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參數資料
| 型號： | SG6858 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Low-Cost, Green-Mode PWM Controller for Flyback Converters |
| 中文描述： | 低成本，綠色模式PWM控制器，用于回掃轉換 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 512K |
| 代理商： | SG6858 |
Product Specification
Low-Cost, Green-Mode PWM Controller for Flyback Converters
FEATURES
Green-mode PWM
Supports the “Blue Angel” standard
Low start-up current (10μA)
Low operating current (2.5mA)
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
V
DD
over-voltage protection (auto restart)
Gate output voltage clamped at 17V
Low cost
Few external components required
Small SOT-26 and DIP-8 packages
APPLICATIONS
SG6858
System General Corp.
Version 1.2.1 (IAO33.0045.B2)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 25, 2007
General-purpose, switching-mode power supplies and
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
auxiliary supplies, home appliances, and consumer
electronics
Replacements for linear transformers and RCC SMPS
PC 5V standby power
TYPICAL APPLICATION
DESCRIPTION
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 meet
even the strictest power conservation requirements.
The BiCMOS fabrication process enables reducing the
start-up current to 10μA and the operating current to
2.5mA. 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 (90V
AC
to 264V
AC
). Pulse-by-pulse current limiting
ensures safe operation even during short-circuits.
To protect the external power MOSFET from being
damaged by supply over-voltage events, the SG6858’s
output driver is clamped at 17V. SG6858 controllers can
be used to improve the performance and reduce the
production cost of power supplies and can replace linear
and RCC-mode power adapters. It is available in 8-pin
DIP and 6-pin SOT-26 packages.
相關PDF資料 |
PDF描述 |
|---|---|
| SG6858DZ | Low-Cost, Green-Mode PWM Controller for Flyback Converters |
| SG6858TZ | Low-Cost, Green-Mode PWM Controller for Flyback Converters |
| SG6859 | Low Cost Green-Mode PWM Controller for Flyback Converters |
| SG6859DZ | Low Cost Green-Mode PWM Controller for Flyback Converters |
| SG6859TZ | Low Cost Green-Mode PWM Controller for Flyback Converters |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SG6858_09 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low-Cost, Green-Mode, PWM Controller for Flyback Converters |
| SG6858DZ | 功能描述:開關變換器、穩壓器與控制器 Low Cost 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 |
| SG6858TZ | 功能描述:IC CTRLR PWM PROG GREEN CM 6SSOT RoHS:是 類別:集成電路 (IC) >> PMIC - AC-DC 轉換器，離線開關 系列:- 標準包裝:3,000 系列:- 輸出隔離:隔離 頻率范圍:61kHz ~ 71kHz 輸入電壓:9.4 V ~ 28 V 輸出電壓:12V 功率（瓦特）:- 工作溫度:-40°C ~ 125°C 封裝/外殼:SC-74，SOT-457 供應商設備封裝:6-TSOP 包裝:帶卷 (TR) |
| SG6859 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low Cost Green-Mode PWM Controller for Flyback Converters |
| SG6859A | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low-Cost, Green-Mode PWM Controller for Flyback Converters |
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