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參數(shù)資料
| 型號： | LM3842A |
| 廠商： | TAEJIN Technology Co., Ltd. |
| 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)： | 3/7頁 |
| 文件大小： | 121K |
| 代理商： | LM3842A |
CURRENT MODE PWM CONTROLLER
LM3842A/3A/4A/5A
Fig.1 Open Loop Test Circuit
High peak currents associated with capacitive loads necessitate careful grounding techniques
Timing and bypass capacitors should be connected close to pin 5 in a single point ground.
The transistor and 5KΩ potentiometer are used to sample the oscillator waveform and apply an
adjustable ramp to pin 3.
Fig.2 Under Voltage Lockout
LM3842A
LM3843A/5A
V
ON
16V
8.4V
V
OFF
10V
7.6V
During Under-Voltage Lock-Out, the output driver is biased to a high impedance state.
Pin 6 should be shunted to ground with a bleeder resistor to prevent activating the power switch
with output leakage current.
Fig.3 Error Amp Configuration
HTC
3
1
2
3
4
8
7
6
5
COMP
V
REF
V
FB
V
C
OUTPUT
GND
I
SENSE
R
T
/C
T
LM3842A
0.1
0.1
A
C
T
OUTPUT
1K/1W
V
REF
V1
R
T
100K
2N
2222
4.7K
1K
5K
I
SENSE
ADJUST
4.7K
E/A
ADJUST
Error amp can source or sink up to 0.5mA
2
1
-
+
Zi
Zf
COMP
V
FB
0.5mA
2.5V
7
ON/OFF COMMAND
TO REST OF IC
< 15mA
< 1mA
V
OFF
V
ON
V
CC
I
CC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LM3842A_08 | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:CURRENT MODE PWM CONTROLLER |
| LM3842AD | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:CURRENT MODE PWM CONTROLLER |
| LM3842AN | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:CURRENT MODE PWM CONTROLLER |
| LM3843A | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:CURRENT MODE PWM CONTROLLER |
| LM3843AD | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:CURRENT MODE PWM CONTROLLER |
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