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參數(shù)資料
| 型號(hào)： | ML4812IP |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Power Factor Controller |
| 中文描述： | 1 A POWER FACTOR CONTROLLER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁(yè)數(shù)： | 5/16頁(yè) |
| 文件大?。?/td> | 348K |
| 代理商： | ML4812IP |
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ML4812
REV. 1.0 10/10/2000
5
FUNCTIONAL DESCRIPTION
OSCILLATOR
The ML4812 oscillator charges the external capacitor (C
T
)
with a current (I
SET
) equal to 5/R
SET
. When the capacitor
voltage reaches the upper threshold, the comparator
changes state and the capacitor discharges to the lower
threshold through Q1. While the capacitor is discharging,
Q2 provides a high pulse.
The Oscillator period can be described by the following
relationship:
Figure 2. Oscillator Timing Resistance vs. Frequency
Figure 1. Oscillator Block Diagram
Figure 3. Output Saturation Voltage vs. Output Current
10
SYNC
Q
2
Q
1
9
RT
16
CT
EXTERNAL
CLOCK
+
-
5.6V
ISET
8.4mA
CT
RT
ISET
CSYNC
RSYNC
CLOCK
tD
RAMP VALLEY
RAMP PEAK
V(CT)
10
R
)
OSCILLATOR FREQUENCY (kHz)
10
100
1000
8
5
3
2
1
M
10nF
20nF
5nF
2nF
1nF
85%
80%
70%
90%
15
14
13
3
2
1
0
O
OUTPUT CURRENT (mA)
0
200
400
800
600
VCC
VCC = 15V
80μs PULSED LOAD
120Hz RATE
GND
SOURCE SATURATION
LOAD TO GROUND
SINK SATURATION
LOAD TO VCC
where:
and:
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4812IQ | 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 |
| ML4812IQ_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 |
| ML4812IQX | 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 |
| ML4813 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Flyback Power Factor Controller |
| ML4813CP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Flyback Power Factor Controller |
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