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參數(shù)資料
| 型號： | SG6961 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Power Factor Controller |
| 中文描述： | 功率因數(shù)控制器 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 582K |
| 代理商： | SG6961 |
Product Specification
Power Factor Controller
SG6961
System General Corp.
Version 1.3.1 (IRO33.0028.B6)
- 9 -
www.sg.com.tw www.fairchildsemi.com
September 24, 2007
Zero Current Detection
The zero current detection of the inductor is achieved
using its auxiliary winding. When the stored energy of
the inductor is fully released to output, the voltage on
ZCD goes down and a new switching cycle is enabled
after a ZCD trigger. The power MOSFET is always
turned on with zero inductor current, such that turn-on
loss and noise can be minimized. The converter works
in boundary mode, such that the peak inductor current is
always exactly twice of the average current. Moreover,
a natural power factor correction function is achieved
with the low-bandwidth on time modulation. An
inherent maximum off-time is built in to ensure proper
start-up operation. In addition, this pin can be used as a
synchronous input.
Noise Immunity
Noise on the current sense or control signal can cause
significant pulse-width jitter, particularly in the
boundary-mode operation. Slope compensation and
built-in debounce circuitry alleviate this problem. Note
that the SG6961 has a single ground pin; therefore, high
sink current at the output cannot be returned separately.
Good high-frequency or RF layout practices should be
followed. Avoid long PCB traces and component leads.
Locating compensation and filter components near to
the SG6961 and increasing the power MOSFET gate
resistance improve performance.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SG6961DZ | Power Factor Controller |
| SG6961SZ | Power Factor Controller |
| SG6980DZ | Single-Stage PFC Controller |
| SG6980SZ | Single-Stage PFC Controller |
| SG6980 | Single-Stage PFC Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SG6961BSTA_DBB14 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG6961DZ | 功能描述:功率因數(shù)校正 IC Grn Mode PFC/Forward PWM Controller RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| SG6961SY | 功能描述:功率因數(shù)校正 IC Power Factor Controller RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| SG6961SZ | 功能描述:功率因數(shù)校正 IC Power Factor Controller RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| SG6980 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Single-Stage PFC Controller |
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