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參數資料
| 型號： | SG6902SZ |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Green-Mode PFC / Flyback-PWM Controller |
| 中文描述： | POWER FACTOR CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 0.300 INCH, ROHS COMPLIANT, MS-013AC, SOP-20 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 863K |
| 代理商： | SG6902SZ |
Product Specification
Green-Mode PFC / Flyback-PWM Controller
FEATURES
Green-mode PFC and PWM operation
No switching of PFC at light loads saves power
Low start-up and operating current
Innovative switching-charge multiplier-divider
Multi-vector control for improved PFC output
transient response
Interleaved PFC/PWM switching
Programmable two-level PFC output voltage
Average-current-mode control for PFC
Cycle-by-cycle current limiting for PFC/PWM
PFC over-voltage and under-voltage protections
PFC and PWM feedback open-loop protection
Brownout protection
Over-temperature protection
APPLICATIONS
Switching Power Supplies with Active PFC
High-Power Adaptors
DESCRIPTION
The highly integrated SG6902 is designed for power
supplies with boost PFC and Flyback PWM. It
requires very few external components to achieve
green-mode operation and versatile protections. It is
available in a 20-pin SOP package.
SG6902
System General Corp.
Version 1.3.1 (IAO33.0022.B3)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September, 2007
The
synchronizes the PFC and PWM stages and reduces
switching noise. At light loads, the switching
frequency is continuously decreased to reduce power
consumption. If output loading is further reduced, the
PFC stage is turned off to further reduce power
consumption.
patented
interleave-switching
feature
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 SG6902 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
Built-in line-voltage compensation maintains a
constant output power limit. Hiccup operation during
output overloading is also guaranteed.
operation.
In addition, SG6902 provides protection functions,
such as brownout and RI pin open/short protections.
TYPICAL APPLICATION
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| SG6961 | Power Factor Controller |
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| SG6961SZ | Power Factor Controller |
| SG6980DZ | Single-Stage PFC Controller |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| 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:開關變換器、穩壓器與控制器 Grn Mode PFC/Forward 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 |
| SG6931DZ | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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