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.
Feature
- 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
