HBLED Driver Selection
Graphical Selector Guide
DC/DC Buck
DC/DC Boost
AC/DC Buck
Constant Current
IS31LT3916
IS32LT3953
IS31LT3938
IS32LT3120
IS31LT3918
IS32LT3180
8-Channel, 10 to 75mA/CH
100KHz to 2MHz, 3.0A
dimmable, with protecon
<256VAC
External MosFET
Integrated PFC
Flyback Config
2-Channel, 200mA/CH
De-bounce, Fade IN/OUT
Higher Drive MosFET
Linear/PWM/Switch Dim
Over Temp/Cur/Volt Prot
dual intensity, fault report
External MosFET
Linear/PWM/Switch Dim
Over Temp/Cur/Volt Prot
VIN
IS31LT3953
IS31LT3910
Integrated MosFET (3.0A)
100kHz to 2MHz
External MosFET
Linear/PWM Dimming
Temp. Compensaon
IS31LT3350
IS31LT3932
Integrated MosFET (750mA)
Linear/PWM Dimming
<40VDC
AC/DC Flyback
IS31LT3352
Integrated MosFET (750mA)
Linear/PWM Dimming
Temp. Compensation
IS31LT3353
Integrated MOSFET(1A)
Linear/PWM Dimming
Universal Input, High PF,
Low THD, Non-Dimmable
IS31LT3933
Universal input, High PF,
Low THD, Non-Dimmable
IS31LT3935
TRIAC Dimmable, High PF,
small DFN package
IS31LT3360
IS31LT3948
External MosFET
PFM Boost, PWM dimming
OverTemp/Volt Protec
IS31LT3552
IS32BL3552
IS31LT3117
IS32BL3554
8 Channel, 10 to 75mA/CH,
dual intensity, fault report
4-Channel, 350mA/CH
5% accuracy
2 channel, 40 to 360mA/CH,
1.5% accuracy
IS32LT3170
Adjustable 10 to 150mA
IS31LT3505
5 to 35V Buck/Boost, Analog
or PWM Dimming
IS31LT3171
IS32LT3171
IS31LT3170
IS32LT3172
Adjustable 10 to 150mA,
PWM dimming input
Adjustable 10 to 150mA
IS31LT3380
<6VDC
Adjustable 10 to 200mA
Adjustable 10 to 200mA
PWM Dimming
IS31LT3354
IS31LT3135
External MosFET
Linear/PWM Dimming
Integrated MosFET
Main/Aux Dual Channel
AC/DC Buck
DC/DC Boost
Linear Driver
Buck Converter
A “buck” or “step-down” takes a higher input voltage and converts it to a lower output voltage.
Boost Converter
A “boost” or “step-up”takes a lower input voltage and converts it to a higher output voltage.
Linear Driver
A “linear driver” generates a fixed current that varies slightly with changes in voltage.
2
Adjustable 10 to 150mA,
PWM dimming input
IS32LT3173
Integrated MosFET (1.2A)
Switch Dimming
DC/DC Buck
4-Channel, 20 to 180mA/CH
1.5% accuracy
4-Channel, Integrated
Power MOS, 100mA/CH,
0.8% accuracy
4 channel, 20 to 180mA/CH,
1.5% accuracy
Integrated MosFET (2.0A)
1Mhz Switching
OverTemp Protecon
2-Channel, 40 to 360mA/CH
1.5% accuracy
IS32BL3556
IS31LT3554
IS31LT3515
Integrated MosFET (1.2A)
Linear/PWM Dimming
IS31LT3180
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Automove
Continuous Mode Buck Converter
6 to 40VDC
DC/DC Buck
IS31LT3350 - 750mA Buck w/ Integrated Switch
IS31LT3353 - 1A Buck w/ Integrated Switch
Features
• 750mA output current with 5%
accuracy (IS31LT3350)
• 1A output current with 3% accuracy
(SI31LT3353)
• 1MHz switching frequency with 95% efficiency
• Integrated 40V power MOS switch
• Single pin ON/OFF and brightness control using
Linear or PWM
• Up to 1200 : 1 dimming ratio
• Open and short LED, thermal shutdown
protection
IS31
Applications
LT3
3
50
• MR16 LED spotlight
SOT89-5
SOT23-5
• LED Streetlamp, wall-washer, decorative lighting
• Automobile LED decorative lights
IS31LT3360- 1.2A Buck w/ Integrated Switch
Features
• Up to 1.2A output current with 3% accuracy
• 1MHz switching frequency with 98% efficiency
• Integrated 40V power MOS switch
• Single pin ON/OFF and brightness control
using Linear or PWM
• Up to 1200 : 1 dimming ratio
• Open and short LED, thermal shutdown
protection
• Temperature Ranges:
S3: -40oC to +105oC, S4: -40oC to +125oC
IS31
LT3
3
60
Applications
• MR16 LED spotlight
SOT89-5
• LED Streetlamp, wall-washer,
decorative lighting
• Automobile LED decorative lights
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
3
Continuous Mode Buck Converter
6 to 40VDC
DC/DC Buck
IS31LT3354 - Buck w/ External Switch
Features
• Up to 2A output current only limited by
external component selection
• 1MHz switching frequency with 98%
efficiency
• Up to 1200 : 1 dimming ratio
• Open and short LED, thermal shutdown
protection
• Single pin ON/OFF and brightness
control using DC voltage or PWM
Applications
• MR16 LED Spot Lighting
• LED Street Lamp
• Decorative Lighting
SOT23-5
IS31LT3352 - 750mA Buck w/
Temperature Compensation
Features
• Cascadable temperature compensation
• Integrated 40V power MOS switch
• 750mA output current with 5% accuracy
• 1MHz switching frequency with 95%
efficiency
• Up to 1200 : 1 dimming ratio
• Accepts either DC or PWM dimming input
signal
Applications
• MR16 LED Spot Lighting
• LED Street Lamp
SOP-8
4
• Decorative Lighting
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
DC/DC Buck
Continuous Mode Buck Converter
6 to 40VDC
IS31LT3953
V IN
(4.5V to 48V)
RFREQ
PWM
(100Hz to 2kHz)
IS31LT3953 - 3A Buck w/ Integrated Switch
VIN
LX
Features
TON
FB
• 4.5V to 48V input
EN
GND
• Up to 3A output current
CS
VCC
• Cycle-by-cycle current limit
• Single pin ON/OFF and brightness control
using Linear or PWM
RISET
• Robust protection against:
Adjacent pin-to-pin short
Pin-to-GND short
Component open/short faults
• Low power shutdown (1 μA typical)
SOP-8EP
IS31LT3380 - 1.2ABuck w/ Switch Dimming
Features
• 40V/1.2A output current with 5% accuracy
• 1MHz switching frequency with 98% efficiency
• Integrated 40V power switch for decreased
parts count
• Multimodes switch dimming
• Use ordinary power switch with existing wiring
and fixtures
• Open and short LED, thermal shutdown
protection
SOP-8
DIM1
DIM2
DIM LEVELS*
Floating
Floating
No Dimming
Floating
GND
100%-50%-20%
GND
Floating
100%-60%-30%
GND
GND
100%-30%
* Switch ON/OFF cycles the DIM Ratio
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
5
DC/DC Boost
IS31LT3948 - Boost w/ PFM Mode
Features
• Wide input voltage range: 5V-100V
• Constant Current Output limited only by
external component selection
• Automatically adjust boost output for
constant Load current
• No loop compensation required
• Internal over-voltage protection
• Internal over-temperature protection
• Extended temp range: -40 to 1250C
SOP-8
1A
IS31LT3505 - 1A Boost w/ Integrated Switch
Features
• 6V to 30V supply voltage
• Boost output up to 35V
• Output current up to 1A
• PWM dimming control
• 1MHz switching frequency with 90%
efficiency
• Integrated 35V power switch
• Internal soft start
• Open-circuit LED thermal shutdown
protection
MSOP-10
6
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
DC/DC Buck-Boost
IS31LT3515- Buck, Boost or Buck-boost
Topology
Features
• 5V to 35V supply voltage
• Buck, Boost or Buck-Boost operation
• External resistor sets operating frequency
up to 500Khz
• Gate clamp voltage to drive low cost
MOSFET
• Easy dimming: Analog or PWM
• Internal soft start
SOP-16
• Protections:
Over voltage
Short circuit
Under voltage
Over Temperature
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
7
AC/DC Buck-Boost
TRIAC Dimmable
IS31LT3935
IS31LT3935 - TRIAC Dimming
Features
• Smooth 0-100% flicker-free dimming range
• Compatibility with most TRIAC Dimmers
(Digital, Leading and Trailing-edge)
• Integrated near unity Power Factor
Correction Power Factor = 0.99 at 13W
output
Figure 1 Typical Application Schematic
• Low component count
• Low 500μA quiescent current with soft start
• Spread Spectrum switching for reduced EMI
• Efficiency: 87% from 120Vrms to 39VDC
DFN10-EP
eTSSOP-16
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 07/10/2014
8
1
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
AC/DC Buck
*Switch ON/OFF cycles the DIM Ratio
1A
IS31LT3918 - Switch and 3-level Dimming
Features
• Wide input range from 6VDC to 450DC or
85VAC to 265VAC
• 92% efficiency with 3% output current
accuracy
• Linear, PWM or switch dimming capability
• Use ordinary power switch with existing
wiring and fixtures
• Over current, voltage and temp protection
• Requires few external components
• Non-isolated Design
SOP-8
For both IS31LT3918 and IS31LT3938
*Switch ON/OFF cycles the DIM Ratio
IS31LT3938 - Switch and 3-level Dimming
Features
• Wide input voltage range: 10VDC~450VDC or
85Vac~ 265Vac
• High efficiency with 3% output current
accuracy
• High MOS gate drive voltage
• Linear, PWM or switch dimming
• User configurable power sequencing levels
• Over current, temperature and short circuit
protection
• Use ordinary power switch with existing
wiring and fixtures
SOP-8
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
9
AC/DC Buck-boost, Flyback
IS31LT3916 - Flyback, Buck-boost Isolated
LED Driver with Integrated PFC
Features
• Active Power Factor Correction to > 0.95
• 5% typical current accuracy up to 1A
• No loop compensation required
• Wide input voltage range: 90V to 260VAC
• Isolated and non-isolated design
• Internal over-temperature protection
• Primary side OCP
• Overvoltage Protection
MSOP-8
IS31LT3932 - True Constant Current
Features
• Universal Input Voltage: 85~265Vac
• Configurable for fly-back, buck-boost or
buck topology
• ± 5% line regulation and load regulation
• Constant LED current with ± 3% accuracy
• Integrated near unity Power Factor
Correction
• Low 15μA startup current with soft start
• MOSFET valley turn-on (Buck) and high
gate drive
SOP-8
10
• Integrated protections
- No Load and open feedback protection
- UVLO, OCP, OVP and OTP protections
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
AC/DC Buck or Isolated
Fuse
BD
D1
TR
C1
C6
D2
R10
R1
U1 3933
VIN
VCC
C2
FSET
R2
R4
D4
Q1
GATE
VSINE
R11
CS
GND
OVP
LED DRIVER
R5
C3
R3
IS31LT3933 - HIGH PF LOW THD UNIVERSAL
D3
Rcs
R9
Features
• Universal isolation and non-isolation
• Single stage PFC fly-back
• Low THD w/ no loop compensation required
R8
R6
C4
R7
• No opto-coupler required
• ±5% LED current accuracy
• ±3% line regulation
• ±3% load regulation
• Wide input voltage: 85~305VAC
• Low start-up current(15uA)
• Few external components
SOP-8
• UVLO,OCP,OVP and OTP protections
• SOP-8 package
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
11
Boost + Linear Driver
IS31LT3552 - Two Channel Boost
Features
• 2 current sinks adjustable 40 to 360mA
- String-to-string current matching of 1.5%
- High contrast ratio
- External PWM dimming
• Input voltage range: 4.5V to 33V
• Operating frequency: 100kHz to 1MHz
• Protections for: OCP, OTP, UVLO, LED open/
short, programmable OVP
eTSSOP-16
IS31LT3554 - Four Channel Boost
Features
• 4 current sinks adjustable 20 to 180mA
- String-to-string current matching of 1.5%
- High contrast ratio
- External PWM dimming
• Input voltage range: 4.5V to 33V
• Operating frequency: 100kHz to 1MHz
• Protections for: OCP, OTP, UVLO, LED open/
short, programmable OVP
eTSSOP-16
12
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Linear
IS31LT3135 - Main/Aux Dual Channel LED
Driver with Automatic Switchover
Features
• Optimized for battery powered & Mining
lamp applications
• Intelligent Battery undervoltage detect
• Sparkless Manual or Auto switch from Main to
Aux LED
• Over-temperature and short circuit protection
• Main/Aux channel current set by external
resistors
• Low IC quiescent current less than 300uA
Miner LED Lamp
SOP-8
IS31LT3117 - 4-Channel CCR
Features
• Four 350mA channels, 1.4A total output
• Current matching 3% between channels
• Thermal current regulation above 130°C
• PWM dimming and Shutdown control input
• VREF 2.5V output to drive external standoff
BJTs for high voltage/current operation
• Low IC quiescent current less than 100uA
• PWM frequency up to 100KHz
eTSSOP-16
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
13
Linear Driver
IS31LT3170- 10-to-150mA CCR
Features
• Adjustable continuous output current up to
150 mA with an external resistor on ADJ pin
• LED drive current preset to 10 mA
• Supply voltage up to 42V
• Low or high side current control
• Negative thermal coefficient of -0.2
%/K reduces output current at higher
temperatures
• SOT23-6 package
SOT23-6
IS31LT3171 - 10-to-150mA CCR with PWM
Features
• EN pin for up to 10kHz PWM
• Adjustable continuous output current up to
150 mA with an external resistor on ADJ pin
• LED drive current preset to 10 mA
• Supply voltage up to 42V
• Low or high side current control
• Negative thermal coefficient of -0.2
%/K reduces output current at higher
temperatures
• SOT23-6 package
SOT23-6
14
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Automotive Linear Driver
IS32LT3120 - Dual Channel CCR with
Fade IN/OUT
Features
• Input voltage range: 5V to 45V
• Dual output channels can source up to
200mA
• Independent ON/OFF button control for each
channel - debounced inputs
• Programmable functions with external
resistor
- Set gamma corrected fade IN/OUT speed
- Set channel current
• Protections for LED string short to GND, over
temperature
• Automotive AEC-Q100 Qualified (Pending)
SOP‐8EP
1kΩ
Q1
TAIL
RGS
1kΩ
STOP
50Ω
3
220nF
CVCC
1µF
10kΩ
2
Intensity CCR
6
5
RTAIL
7.72kΩ
Features
ERC
VCC
IS32LT3180
7
10nF
RSTOP
3.09kΩ
IS32LT3180 - Eight Channel, Dual
VSTRING
0.1µF
8
FAULT
OUT1
PWM
STOP
OUT8
TAIL
FB
GND
1
RFB1
8.87kΩ
9
4
13
RFB2
1kΩ
• 6V-50V voltage input with load dump
protection
• Eight channel CCR for automotive rear tail
light
• Output current programmable from 10mA to
75mA
• Tail duty cycle programmable from 1% to 95%
• Low dropout voltage of 0.5V for minimal
power dissipation
• Dual function /PWM input selects between DC
output and PWM
• Output over temperature current reduction
eTSSOP-16
• Automotive AEC-Q100 Qualified (Pending)
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
15
Automotive Linear Driver
IS32LT3170 - 10-to-150mA CCR
Features
• Adjustable continuous output current up to
150 mA with an external resistor on ADJ pin
• LED drive current preset to 10 mA
• Supply voltage up to 42V
• Low or high side current control
• Negative thermal coefficient of -0.2%/K
reduces output current at higher
temperatures
• SOT23-6 package
• Automotive AEC-Q100 Qualified (Pending)
SOT23-6
IS32LT3171 - 10-to-150mA CCR with PWM
Features
• EN pin for up to 10kHz PWM
• Adjustable continuous output current up
to 150 mA with an external resistor on ADJ pin
• LED drive current preset to 10 mA
• Supply voltage up to 42V
• Low or high side current control
• Negative thermal coefficient of -0.2 %/K
reduces output current at higher temperatures
• SOT23-6 package
• Automotive AEC-Q100 Qualified (Pending)
SOT23-6
16
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Automotive Linear Driver
IS32LT3172 - 10-to-200mA CCR
Features
+VS
3
EN
GND
•Low-side current3sink
5~8
Micro
Controller
-Current
GND
5~8
4
REXT
OUT
REXT
EN
preset to 10mA
• AdjustablePWM
from 10mA to 200mA with
IS32LT3173
external resistor selection
IS32LT3172
4
+VS
• Wide input voltageREXT
range from
1,2
REXT
• 5V to 42V (IS32LT3172)
OUT
1,2
• with a low dropout of 0.5V
• Protection features:
• 0.2%/K negative temperature coefficient
for thermal protection
-Open circuit and over voltage protection
• SOP-EP8 package
• RoHS compliant (Pb-free) package
SOP-8EP
• Automotive AECQ-100 qualified (pending)
IS32LT3173 - 10-to-200mA CCR with PWM
+VS
3
Micro
Controller
EN
5~8
IS32LT3173
PWM
4
GND
REXT
REXT
OUT
1,2
Features
• Low-side current sink
-Current preset to 10mA
- Adjustable from 10mA to 200mA with
external resistor selection
• Wide input voltage range from
-2.8V to 42V (IS32LT3173)
• with a low dropout of 0.5V
• Up to 10kHz PWM input
• Protection features:
-0.2%/K negative temperature
coefficient for thermal protection
-Open circuit and over voltage
protection
SOP-8EP
• SOP-EP8 package
• RoHS compliant (Pb-free) package
• Automotive AECQ-100 qualified (pending)
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
17
Automotive Boost Backlight
Driver
IS32BL3552 - Two Channel Boost
Features
• 2 current sinks adjustable 40 to 360mA
- String-to-string current matching of 1.5%
- High contrast ratio
- External PWM dimming
• Input voltage range: 4.5V to 33V
• Operating frequency: 100kHz to 1MHz
• Protections for: OCP, OTP, UVLO, LED open/
short, programmable OVP
• Automotive AEC-Q100 Qualified
eTSSOP-16
IS32BL3554 - Four Channel Boost
Features
• 4 current sinks adjustable 20 to 180mA
- String-to-string current matching of 1.5%
- High contrast ratio
- External PWM dimming
• Input voltage range: 4.5V to 33V
• Operating frequency: 100kHz to 1MHz
• Protections for: OCP, OTP, UVLO, LED open/
short, programmable OVP
• Automotive AEC-Q100 Qualified
eTSSOP-16
18
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Automotive Boost Backlight
Driver
VBattery
8V~16V
C IN
4.7 F
50V
R SC
0.033
R ADJ
249
OPTIONAL
L1
10 H
Q1
CC
22 nF
RC
20
1
2
3
VCC
100k
4
6
15
C VCC
0.1 F
RZ
120
CZ
0.47 F
SW
OVP
5
18
17,16
C OUT
4.7 F
50V
FAULTB
EN/PWM
APWM
VCC
LED1
LED2
LED3
COMP
ISET
FR/SYNC
PGND
AGND
Features
• 4 current sinks adjustable up to 100mA
VIN
LED4
CP
120p F
8
R OVP
137k
SENSE
IS32BL3556
10
Micro
Controller
GATE
IS32BL3556 - Four Channel Boost
D1
2A / 60V
-String-to-string current matching of 0.8%
-High contrast ratio
-External PWM dimming
14
13
12
11
9
8
10
R FR
10k
R SET
8.25k
• Input voltage range: 4.75V to 40V
• Integrated Power MOSFET
• Operating frequency upto 2.3MHz
-Synchronize capable
• Protections for: OCP, OTP, UVLO, LED open/
short, programmable OVP
• Provide driver for external PMOS input
disconnect switch
• Automotive AEC-Q100 Qualified (Pending)
eTSSOP-24
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
19
Automotive DC/DC Buck
IS31LT3953
V IN
(4.5V to 48V)
RFREQ
PWM
(100Hz to 2kHz)
VIN
LX
TON
FB
EN
GND
CS
VCC
IS32LT3953 - 3A Buck w/ Integrated Switch
Features
• Up to 3A output current
• Cycle-by-cycle current limit
• Single pin ON/OFF and brightness control
using Linear or PWM
RISET
• Robust protection against:
- Adjacent pin-to-pin short
- Pin-to-GND short
- Component open/short faults
• Low power shutdown (1 mA typical)
• Automotive AEC-Q100 Qualified (Pending)
SOP‐8EP
20
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Ordering Information
Product Selector Guide
Switching (AC/DC & DC/DC)
Part No.
Driver
VIN (V)
IOUT
Accuracy
Effcy
(%)
Power
Typical
Transistor Applications
IS31LT3350
DC/DC
Buck
6-40
750mA
±5%
95
Built-in
IS31LT3352
DC/DC
Buck
6-40
750mA
±5%
95
IS31LT3353
DC/DC
Buck
6-40
Iout: 1A
+/-3%
IS31LT3354
DC/DC
Buck
6-40
IS31LT3360*
DC/DC
Buck
IS31LT3380
Package
Key Feature
Status
Low voltage LED
lighting, MR16 replacement
SOT23-5,
SOT89-5
Single pin ON/OFF or brightness control with DC/PWM, thermal shutdown
Prod
Built-in
Low voltage LED
lighting, MR16 replacement
SOP-8
Cascadable, temp. compensation and
Prod
one pin ON/OFF/dimming control
95
Built-in
Low voltage LED
lighting, MR16 replacement
SOT23-5,
SOT89-5
Single pin ON/OFF or brightness control with DC/PWM, thermal shutdown
Prod
< 2.5A
±5%
98
External
Low volt. LED lightSOT23-5
ing, Illuminated sign
1200:1 dimming ratio LED driver with
thermal shutdown protection
Prod
6-40
1.2A
±3%
98
Built-in
MR16, MR11 spot
light, PAR light
SOT89-5
High efficiency with buck converter,
with analog or PWM dimming
Prod
DC/DC
Buck
8.5-40
1.2A
±5%
98
Built-in
MR16, MR11 spot
light, PAR light
SOP-8
3-level switch dimming control,
open/short and thermal shutdown
protection
Prod
IS31LT3505
DC/DC
Boost
6-30
24W
±5%
90
Built-in
Battery powered
LED, solar light
MSOP-10
1MHz Boost Converter with 30V
Internal NMOS
Prod
IS31LT3515
DC/DC
5-35
±3%
90
External
Industrial, street
lighting
SOP-16
35V Buck/Boost, Buck/Boost operation
S=Q2/15
IS31LT3948
DC/DC
Boost
5-100
-
90
External
Street lamp, LED
lighting, Gen. illum.
SOP-8
Wide input voltage range, Boost,
over-voltage/temperature protection
Prod
IS31LT3910
AC/DC
8-450
DC
110/220
AC
500mA
±7%
90
External
T8, PAR light
SOP-8
Non-isolation, linear/PWM dimming,
temperature compensation
Prod
IS31LT3916
AC/DC
90-260
AC
PF > 0.9
85
External
T8, Bulb Replacement, PAR light
MSOP-8
Isolated and Non-Isolated;
Offline LED Driver with Active PFC
Prod
IS31LT3953
DC/DC
Buck
6-48V
-
Integrated
3APWM Dimmable
Lighting
SOP-8EP
200kHz to 2Mhz DC/DC 3.0A dimmable buck regulator with robust
protection features
S=Q2/15
Switching (AC/DC & DC/DC)
Part No.
Driver
VIN (V)
IOUT
Accuracy
Effcy
(%)
Power
Transistor
Typical
Applications
IS31LT3918
DC/DC
AC/DC
6-450 DC
85-265 AC
±3%
95
External
IS31LT3932
AC/DC
85-265 AC
PF > 0.95
>85
IS31LT3933
AC/DC
85-305 AC
PF > 0.95
IS31LT3935
AC/DC
110/220
AC
PF > 0.95
IS31LT3938
DC/DC,
AC/DC
10-450 DC 85-265 AC ±3%
Package
Key Feature
Status
LED Lighting; Signal
SOP-8
& decor. lighting, T8
High voltage LED driver with
3-level Switch Dimming
Prod
External
Retrofit Bulb, Tube,
PAR Lighting
SOP-8
High Power factor, Low THD
Universal Constant Current
Prod
>85
External
Retrofit Bulb, Tube,
PAR Lighting
SOP-8
High Power factor, Low THD
Universal Constant Current
S=Q1/15
87
External
Bulb Replacement,
spot light, PAR light
DFN10
eTSSOP-16
25W Triac Dimmable Active PF
Isolated and Non-Isolated
Prod
95
External
LED Lighting; Signal
SOP-8
& decorative lighting
High voltage LED driver with
Switch Dimming, Single External FET
Prod
* -40°C to +125°C Extended Temperature range option available
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
21
Ordering Information
Product Selector Guide cont’d.
Automotive (Industrial)
Part No.
Driver
VIN (V)
IOUT
Power
Accuracy Transistor
Typical
Applications
Package
Key Feature
IS32BL3552
DC/DC
Boost
4.5 - 33V
±1.5%
External
Automotive lighting,
LCD display backlight
eTSSOP-16
Two channel LED current sinks, 40 to 360mA AECQ100
per string. String-to-string accuracy 1.5%
qualified
IS32BL3554
DC/DC
Boost
4.5 - 33V
±1.5%
External
Automotive lighting,
LCD display backlight
eTSSOP-16
Four 20 to 180mA channel current sinks. AECQ100
String-to-string accuracy 1.5%
qualified
IS32BL3556
DC/DC
Boost
4.75 - 40V
±0.8%
External
Automotive lighting,
LCD monitor backlight
eTSSOP-24
Four 100mA channel current sinks.
String-to-string accuracy 0.8%
S=Q2/15
IS32LT3953
DC/DC
Buck
6 - 48V
-
Integrated
Automotive lighting,
dimmable cabin light
SOP-8EP
200kHz to 2Mhz DC/DC 3.0A dimmable
buck regulator with robust protection
features
S=Q2/15
IS32LT3120
Linear
5 - 45V
-
Integrated
Automotive cabin lighting, map & dome light
SOP-8EP
Two channel CCR with two debounced
switch inputs, LED fade IN/OUT
Sample
IS32LT3170/1
Linear
2.8 - 42V
-
Integrated
Automotive lighting,
emergency lighting,
retail lighting
SOT23-6
Adjustable CCR 10 to 150mA, negative thermal coeff., low / high side,
IS32LT3171 PWM dimming
S=Q2/15
IS32LT3172/3
Linear
2.8 - 42V
-
Integrated
Automotive cabin lighting, map & dome light
SOP-8EP
Adjustable CCR 10 to 200mA, negative thermal coeff., low / high side,
IS32LT3173 PWM dimming
S=Q2/15
IS32LT3180
Linear
6 - 60V
±5.0%
Integrated
Automotive RCL, CHMSL,
eTSSOP-16
fog lamps, turn signal
Eight channel, dual intensity,
CCR with fault reporting, 10-75mA
Sample
IOUT
Accuracy
Power
Transistor
Typical
Applications
Package
Key Feature
Status
Miner lamp, Torch, Battery
powered LED lighting
SOP-8
Main/sub dual-channel driver with
short circuit and over temp. protection
Prod
eTSSOP-16
Four 350 mA channel current sinks.
Support for external ballast transistor
Prod
Status
Linear
Part No.
Driver
VIN (V)
IS31LT3135
Constant
2.7-5.5
Current
500mA
±5%
Built-in
IS31LT3117
Linear
6 - 53V
±5.0%
Integrated Low-side CCR
IS31LT3170/1
Linear
2.8 - 42V
-
Integrated
Emergency lighting, retail
lighting
SOT23-6
Adjustable CCR 10 to 150mA, negative thermal coeff., low / high side,
IS31LT3171 PWM dimming
S=Q2/15
IS31LT3172/3
Linear
2.8 - 42V
-
Integrated
Emergency lighting, retail
lighting
SOP-8EP
Adjustable CCR 10 to 200mA, negative thermal coeff., low / high side,
IS31LT3173 PWM dimming
S=Q2/15
Evaluation Boards * Note : Visit www.issi.com for a complete list of Evaluation Boards.
Device
Evaluation Board
Description
Device
Evaluation Board
Description
IS31LT3910_T8_EB
T8 Evaluation Board
IS31LT3135
IS31LT3135-V1GRLS2-EB
Dual Ch. - 1.17V
IS31LT3910
IS31LT3350
IS31LT3350-V1SDLS2-EB3CH
3CH
IS31LT3916
IS31LT3916_EB_T8ISO_V01A
IS31LT3916_EB_BULB_V01A
T8 Isolated
Bulb
IS31LT3354
IS31LT3354_STLS2_EBDCDC
AC Input
IS31LT3918
IS31LT3918_GRLS2_EBT8
T8
IS31LT3360
IS31LT3360-SDLS3-EBMR16
IS31LT3360-SDLS3-EBAIC
MR16
AIC
IS31LT3932
IS31LT3932-GRLS2-EBBULB
10LEDLoad
IS31LT3935
IS31LT3935-EBBULB-ISO110
A19
IS31LT3380
IS31LT3380_GRLS3_EBMR16
1.2A MR16
IS31LT3938
IS31LT3505
IS31LT3505-SLS2-EBDC
Constant Current
IS31LT3938-GRLS2-EBBULB
IS31LT3938-GRLS2-EBT8
Bulb
T8
IS31LT3948
IS31LT3948-GRLS2-EBAC
General
22
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
Ordering Information
Part Decoder
IS 31 LT 3135 V1-GR L S2
ISSI prefix
Product Family
Product Type
Part Number
• Analog Product Family
31 = Analog and Mixed Signal
32 = Automotive Analog and Mixed Signal
• Product Type
AP = Audio Power Amplifier
BL = White LED DRiver for LCD Backlight
FL = FxLED Driver
LT = Lighting LED Driver
Temp. Grade
Solder Type
Package Code
Voltage/Parameter
• Temperature Grade
S1 = Commercial (0ºC to 70ºC)
S2 = Industrial temp. (-40ºC to 85ºC)
S3 = Industrial temp. (-40ºC to 105ºC)
S4 = Industrial temp. (-40ºC to 125ºC)
A1 = Automotive Grade (-40ºC to +85ºC)
A2 = Automotive Grade (-40ºC to +105ºC)
A3 = Automotive temp. (-40 to 125ºC)
• Solder Type
Blank = Sn/Pb
L = Lead-free (RoHS Compliant)
• Package Type
C = WCSP
D = DFN
GR = SOP
QF = QFN
S = MSOP
SD = SOT89
ST = SOT23
TT = TSOT23
UT = UTQFN
Z = TSSOP
• Voltage Range / Parameters
Sense Voltage Range
V1 = 91mV to 101mV
V2 = 99mV to 110mV
Under-Voltage Range
V1 = 1.13V to 1.21V
V2 = 1.19V to 1.26V
February 2015 • 1623 Buckeye Dr. Milpitas, CA. 95035 • 408.969.6600 • analog@issi.com • www.issi.com
23
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