LT3796
LT3796
LT3796-1
PRODUCTION
100V Constant-Current and Constant-Voltage Controller with Dual Current Sense
- Part Models
- 12
- 1ku List Price
- Starting From $5.23
Viewing:
Overview
- 3000:1 True Color PWM™ Dimming
- Wide Input Voltage Range: 6V to 100V
- Current Monitoring Up to 100V
- High Side PMOS Disconnect and PWM Switch Driver
- Constant-Current and Constant-Voltage Regulation
- Dual Current Sense Amplifiers with Reporting
- C/10 Detection for Battery and SuperCap Charging
- Linear Current Sense Threshold Programming
- Short-Circuit Protection
- Adjustable Frequency: 100kHz to 1MHz
- Frequency Synchronization (LT3796)
- Independent Top Gate Enable Pin (LT3796-1)
- Programmable Open LED Protection with VMODE Flag
- Programmable Undervoltage Lockout with Hysteresis
- Soft-Start with Programmable Fault Restart Timer
- Available in 28-Lead TSSOP Package
The LT3796/LT3796-1 are DC/DC controllers designed to regulate a constant-current or constant-voltage and are ideal for driving LEDs. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Two ground referred voltage FB pins serve as the input for several LED protection features, and also allow the converter to operate as a constant-voltage source. The LT3796/LT3796-1 feature a programmable threshold output current sense amplifier with rail-to-rail common mode range. A separate high side amplifier is gain configurable with two resistors and can be used to regulate a second current or a voltage in combination with one of the FB pins. The PWM input provides LED dimming ratios of up to 3000:1.
The LT3796-1 is optimized for a second output current regulation loop that can be enabled/disabled with a PMOS switch, either to drive a second LED string or to extend analog dimming range.
Applications
- High Power LED, High Voltage LED, Dual String
- Battery and SuperCap Chargers
- Accurate Current Limited Voltage Regulators
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Product Selector Card 2
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3796EFE#PBF | 28-Lead TSSOP w/ EP | ||
| LT3796EFE#TRPBF | 28-Lead TSSOP w/ EP | ||
| LT3796EFE-1#PBF | 28-Lead TSSOP w/ EP | ||
| LT3796EFE-1#TRPBF | 28-Lead TSSOP w/ EP | ||
| LT3796HFE#PBF | 28-Lead TSSOP w/ EP | ||
| LT3796HFE#TRPBF | 28-Lead TSSOP w/ EP | ||
| LT3796HFE-1#PBF | 28-Lead TSSOP w/ EP | ||
| LT3796HFE-1#TRPBF | 28-Lead TSSOP w/ EP | ||
| LT3796IFE#PBF | 28-Lead TSSOP w/ EP | ||
| LT3796IFE#TRPBF | 28-Lead TSSOP w/ EP | ||
| LT3796IFE-1#PBF | 28-Lead TSSOP w/ EP | ||
| LT3796IFE-1#TRPBF | 28-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 9, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LT3796EFE#PBF | PRODUCTION | |
| LT3796EFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3796EFE#PBF | PRODUCTION | |
| LT3796EFE#TRPBF | PRODUCTION | |
| LT3796EFE-1#PBF | PRODUCTION | |
| LT3796EFE-1#TRPBF | PRODUCTION | |
| LT3796HFE#PBF | PRODUCTION | |
| LT3796HFE#TRPBF | PRODUCTION | |
| LT3796HFE-1#PBF | PRODUCTION | |
| LT3796HFE-1#TRPBF | PRODUCTION | |
| LT3796IFE#PBF | PRODUCTION | |
| LT3796IFE#TRPBF | PRODUCTION | |
| LT3796IFE-1#PBF | PRODUCTION | |
| LT3796IFE-1#TRPBF | PRODUCTION | |
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LT3796EFE-1#PBF | PRODUCTION | |
| LT3796EFE-1#TRPBF | PRODUCTION | |
| LT3796HFE#PBF | PRODUCTION | |
| LT3796HFE#TRPBF | PRODUCTION | |
| LT3796HFE-1#PBF | PRODUCTION | |
| LT3796HFE-1#TRPBF | PRODUCTION | |
| LT3796IFE#PBF | PRODUCTION | |
| LT3796IFE#TRPBF | PRODUCTION | |
| LT3796IFE-1#PBF | PRODUCTION | |
| LT3796IFE-1#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 |
|---|---|---|
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4359 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode Controller with Reverse Input Protection |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4366 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper |
| Pulse-Width Modulation (PWM) & Pulse Generators 1 | ||
| LTC6992 | TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM) | |
| Temperature Sensors 1 | ||
| LTC2995 | PRODUCTION | Temperature Sensor and Dual Voltage Monitor with Alert Outputs |
Tools & Simulations
LTspice 3
- LT3796-1/LTC1541 Demo Circuit - SEPIC LED Driver with 100:1 Analog Dimming (8-20V to 35V String @ 1A)
- LT3796 Demo Circuit - Boost LED Driver with Input Current Monitor (9-60V to 85V LED String @ 400mA)
- LT3796 Demo Circuit - Boost LED Driver with Output Short Circuit Protection & LED Current Monitor (9-60V to 85V LED String @ 400mA)
Models for the following parts are available in LTspice:
- LT3796
- LT3796-1
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.
Evaluation Kits
LT3796EFE Demo Board | 100V LED Controller with Current Monitor; 8V to 85VIN, up to 85VOUT @ 0.4A