基于TEA1733的低成本绿色75W开关电源控制设计方案

2011-05-15 09:15:13来源: 互联网 关键字:绿色  设计方案

NXP公司的TEA1733是低成本绿色75W开关电源(SMPS)控制器,用于固定频率模式和反激拓扑.TEA1733集成了频率抖动器以降低EMI,并集成了超功率保护(OPP),输入欠压保护(UVP),过压保护(OVP),输出OVP和超温保护(OTP),可以用在需要效率和高性价比的75W功率电源解决方案.本文介绍了TEA1733主要特性, 方框图, 典型配置框图和典型应用框图.

The TEA1733(L) is a low cost Switched Mode Power Supply (SMPS) controller IC intended for flyback topologies. The TEA1733(L) operates in fixed frequency mode. To reduce ElectroMagnetic Interference (EMI), frequency jitter has been implemented. For Continuous Conduction Mode (CCM) operation, slope compensation is integrated. The TEA1733(L) IC features an OverPower Protection (OPP). The controller can be set to accept an overpower situation for a limited amount of time.

Two pins are reserved for protection purposes. Input UnderVoltage Protection (UVP) and OverVoltage Protection (OVP), output OVP and OverTemperature Protection (OTP) can be implemented with a minimal number of external components.

At low power levels the primary peak current is set to 25 % of the maximum peak current and the switching frequency is reduced to limit the switching losses. The combination of fixed frequency operation at high output power and frequency reduction at low output power provides high efficiency over the total load range.

The TEA1733(L) enables low cost, highly efficient and reliable supplies for power requirements up to 75 W to be designed easily and with a minimum number of external components.

TEA1733(L) 主要特性:

• SMPS controller IC enabling low cost applications

• Large input voltage range (12 V to 30 V)

• Very low supply current during start-up and restart (typically 10 A)

• Low supply current during normal operation (typically 0.5 mA without load)

• Overpower or high/low line compensation

• Adjustable overpower time-out

• Adjustable overpower restart timer

• Fixed switching frequency with frequency jitter to reduce EMI

• Frequency reduction with fixed minimum peak current at low power operation to maintain high efficiency at low output power levels

• Slope compensation for CCM operation

• Low and adjustable OverCurrent Protection (OCP) trip level

• Adjustable soft start

• Two protection inputs (e.g. for input UVP and OVP, OTP and output OVP)

•IC overtemperature protection

TEA1733(L) 应用:

• The devices can be used in all applications that require an efficient and cost-effective
power supply solution of up to 75 W.


图1.TEA1733方框图

图2.TEA1733典型配置框图

图3.TEA1733典型应用框图

关键字:绿色  设计方案

编辑:神话 引用地址:http://www.eeworld.com.cn/mndz/2011/0515/article_8512.html
本网站转载的所有的文章、图片、音频视频文件等资料的版权归版权所有人所有,本站采用的非本站原创文章及图片等内容无法一一联系确认版权者。如果本网所选内容的文章作者及编辑认为其作品不宜公开自由传播,或不应无偿使用,请及时通过电子邮件或电话通知我们,以迅速采取适当措施,避免给双方造成不必要的经济损失。

上一篇:基于FSQ510的RD-267 4.2W电源设计方案
下一篇:能源、工业和汽车应用的锂电池监控和保护系统

关注eeworld公众号 快捷获取更多信息
关注eeworld公众号
快捷获取更多信息
关注eeworld服务号 享受更多官方福利
关注eeworld服务号
享受更多官方福利
推荐阅读
全部
绿色
设计方案

小广播

独家专题更多

东芝在线展会——芯科技智社会创未来
东芝在线展会——芯科技智社会创未来
2017东芝PCIM在线展会
2017东芝PCIM在线展会
TI车载信息娱乐系统的音视频解决方案
TI车载信息娱乐系统的音视频解决方案
汇总了TI汽车信息娱乐系统方案、优质音频解决方案、汽车娱乐系统和仪表盘参考设计相关的文档、视频等资源
电子工程世界版权所有 京ICP证060456号 京ICP备10001474号 电信业务审批[2006]字第258号函 京公海网安备110108001534 Copyright © 2005-2017 EEWORLD.com.cn, Inc. All rights reserved