Datasheet > SG6841SZ3

SG6841SZ3

更新时间： 2024-10-28 12:27:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		控制器
页数	文件大小	规格书
14页	539K
描述
High-integrated Green-mode PWM Controller

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SG6841SZ3 数据手册

Product Specification

High-integrated Green-mode PWM Controller

SG6841

FEATURES

DESCRIPTION

Green-mode PWM to support “Blue Angel” Norm

This highly integrated PWM controllers, SG6841 series,

provides several features to enhance the performance of

low power flyback converters. 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 assists the power

supply to easily meet the power conservation

requirement. Due to BiCMOS process, the start-up

current and operation current is reduced to 30uA and

3mA, respectively, to improve power conversion

efficiency. Large start-up resistance can be used for

further power saving. Built-in synchronized slope

compensation ensures the stability of peak current mode

control. A proprietary internal compensation ensures

constant output power limit for universal AC input

voltage from 90VAC to 264VAC.

Low start up current 30uA

Low operation current 3mA

Leading-edge blanking

Built-in synchronized slope compensation

Constant output power limit for universal AC input

Current mode operation

Cycle-by-cycle current limiting

Under voltage lockout (UVLO)

Programmable PWM frequency

GATE output maximum voltage clamped at 18V

Totem pole output includes soft driving for better

EMI

Build-in limited-power-control to meet safety

requirement

Programmable over-temperature protection

Few external components & low cost solution

SG6841 provides many protection functions.

Pulse by pulse current limit ensures a constant output

current under short circuit. If a short circuit failure or

over load happens, the SG6841 will shut off after a

continuous high voltage detection on FB pin. The gate

output is clamped at 18V to protect the power MOS

APPLICATIONS

General-purpose switching mode power supplies

and flyback power converters, and

Power Adapter

Open-frame SMPS

Battery Charger Adapter

from over voltage damage.

An external NTC

thermistor can be applied to sense the ambient

temperature for over-temperature protection. The

SG6841 series are available in 8-pin DIP and SO

packages.

TYPICAL APPLICATION

From bridge rectifier

127~ 373VDC

From auxiliary

winding

RIN

VIN

VDD

GATE

_RISG6842

SENSE

GND

- 1 -

www.sg.com.tw

Jun.15,2006

Version 2.1 (IRO33.0001.B5)

12 3 4 5 6 7...14

中文翻译

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与SG6841SZ3相关器件

型号	品牌	获取价格	描述	数据表
SG6842JLSZ	FAIRCHILD	获取价格	Highly-Integrated Green-Mode PWM Controller
SG6846	FAIRCHILD	获取价格	Control a Flyback Power Supply with Surge Current Output
SG6846A	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846A_08	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ACSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ACSZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ALSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ALSZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846B	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846BCSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller

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