原标题：Powerint TOP259LN 65W笔记本电脑电源方案

　　powerint 公司的65W笔记本电脑用适配器是采用TOP259LN的超小型电源解决方案. 适配器采用90 VAC – 265 VAC 输入, 输出为19.7 V, 3.33 A. 230VAC无负载输入的功耗非常低,小于250mW,满足能源之星2.0的节能要求, 115 V / 60 Hz和230 V / 50 Hz的效率大于88%,具有极好的瞬态负载响应.本文介绍TOP252-262 TOPSwitch-HX系列主要特性,方框图和多种应用电路,以及65W笔记本电脑用适配器参考设计电路图和材料清单.

　　TOP252-262 TOPSwitch-HX Family

　　Enhanced EcoSmart?, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range

　　TOP252-262 TOPSwitch-HX 系列主要亮点:

　　Lower System Cost, Higher Design Flexibility

　　Multi-mode operation maximizes effi ciency at all loads

　　New eSIP-7F and eSIP-7C packages

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

　　Low height is ideal for adapters where space is limited

　　Simple mounting using a clip to aid low cost manufacturing

　　Horizontal eSIP-7F package ideal for ultra low height adapter and monitor applications

　　Extended package creepage distance from DRAIN pin to adjacent pin and to heat sink

　　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/L packages) reduces transformer and power supply size

　　Half frequency option for video applications

　　Frequency jittering reduces EMI fi lter 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

　　TOP252-262 TOPSwitch-HX应用:

　　LCD monitors

　　Personal computers

　　Small servers

　　Laptop adapters

　　Set-top boxes

　　Digital TVs

　　Printers

　　DVD Players and Recorders

　　UPS

　　Video Games

　　Broadband Modems

　　Cellular phone adapters

　　Audio Amplifiers

　　图1.TOP252-262 TOPSwitch-HX典型反激应用

　　图2. TOP259YN, TOP260YN 和TOP261YN典型反激应用

　　图3.TOP252-262 TOPSwitch-HX功能方框图(P和 G 封装).

　　图4.TOP252-262 TOPSwitch-HX功能方框图(M封装).

　　图5.TOP252-262 TOPSwitch-HX功能方框图(TOP254-258 YN 封装和所有 eSIP 封装).

　　图6. TOP259YN, TOP260YN, TOP261YN功能方框图

　　图7.采用TOP258PN 的35 W 双输出电

　　图8.采用TOP258YN 的150 W 19V电源

　　图9.采用TOP258MN 的20W(连续)80W(峰值)通用输入电源

　　图10.采用TOP260EN 的65 W 19V电源

　　采用TOP259LN的超小型(15.4mm)65W适配器参考设计

　　指标:90 VAC – 265 VAC 输入; 19.7 V, 3.33 A 输出

　　图11.65W适配器参考设计外形图

　　65W适配器参考设计主要特性:

　　Low cost, low component count

　　Very compact design in a 15.4 mm thin case

　　Very low no-load input power (<250 mW at 230 VAC)

　　Meets Energy Star 2.0 Efficiency Requirements: >88% at 115 V / 60 Hz, and 230 V / 50 Hz, with very high efficiency in both standby and sleep modes

　　Excellent transient load response

　　Hysteretic thermal overload protection with automatic recovery

　　Latching OVP with fast AC reset

　　Meets limited power source requirements (<100 VA) with single point failure

　　Power Integrations eSIP low-profile package

　　Ultra-low profile transformer bobbin design (PI proprietary SLIMCORE™)

　　No potting required to meet thermal specifications

　　Meets radiated EMI with > 6dB margin

　　图12.65W适配器参考设计电路图

　　65W适配器参考设计材料清单(BOM):

　　详情请见: