TOP250YN Datasheet

TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher


TOPSwitch-GXuses the same proven topology as TOPSwitch, cost effectively integrating the high voltage power MOSFET, PWM control, fault protection and other control circuitry on to a single CMOS chip. Many new functions are integrated to reduce system cost and improve design flexibility, performance and energy efficiency.

Product Highlights
Lower System Cost, High Design Flexibility
•  Extended power range for higher power applications
•  No heatsink required up to 34 W using P package
•  Features eliminate or reduce cost of external components
•  Fully integrated soft-start for minimum stress/overshoot
•  Externally programmable accurate current limit
•  Wider duty cycle for more power, smaller input capacitor
•  Separate line sense and current limit pins on Y/R/F packages
•  Line under-voltage (UV) detection: no turn off glitches
•  Line overvoltage (OV) shutdown extends line surge limit
•  Line feed-forward with maximum duty cycle (DCMAX) reduction rejects line ripple and limits DCMAX
at high line
•  Frequency jittering reduces EMI and EMI filtering costs
•  Regulates to zero load without dummy loading
•  132 kHz frequency reduces transformer/power supply size
•  Half frequency option in Y/R/F packages for video applications
•  Hysteretic thermal shutdown for automatic fault recovery
•  Large thermal hysteresis prevents PC board overheating



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