SG6859

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
13页	473K
描述
Low Cost Green-Mode PWM Controller for Flyback Converters

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SG6859 数据手册

Product Specification

Low Cost Green-Mode PWM Controller for Flyback Converters

SG6859

FEATURES

DESCRIPTION

Green-Mode PWM

This highly integrated PWM controller provides

several special 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 easily meet even the strictest power

conservation requirements.

Supports the “Blue Angel” Standard

Low Start-up Current (9uA)

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)

Programmable PWM Frequency with Frequency

Hopping

V_DDOver Voltage Protection (Auto Restart)

Gate Output Voltage Clamped at 17V

Low Cost

Few External Components Required

Small SOT-26 and Dip 8 Packages

The BiCMOS fabrication process enables reducing

the start-up current to 9uA, 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 even during short-circuits.

APPLICATIONS

To protect the external power MOSFET from being

damaged by supply over voltage, the SG6859’s output

driver is clamped at 17V. SG6859 controllers can be used

to improve the performance and reduce the production

cost of power supplies. The SG6859 is the best choice for

replacing linear and RCC-mode power adapters. It is

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

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 other

auxiliary supplies, home appliances, and consumer

electronics

Replacements for linear transformers and RCC

SMPS

PC 5V standby power.

TYPICAL APPLICATION

SG6859

Version 1.2.1(IAO33.0067.B2)

- 1 -

www.sg.com.tw • www.fairchildsemi.com

September 28,2007

12 3 4 5 6 7...13

中文翻译

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与SG6859相关器件

型号	品牌	获取价格	描述	数据表
SG6859A	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
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

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