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參數(shù)資料
| 型號： | NCP1200 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
| 中文描述： | PWM電流模式控制器的低功耗通用離線用品 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 151K |
| 代理商： | NCP1200 |
NCP1200
http://onsemi.com
13
Improving the Output Drive Capability
The NCP1200 features an asymmetrical output stage used
to soften the EMI signature. Figure 25 depicts the way the
driver is internally made:
V
CC
2
3
1
5
7
Q
Q\
Figure 25. The higher ON resistor slows down
the MOSFET while the lower OFF resistor
ensures fast turnoff.
40
12
In some cases, it is possible to expand the output drive
capability by adding either one or two bipolar transistors.
Figures 26, 27, and 28 give solutions whether you need to
improve the turnon time only, the turnoff time or both. Rd
is there to damp any overshoot resulting from long copper
traces. It can be omitted with short connections. Results
showed a rise fall time improvement by 5X with standard
2N2222/2N2907:
NCP1200
1
2
3
4
8
7
6
5
2N2907
2N2222
To Gate
Rd
Figure 26. Improving Both TurnOn and
TurnOff Times
NCP1200
1
2
3
4
8
7
6
5
2N2907
1N4148
To Gate
Figure 27. Improving TurnOff Time Only
6
NCP1200
1
2
3
4
8
7
5
2N2222
To Gate
1N4148
Figure 28. Improving TurnOn Time Only
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| NCP1200D100R2 | PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
| NCP1200D100R2G | PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
| NCP1200D40R2 | PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
| NCP1200P40 | PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1200/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
| NCP1200_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current−Mode Controller for Low−Power Universal Off−Line Supplies |
| NCP1200_09 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies |
| NCP1200A | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power |
| NCP1200A/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power |
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