NCP1280
NCP1280 is Active Clamp Voltage Mode PWM Controller manufactured by onsemi.
Active Clamp Voltage Mode PWM Controller for Off-Line Applications
The NCP1280 provides a highly integrated solution for off- line power supplies requiring high- efficiency and low parts count. This voltage mode controller provides control outputs for driving a forward converter primary MOSFET and an auxiliary MOSFET for active clamp circuit. The second output with its programmable delay can also be used for driving a synchronous rectifier on the secondary or for asymmetric half bridge circuits. Incorporation of high voltage startup circuitry (with 700 V capability) reduces parts count and system power dissipation. Additional Features such as line UV/OV protection, soft- start,...
