TOP250 Datasheet | Power Integrations

Features eliminate or reduce cost of external ponents - 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 k Hz 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 Eco Smart - Energy Efficient - Extremely low consumption in remote off mode (80 m W at 110 VAC, 160 m W at 230 VAC) - Frequency lowered with load for high standby efficiency - Allows shutdown/wake-up via LAN/input port Description TOPSwitch-GX uses the same proven topology as TOPSwitch, cost effectively 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 reduce system cost and improve design flexibility, performance and energy efficiency. Depending on package type, either 1 or 3 additional pins over the TOPSwitch standard DRAIN, SOURCE and CONTROL terminals allow the following functions: line sensing (OV/UV, line feed-forward/DCMAX reduction), accurate externally set current limit, remote ON/OFF, synchronization to an external lower frequency, and frequency selection (132 k Hz/66 k Hz). All package types provide the following transparent features : Soft-start, 132 k Hz switching frequency (automatically reduced at light load), frequency jittering for lower EMI, wider DCMAX, hysteretic thermal shutdown, and larger creepage...