TOP250YN Datasheet PDF - Power Integrations

The TOP250YN is a 135W extended power design flexible integrated Off-line Switcher uses the same proven topology as TOPSwitch and it integrating the high voltage power MOSFET, PWM control, fault protection and other control circuitry onto a single CMOS chip. Many new functions are integrated to improve design flexibility, performance and energy efficiency. Line feed-forward with maximum duty cycle (DCMAX) reduction rejects line ripple and limits DCMAX at high line.

● Eliminate or reduce cost of external components

● Fully integrated soft-start for minimum stress/over-shoot

● Externally programmable accurate current limit

● Wider duty cycle for more power, smaller input capacitor

● Line under-voltage detection - No turn OFF glitches

● Line over-voltage shutdown extends line surge limit

● Regulates to zero load without dummy loading

● Hysteretic thermal shutdown for automatic fault recovery

● Large thermal hysteresis prevents PC board over-heating