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參數(shù)資料
| 型號： | AIC3843CNTR |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Current-Mode PWM Controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大小： | 189K |
| 代理商： | AIC3843CNTR |
AIC3843
8
Slope compensation
AIC3843
0.1
μ
F
R2
C
R
SENSE
Fig. 8
A fraction of the oscillator ramp can be
resistively summed with the current sense
signal to proved slope compensation for
converters requiring duty cycles over 50%
Note that capacitor, C forms a filter with R2 to
suppress the leading edge switch spikes.
V
REF
I
SENSE
C
T
R
T
/C
T
I
SENSE
R1
R
T
8
4
3
n
BLOCK DIAGRAM
8
6
R
S
VCC
GND
V
REF
5V/50mA
COMP
OUTPUT
VFB
ISENSE
RT/CT
VREF
Good
Logic
UVLO
PWM
Latch
OSC
ZD
34V
Current
Sense
comparator
Internal Bias
Error Amp.
+
-
D1
Z1
1V
D2
2R
2.50V
S/R
5V
REF
Q2
Q1
7
5
4
1
2
3
R
T
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