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參數資料
| 型號： | NCP1215 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Low Cost Variable OFF Time Switched Mode Power Supply Controller |
| 中文描述： | 低成本可變關閉時間開關電源控制器 |
| 文件頁數： | 13/16頁 |
| 文件大小： | 148K |
| 代理商： | NCP1215 |
NCP1215
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 NCP1215, 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 Rgatesource,
accounting for the minimum rectified input voltage and the
startup resistor: Vin
min
x Rgatesource/(Rgatesource +
Rstartup)
4.0 V. If we take a Vin
min
of 100 VDC, a startup
resistor of 4.0 M , then Rgatesource equals 180 k as a
minimum normalized value.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| NCP1215A | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Power Factor Controllers |
| NCP1215AADAPGEVB | 功能描述:插座和適配器 NCP1215 5 W ADAPTER EVB RoHS:否 制造商:Silicon Labs 產品:Adapter 用于:EM35x |
| NCP1215ADR2 | 功能描述:交流/直流開關轉換器 Low Cost Variable RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| NCP1215ADR2G | 功能描述:交流/直流開關轉換器 Low Cost Variable Off SMPS RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| NCP1215ASNT1 | 功能描述:開關變換器、穩壓器與控制器 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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