您现在的位置:首页 > 科技成果科技成果

基于TOP266EG的27W LCD监视器电源设计方案

发布时间:2014-12-09 13:35:48  来源:大电流电感厂家   查看:
TOPSwitch-JX 系列TOP266EG是高性价比器件,它集成了725V 功率MOSFET,高压开关电流源,多模式PWM控制,振荡器,热关断电路,故障保护以及其它控制电路.265 VAC时无负载的功耗低于100 mW,工作频率132 kHz,降低了变压器尺寸和电源的体积.本文介绍了TOPSwitch-JX 系列主要特性,产品亮点,功能方框图,以及65W 19V和30W 12V通用输入反激电源电路图,27W LCD监视器电源参考设计主要指标,电路图以及所用材料清单(BOM).

Power Supply Using TOP266EG

90 VAC–265 VAC Input; 5V, 2.5A and 14.5V, 1A Outputs

Application LCD Monitor

TOPSwitch-JX cost effect扁平型电感ively incorporates a 725 V power MOSFET, high voltage switched current source, multi-mode PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.

TOP266EG产品亮点

• EcoSmart® - Energy Efficient

• Energy efficient over entire load range

• No-load consumption below 100 mW at 265 VAC

• Up to 750 mW standby output power for 1 W input at 230 VAC High Design Flexibility for Low System Cost

• Multi-mode PWM control maximizes efficiency at all loads

• 132 kHz operation reduces transformer and power supply size

• 66 kHz option for highest efficiency requirements

• Accurate programmable current limit

• Optimized line feed-forward 绕线贴片电感for line ripple rejection

• Frequency jittering reduces EMI filter cost

• Fully integrated soft-start for minimum startup stress

• 725 V rated MOSFET

• Simplifies meeting design derating requirements Extensive Protection Features

• Auto-restart limits power delivery to <3% during overload faults

• Output short-circuit protection (SCP)

• Output over-current protection (OCP)

• Output overload protection (OPP)

• Output overvoltage protection (OVP)

• User programmable for hysteretic/latching shutdown

• Simple fast AC reset

• Primary or secondary sensed

• Line undervoltage (UV) detection prevents turn-off glitches

• Line overvoltage (OV) shutdown extends line surge withstand

• Accurate thermal shutdown with large hysteresis (OTP) Advanced Package Options

• eDIP™-12 package:

• Low profile horizontal orientation for ultra-slim designs

• Heat transfer to both PCB and heat sink

• Optional external heat sink provides thermal impedance equivalent to a TO-220

• eSIP®-7C package:

• Vertical orientation 塑封电感器for minimum PCB footprint

• Simple heat sink mounting using clip provides thermal impedance equivalent to a TO-220

• Extended creepage to DRAIN pin

• Heat sink is connected to SOURCE for low EMI

图1.TOP266EG 功电感厂家能方框图(E和V封装)

图2.采用TOP266EG的65W 19V通用输入反激电源电路图

图3.采用TOP266EG的30W 12V通用输入反激电源电路图

27W LCD监视器电源设计方案

This document is an engineering report describing a 5 V / 2.5 A, 14.5 V / 1 A power supply utilizing a TOP266EG. The TOP266EG is part of the TOPSwitch-JX IC family from Power Integrations. The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.


图4.27W LCD监视器电源参考设计外形图

27W LCD监视器电源参考设计指标:


图5.27W LCD监视器电源参考设计电路图
平面变压器厂家 | 平面电感厂家

锂电池电量监测IC选型4节锂电池并联(电池电压最高4.2V),对这个电池组进行电量监测用什么芯片。 Ti上看了用阻抗跟踪的比较准,成本也较高。 1、如果降低成本用只监测电压预估电量的(也就是电压比较器)常用IC有哪些?2、如果选用较为精确的电量计,大家有用过哪些?满意回复+10yanwen217 查看完整内容系统有ADC口吧,用一级运放做跟随隔离,给到AD检测电压。 如果系

[变压器]脉冲变压器驱动的疑问 本帖最后由 poorhack 于 2015-7-14 10:23 编辑 如下图所示,脉冲变压器的驱动电路,由于电流,功率都很小,所以直接用三极管驱动。 不知道用npn和pnp这两种电路有什么区别。 第一张图在实际实验时发现变压器初级电压并不高,导致次级放大电压也不高,我尝试在初级并联一个谐振电容,效果也不好,求解。 已经解决了,是三极管选型选错满意回复

电源学习中几个小问题,求教各位小弟在电源学习中,碰到一些问题。经常这一次没搞懂,放到下次遇到同样问题还是没搞懂。久而久之,积累太多疑问了。



1、磁性损耗单位的W/set,这个单位怎么理解?下图是在一个厂家

CopyRight2014
大电流电感 | 大功率电感 | 扁平线圈电感 注塑加工厂