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參數(shù)資料
| 型號(hào)： | S3843P |
| 廠商： | AUK Corp |
| 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)： | 6/7頁(yè) |
| 文件大小： | 300K |
| 代理商： | S3843P |
KSI-L007-000
6
High peak currents associated with capacitive leads necessitate careful grounding techniques. Timing and bypass
capacitors should be connected close to Pin5 in a single point ground. The transistor and 5
potentiometer are
used to sample the oscillator waveform and apply an adjustable ramp to Pin 3.
A fraction of the oscillator ramp can be resistively
R
T
summed with the current sense signal to provide
slope compensation for converters requiring duty
cycle over 50%. Note that capacitor C, forms a
4
R
T
/C
/C
T
C
T
filter with R
2
to suppress the leading edge switch
spikes.
3
I
SENSE
C
R
SENSE
S3843P
6. Open Loop Test
7. Slope Compensation
I
SENSE
ADJUST
S
V
REF
1
GND
V
REF
I
SENSE
4.7K
COMP
2
3
4
5
6
7
8
Vcc
OUTPUT
GROUND
ADJUST
2N2222
R
T
ERROR
AMP
4.7K
1K
0.1uF
0.1uF
1K/1W
R
T
/C
T
Vin
Vcc
OUTPUT
100K
I
SENSE
0.1uF
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