R48; R57; R61
resistor; 10 ; 1 %; 100 mW; 0603
-
-
R9
resistor; 130 k; 1 %; 250 mW; 1206
-
-
R10; R16; R19;
R23; R26; R35;
R38; R78; R83
resistor; 0 ; 1 %; 250 mW; 1206
-
-
R11
resistor; 8.2 k; 1 %; 250 mW; 1206
-
-
R12; R17; R20
resistor; 3.9 M; 1 %; 250 mW; 1206
-
-
R13
resistor; 22 k; 1 %; 100 mW; 0603
-
-
R14
resistor; 300 k; 1 %; 250 mW; 1206
-
-
R15; R18; R21
resistor; 3.3 M; 1 %; 250 mW; 1206
-
-
R22; R50
resistor; 39 k; 1 %; 100 mW; 0603
-
-
R24
resistor; 15 k; 1 %; 100 mW; 0603
-
-
R25; R60; R72
resistor; 51 k; 1 %; 100 mW; 0603
-
-
R28; R30
resistor; 56 k; 1 %; 100 mW; 0603
-
-
R29
resistor; 5.6 k; 1 %; 63 mW; 0603
-
-
R31; R32
resistor; 0.75 ; 1 %; 250 mW; 1206
-
-
R33; R36; R64;
R66
resistor; 1 k; 1 %; 100 mW; 0603
-
-
R34
resistor; 2.2 k; 1 %; 100 mW; 0603
-
-
R37
resistor; 2.2 ; 1 %; 63 mW; 0603
-
-
R39; R45
resistor; not mounted; 1 ; 1 %;
63 mW; 0603
-
-
R42
resistor; 5.1 k; 1 %; 250 mW; 1206
-
-
R43
resistor; 10 k; 1 %; 100 mW; 0603
-
-
R44
resistor; 5.6 k; 1 %; 250 mW; 1206
-
-
R46
resistor; 180 k; 1 %; 63 mW; 0603
-
-
R47
resistor; 10 k; 1 %; 250 mW; 1206
-
-
R49
resistor; not mounted; 220 ; 1 %;
63 mW; 0603
-
-
R51
resistor; 1.8 k; 1 %; 250 mW; 1206
-
-
R52; R53
resistor; not mounted; 1.5 k; 1 %;
250 mW; 1206
-
-
R54
resistor; not mounted; 10 k; 1 %;
100 mW; 0603
-
-
R55; R58
resistor; 22 ; 1 %; 100 mW; 0603
-
-
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Table 13.
SSL8516BDB1317 demo board bill of materials …continued
Reference
Description and values
Part number
Manufacturer
R56
resistor; not mounted; 1 k; 1 %;
100 mW; 0603
-
-
R59
resistor; 60.4 k; 1 %; 100 mW; 0603
-
-
R62
resistor; 4.7 ; 1 %; 63 mW; 0603
-
-
R63
resistor; 47 k; 1 %; 250 mW; 1206
-
-
R65
resistor; 5.1 k; 1 %; 100 mW; 0603
-
-
R67
resistor; 0 ; 1 %; 63 mW; 0603
-
-
R68
resistor; 100 k; 1 %; 100 mW; 0603
-
-
R69
resistor; 50 m; 1 %; 1 W; 2512
RL2512FK-070R05L
Yageo
R70
resistor; 6.2 k; 1 %; 63 mW; 0603
-
-
R71
resistor; 59 k; 1 %; 100 mW; 0603
-
-
R73; R74
resistor; 10 k; 1 %; 100 mW; 0603
-
-
R75
resistor; 560 k; 1 %; 63 mW; 0603
-
-
R76
resistor; 1 M; 1 %; 63 mW; 0603
-
-
R82
resistor; 1.1 ; 1 %; 250 mW; 1206
-
-
T1
transformer; PFC; 500 H; 3.5 A;
RM10
750313715R01
Würth Elektronik
T3
transformer; flyback; 1.2 mH; N = 4;
PQ2620
750314464R2
Würth Elektronik
U1
optocoupler; NPN; 70 V; 50 mA
SFH615A-4
Vishay
U2
optocoupler; NPN; not mounted; 70 V; SFH615A-4
50 mA
Vishay
U3
PFC and flyback controller
SSL8516BT
NXP Semiconductors
U4
operational amplifier; single; not
mounted
TS321AILT
ST
U5
synchronous rectifier
TEA1892ATS
NXP Semiconductors
U6
operational amplifier; dual
LM2904AVQDRQ1
Texas Instruments
U7
voltage regulator; 1.24 V; 1 %; 80 mA
TLVH431AQDBZR
Texas Instruments
X1
connector; mains
771W-BX2-01
Qualtek
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User manual
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
10. PCB layout
The PCB of the SSL8516DB1195 demo board is reused for the SSL8516BDB1317 demo
board. The PCB board information:
• Single layer
• Component numbering is starting at the mains connector
• Secondary heat sink HS2 is not required but mounted for experiments
DDD
a. Top side
b. Bottom side
Fig 26. SSL8516BDB1317 demo board component placement
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User manual
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
DDD
Fig 27. SSL8516BDB1317 demo board: bottom side copper and silk screen
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
11. Transformer information
11.1 PFC transformer
Wurth Electronics Midcom Inc.; part number 750313715
DDD
a. Bottom view
DDD
b. Top view
DDD
c. Winding pinout
Fig 28. PFC transformer
Table 14.
Symbol
Parameter
Value
Condition
Lp
inductance
500 H
pins 7 to 9
Isat
saturation current
3.5 A
N
turns ratio
17.33
13.00
(9-7):(3-10)
Llk
leakage inductance
40 H
tie 1 + 3 + 10 + 12
V
dielectric rating
1000 V (AC)
pins 1 to 7
1000 V (AC)
pins 3 to 7
Rdc
UM10879
User manual
PFC transformer electrical specifications
DC resistance
2000 V (AC)
pin 7 to core
260 m
pins 7 to 9
100 m
pins 3 to 10
200 m
pins 1 to 12
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 26 May 2015
(9-7):(12-1)
© NXP Semiconductors N.V. 2015. All rights reserved.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
11.2 Flyback transformer
Wurth Electronics Midcom Inc.; part number 750314464
DDD
DDD
a. Bottom view
b. Top view
DDD
c. Winding pinout
Fig 29. Flyback transformer
Table 15.
PFC transformer electrical specifications
Symbol
Parameter
Value
Condition
Lp
inductance
1.23 mH
pins 6 to 4
Isat
saturation current
1.9 A
N
turns ratio
1
(6-5):(5-4)
4
(6-4):(3-1)
4
(6-4):(10-9)
18.66
(6-4):(1-2)
Llk
leakage inductance
5 H
tie 1 + 2 + 3, 9 + 10
V
dielectric rating
4000 V (AC)
pins 2 to 10 (tie 3 + 4)
2000 V (AC)
pins 1 to core
(tie 3 + 4 + 9)
625 V (AC)
pins 3 to 4
525 m
pins 6 to 4
143 m
pins 3 to 1
69 m
pins 10 to 9
75 m
pins 1 to 2
Rdc
DC resistance
The bobbin is not conforming safety standards. To meet the required safety standards,
use flying leads or an extended bobbin.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
11.3 Winding turns and wire information
Core material: PQ2620 3C96
Table 16.
Winding turns and wire information
Turns
Wire
N0,0
26
3  0.16 mm
N0,1
26
3  0.16 mm
N1
13
3  0.16 mm
N2
13
2  TIW 0.35 mm
N3
3
1  0.16 mm
[WDSH
SLQ
[WDSH
SLQ
[WDSH
SLQ
SLQ
1
[WDSH
SLQ
1
SLQ
[WDSH
SLQ
1
[WDSH
1
SLQ
[WDSH
SLQ
1
SLQ
DDD
Fig 30. Flyback transformer winding build
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User manual
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
12. Appendix: Mains current harmonics (MHR) improvement
The MHR can be improved over the full load range at the expense of the THD at full load.
With the modifications shown in Figure 31, the THD at 230 V (AC) is < 15 % instead of
< 10 %. The following modifications are required:
• PFCDRIVER injection 100 k and 4.7 nF
• Speeding up Rmains capacitors: 2  150 pF
%5
&
&
3)&$8;
5
&
5
3)&&203
9,16(16(
5
&
)%&75/
+9
Nȍ
Q)
5
)%'5,9(5
5
926(16(
S)
3)&6(16(
5
3)&'5,9(5
S)
)%6(16(
)%$8;
,&
*1'
9&&
/$7&+
3)&7,0(5
DDD
Fig 31. Simplified circuit diagram with MHR improvement modifications
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xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Rload
Mains current harmonics
PF
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
32
0.97841
100
0
13.7
4.1
2.4
1.8
1.4
0.9
0.1
0.5
0.7
0.5
0.1
0.5
0.7
0.6
0.5
0.1
0.2
0.4
0.4
64
0.95479
100
0.2
13.3
6.9
2.9
1.9
1.6
0.7
1.2
1.2
0.9
1
2.1
0.5
1
1.4
1.1
0.2
0.7
0.6
0.4
96
0.92344
100
0.4
13.5
8.3
4.9
1.9
1.9
2
1.4
2.2
2.5
1.6
1.3
0.4
1.3
0.8
0.9
0.4
0.4
1
0.7
128
0.88626
100
0.7
14.2
6.8
6.7
1.3
0.9
1.4
1.6
1.1
0.8
1
0.4
0.6
2.1
0.2
0.4
0.6
0.2
0.9
0.6
0
2
26.6
9
7
5
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
/LPLW
3R limit
NXP Semiconductors
UM10879
User manual
Table 17.
3R 3R 3R (1) Red: IEC limit
(2) Green: Po = 100 %
(3) Purple: Po = 50 %
(5) Orange: Po = 25 %
Fig 32. Mains current harmonics in % of fundamental; with MHR improvement
DDD
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(4) Blue: Po = 33 %
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Rev. 1 — 26 May 2015
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UM10879
NXP Semiconductors
SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
Table 18.
Total harmonic distortion; with MHR improvement
Vmains
Mode
Po = 100 %
Po = 50 %
Po = 33 %
Po = 25 %
100 V (AC)/60 Hz
CV
10.599
11.738
11.709
7.729
120 V (AC)/60 Hz
CV
11.326
12.132
12.017
10.976
230 V (AC)/50 Hz
CV
14.686
16.033
17.634
17.998
277 V (AC)/60 Hz
CV
11.675
15.063
19.13
21.646
13. Abbreviations
Table 19.
Abbreviations
Acronym
Description
AC
Alternating Current
BCM
Boundary Conduction Mode
CC
Constant Current
CV
Constant Voltage
DC
Direct Current
DCM
Discontinuous Conduction Mode
EMI
ElectroMagnetic Interference
FR
Frequency Reduction
HV
High-Voltage
IC
Integrated Circuit
IEC
International Technical Commission
LED
Light-Emitting Diode
OCP
OverCurrent Protection
OPP
OverPower Protection
OVP
OverVoltage Protection
PCB
Printed-Circuit Board
PFC
Power Factor Control
PP
PolyPropylene
QR
Quasi-Resonant
SR
Synchronous Rectification
THD
Total Harmonic Distortion
THT
Through Hole Technology
14. References
UM10879
User manual
[1]
SSL8516BT data sheet — GreenChip PFC and flyback controller
[2]
SSL8516T data sheet — GreenChip PFC and flyback controller
[3]
AN11486 application note — GreenChip SSL8516T PFC and flyback controller
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
15. Legal information
15.1 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
15.2 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer’s own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
Evaluation products — This product is provided on an “as is” and “with all
faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates
and their suppliers expressly disclaim all warranties, whether express, implied
or statutory, including but not limited to the implied warranties of
non-infringement, merchantability and fitness for a particular purpose. The
entire risk as to the quality, or arising out of the use or performance, of this
product remains with customer.
In no event shall NXP Semiconductors, its affiliates or their suppliers be liable
to customer for any special, indirect, consequential, punitive or incidental
damages (including without limitation damages for loss of business, business
interruption, loss of use, loss of data or information, and the like) arising out
the use of or inability to use the product, whether or not based on tort
(including negligence), strict liability, breach of contract, breach of warranty or
any other theory, even if advised of the possibility of such damages.
Notwithstanding any damages that customer might incur for any reason
whatsoever (including without limitation, all damages referenced above and
all direct or general damages), the entire liability of NXP Semiconductors, its
affiliates and their suppliers and customer’s exclusive remedy for all of the
foregoing shall be limited to actual damages incurred by customer based on
reasonable reliance up to the greater of the amount actually paid by customer
for the product or five dollars (US$5.00). The foregoing limitations, exclusions
and disclaimers shall apply to the maximum extent permitted by applicable
law, even if any remedy fails of its essential purpose.
Safety of high-voltage evaluation products — The non-insulated high
voltages that are present when operating this product, constitute a risk of
electric shock, personal injury, death and/or ignition of fire. This product is
intended for evaluation purposes only. It shall be operated in a designated
test area by personnel that is qualified according to local requirements and
labor laws to work with non-insulated mains voltages and high-voltage
circuits.
The product does not comply with IEC 60950 based national or regional
safety standards. NXP Semiconductors does not accept any liability for
damages incurred due to inappropriate use of this product or related to
non-insulated high voltages. Any use of this product is at customer’s own risk
and liability. The customer shall fully indemnify and hold harmless NXP
Semiconductors from any liability, damages and claims resulting from the use
of the product.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
15.3 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
GreenChip — is a trademark of NXP Semiconductors N.V.
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SSL8516BDB1317 75 W 48 V/1.6 A CVCC LED driver
16. Contents
1
1.1
2
3
4
5
6
6.1
6.1.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.12.1
6.12.2
7
7.1
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.3
8
9
10
11
11.1
11.2
11.3
12
13
14
15
15.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features and benefits . . . . . . . . . . . . . . . . . . . . 3
Safety warning . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Board photographs . . . . . . . . . . . . . . . . . . . . . . 6
Connecting the board . . . . . . . . . . . . . . . . . . . . 7
Functional description . . . . . . . . . . . . . . . . . . . 7
SSL8516BT controller IC . . . . . . . . . . . . . . . . . 7
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Dual stage LED driver. . . . . . . . . . . . . . . . . . . . 9
ElectroMagnetic Interference (EMI) filter . . . . . 9
Power Factor Correction (PFC) . . . . . . . . . . . 10
Flyback converter . . . . . . . . . . . . . . . . . . . . . . 13
Burst mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
IC low-voltage supply circuit . . . . . . . . . . . . . . 16
Flyback feedback control loop . . . . . . . . . . . . 17
Synchronous rectification . . . . . . . . . . . . . . . . 18
Output Constant Voltage (CV) control . . . . . . 18
Output Constant Current (CC) control . . . . . . 18
Output short circuit conditions . . . . . . . . . . . . 18
Output short circuit at start-up . . . . . . . . . . . . 19
Output short circuit during operation . . . . . . . 20
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Line regulation and load regulation . . . . . . . . 21
Mains input measurements. . . . . . . . . . . . . . . 22
Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power factor . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Total harmonic distortion. . . . . . . . . . . . . . . . . 23
Mains current harmonics . . . . . . . . . . . . . . . . 23
No-load input power Pi(noload); fault mode. . . . 25
Power-down input power (Pi(pd)) . . . . . . . . . . . 25
EMI measurements. . . . . . . . . . . . . . . . . . . . . 26
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Bill Of Materials (BOM) . . . . . . . . . . . . . . . . . . 30
PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Transformer information . . . . . . . . . . . . . . . . . 36
PFC transformer . . . . . . . . . . . . . . . . . . . . . . . 36
Flyback transformer . . . . . . . . . . . . . . . . . . . . 37
Winding turns and wire information . . . . . . . . 38
Appendix: Mains current harmonics (MHR)
improvement . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 41
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Legal information. . . . . . . . . . . . . . . . . . . . . . . 42
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
15.2
15.3
16
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP Semiconductors N.V. 2015.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 26 May 2015
Document identifier: UM10879
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