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參數資料
| 型號： | SG6901A |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | PFC / Flyback PWM Controller |
| 中文描述： | 功率因數校正/反激式PWM控制器 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 716K |
| 代理商： | SG6901A |
Product Specification
PFC / Flyback PWM Controller
FEATURES OVERVIEW
Interleaved PFC/PWM switching
Low start-up 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
PFC over-voltage and under-voltage protections
PFC and PWM feedback open-loop protection
Cycle-by-cycle current limiting for PFC/PWM
Slope compensation for PWM
Constant power limit for PWM
Brownout protection
Over-temperature protection (OTP)
APPLICATIONS
Switching Power Supplies with Active PFC and
Standby Power
High-Power Adaptors
DESCRIPTION
SG6901A
System General Corp.
Version 1.0.1 (IAO33.0062.B0)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 26, 2007
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.
The patented 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. Programmable
two-level output voltage control reduces the PFC output
voltage at low line input to increase the efficiency of the
power supply.
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
output-power limit. Hiccup operation during output
overloading is also guaranteed.
maintains
constant
In addition, SG6901A provides protection functions, such
as brownout and RI pin open/short protection.
Typical Application
相關PDF資料 |
PDF描述 |
|---|---|
| SG6901ASZ | PFC / Flyback PWM Controller |
| SG6902 | Green-Mode PFC / Flyback-PWM Controller |
| SG6902SZ | Green-Mode PFC / Flyback-PWM Controller |
| SG6961 | Power Factor Controller |
| SG6961DZ | Power Factor Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SG6901ASZ | 功能描述:開關變換器、穩壓器與控制器 PFC/Flyback PWM Controller 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 |
| SG6902 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green-Mode PFC / Flyback-PWM Controller |
| SG6902SZ | 功能描述:開關變換器、穩壓器與控制器 Grn Mode PFC/Flyback PWM Controller 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 |
| SG6903SZ | 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 |
| SG6905 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green mode PFC/Flyback-PWM Controller |
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