Datasheet > FSBH0F70WA

FSBH0F70WA

更新时间： 2024-11-19 12:23:39

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		开关
页数	文件大小	规格书
14页	834K
描述
Green Mode Fairchild Power Switch (FPSâ¢)

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中文翻译

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数据手册

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FSBH0F70WA 数据手册

June 2012

FSBH0F70WA, FSBH0170W, FSBH0270W

Green Mode Fairchild Power Switch (FPS™)

Features

Description

Brownout Protection with Hysteresis

Built-In 5ms Soft-Start Function

The highly integrated FSBH-series consists of an

integrated current-mode Pulse Width Modulator (PWM)

and an avalanche-rugged 700V SenseFET. It is

specifically designed for high-performance offline

Switched-Mode Power Supplies (SMPS) with minimal

external components.

Internal Avalanche-Rugged 700V SenseFET

Low Acoustic Noise During Light-Load Operation

High-Voltage Startup

The integrated PWM controller features include a

proprietary green-mode function that provides off-time

modulation to linearly decrease the switching frequency

at light-load conditions to minimize standby power

consumption. To avoid acoustic-noise problems, the

minimum PWM frequency is set above 18kHz. This

green-mode function enables the power supply to meet

international power conservation requirements. The

PWM controller is manufactured using the BiCMOS

process to further reduce power consumption. The

FSBH-series turns off some internal circuits to improve

power saving when V_FBis lower than 1.6V, which allows

an operating current of only 2.5mA.

Linearly Decreasing PWM Frequency to 18KHz

Peak-Current-Mode Control

Cycle-by-Cycle Current Limiting

Leading-Edge Blanking (LEB)

Synchronized Slope Compensation

Internal Open-Loop Protection

V_DDUnder-Voltage Lockout (UVLO)

V_DDOver-Voltage Protection (OVP)

Internal Auto-Restart Circuit (OVP, OTP)

Constant Power Limit (Full AC Input Range)

Internal OTP Sensor with Hysteresis

The FSBH-series has built-in synchronized slope

compensation to achieve stable peak-current-mode

control. The proprietary external line compensation

ensures constant output power limit over a wide AC

input voltage range, from 90V_ACto 264V_AC

Applications

The FSBH-series provides many protection functions. In

addition to cycle-by-cycle current limiting, the internal

open-loop protection circuit ensures safety when an

open-loop or output short occurs. PWM output is

disabled until V_DDdrops below the V_TH-OLP, then the

controller starts up again. As long as V_DDexceeds 28V,

the internal OVP circuit is triggered.

General-purpose switched-mode power supplies and

flyback power converters, including:

Auxiliary Power Supply for PC and Server

SMPS for VCR, SVR, STB, DVD & DVCD Player,

Printer, Facsimile, and Scanner

Adapter for Camcorder

Compared with a discrete MOSFET and controller or

RCC switching converter solution, the FSBH-series

reduces component count, design size, and weight;

while increasing efficiency, productivity, and system

reliability. These devices provide a basic platform that is

well suited for the design of cost-effective flyback

converters, such as in PC auxiliary power supplies.

FSBH0F70WA/0170W/0270W • Rev. 1.0.2

www.fairchildsemi.com

12 3 4 5 6 7...14

中文翻译

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