基于UCC28070设计的300W PFC高效电源方案
本文介绍了ucc28070 主要特性，简化方框图和功能方框图，以及采用两个ucc28070的四相输出应用框图，300w交叉pfc预稳压器参考设计主要指标，控制器电路图和电源电路图。
ucc28070是ti公司的先进的功率因素修正器件，集成了两个工作在180度反相的pwm。 这种pwm交叉工作能降低输入和输出纹波电流，使得导电emi滤波变得更加容易，成本更低。可编程工作频率从30 khz 到300 khz，有极好的效率和多种保护功能，主要用在高效服务器和台式pc电源，通信整流器，白色家电和工业设备。
ucc28070 主要特性：
interleaved average current-mode pwm control
with inherent current matching
advanced current synthesizer current sensing for
superior efficiency
highly-linear multiplier output with internal quantized
voltage feed-forward correction for near-unity pf
programmable frequency (30 khz to 300 khz)
programmable maximum duty-cycle clamp
programmable frequency dithering rate and magnitude
for enhanced emi reduction
magnitude: 3 khz to 30 khz
rate: up to 30 khz
external clock synchronization capability
enhanced load and line transient response through voltage
amplifier output slew-rate correction
programmable peak current limiting
bias-supply uvlo, over-voltage protection, open-loop detection,
and pfc-enable monitoring
external pfc-disable interface
open-circuit protection on vsense and vinac pins
programmable soft start
20-lead tssop/soic packages
ucc28070 应用：
high-efficiency server and desktop power supplies
telecom rectifiers
white goods and industrial equipment
图1。ucc28070简化方框图
图2。ucc28070功能方框图
图3。采用两个ucc28070的四相输出应用框图
ucc28070 300w交叉pfc预稳压器参考设计
ucc28070 300-w interleaved pfc pre-regulator design review
in higher power applications to utilize the full line power and reduce line current harmonics pfc pre-regulators are generally required. in these high power applications interleaving pfc stages can reduce inductor volume and reduce input and output capacitor ripple current. this results in smaller overall magnetic volume and filter capacitor volume increasing the converters overall power density. this is made possible through distributing the power over two interleaved boost converters and the inductor ripple current cancellation that occurs with interleaving, reference [5]. this application note will review the design of a 300w two-phase interleaved power factor corrected (pfc) pre-regulator. this power converter achieves pfc with the use of the ucc28070 interleaved pfc controller, reference。
参考设计指标：
图4。典型平均电流模式交叉pfc预稳压器电路图
图5。300w原型子板控制器电路图
图6。300w原型主板电源电路图
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ucc28070是ti公司的先进的功率因素修正器件，集成了两个工作在180度反相的pwm。 这种pwm交叉工作能降低输入和输出纹波电流，使得导电emi滤波变得更加容易，成本更低。可编程工作频率从30 khz 到300 khz，有极好的效率和多种保护功能，主要用在高效服务器和台式pc电源，通信整流器，白色家电和工业设备。
ucc28070 主要特性：
interleaved average current-mode pwm control
with inherent current matching
advanced current synthesizer current sensing for
superior efficiency
highly-linear multiplier output with internal quantized
voltage feed-forward correction for near-unity pf
programmable frequency (30 khz to 300 khz)
programmable maximum duty-cycle clamp
programmable frequency dithering rate and magnitude
for enhanced emi reduction
magnitude: 3 khz to 30 khz
rate: up to 30 khz
external clock synchronization capability
enhanced load and line transient response through voltage
amplifier output slew-rate correction
programmable peak current limiting
bias-supply uvlo, over-voltage protection, open-loop detection,
and pfc-enable monitoring
external pfc-disable interface
open-circuit protection on vsense and vinac pins
programmable soft start
20-lead tssop/soic packages
ucc28070 应用：
high-efficiency server and desktop power supplies
telecom rectifiers
white goods and industrial equipment
图1。ucc28070简化方框图
图2。ucc28070功能方框图
图3。采用两个ucc28070的四相输出应用框图
ucc28070 300w交叉pfc预稳压器参考设计
ucc28070 300-w interleaved pfc pre-regulator design review
in higher power applications to utilize the full line power and reduce line current harmonics pfc pre-regulators are generally required. in these high power applications interleaving pfc stages can reduce inductor volume and reduce input and output capacitor ripple current. this results in smaller overall magnetic volume and filter capacitor volume increasing the converters overall power density. this is made possible through distributing the power over two interleaved boost converters and the inductor ripple current cancellation that occurs with interleaving, reference [5]. this application note will review the design of a 300w two-phase interleaved power factor corrected (pfc) pre-regulator. this power converter achieves pfc with the use of the ucc28070 interleaved pfc controller, reference。
参考设计指标：
图4。典型平均电流模式交叉pfc预稳压器电路图
图5。300w原型子板控制器电路图
图6。300w原型主板电源电路图
行业 | 盛美半导体宣布进军中国资本市场的战略计划
选气动球阀做为紧急切断阀门时该如何正确地操作
85-015G-XX-10095压力传感器的保温措施是什么？
哪一些策略推动了物联网产业的发展
采集仪器的防护等级介绍
基于UCC28070设计的300W PFC高效电源方案
IP知识百科之AI防火墙
飞航管制结合AR技术迈向虚拟化
为什么要实现无人驾驶落地，告诉你三个理由！
Altera支持硅片融合实现的混合系统架构
电源设计说明：SPICE热模型
小米9评测 有史以来最好的小米手机也有让人难以拒绝的价格
中芯国际表示，公司已按相关规定向美方申请继续供货华为
如何实现AI开发的普惠性 浅谈多模态AI开发套件HiLens Kit
工控机主板的主要技术和选型技巧
微软计划开发一款Surface设备，可能是PC也可能是电脑
空分设备云端监控—解决方案
埃维汽车北交所IPO获受理，新能源汽车设计业务高增长
东芝推出新品TR200固态硬盘，包装带有一丝＂电竞＂风
数码宝贝与和谐号FB08型机简介