RT8477A Overview
The RT8477A is a current mode PWM controller designed to drive an external MOSFET for high current LED applications with wide input voltage (4.5V to 50V) and output voltage (up to 50V) ranges. With internal 380kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control.
RT8477A Key Features
- Buck Constant Current Converter
- High Voltage : VIN up to 50V, VOUT up to 50V
- 380kHz Fixed Switching Frequency
- Analog or PWM Control Signal for LED Dimming
- Internal Soft-Start to Avoid Inrush Current
- Under-Voltage Lockout
- Thermal Shutdown