關(guān)鍵詞： 安森美 , 電源

基本介紹：

安森美不斷推出多種電源的解決方案。NCP1027是屬于安森美NPC10XX系列的產(chǎn)品。擁有 65 kHz脈寬調(diào)制(PWM)控制器集成700 V MOSFET：可調(diào)節(jié)斜坡補(bǔ)償特性支持深度CCM工作，優(yōu)化滿載能效。跳周期模式工作優(yōu)化輕載能效。

基本性能：

內(nèi)含700V功率的MOSFET,典型RSDON為5.8歐

采用電流控制型工作，振蕩頻率內(nèi)不固定在65KHZ

最大峰值電流800mA。

軟模式的跨越式工作，峰值電流較低

內(nèi)部含高壓?jiǎn)?dòng)電流源，設(shè)置了清潔無(wú)損耗的啟動(dòng)程序。

輸出保護(hù)電路，短路撤消后自動(dòng)恢復(fù)

輔助源自動(dòng)過(guò)壓保護(hù)

可調(diào)的布朗輸出保護(hù)

可調(diào)的過(guò)功率保護(hù)

常設(shè)的輸入至鎖死保護(hù)電路

內(nèi)部頻率抖動(dòng)，降低EM信號(hào)尖刺

占空比最大拓展到80%

空載待機(jī)功耗在AC265V時(shí)小于85mW

500mW負(fù)載在AC230下小于715mW。

方案簡(jiǎn)介;

This reference document describes a built−and−tested,GreenPoint[1] solution for an xDSL modem ac−dc adapter.This power supply reference design is intended for lowpower, off−line applications where a regulated outputvoltage is required. Applications would also includemodems, printers, routers, hubs and/or similar consumeraudio and video products that require a single output voltagein the 10 to 20 W range.

方案特點(diǎn)：

The power supply design is based aroundON Semiconductor’s NCP10xx family of monolithiccontrollers with an integrated 700 V MOSFET. In thisparticular design an NCP1027 is utilized in a 12 V, 1.3 Aoutput supply with a surge capability of over 1.6 A.

This design can be tailored for any output voltage fromseveral volts up to 28 V (or higher) with power outputs toapproximately 20 W (depending on the AC inputrequirement) by merely reconfiguring the transformer turnsratio and the voltage reference zener. The power supply willmeettypical safety agency isolation and leakage currentstandards and comply with FCC Part 15 Level B conductedEMI requirements and has an average efficiency of greaterthan 75%.

方案原理圖：

2012-11-12 12:24:48 上傳

2012-11-12 12:24:47 上傳

2012-11-12 12:24:46 上傳

2012-11-12 12:24:47 上傳