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TC203C

Description
High performance current mode pwm switching power supply controller IC; high performance current mode pwm controller. Specifically designed for cost-effective AC/DC converters.
Categorysemiconductor    Power management   
File Size552KB,12 Pages
ManufacturerETC
Download Datasheet View All

TC203C Overview

High performance current mode pwm switching power supply controller IC; high performance current mode pwm controller. Specifically designed for cost-effective AC/DC converters.

TC203C
(文件编号:S&CIC1214)
概述
高性½电流模式
PWM
开关电源控制器
IC
高性½电流模式
PWM
控制器。
专为高性价比
AC/DC
½换器设计。
85V-265V
的½电压范围内提供高达
12W
的连续输出功率,峰值输出功率更可以达到
18W。优化的高合理性的电路设计结合高性½价格比的双极型制½工
艺,最大程度上节约了产品的整½成本。该电源控制器可工½于典型的反激电路拓扑中,构成简洁的
AC/DC
½换
器。IC 内部的启动电路被设计成一种独特的电流吸入方式,可利用功率开关管本身的放大½用完成启动,这显著
地降½了启动电阻的功率消耗;而在输出功率较小时
IC
将自动降½工½频率,从而实现了极½的待机功耗。在功
率管截止时,内部电路将功率管反向偏½,直接利用了双极性晶½管的
CB
高耐压特性,大幅提高功率管的耐电压
½力直到
700V
的高压,这保证了功率管的安全。IC 内部还提供了完善的防过½½防饱和功½,可实时防范过½½、变
压器饱和、输出短路等异常状况,提高了电源的可靠性。电流限制及时钟频率可由外部器件进行设定。
特点
内½700V高压功率开关管,极少的外围器件
锁存脉½调制,逐脉冲限流检测
½输出降频功½,无输出功耗可½于0.3W
内建斜坡与反馈补偿功½
独立上限电流检测控制器,实时处理控制器的过流、过½½
关断周期发射极偏压输出,提高了功率管的耐压
内½具有温度补偿的电流限制电阻,精确电流限制
内½热保护电路
利用开关功率管的放大½用完成启动,启动电阻的功耗减少10倍以上
极少的外围元器件
½启动和工½电流
VCC过压自动限制
½电压连续输出功率可达12W,峰值输出功率可达18W
封装½式:DIP-8
产品应用
适配器(如:便携式充电器、外½电源盒等)
开放式电源(如:DVD、DVB 等)
1
页 共
12
86-755-83468588
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