RT8577A Overview
The RT8577A is an 4-CH LED driver capable of delivering 120mA for each channel. The RT8577A is a current mode boost converter with an adjustable switching frequency via the RT pin from 200kHz to 2.1MHz and a wide VIN range from 5.5V to 40V. The PWM output voltage loop selects and regulates the LED pin with the highest voltage string to 0.6V, hence allowing voltage mismatches between LED strings.
RT8577A Key Features
- Wide Input Supply Voltage Range : 5.5V to 40V
- Adjustable Boost Controller Switching Frequency
- Programmable Channel Current
- Channel Current Matching : ±1.5%
- External Dimming Control
- Boost MOSFET Over Current Protection
- Automatic LED Open/Short Protection to Avoid
- VCC Under Voltage Lockout
- Adjustable Over Voltage Protection
- Thermal Shutdown Protection