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參數(shù)資料
| 型號： | NCP1215ADR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Cost Variable OFF Time Switched Mode Power Supply Controller |
| 中文描述： | SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 159K |
| 代理商： | NCP1215ADR2G |
NCP1215A
http://onsemi.com
13
Figure 24 shows CT voltage and also by Channel 2 the
switch’s drain voltage at light load conditions.
Figure 24. CT and Drain at Light Load
The waveform on the current sense pin at full load
conditions can be observed from Channel 3 in Figure 25.
Figure 25. CS Pin at Full Load Condition
Figure 26 demonstrates the reduction of the peak primary
current at light load conditions.
Figure 26. CS Pin at Light Load Condition
GateSource Resistor Design Guidelines
In some applications, there is a need to wire a resistor
between the MOSFET gate and source connections. This
can preclude an eventual MOSFET destruction if, in the
production stage, the converter is powered whilst the gate is
left unconnected. However, dealing with an extremely low
startup current implies a careful selection of the gatesource
resistance. With the NCP1215A, the gatesource resistor
must be calculated to allow the growth of the V
CC
capacitor
to 4.0 V in order to not interfere with the poweron
sequence. The following equation helps deriving
R
gatesource
, accounting for the minimum rectified input
voltage
and
the
startup
R
gatesource
/(R
gatesource
+ R
startup
)
Vin
min
of 100 VDC, a startup resistor of 4.0 M , then
R
gatesource
equals 180 k as a minimum normalized value.
resistor:
4.0 V. If we take a
Vin
min
x
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| NCP1215ASNT1 | Low Cost Variable OFF Time Switched Mode Power Supply Controller |
| NCP1215ASNT1G | Low Cost Variable OFF Time Switched Mode Power Supply Controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1215ASNT1 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Low Cost Variable RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| NCP1215ASNT1G | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Low Cost Variable Off SMPS RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| NCP1215-D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NCP1215 Datasheet |
| NCP1215DR2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 ANA VARIABL OFF TIME SMPS RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| NCP1215DR2G | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 ANA VARIABL OFF TIME SMPS RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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