LT3756
LT3756
LT3756-1
LT3756-2
PRODUCTION
100VIN, 100VOUT LED Controller
- Part Models
- 44
- 1ku List Price
- Starting From $4.87
Viewing:
Overview
- 3000:1 True Color PWM™ Dimming
- Wide Input Voltage Range: 6V to 100V
- Output Voltage Up to 100V
- Constant-Current and Constant-Voltage Regulation
- 100mV High Side Current Sense
- Drives LEDs in Boost, Buck Mode, Buck-Boost Mode, SEPIC or Flyback Topology
- Adjustable Frequency: 100kHz to 1MHz
- Open LED Protection
- Programmable Undervoltage Lockout with Hysteresis
- Improved Open LED Status Pin (LT3756-2)
- Frequency Synchronization (LT3756-1)
- PWM Disconnect Switch Driver
- CTRL Pin Provides Analog Dimming
- Low Shutdown Current: <1µA
- Programmable Soft-Start
- Thermally Enhanced 16-Lead QFN (3mm × 3mm) and MSOP Packages
- AEC-Q100 Qualified for Automotive Applications
The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.
The LT3756/LT3756-1/LT3756-2 sense output current at the high side of the LED string. High side current sensing is the most flexible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode configuration. The PWM input provides LED dimming ratios of up to 3000:1, and the CTRL input provides additional analog dimming capability.
Applications
- High Power LED Applications
- Current Limited Constant Voltage Applications
- Battery Charging
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 4
Video 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 17, 2025 - 25_0119 Bond Wire Change from Gold to Copper (Automotive) |
||
| LT3756EMSE#PBF | PRODUCTION | |
| LT3756EMSE#TRPBF | PRODUCTION | |
| LT3756EMSE#WPBF | PRODUCTION | |
| LT3756EMSE#WTRPBF | PRODUCTION | |
| LT3756EMSE-1#PBF | PRODUCTION | |
| LT3756EMSE-1#TRPBF | PRODUCTION | |
| LT3756EMSE-1#WPBF | PRODUCTION | |
| LT3756EMSE-1#WTRPBF | PRODUCTION | |
| LT3756EMSE-2#PBF | PRODUCTION | |
| LT3756EMSE-2#TRPBF | PRODUCTION | |
| LT3756EMSE-2#WPBF | PRODUCTION | |
| LT3756EMSE-2#WTRPBF | PRODUCTION | |
| LT3756HMSE-2#PBF | PRODUCTION | |
| LT3756HMSE-2#TRPBF | PRODUCTION | |
| LT3756HMSE-2#WPBF | PRODUCTION | |
| LT3756HMSE-2#WTRPBF | PRODUCTION | |
| LT3756IMSE#PBF | PRODUCTION | |
| LT3756IMSE#TRPBF | PRODUCTION | |
| LT3756IMSE#WPBF | PRODUCTION | |
| LT3756IMSE#WTRPBF | PRODUCTION | |
| LT3756IMSE-1#PBF | PRODUCTION | |
| LT3756IMSE-1#TRPBF | PRODUCTION | |
| LT3756IMSE-1#WPBF | PRODUCTION | |
| LT3756IMSE-1#WTRPBF | PRODUCTION | |
| LT3756IMSE-2#WPBF | PRODUCTION | |
| LT3756IMSE-2#WTRPBF | PRODUCTION | |
| LT3756JMSE-2#PBF | PRODUCTION | |
| LT3756JMSE-2#TRPBF | PRODUCTION | |
| LT3756JMSE-2#WPBF | PRODUCTION | |
| LT3756JMSE-2#WTRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LT3756EMSE#PBF | PRODUCTION | |
| LT3756EMSE#TRPBF | PRODUCTION | |
| LT3756EMSE-1#PBF | PRODUCTION | |
| LT3756EMSE-1#TRPBF | PRODUCTION | |
| LT3756EMSE-2#PBF | PRODUCTION | |
| LT3756EMSE-2#TRPBF | PRODUCTION | |
| LT3756HMSE-2#PBF | PRODUCTION | |
| LT3756HMSE-2#TRPBF | PRODUCTION | |
| LT3756IMSE#PBF | PRODUCTION | |
| LT3756IMSE#TRPBF | PRODUCTION | |
| LT3756IMSE-1#PBF | PRODUCTION | |
| LT3756IMSE-1#TRPBF | PRODUCTION | |
| LT3756IMSE-2#PBF | PRODUCTION | |
| LT3756IMSE-2#TRPBF | PRODUCTION | |
| LT3756JMSE-2#PBF | PRODUCTION | |
| LT3756JMSE-2#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT3756EMSE#PBF | PRODUCTION | |
| LT3756EMSE#TRPBF | PRODUCTION | |
| LT3756EMSE#WPBF | PRODUCTION | |
| LT3756EMSE#WTRPBF | PRODUCTION | |
| LT3756EMSE-1#PBF | PRODUCTION | |
| LT3756EMSE-1#TRPBF | PRODUCTION | |
| LT3756EMSE-1#WPBF | PRODUCTION | |
| LT3756EMSE-1#WTRPBF | PRODUCTION | |
| LT3756EMSE-2#PBF | PRODUCTION | |
| LT3756EMSE-2#TRPBF | PRODUCTION | |
| LT3756EMSE-2#WPBF | PRODUCTION | |
| LT3756EMSE-2#WTRPBF | PRODUCTION | |
| LT3756HMSE-2#PBF | PRODUCTION | |
| LT3756HMSE-2#TRPBF | PRODUCTION | |
| LT3756HMSE-2#WPBF | PRODUCTION | |
| LT3756HMSE-2#WTRPBF | PRODUCTION | |
| LT3756IMSE#PBF | PRODUCTION | |
| LT3756IMSE#TRPBF | PRODUCTION | |
| LT3756IMSE#WPBF | PRODUCTION | |
| LT3756IMSE#WTRPBF | PRODUCTION | |
| LT3756IMSE-1#PBF | PRODUCTION | |
| LT3756IMSE-1#TRPBF | PRODUCTION | |
| LT3756IMSE-1#WPBF | PRODUCTION | |
| LT3756IMSE-1#WTRPBF | PRODUCTION | |
| LT3756IMSE-2#PBF | PRODUCTION | |
| LT3756IMSE-2#TRPBF | PRODUCTION | |
| LT3756IMSE-2#WPBF | PRODUCTION | |
| LT3756IMSE-2#WTRPBF | PRODUCTION | |
| LT3756JMSE-2#PBF | PRODUCTION | |
| LT3756JMSE-2#TRPBF | PRODUCTION | |
| LT3756JMSE-2#WPBF | PRODUCTION | |
| LT3756JMSE-2#WTRPBF | PRODUCTION | |
|
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive) |
||
| LT3756EUD#PBF | PRODUCTION | |
| LT3756EUD#TRPBF | PRODUCTION | |
| LT3756EUD-1#PBF | PRODUCTION | |
| LT3756EUD-1#TRPBF | PRODUCTION | |
| LT3756EUD-2#PBF | PRODUCTION | |
| LT3756EUD-2#TRPBF | PRODUCTION | |
| LT3756IUD#PBF | PRODUCTION | |
| LT3756IUD#TRPBF | PRODUCTION | |
| LT3756IUD-1#PBF | PRODUCTION | |
| LT3756IUD-1#TRPBF | PRODUCTION | |
| LT3756IUD-2#PBF | PRODUCTION | |
| LT3756IUD-2#TRPBF | PRODUCTION | |
|
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM] |
||
| LT3756HMSE-2#PBF | PRODUCTION | |
| LT3756HMSE-2#TRPBF | PRODUCTION | |
| LT3756HMSE-2#WPBF | PRODUCTION | |
| LT3756HMSE-2#WTRPBF | PRODUCTION | |
|
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices |
||
| LT3756HMSE-2#PBF | PRODUCTION | |
| LT3756HMSE-2#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Digital to Analog Converters (DACs) 1 | ||
| LTC2627 | PRODUCTION | 12-Bit Dual Rail-to-Rail with I²C Interface |
| Hot Swap Controllers 1 | ||
| LTC4364 | RECOMMENDED FOR NEW DESIGNS | Surge Stopper with Ideal Diode |
| Pulse-Width Modulation (PWM) & Pulse Generators 1 | ||
| LTC6992 | TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM) | |
| Temperature Sensors 1 | ||
| LTC2991 | RECOMMENDED FOR NEW DESIGNS | Octal I2C Voltage, Current, and Temperature Monitor |
Tools & Simulations
LTspice 4
- LT3756-2 Demo Circuit - 30W White LED Automotive Headlamp Driver with Thermal Derating & Open LED Status (8-60V to 18x 3.4V LEDs @ 380mA)
- LT3756-1 Demo Circuit - 100Vin 100Vout LED Driver Controller with Sync (8-80V to 24x 3.4V LEDs @ 500mA)
- LT3756 Demo Circuit - 100Vin 100Vout LED Driver Controller (8-80V to 24x 3.4V LEDs @ 500mA)
- LT3756-2 Demo Circuit - Buck Mode 1A LED Driver with High Dimming Ratio and Open LED (24-80V to 1A/5 White LEDs)
Models for the following parts are available in LTspice:
- LT3756
- LT3756-1
- LT3756-2
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.