USL3638 Overview
DIP-8 The UTC USL3638 is a high performance, high precision primary-side feedback and regulation and constant current controller for LED lighting, The UTC USL3638 operates in discontinuous conduction mode for inductor current. It is suitable for flyback convertor under the 90V~264V universal input. The system output power for UTC USL3638 (SOP8) and UTC SOP-8 USL3638 (DIP8) is remended to be less than 8W and 11W.
USL3638 Key Features
- Built-in 650V Power MOSFET
- No Auxiliary winding for sensing and supplying
- Constant current control without secondary sense and
- Ultra low operating current to improve efficiency
- Universal input voltage
- ±5% LED current accuracy
- Choice for maximum duty cycle and OVP voltage
- CS resistor short circuit protection
- LED short and open circuit protection
- Over temperature protection