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參數(shù)資料
| 型號(hào)： | CM3843CS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 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)： | 8/12頁 |
| 文件大小： | 638K |
| 代理商： | CM3843CS |
CM3842/3843
C
URRENT
M
ODE
PWM C
ONTROLLER
2001/06/27
Advanced
Champion Microelectronic Corporation
Page 7
APPLICATION INFORMATION
(continued)
Fig. 5. Shutdown Techniques -
there are two ways to shutdown the PWM controller: 1) raise the voltage at
I
SENSE
above 1V or, 2) pull the COMP below a voltage two diodes above ground.
Fig 6. Slop Compensation –
To achieve duty cycles over 50% for some applications , the above
slope compensation technique is suggested by resistively summing a fraction of the
oscillator ramp with the current sense signal.
I
SENSE
Shutdown
V
REF
500
To Current
Sense Resistor
330
1K
Shutdown
COMP
V
REF
R
T
/C
T
I
SENSE
R
T
C
T
0.1
μ
F
C
R
2
R
1
I
SENSE
R
SENSE
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