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February 2009
?2008 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
SG6901A " Rev. 1.0.2
 
SG6901A
CCM PFC/Flyback PWM Combination Controller
 
Features
    Interleaved PFC/PWM Switching 
    Low Startup and Operating Current 
    Innovative Switching Charge Multiplier Divider 
    Multi-vector Control for Improved PFC Output 
Transient Response
    Average-Current-Mode Control for PFC 
    Programmable Two-Level PFC Output Voltage 
Protections
    PFC and PWM Feedback Open-Loop Protection 
    Cycle-by-Cycle Current Limiting for PFC/PWM 
    Slope Compensation for PWM 
    H/L Line Over-Power Compensation for PWM 
    Brownout Protection 
    Over-Temperature Protection (OTP) 
Applications
    Switching Power Supplies with Active PFC and 
Standby Power
    High-Power Adaptors 
Description
The highly integrated SG6901A is designed for power
supplies with boost PFC and flyback PWM. It requires
very few external components to achieve versatile
protections. It is available in a 20-pin SOP package.
A proprietary interleave-switching feature synchronizes
the PFC and PWM stages and reduces switching noise.
For PFC stage, the proprietary multi-vector control
scheme provides a fast transient response in a low-
bandwidth PFC loop, in which the overshoot and
undershoot of the PFC voltage are clamped. If the
feedback loop is broken, the SG6901A shuts off PFC to
prevent extra-high voltage on output.
For   the   flyback   PWM,   the   synchronized   slope
compensation ensures the stability of the current loop
under continuous-conduction-mode operation. Built-in
line-voltage compensation maintains constant output-
power limit. Hiccup operation during output overloading
is also guaranteed.
In addition, SG6901A provides protection functions,
such as brownout and RI pin open/short protection.
 
 
Ordering Information
Part Number
Operating
Temperature Range
 Eco 
Status
Package
Packing
Method
SG6901ASZ
-30癈 to +85癈
RoHS
20-Lead, Small Outline Integrated 
Circuit (SOIC), JEDEC
MS013, .300 inch, Wide Body 
Tape & Reel
 For Fairchilds definition of green Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html
.
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相关代理商/技术参数
SG6902 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Green-Mode PFC / Flyback-PWM Controller
SG6902SZ 功能描述:开关变换器、稳压器与控制器 Grn Mode PFC/Flyback PWM Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel
SG6903SZ 功能描述:开关变换器、稳压器与控制器 Highly-Integrated Grn Mode PWM Cntrl RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel
SG6905 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Green mode PFC/Flyback-PWM Controller
SG6905SY 制造商:Rochester Electronics LLC 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述:
SG6905SZ 功能描述:开关变换器、稳压器与控制器 Grn Mode PFC/Forward PWM Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel
SG6931DZ 制造商:Fairchild Semiconductor Corporation 功能描述:
SG6932 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:PFC / Forward PWM Controller