LT3796
LT3796-1
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LT3796
LT3796-1

100V Constant-Current and Constant-Voltage Controller with Dual Current Sense

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LTspice LT3796 Demo Circuit - Boost LED Driver with Output Short Circuit Protection & LED Current Monitor (9-60V to 85V LED String @ 400mA) Download 6.00KB LTspice LT3796 Demo Circuit - Boost LED Driver with Input Current Monitor (9-60V to 85V LED String @ 400mA) Download 5.00KB LTspice LT3796-1/LTC1541 Demo Circuit - SEPIC LED Driver with 100:1 Analog Dimming (8-20V to 35V String @ 1A) Download 8.00KB LTspice LT3796 - LED Driver IC Download 4 KB
Part Models 12
1ku List Price Starting From $4.13
Features
  • 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
Additional Details
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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
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Documentation View All Documentation
LTspice LT3796 Demo Circuit - Boost LED Driver with Output Short Circuit Protection & LED Current Monitor (9-60V to 85V LED String @ 400mA) Download 6.00KB LTspice LT3796 Demo Circuit - Boost LED Driver with Input Current Monitor (9-60V to 85V LED String @ 400mA) Download 5.00KB LTspice LT3796-1/LTC1541 Demo Circuit - SEPIC LED Driver with 100:1 Analog Dimming (8-20V to 35V String @ 1A) Download 8.00KB LTspice LT3796 - LED Driver IC Download 4 KB
Part Models 12
1ku List Price Starting From $4.13
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LT3796
LT3796-1

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UPDATED 03/03/2014
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LT3796: 100V Constant-Current and Constant-Voltage Controller with Dual Current Sense Data Sheet

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LT3796/LT3796-1: 100V Constant-Current and Constant-Voltage Controller with Dual Current Sense Data Sheet

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LT3796: デュアル電流検出アンプを 備えた100V定電流/ 定電圧 コントローラ データシート

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Documentation

Documentation

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 external-link
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LT3796EFE#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3796EFE-1#PBF 28-Lead TSSOP w/ EP external-link
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LT3796EFE-1#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3796HFE#PBF 28-Lead TSSOP w/ EP external-link
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LT3796HFE#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3796HFE-1#PBF 28-Lead TSSOP w/ EP external-link
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LT3796HFE-1#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3796IFE#PBF 28-Lead TSSOP w/ EP external-link
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LT3796IFE#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3796IFE-1#PBF 28-Lead TSSOP w/ EP external-link
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LT3796IFE-1#TRPBF 28-Lead TSSOP w/ EP external-link
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Apr 6, 2022

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LT3796EFE#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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DC1706A

LT3796EFE Demo Board | 100V LED Controller with Current Monitor; 8V to 85VIN, up to 85VOUT @ 0.4A

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DC1706A

LT3796EFE Demo Board | 100V LED Controller with Current Monitor; 8V to 85VIN, up to 85VOUT @ 0.4A

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DC1706A
LT3796EFE Demo Board | 100V LED Controller with Current Monitor; 8V to 85VIN, up to 85VOUT @ 0.4A
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Product Detail

DC1706A is a 100V LED controller with an input current monitor. It is a single switch boost LED driver with LED+ to GND short circuit protection. It accepts an input voltage from 8V to 100V (7.5V UVLO and 8.7V turn-on), and drives up to 85V of LEDs at 400mA (when PVIN is less than VLED). DC1706A features both PWM and analog dimming of the LED string. It has a VMODE flag that indicates when the LED string has been removed and it has a FAULT flag that indicates that the output has been shorted to GND. In both cases, the IC remains in control and well protected.

Resources

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DC1706A - Demo Manual Download

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DC1706A - Schematic Download

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DC1706A - Design Files Download

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Evaluation Kits1

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DC1706A

LT3796EFE Demo Board | 100V LED Controller with Current Monitor; 8V to 85VIN, up to 85VOUT @ 0.4A
Tools & Simulations

Tools & Simulations 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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LT3796-1/LTC1541 Demo Circuit - SEPIC LED Driver with 100:1 Analog Dimming (8-20V to 35V String @ 1A) Download

8.00K

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LT3796 Demo Circuit - Boost LED Driver with Output Short Circuit Protection & LED Current Monitor (9-60V to 85V LED String @ 400mA) Download

6.00K

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LT3796 Demo Circuit - Boost LED Driver with Input Current Monitor (9-60V to 85V LED String @ 400mA) Download

5.00K

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LT3796 - LED Driver IC Download

4 K

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