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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 5/11頁(yè) |
| 文件大小： | 189K |
| 代理商： | AIC3843CNTR |
AIC3843
5
Error AMP Configuration
Z
F
1
2
+
-
V
FB
COMP
0.5mA
2.50V
Error Amp can Source or Sink up to 0.5mA
Fig. 1
Z
I
Under-Voltage Lockout
7
V
ON
V
OFF
AIC3843
8.4V
7.6V
17mA
500
μ
A
V
OFF
V
ON
V
CC
I
CC
During under-voltage lockout, the output driver is biased to sink minor amounts of
current. Pin 6 should be shunted to ground with a bleeder resistor to prevent
activating the power switch with extraneous leakage currents.
Fig. 2-1
Fig. 2-2
Current Sense Circuit
R
C
R
S
I
S
2R
R
1V
GND
Current Sense
COMP
Error AMP
Current Sense
Comparator
Peak Current (Is) is Determined By The Formula
I
SMAX
≈
1.0V
R
S
A small RC filter may be required to suppress switch transients.
Fig. 3
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