Datasheet > SG6849-100T

SG6849-100T

更新时间： 2024-10-28 20:32:47

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		信息通信管理光电二极管
页数	文件大小	规格书
15页	340K
描述
Switching Regulator/Controller, Current-mode, 108kHz Switching Freq-Max, BICMOS, PDSO6,

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中文翻译

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技术参数
数据手册

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SG6849-100T 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	包装说明：	TSOP, TSOP6,.11,37
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.85
Is Samacsys：	N	控制模式：	CURRENT-MODE
JESD-30 代码：	R-PDSO-G6	湿度敏感等级：	2A
端子数量：	6	最高工作温度：	85 °C
最低工作温度：	-30 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSOP	封装等效代码：	TSOP6,.11,37
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE
峰值回流温度（摄氏度）：	250	认证状态：	Not Qualified
子类别：	Switching Regulator or Controllers	表面贴装：	YES
最大切换频率：	108 kHz	技术：	BICMOS
温度等级：	OTHER	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	Base Number Matches：	1

SG6849-100T 数据手册

Product Specification

Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback

SG6849

FEATURES

DESCRIPTION

ꢀ

Linearly Decreasing PWM Frequency

This highly integrated PWM controller 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 and zero-load conditions. This

green-mode function enables the power supply to easily

meet international power conservation requirements. The

supply voltage V_DDis also used for feedback

compensation, to regulate the output voltage without

requiring a conventional TL431 and a photo-coupler.

Another advantage of the SG6849 is that the typical

startup current is only 5uA, while the typical operating

current can be as low as 3.6mA. A large startup resistance

could be used to achieve even higher power conversion

efficiency. Built-in synchronized slope compensation

maintains the stability of peak current-mode control.

Proprietary internal compensation ensures constant output

power limiting over a universal range of AC input

voltages, from 90VAC to 264VAC.The SG6849 provides

many protection functions. Pulse-by-pulse current

limiting ensures a constant output current, even if a short

circuit occurs. Also, the internal protection circuit will

disable PWM output, if V_DDexceeds 22.7V. The gate

output is clamped at 16.7V to protect the power MOS

from over-voltage damage. The built-in over temperature

protection (OTP) function will shutdown the controller at

150°C with a 20°C hysteresis. The SG6849 is designed to

provide a low-cost total solution for flyback converters. It

is available in a small footprint, 6-pin, SOT-26 package.

Green-Mode under Light-Load and Zero-Load

Conditions

ꢀ

Constant Voltage (CV) and Constant Current (CC)

No Secondary Feedback

Low Startup Current (5uA)

Low Operating Current (3.6mA)

Leading-Edge Blanking

Constant Power Limit

Universal AC Input Range

Synchronized Slope Compensation

150°C OTP Sensor with Hysteresis

V_DDOver Voltage Clamping

Cycle-by-Cycle Current Limiting

Under Voltage Lockout (UVLO)

Fixed PWM Frequency (65kHz/100kHz)

Gate Output Maximum Voltage Clamped at 16.7V

Small SOT-26 Package

APPLICATIONS

Low-power 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, consumer

electronics, and PC 5V standby-power.

Replacements for linear transformers and RCC

SMPS.

ꢀ

TYPICAL IC APPLICATION

V_IN

D_O

R_IN

D₁

C_O

V_O

VDD

W _AUX

GATE

SENSE

GND

C_IN

R_S

- 1 -

www.sg.com.tw

Apr.06, 2004

Version 1.2(IRO33.0026.B1)

12 3 4 5 6 7...15

中文翻译

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与SG6849-100T相关器件

型号	品牌	获取价格	描述	数据表
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,
SG684965TZ	FAIRCHILD	获取价格	Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
SG6858	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6858_09	FAIRCHILD	获取价格	Low-Cost, Green-Mode, PWM Controller for Flyback Converters
SG6858DZ	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6858TZ	FAIRCHILD	获取价格	Low-Cost, Green-Mode PWM Controller for Flyback Converters

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