# 功率因数校正 – 支持与培训

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### 功率因数校正培训

TI 提供各种适用于功率因数校正电路的设计资源。开始概略了解 PFC 设计的相关基础知识，或更深入了解应用特定设计的注意事项。借助下列资源开始您的设计或进行微调，以满足行业规范和认证要求。

### 基础知识

Understanding boost power stages in switchmode power supplies The report includes detailed steady-state and small-signal analysis of the boost power stage operating in continuous and discontinuous modes. A discussion of power stage component requirements is included.
Understanding buck power stages in switchmode power supplies This report addresses the buck power stage only and does not cover control circuits. Detailed steady-state and small-signal analysis of the buck power stage operating in continuous and discontinuous mode are presented.
Practical considerations in current mode power supplies This detailed section contains an in-depth explanation of the numerous PWM functions, and how to maximize their usefulness.
Designing high-power factor off-line power supplies This paper provides a tutorial on power factor correction topologies and control techniques.
Magnetics design handbook This manual provides a comprehensive approach to magnetics design especially relevant to high frequency SMPS applications.
Power factor correct (PFC) basics and design considerations This video training series discusses PFC basics, topology comparisons and design considerations to achieve a cost-optimized and efficient PFC design.

### 设计技巧

Design review of a full-featured 350-w offline power converter This paper shows a complete, state-of-the-art, high-performance and high-efficient analog power-supply system with full monitoring by a microcontroller.
PFC pre-regulator frequency dithering circuit This article covers a novel technique to dither the switching frequency 20% of an off-line Power Factor Corrected (PFC) pre-regulator resulting in a significant EMI reduction.
Understanding noise-spreading techniques and effects in switch mode power apps This topic explores modulation techniques, models the behavior in SPICE, and examines real-world behavior in two practical examples.
Constructing your power supply – layout considerations This topic addresses methods to keep circuit parasitic components from degrading the operation of your designs.
Safety considerations in power supply design This simplified overview provides a basic introduction to the issues and design solutions implicit in assuring the safety for both the user and service personnel of the power supply products, as well as easing the certification process.

### 应用

A 600-W input, isolated PFCc power supply for AVR amplifiers This user guide documents a low-profile power supply that is suitable for AVR amplifiers or other high power amplifier applications. The power supply accepts an ac line-input voltage (108 VRMS to 265 VRMS), and produces an output voltage of 50-VDC for loads up to 12 A (600 W).
A 300-W, universal input, Isolated PFC Power Supply for LCD TV Applications This guide documents a low-profile power supply that is suitable for powering LCD TVs or other flat screen applications. The power supply accepts a universal AC line-input voltage (85 VRMS to 265 VRMS), and produces an output voltage of 24-VDC for loads up to 12 A (288 W).
LED driver based on UCC28060 interleaved ACDC single stage Flyback Interleaved PFC (UCC28060, UCC28061, UCC28063, UCC28063A) can be implemented in an ACDC single stage solution with transition mode interleaved Flyback topology. This note will discuss the design considerations and give a practical design example.
UCC28050 100-W PFC ballast pre-regulator The UCC28050 100-W PFC ballast pre-regulator is a power converter that converts a line voltage of 108 V to 300 V RMS to a 467-V, 100-W, regulated dc output with power factor correction (PFC). This design was done on a single sided copper PCB and was specifically designed as a ballast pre-regulator.
Design review of a 2-kW parallelable power-supply module This video describes the selection of the main power stages, including a continuous conduction mode (CCM) power-factor-correction circuit. Also included is a peak current mode-controlled isolated DC/DC resonant phase-shifted fullbridge converter with synchronous rectification.

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