SG6859A

更新时间： 2024-10-28 03:32:27

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		转换器控制器
页数	文件大小	规格书
12页	580K
描述
Low-Cost, Green-Mode PWM Controller for Flyback Converters

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中文翻译

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SG6859A 数据手册

March 2008

SG6859A

Low-Cost, Green-Mode PWM Controller for Flyback Converters

Features

Description

This highly integrated PWM controller provides several

enhancements designed to meet the low standby-power

needs of low-power SMPS. To minimize standby power

consumption, the proprietary green-mode function

provides off-time modulation to linearly decrease the

switching frequency under light-load conditions. This

green-mode function enables the power supply to meet

even the strictest power conservation requirements.

Green-Mode PWM

Supports the “Blue Angel” Standard

Low Start-up Current: 9μA

Low Operating Current: 3mA

Leading-Edge Blanking

Constant Output Power Limit

Universal Input

Built-in Synchronized Slope Compensation

Current-Mode Operation

Cycle-by-cycle Current Limiting

Under-Voltage Lockout (UVLO)

The BiCMOS fabrication process enables reducing the

start-up current to 9μA and the operating current to

3mA. To further improve power conservation, a large

start-up resistance can be used. Built-in synchronized

slope compensation ensures the stability of peak

current mode control. Proprietary internal compensation

provides a constant output power limit over a universal

AC input range (90V_ACto 264V_AC). Pulse-by-pulse current

limiting ensures safe operation during short-circuits.

Programmable PWM Frequency with Frequency

Hopping

To protect the external power MOSFET from damage by

supply over voltage, the SG6859A’s output driver is

clamped at 17V. SG6859A controllers can be used to

improve the performance and reduce the production

cost of power supplies. The best choice for replacing

linear and RCC-mode power adapters, the SG6859A is

available in 8-pin DIP and 6-pin SOT-26 packages.

V_DDOver-Voltage Protection (Auto Restart)

Gate Output Voltage Clamped at 17V

Low Cost

Few External Components Required

Small SOT-26 Package

Applications

General-purpose switching mode power supplies and

flyback power converters, such as:

Battery chargers for cellular phones, cordless

phones, PDAs, digital cameras, and power tools

Power adapters for ink jet printers, video game

consoles, and portable audio players

Open-frame SMPS for TV/DVD standby and auxiliary

supplies, home appliances, and consumer electronics

Replacements for linear transformers and RCC SMPS

PC 5V standby power

Ordering Information

Part Number

SG6859ATZ

Operating Temperature Range

Package

SOT-26

DIP-8

Packing Method

Tape & reel

Tube

-20°C to +85°C

SG6859ADZ

All packages are lead free per JEDEC: J-STD-020B standard.

SG6859A Rev. 1.0.0

www.fairchildsemi.com

12 3 4 5 6 7...12

中文翻译

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与SG6859A相关器件

型号	品牌	获取价格	描述	数据表
SG6859A_10	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859ADY	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859ADZ	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859ATY	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859ATZ	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859DTY	ONSEMI	获取价格	Flyback & Forward PWM Controllers, SSOT 6L, 15000-TAPE REEL
SG6859DZ	FAIRCHILD	获取价格	Low Cost Green-Mode PWM Controller for Flyback Converters
SG6859TZ	FAIRCHILD	获取价格	Low Cost Green-Mode PWM Controller for Flyback Converters
SG6860	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6860DZ	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters

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