USL3531 Overview
The UTC USL3531 is a high performance, high precision and low cost constant current LED driver for non-isolated buck application. The device operates in critical conduction mode and is suitable for 85V~265V universal input offline LED lighting. It operates in critical conduction mode, the output current does not change with the inductance and LED output voltage.
USL3531 Key Features
- Critical conduction mode operation
- Internal 500V Power MOSFET
- Ultra low operating current
- No auxiliary winding
- ±5% LED output current accuracy
- LED short protection
- LED open protection
- VCC under voltage protection
- Current sensing resistor short protection
- Thermal regulation function