IS32LT3958A Overview
The IS32LT3958A is a current mode PWM controller designed to drive a low side external NMOS FET for wide input/output voltage range and high LED current applications. An external resistor senses the high side output current of the LED string. A high side sense resistor is the most flexible current sensing scheme, since it functions in either boost or buck-boost mode configurations.
IS32LT3958A Key Features
- Wide high voltage input range: 5V to 70V
- Supports boost, buck-boost, SEPIC and buck
- Supports either analog, internal PWM dimming or external PWM dimming
- Excellent fade on control by low duty cycle PWM dimming
- Standalone dual brightness output by internal PWM dimming
- Integrated PWM generator
- 100Hz~1kHz adjustable PWM frequency
- 5%~100% adjustable PWM duty cycle
- Excellent analog dimming capability
- Two analog dimming pins
IS32LT3958A Applications
- Wide high voltage input range: 5V to 70V
- Supports boost, buck-boost, SEPIC and buck
- Supports either analog, internal PWM dimming or external PWM dimming