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| 型号： | SG6841SZ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBACK PWM 8-SOIC |
| 产品变化通告： | Mold Compound Change 12/Dec/2007 |
| 标准包装： | 2,500 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 70kHz |
| 占空比： | 90% |
| 电源电压： | 10 V ~ 20 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -20°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
Product Specification
High-integrated Green-mode PWM Controller
FEATURES
Green-mode PWM to support “Blue Angel” Norm
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
APPLICATIONS
General-purpose switching mode power supplies
and flyback power converters, and
Power Adapter
Open-frame SMPS
Battery Charger Adapter
SG6841
DESCRIPTION
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.
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
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
RIN
VIN
RT
VDD
GATE
C IN
D1
Rg
From auxiliary
winding
Q1
RA
RT
RI
RI
SG6842
SENSE
R S
FB
GND
?System General Corp.
Version 2.1 (IRO33.0001.B5)
-1-
www.sg.com.tw
Jun.15,2006
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SG6841SZ3 | 功能描述:电压模式 PWM 控制器 HI-INTEGRD GRN-MODE PWM CONTROLLER RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SG6842BLVDZ | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG6842BLVSY | 功能描述:电流型 PWM 控制器 Current Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SG6842BLVSZ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG6842JLDZ | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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