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參數(shù)資料
| 型號(hào)： | ML4819CP |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Power Factor and PWM Controller “Combo” |
| 中文描述： | 1 A POWER FACTOR CONTROLLER WITH POST REGULATOR, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大小： | 269K |
| 代理商： | ML4819CP |
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–
R
T
I
SENSE
B
I
SENSE
A
INV A
OVP
EA OUT A
–
–
I
SINE
RAMP COMP
C
T
ERROR
AMP
+
5V
I
EA
OSC
SLOPE
COMPENSATION
UNDER
VOLTAGE
LOCKOUT
R
Q
R
Q
DUTY CYCLE
I
LIM
PWM B
OUT B
PGND B
PGND A
V
REF
V
CC
V
CC
V
CC
GND
OUT A
GM OUT
5V
5V
0.7V
1V
10
20
12
7
11
9
8
14
18
17
16
15
13
1
3
5
6
19
GAIN MODULATOR
PWM
CONTROLLER
POWER FACTOR
CONTROLLER
+
–
+
–
+
–
+
–
Pes SeM42 o NwDsgs
May 1997
ML4819
Power Factor and PWM Controller “Combo”
GENERAL DESCRIPTION
The ML4819 is a complete boost mode Power factor
Controller (PFC) which also contains a PWM controller.
The PFC circuit is similar to the ML4812 while the PWM
controller can be used for current or voltage mode control
for a second stage converter. Since the PWM and PFC
circuits share the same oscillator, synchronization of the
two stages is inherent. The outputs of the controller IC
provide high current (>1A peak) and high slew rate to
quickly charge and discharge MOSFET gates. Special care
has been taken in the design of the ML4819 to increase
system noise immunity.
The PFC section is of the peak current sensing boost type,
using a current sense transformer or current sensing
MOSFETs to non-dissipatively sense switch current. This
gives the system overall efficiency over average current
sensing control method.
The PWM section includes cycle by cycle current limiting,
precise duty cycle limiting for single ended converters,
and slope compensation.
BLOCK DIAGRAM
FEATURES
I
Two 1A peak current totem-pole output drivers
I
Precision buffered 5V reference (
±
1%)
I
Large oscillator amplitude for better noise immunity
I
Precision duty cycle limit for PWM section
I
Current input gain modulator improves noise immunity
I
Programmable Ramp Compensation circuit
I
Over-Voltage comparator helps prevent output
“runaway”
I
Wide common mode range in current sense
compensators for better noise immunity
I
Under-Voltage Lockout circuit with 6V hysteresis
REV. 1.0 10/10/2000
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4821 | Power Factor Controller |
| ML4821CP | Power Factor Controller |
| ML4821CS | Power Factor Controller |
| ML4822 | 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) |
| ML4823 | High Frequency PWM Controller(高頻PWM控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4819CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Power Factor and PWM Controller Combo |
| ML4821 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Power Factor Controller |
| ML482-1 | 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR 102KG 4" SWIVEL/BRAK 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 102KG, 4", SWIVEL/BRAKE 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 102KG, 4", SWIVEL/BRAKE, For Use With:Industrial and Material Handling Applications, Carrying Capacity:102kg, Wheel Diameter:100mm , RoHS Compliant: NA |
| ML4821CP | 功能描述:功率因數(shù)校正 IC PFC Controller RoHS:否 制造商:Fairchild Semiconductor 開(kāi)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 |
| ML4821CP_Q | 功能描述:功率因數(shù)校正 IC PFC Controller RoHS:否 制造商:Fairchild Semiconductor 開(kāi)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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