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參數資料
| 型號： | SG5841 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Highly Integrated Green-Mode PWM Controller |
| 中文描述： | 高度集成的綠色模式PWM控制器 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 506K |
| 代理商： | SG5841 |
Product Specification
Highly Integrated Green-Mode PWM Controller
FEATURES
Green-Mode PWM Controller
Low Start-Up Current (14μA)
Low Operating Current (4mA)
Programmable PWM Frequency with Hopping
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Synchronized Slope Compensation
Leading-Edge Blanking
Constant Output Power Limit
Totem Pole Output with Soft Driving
V
DD
Over-Voltage Clamping
Programmable Over-Temperature Protection (OTP)
Internal Open-Loop Protection
V
DD
Under-Voltage Lockout (UVLO)
GATE Output Maximum Voltage Clamp (18V)
APPLICATIONS
SG5841/J
System General Corp.
Version 1.3.1 (IAO33.0017.B6)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 20, 2007
General-purpose switch-mode power supplies and
flyback power converters, including:
Power Adapters
Open-Frame SMPS
DESCRIPTION
The highly integrated SG5841/J series of PWM
controllers provides several features to enhance the
performance of flyback converters.
To minimize standby power consumption, a proprietary
green-mode function provides off-time modulation to
continuously decrease the switching frequency at
light-load conditions. This green-mode function enables
the power supply to meet international power
conservation requirements. To further reduce power
consumption, SG5841/J is manufactured using the
BiCMOS process. This allows a low start-up current,
around 14μA, and an operating current of only 4mA. As a
result, a large start-up resistance can be used.
The SG5841/J built-in synchronized slope compensation
achieves
stable
peak-current-mode
proprietary internal sawtooth power-limiter ensures
constant output power limit over a wide range of AC input
voltages, from 90VAC to 264VAC.
control.
The
SG5841/J provides many protection functions. In addition
to cycle-by-cycle current limiting, the internal open-loop
protection circuit ensures safety should an open-loop or
output-short-circuit failure occur. PWM output is disabled
until V
DD
drops below the UVLO lower limit, then the
controller starts again. An external NTC thermistor can be
applied for over-temperature protection.
SG5841/J is available in an 8-pin DIP or SOP package.
TYPICAL APPLICATION
SG5841/J
相關PDF資料 |
PDF描述 |
|---|---|
| SG5841DZ | Highly Integrated Green-Mode PWM Controller |
| SG5841J | Highly Integrated Green-Mode PWM Controller |
| SG5841JSZ | Highly Integrated Green-Mode PWM Controller |
| SG5841SZ | Highly Integrated Green-Mode PWM Controller |
| SG5842ASZ | Highly Integrated Green-Mode PWM Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SG5841CDZ | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG5841CSZ | 功能描述:電流型 PWM 控制器 Green-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 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| SG5841DY | 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 輸出端數量:1 拓撲結構: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 |
| SG5841DZ | 功能描述:開關變換器、穩壓器與控制器 Highly-Integrated Grn Mode PWM Cntrl RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SG5841J | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
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