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參數資料
型號: SG6858TZ
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩壓器
英文描述: Low-Cost, Green-Mode PWM Controller for Flyback Converters
中文描述: SWITCHING CONTROLLER, 75 kHz SWITCHING FREQ-MAX, PDSO6
封裝: GREEN, MO-193AA, SSOT-26, 6 PIN
文件頁數: 1/13頁
文件大小: 512K
代理商: SG6858TZ
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
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
SG6901A PFC / Flyback PWM Controller
SG6901ASZ PFC / Flyback PWM Controller
相關代理商/技術參數
參數描述
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
SG6859A_10 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859ADY 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low-Cost, Green-Mode PWM Controller for Flyback Converters
SG6859ADZ 功能描述:電流型 PWM 控制器 Current Mode PWM Controller 8-Pin 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
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