Datasheet > AN-400A

AN-400A

更新时间： 2022-10-09 17:27:41

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		控制器
页数	文件大小	规格书
8页	299K
描述
Low-Power Green-Mode PWM Flyback Power Controller

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AN-400A 数据手册

www.fairchildsemi.com

AN-400A

Low-Power Green-Mode PWM Flyback Power Controller

without Secondary Feedback

Abstract

This highly integrated PWM controller, FAN400A, offers

several features to enhance the performance of a flyback

converter for low-power applications. Using the controller

reduces the costs of battery chargers and AC adapters. The

no-load power consumption can be less than 200mW for

universal AC input voltage range to meet the power

conservation requirements.

GND

GATE

VDD

SENSE

Features

Linearly Decreasing PWM Frequency

Green Mode Under Light-load and Zero-load Conditions

Constant Voltage (CV) and Constant Current (CC)

No Secondary Feedback

Figure 1. SOT-26 Pin Configuration

Low Startup Current: 8μA

Low Operating Current: 3.6mA

Leading-edge Blanking

GND

GATE

VDD

Constant Power Limit

Universal AC Input Range

Synchronized Slope Compensation

140°C OTP Sensor with Hysteresis

V_DDOver-Voltage Clamping

Cycle-by-cycle Current Limiting

Under voltage lockout (UVLO)

Fixed PWM Frequency with Hopping

Gate Output Maximum Voltage Clamped at 17V

Small SOT-26 Package

SENSE

Figure 2. DIP-8 Pin Configuration

Rev. 1.0.0 • 5/29/08

www.fairchildsemi.com

12 3 4 5 6 7 8

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