TOPSwitch-HX系列的主要性能特点

Power Integration 公司的TOPSwitch-HX系列是高性价比的电源解决方案，它集成了700 V 功率 MOSFET，高压开关电流源，PWM控制器，振荡器，热关断电路，故障保护和其它控制电路，广泛应用于各种AC/DC转换电源。本文介绍了TOPSwitch-HX系列的主要性能特点。

TOPSwitch-HX cost effectively incorporates a 700 V power MOSFET, high VOLTAGE switched current source, PWM CONTROL, oscillator, thermal shutdown CIRCUIT, fault protection and other control circuitry onto a monolithic device.

TOPSwitch-HX主要特性：

Lower SYSTEM Cost, Higher Design Flexibility

Multi-mode operation maximizes efficiency at all loads

New eSIP-7C PACKAGE builds on PI’s experience with high power and high reliability packages

Low thermal impedance junction-to-case (2 °C per watt)

Low height is ideal for adapters where space is limited

Simple mounting using a clip to aid low cost manufacturing

No HEATSINK required up to 35 W using P, G and M packages with universal input voltage and up to 48 W at 230 VAC

Output overvoltage protection (OVP) is user programmable for latching/non-latching shutdown with fast AC reset

Allows both primary and secondary sensing

Line undervoltage (UV) detection prevents turn-off glitches

Line overvoltage (OV) shutdown extends line surge limit

Accurate programmable current limit

Optimized line feed-forward for line ripple rejection

132 kHz frequency (254Y-258Y and all E packages) reduces TRANSFORMER and power supply size

Half frequency option for video applications

Frequency jittering reduces EMI FILTER cost

Heatsink is connected to SOURCE for low EMI

Improved auto-restart delivers <3% of MAXIMUM power in short circuit and open loop fault conditions

Accurate hysteretic thermal shutdown function automatically recovers without requiring a reset

Fully INTEGRATED soft-start for MINIMUM start-up stress

Extended creepage between DRAIN and all other pins improves field reliability

EcoSmart?– Energy Effi cient

Energy efficient over entire load range

No-load consumption

Less than 200 mW at 265 VAC for TOP256-258

Less than 300 mW at 265 VAC for TOP259-261

Standby power for 1 W input

>600 mW output at 110 VAC input

>500 mW output at 265 VAC input