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T0P243

Power Integrations
Part Number T0P243
Manufacturer Power Integrations
Description Integrated Off-line Switcher
Published May 27, 2006
Detailed Description www.DataSheet4U.com TOP242-249 TOPSwitch®-GX Family Extended Power, Design Flexible, EcoSmart®, Integrated Off-line Swi...
Datasheet PDF File T0P243 PDF File

T0P243
T0P243

Overview
www.
DataSheet4U.
com TOP242-249 TOPSwitch®-GX Family Extended Power, Design Flexible, EcoSmart®, Integrated Off-line Switcher ® Product Highlights Lower System Cost, High Design Flexibility • Extended power range to 250 W • 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 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 DC at high line MAX • 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 packages for video applications • Hysteretic thermal shutdown for automatic fault recovery • Large thermal hysteresis prevents PC board overheating EcoSmart - Energy Efficient • Extremely low consumption in remote off mode (80 mW @ 110 VAC, 160 mW @ 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, the TOPSwitch-GX family has either 1 or 3 additional pins over the standard DRAIN, SOURCE and CONTROL terminals.
allowing the following functions: line sensing (OV/UV, line feedforward/DC max reduction), accurate externally set current limit, remote on/off, and synchronization to an external lower frequency and frequency selection (132 kHz/...


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