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參數(shù)資料
| 型號： | SG6841S |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | High-integrated Green-mode PWM Controller |
| 中文描述： | 高集成度綠色模式PWM控制器 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 357K |
| 代理商： | SG6841S |
Product Specification
High-integrated Green-mode PWM Controller
SG6841
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
System General Corp. - 1 - www.sg.com.tw
Version 1.7 (IRO33.0001.B1) JUL.25,2003
General-purpose switching mode power supplies
and flyback power converters, and
Power Adapter
Open-frame SMPS
Battery Charger Adapter
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
SG6842
From auxiliary
winding
FB
GATE
SENSE
GND
VIN
RIN
Rg
R
S
From bridge rectifier
127~ 373VDC
C
IN
RA
RI
RT
Q1
RT
RI
VDD
D1
相關PDF資料 |
PDF描述 |
|---|---|
| SG6846LD | Highly-Integrated Green-Mode PWM Controller |
| SG6846LDZ | Highly-Integrated Green-Mode PWM Controller |
| SG6846CS | Highly-Integrated Green-Mode PWM Controller |
| SG6846CSZ | Highly-Integrated Green-Mode PWM Controller |
| SG6846LS | Highly-Integrated Green-Mode PWM Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SG6841SZ | 功能描述:電壓模式 PWM 控制器 HI-INTEGRD GRN-MODE PWM CONTROLLER RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| SG6841SZ3 | 功能描述:電壓模式 PWM 控制器 HI-INTEGRD GRN-MODE PWM CONTROLLER RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| SG6842BLVDZ | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG6842BLVSY | 功能描述:電流型 PWM 控制器 Current Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| SG6842BLVSZ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述: |
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