Datasheet > SG6848T

SG6848T

更新时间： 2024-10-27 22:43:15

品牌	Logo	应用领域
其他 - ETC		转换器光电二极管信息通信管理控制器
页数	文件大小	规格书
13页	264K
描述
Low Cost Green-Mode PWM Controller for Flyback Converters

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中文翻译

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SG6848T 数据手册

Product Specification

Low Cost Green-Mode PWM Controller for Flyback Converters

SG6848

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 (5uA)

Low Operating Current (2mA)

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

Gate Output Voltage Clamped at 15V

Low Cost

Few External Components Required

Small SOT-26 Package

The BiCMOS fabrication process enables reducing

the start-up current to 5uA, and the operating current to

2mA. 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 (90VAC to 264VAC). Pulse-by-pulse current

limiting ensures safe operation even during short-circuits.

APPLICATIONS

General-purpose switching mode power supplies and

flyback power converters, such as

To protect the external power MOSFET from being

damaged by supply over voltage, the SG6848’s output

driver is clamped at 15V. SG6848 controllers can be used

to improve the performance and reduce the production

cost of power supplies. The SG6848 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.

ꢀ

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

From bridge rectifier

120~ 380VDC

From auxiliary winding

C_IN

R_IN

10u

1.5M

VDD

100

OUTPUT

472p

SG6848

SENSE

R_S

95k

4.7

GND

- 1 -

www.sg.com.tw

May.06, 2003

Version 1.2(IRO33.0010.B0)

12 3 4 5 6 7...13

中文翻译

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与SG6848T相关器件

型号	品牌	获取价格	描述	数据表
SG6848TZ	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 75kHz Switching Freq-Max, BICMOS, PDSO6,
SG6849	ETC	获取价格	Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback
SG6849-100D	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 108kHz Switching Freq-Max, BICMOS, PDIP8,
SG6849-100DZ	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 108kHz Switching Freq-Max, BICMOS, PDIP8,
SG6849-100T	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 108kHz Switching Freq-Max, BICMOS, PDSO6,
SG6849-100TZ	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 108kHz Switching Freq-Max, BICMOS, PDSO6,
SG6849-65D	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 70kHz Switching Freq-Max, BICMOS, PDIP8,
SG684965DY	FAIRCHILD	获取价格	Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
SG684965DZ	FAIRCHILD	获取价格	Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
SG6849-65T	FAIRCHILD	获取价格	Switching Regulator/Controller, Current-mode, 70kHz Switching Freq-Max, BICMOS, PDSO6,

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