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參數(shù)資料
| 型號： | ML4822 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | ZVS Average Current PFC Controller(零電壓轉(zhuǎn)換和平均電流轉(zhuǎn)換的功率因數(shù)控制器) |
| 中文描述： | 零電壓平均電流PFC控制器（零電壓轉(zhuǎn)換和平均電流轉(zhuǎn)換的功率因數(shù)控制器） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 117K |
| 代理商： | ML4822 |
May 1997
ML4822
ZVS Average Current PFC Controller
GENERAL DESCRIPTION
The ML4822 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) controller 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, overvoltage 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
recovery and MOSFET switching losses to reduce EMI and
maximize efficiency.
FEATURES
I
Average current sensing, continuous boost, leading
edge PFC for low total harmonic distortion and near
unity power factor
I
Built-in ZVS switch control with fast response for high
efficiency at high power levels
I
Average line voltage compensation with brownout
control
I
Current fed gain modulator improves noise immunity
and provides universal input operation
I
Overvoltage comparator eliminates output “runaway”
due to load removal
I
UVLO, current limit, and soft-start
I
Precision 1% reference
BLOCK DIAGRAM
(Pin configuration shown for 14-pin package)
Q
S
R
–
+
1
14
VEAO
VEA
2.5V
FB
4
IAC
5
VRMS
+
–
3
ISENSE
8
GND
2
IEAO
+
–
IEA
R+
R–
+
–
–
6
RTCT
OSC
GAIN
MODULATOR
S
R
Q
+
–
2.7V
FB
–1V
12
VCC
VCCZ
13.5V
ZVS OUT
11
Q
S
R
Q
PFC OUT
9
PWR GND
10
OVP
I LIMIT
REF
13
ZV SENSE
7
+
VCCZ
REF
Q
REV. 1.0 10/12/2000
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4823 | High Frequency PWM Controller(高頻PWM控制器) |
| ML4823IQ | High Frequency Power Supply Controller |
| ML4823CP | High Frequency Power Supply Controller |
| ML4823CQ | High Frequency Power Supply Controller |
| ML4823CS | High Frequency Power Supply Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4822CP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4822CS | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4822CSX | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4822IP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:ZVS Average Current PFC Controller |
| ML4822IS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:ZVS Average Current PFC Controller |
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