GS5903 Overview
The GS5903 is designed to drive up to 10 white LEDs in series with a 3.6V cell Li-Ion battery. It works as a boost converter using current mode, 1.2MHz PWM frequency with the measure of an external current sense resistor to regulate the LED current. In order to minimize the power loss and keep the efficiency, the feedback voltage is designed as low as 300mV.
GS5903 Key Features
- Wide Input Voltage from 2.75V to 6V
- 300mV Feed-Back Voltage
- 40V Open Load Protection
- DC Voltage/PWM Dimming Control
- 1A Maximum Driving Current
- Integrated 400mΩ MOSFET Switch
- 1.2MHz Switching Frequency
- 2.75V UVLO Protection