Datasheet > AN-9731

AN-9731

更新时间： 2024-02-29 15:42:13

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		功率因数校正控制器
页数	文件大小	规格书
22页	1396K
描述
LED Application Design Guide Using BCM Power Factor Correction (PFC) Controller for 100W Lighting System

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

AN-9731 数据手册

www.fairchildsemi.com

AN-9731

LED Application Design Guide Using BCM Power Factor

Correction (PFC) Controller for 100W Lighting System

1. Introduction

This application note presents practical step-by-step

design considerations for a Boundary-Conduction-Mode

(BCM) Power-Factor-Correction (PFC) converter

employing Fairchild PFC controller, FL7930. It includes

designing the inductor and Zero-Current-Detection (ZCD)

circuit, selecting the components, and closing the control

loop. The design procedure is verified through an

experimental 140W prototype converter.

signal for another power stage controller after PFC stage or

be transferred to the secondary side to synchronize the

operation with PFC voltage condition. This simplifies the

external circuit around the PFC controller and saves BOM

cost. The internal proprietary logic for detecting input

voltage improves the stability of PFC operation. Together

with the maximum switching frequency clamping at

300kHz, FL7930 can limit inductor current to within pre-

designed ranges at one or two cycles of the AC-input-

absent test to simulate a sudden blackout. Due to the

startup-without-overshoot design, audible noise from

repetitive OVP triggering is eliminated. Protection

functions include output over-voltage, over-current, open-

feedback, and under-voltage lockout.

Unlike the Continuous Conduction Mode (CCM)

technique often used at this power level, BCM offers

inherent zero-current switching of the boost diodes (no

reverse-recovery losses), which permits the use of less-

expensive diodes without sacrificing efficiency.

The FL3930B provides an additional OVP pin that can be

used to shut down the boost power stage when output

voltage exceeds the OVP level due to damaged resistors

connected at the INV pin. The FL7930C provides a PFC-

ready pin can be used to trigger other power stages when

PFC output voltage reaches the proper level (with

hysteresis). This signal can be used as the V_CCtrigger

An Excel^®-based design tool is available with this

application note and the design result is shown with the

calculation results as an example.

Figure 1. Typical Application Circuit

Rev. 1.0.0 • 3/24/11

www.fairchildsemi.com

12 3 4 5 6 7...22

中文翻译

下载PDF

与AN-9731相关器件

型号	品牌	获取价格	描述	数据表
AN-9732	FAIRCHILD	获取价格	LED Application Design Guide Using BCM Power Factor Correction (PFC) Controller for 200W L
AN-9735	FAIRCHILD	获取价格	Design Guideline for LED Lamp Control Using Primary-Side Regulated Flyback Converter, FAN1
AN-9736	FAIRCHILD	获取价格	Design Guideline of AC-DC Converter Using FL6961, FL6300A for 70W LED Lighting
AN-9737	FAIRCHILD	获取价格	Design Guideline for Single-Stage Flyback AC-DC Converter Using FL6961 for LED Lighting
AN-9738	FAIRCHILD	获取价格	Design Guideline on 150W Power Supply for LED Street Lighting Design Using FL7930B and FAN
AN-9741	FAIRCHILD	获取价格	Design Guideline for LED Lamp Control Using Primary-Side Regulated Flyback Converter, FL10
AN-9744	FAIRCHILD	获取价格	Smart LED Lamp Driver IC with PFC Function
AN-9745	FAIRCHILD	获取价格	Design Guide for TRIAC Dimmable LED Driver Using FL7730
AN-9750	FAIRCHILD	获取价格	High-Power Factor Flyback Converter for LED Driver with
AN9768	LITTELFUSE	获取价格	Transient Suppression Devices and Principles

与AN-9731相关文章

MBRS340T3G手册解读：参数说明、产品特性及应用
2024-06-28

6
PMOS管背靠背连接：串联还是并联？
2024-06-28

7
高压电解电容的分类与选型策略
2024-06-28

8
数码管：基本概念、分类、技术发展及市场趋势
2024-06-27

14

产品中心

服务支持

精选活动

关于我们

帮助中心

AN-9731

AN-9731 数据手册

与AN-9731相关器件

与AN-9731相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AN-9731

AN-9731 数据手册

与AN-9731相关器件

与AN-9731相关文章

您还可以找

您在本页遇到什么问题？