datasheet for T2117 by Atmel
Features
•
•
•
•
•
•
•
•
Direct Supply from the Mains
Current Consumption ≤0.5 mA
Very Few External Components
Full-wave Drive – No DC Current Component in the Load Circuit
Negative Output Current Pulse Typically 100 mA – Short-circuit Protected
Simple Power Control
Ramp Generator
Reference Voltage
Applications
• Full-wave Power Control
• Temperature Regulation
• Power Blinking Switch
1. Description
Zero-voltage
Switch with
Adjustable
Ramp
T2117
The integrated circuit, T2117, is designed as a zero-voltage switch in bipolar technology. It is used to control resistive loads at mains by a triac in zero-crossing mode. A
ramp generator allows power control function by period group control, whereas
full-wave logic guarantees that full mains cycles are used for load switching.
Rev. 4768B–INDCO–10/05
Figure 1-1.
Block Diagram with Typical Circuit, Period Group Control 0 to 100%
L
D1
R2
220 kΩ
(250 V~)
18 kΩ/
2W
R1
(Rsync)
Load
1000 W
-VS
C2
R4
2
8
C1
5
100 kΩ
2.2 µF/
10 V
1
7
Ramp
generator
Supply
Synchronization
GND
R5
12 kΩ
max
3
4
+
+
-
6
Pulse
amplifier
Comparator
Reference voltage
1.4 V
R6
VM = 230 V~
MT2
100 Ω
Full-wave logic
100 kΩ
min
100 µF/
16 V
MT1
R3
T2117
18 kΩ
N
2. Pin Configuration
Figure 2-1.
Pinning DIP8/SO8
RAMP
1
CRAMP
2
8
VSYNC
7
GND
T2117
Table 2-1.
2
POSIN
3
6
OUTPUT
NEGIN
4
5
VS
Pin Description
Pin
Symbol
Function
1
RAMP
2
CRAMP
Ramp capacitor
3
POSIN
Non-inverting comparator input
4
NEGIN
Inverting comparator input
5
VS
6
OUTPUT
7
GND
8
VSYNC
Ramp output
Supply voltage
Trigger pulse output
Ground
Voltage synchronization
T2117
4768B–INDCO–10/05
T2117
3. General Description
The integrated circuit T2117 is a triac controller for zero-crossing mode. It is designed to control
power in switching resistive loads of mains supplies.
Information regarding synchronous supply is provided at pin 8 via resistor RSync. To avoid a DC
load on the mains, the full-wave logic guarantees that complete mains cycles are used for load
switching.
A fire pulse is released when the inverting input of the comparator is negative (pin 4) with
respect to the non-inverting input (pin 3) and internal reference voltage. A ramp generator with
freely selectable duration can be performed by capacitor C2 at pin 2. The ramp function is used
for open-loop control (Figure 3-2), but also for applications with proportional band regulation
(Figure 10-3 on page 10). Ramp voltage available at capacitor C2 is decoupled across the emitter follower at pin 1. To maintain the lamp flicker specification, the ramp duration is adjusted
according to the controlling load. One can use internal reference voltage for simple applications.
In that case, pin 3 is inactive and connected to pin 7 (GND), see Figure 10-5 on page 12.
Figure 3-1.
Pin 1 Internal Network
T2117
Ramp
control
1
R4
2
C2
-VS
Figure 3-2.
Threshold Voltage of the Ramp at VS = -8.8 V
t
V1
Final voltage
Vmin
-1.6 V
-7.6 V
T
Initial voltage
Vmax
3
4768B–INDCO–10/05
4. Triac Firing Current (Pulse)
This depends on the triac requirement. It can be limited by the gate series resistance which is
calculated as follows:
7.5 V – V Gmax
R Gmax ≈ ----------------------------------- – 36 Ω
I Gmax
I Gmax
I P = -------------- × t p
T
where:
VG
= Gate voltage
IGmax = Maximum gate current
Ip
= Average gate current
tp
= Firing pulse width
T
= Mains period duration
5. Firing Pulse Width tp
This depends on the latching current of the triac and its load current. The firing pulse width is
determined by the zero-crossing detection which can be influenced by the synchronous resistance, Rsync, (see Figure 5-2 on page 5).
IL × VM
2
t p = --- arc. sin ⎛ -------------------⎞
⎝ P 2 ⎠
ω
where
IL
= Latching current of the triac
VM
= Mains supply, effective
P
= Load power
The total current consumption is influenced by the firing pulse width which can be calculated as
follows:
R sync
4
tp
V M 2 sin ⎛ ω × ----⎞ – 0.6 V
⎝
2⎠
= ------------------------------------------------------------------ – 49 kΩ
-5
3.5 × 10 A
T2117
4768B–INDCO–10/05
T2117
Figure 5-1.
Output Pulse Width
10.00
tp (ms)
VMains = 230 V ~
1.00
0.10
IL (mA)
200
100
50
0.01
10
Figure 5-2.
100
P (W)
1000
10000
Synchronization Resistance
2000
VMains = 230 V ~
Rsync (kΩ)
1600
1200
800
400
0
0
200
400
600
800
1000
1200
1400
tp (µs)
5
4768B–INDCO–10/05
6. Supply Voltage
The T2117 contains a voltage limiting funtion and can be connected with the mains supply via
the diode D1 and the resistor R1. The supply voltage between pin 5 and 7 is limited to a typical
value of 9.5 V.
The series resistance R1 can be calculated as follows (Figure 6-1 on page 6 and Figure 6-2 on
page 7):
2
V Mmin – V Smax
( VM – VS )
R 1max = 0.85 ------------------------------------- ; P (R1) = ---------------------------2 I tot
2 R1
Itot
= IS + IP + Ix
where
VM
= Mains voltage
VS
= Limiting voltage of the IC
Itot
= Total current consumption
IS
= Current requirement of the IC (without load)
Ix
= Current requirement of other peripheral components
P(R1) = Power dissipation at R1
Figure 6-1.
Maximum Resistance of R1
50
VMains = 230 V~
R1 (kΩ)
40
30
20
10
0
0
6
3
6
9
Itot (mA)
12
15
T2117
4768B–INDCO–10/05
T2117
Figure 6-2.
Power Dissipation of R1 According to Current Consumption
6
VMains = 230 V ~
5
PR1 (W)
4
3
2
1
0
0
3
6
9
12
15
Itot (mA)
7. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Pin
Symbol
Value
Unit
Supply current
5
-IS
30
mA
Synchrounous current
8
Isync
5
mA
1
IO
3
mA
1, 3, 4, 6
2
8
-VI
-VI
±VI
≤VS
2 to VS
≤7.3
V
V
V
Ptot
Ptot
400
125
mW
mW
Tj
125
°C
Operating ambient
temperature range
Tamb
0 to 100
°C
Storage temperature range
Tstg
-40 to +125
°C
Symbol
Value
Unit
Junction ambient SO8
RthJA
200
K/W
Junction ambient DIP8
RthJA
110
K/W
Output current ramp generator
Input voltages
Power dissipation
Tamb = 45° C
Tamb = 100° C
Junction temperature
8. Thermal Resistance
Parameters
7
4768B–INDCO–10/05
9. Electrical Characteristics
-VS = 8.8 V, Tamb = 25° C, reference point pin 7, unless otherwise specified
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Supply-voltage
limitation
-IS = 1 mA
-IS = 10 mA
5
-VS
-VS
9.0
9.1
9.5
9.6
10.0
10.1
V
V
5
-IS
500
µA
8
±VI
7.7
8.7
V
Synchronization
current
8
±Isync
0.12
Zero detector
8
±Isync
35
µA
260
460
µs
µs
Supply current
Voltage limitation
I8 = ±1 mA
8.2
mA
Output pulse width
VM= 230 V ~
Rsync = 220 kΩ
Rsync = 470 kΩ
6
6
tP
tP
Output pulse current
V6 = 0 V
6
-IO
3, 4
±VI0
15
mV
4
IIB
1
µA
3, 4
-VIC
(VS - 1)
V
4
-VRef
1.4
V
1
T
1.5
s
Final voltage
1
-V1
1.2
1.6
2.0
V
Initial voltage
1
-V1
7.2
7.6
8.0
V
2
-I2
14
20
26
µA
100
mA
Comparator
Input offset voltage
Input bias current
Common-mode input
voltage
Threshold internal
reference
V3 = 0 V
1
Ramp Generator, Figure 1-1 on page 2
-IS = 1 mA
Isync = 1 mA
C1 = 100 µF
C2 = 2.2 µF
R4 = 100 kΩ
Period
Charge current
8
V2 = -VS, I8 = -1 mA
T2117
4768B–INDCO–10/05
T2117
10. Applications
Figure 10-1. Power Blinking Switch with f ≈ 2.7 Hz, Duty Cycle 1:1, Power Range 0.5 to 2.2 kW
L
0.5 ...
2.2 kW
270 kΩ
100 nF/
250 V ~
VM = 230 V ~
N
18 kΩ/
1.5 W
56 Ω
82 Ω
8
7
6
5
T2117
1
150 kΩ
47 µF/ 16V
2
3
4
110 kΩ
0.47 µF/
10 V
9
4768B–INDCO–10/05
Figure 10-2. Power Switch
L
RL
Load
270 kΩ
VM = 230 V ~
18 kΩ
56 Ω
N
1.5 W
VDR
+5 V
8
6
7
5
T2117
1
2
3
4
47 µF/
10 V
56 kΩ
II ≥ 1.5 mA
39 kΩ
VI
Figure 10-3. Temperature Control 15° C to 35° C with Sensor Monitoring
2.2 µF/
10 V
R8
R4
470 kΩ
1
NTC
B value = 3988
R(25)
R6
100 kΩ
100 kΩ
R2
(250 V~)
(Rsync)
Ramp
generator
8
R7
220 kΩ
5
Load
1000 W
C1
VM = 230 V~
7
Synchronization
3
+
+
-
Supply
6
100 Ω
Full-wave logic
Comparator
150 Ω
Rp
18 kΩ/
2W
R1
R5(1)
4
R9
220 kΩ
2
100 kΩ
L
D1
C2
Reference voltage
1.4 V
Pulse
amplifier
R3
T2117
130 kΩ
N
R(25) = 100 kΩ/B = 3988 --> R(15) = 159 kΩ, R(35) = 64.5 kΩ, R5(1) determines the proportional range.
10
T2117
4768B–INDCO–10/05
T2117
Figure 10-4. Room Temperature Control with Definite Reduction (Remote Control) for a Temperature Range of 5 to 30°C
-∆T
L
Load
R1
0.35 ...
1.5 kW
R4
510 kΩ
680 kΩ
R5
VM = 230 V ~
680 kΩ
R2
R3
IH = 50 mA
13 kΩ/2 W
62 Ω
N
8
7
6
R16
5
220 kΩ
R6
T2117
9.1 kΩ
R7
1
R10
2
3
12 kΩ
4
R15
C3
910 kΩ
R9
25 kΩ
10 nF
C1
NTC
12 kΩ
C5
100 µF/ C4
12 V
47 µF
2.2 µF
33 kΩ
R8
56 kΩ
C2
1 µF
11
4768B–INDCO–10/05
Figure 10-5. Two-point Temperature Control for a Temperature Range of 15° C to 30° C
L
220 kΩ
Load/1000 W
VM = 230 V ~
18 kΩ/
1.5 W
VDR
56 Ω
N
8
7
6
5
220 kΩ
(680 kΩ)
T2117
1
2
3
4
10 nF
68 µF/
10 V
12
500 kΩ
(2 MΩ)
50 kΩ
(200 kΩ)
NTC
T2117
4768B–INDCO–10/05
T2117
Figure 10-6. Two-point Temperature Control for a Temperature of 18° C to 32° C and a Hysteresis of ±0.5° C at 25° C
L
D1
Rsync
Load/400 Ω
430 kΩ
VM = 230 V~
R1
18 kΩ/
1.5 W
92 Ω
N
R3
8
6
7
5
NTC
200 kΩ
T2117
D2
1
2
3
4
R6
R15
50 kΩ
27 kΩ
330 kΩ
R4
39 kΩ
R5
R7
C2
8.2 kΩ
C3
33 µF/
10 V
150 nF
C1
≥ 68 µF/
10 V
11. Ordering Information
Extended Type Number
Package
Remarks
T2117-3ASY
DIP8
Tube, Pb-free
T2117-TASY
SO8
Tube, Pb-free
T2117-TAQY
SO8
Taped and reeled, Pb-free
13
4768B–INDCO–10/05
12. Package Information
P a c k a g e D IP 8
D im e n s io n s in m m
7 .7 7
7 .4 7
9 .8
9 .5
1 .6 4
1 .4 4
4 .8 m a x
6 .4 m a x
0 .5 m in
0 .5 8
0 .4 8
3 .3
0 .3 6 m a x
9 .8
8 .2
2 .5 4
7 .6 2
8
5
te c h n ic a l d ra w in g s
a c c o rd in g to D IN
s p e c ific a tio n s
1
4
Package SO8
Dimensions in mm
5.2
4.8
5.00
4.85
3.7
1.4
0.25
0.10
0.4
1.27
6.15
5.85
3.81
8
0.2
3.8
5
technical drawings
according to DIN
specifications
1
14
4
T2117
4768B–INDCO–10/05
T2117
13. Revision History
Please note that the following page numbers referred to in this section refer to the specific revision
mentioned, not to this document.
Revision No.
History
4768B-INDCO-08/05
• Put datasheet in a new template
• First page: Pb-free logo added
• Page 13: Ordering Information changed
15
4768B–INDCO–10/05
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