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參數(shù)資料
| 型號(hào)： | FAN4822 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | ZVS Average Current PFC Controller |
| 中文描述： | 零電壓平均電流PFC控制器 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 71K |
| 代理商： | FAN4822 |
www.fairchildsemi.com
REV. 1.0.1 8/10/01
Features
Average current sensing, continuous boost, leading edge
PFC for low total harmonic distortion and near unity
power factor
Built-in ZVS switch control with fast response for high
efficiency at high power levels
Average line voltage compensation with brownout control
Current fed gain modulator improves noise immunity and
provides universal input operation
Overvoltage comparator eliminates output “runaway” due
to load removal
UVLO, current limit, and soft-start
Precision 1.3% reference
General Description
The FAN4822 is a PFC controller designed specifically for
high power applications. The controller contains all of the
functions necessary to implement an average current boost
PFC converter, along with a Zero Voltage Switch (ZVS) con-
troller to reduce diode recovery and MOSFET turn-on
losses.
The average current boost PFC circuit provides high power
factor (>98%) and low Total Harmonic Distortion (THD).
Built-in safety features include undervoltage lockout, over-
voltage protection, peak current limiting, and input voltage
brownout protection.
The ZVS control section drives an external ZVS MOSFET
which, combined with a diode and inductor, soft switches the
boost regulator. This technique reduces diode reverse recov-
ery and MOSFET switching losses to reduce EMI and maxi-
mize efficiency.
Block Diagram
Q
S
R
–
+
1
14
VEAO
VEA
2.5V
FB
4
I
AC
5
V
RMS
+
–
3
I
SENSE
8
GND
2
IEAO
+
–
IEA
R+
R
–
+
–
–
6
R
T
C
T
OSC
GAIN
MODULATOR
S
R
Q
+
–
2.7V
FB
–
1V
12
V
CC
V
CCZ
13.5V
ZVS OUT
11
Q
S
R
Q
PFC OUT
9
PWR GND
10
OVP
I LIMIT
REF
13
ZV SENSE
7
+
V
CCZ
REF
Q
FAN4822
ZV S Average Current PFC Controller
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| FAN4855MTC | 500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN4822IM | 功能描述:功率因數(shù)校正 IC PFC 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 |
| FAN4822IM_Q | 功能描述:功率因數(shù)校正 IC PFC 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 |
| FAN4822IMX | 功能描述:功率因數(shù)校正 IC PFC 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 |
| FAN4822IN | 功能描述:功率因數(shù)校正 IC PFC 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 |
| FAN4822IN_Q | 功能描述:功率因數(shù)校正 IC PFC 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 |
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