LT3796EFE#PBF

LT3796 is a DC/DC controller 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. It 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 upto 3000:1. It is used in applications such as high power LED, high voltage LED, dual string, battery and supercap chargers, accurate current limited voltage regulators etc.

• Wide input voltage range is 6V to 100V, short-circuit protection
• Current monitoring upto 100V, frequency synchronization
• High side PMOS disconnect and PWM switch driver
• Constant-current and constant-voltage regulation
• Dual current sense amplifiers with reporting, VIN shutdown current is 1µA typ at (EN/UVLO = 0V)
• C/10 detection for battery and supercap charging, linear current sense threshold programming
• Programmable open LED protection with active-low VMODE flag
• Programmable undervoltage lockout with hysteresis
• Soft-start with programmable fault restart timer
• Operating junction temperature is -40°C to 125°C, package style is 28-lead plastic TSSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party