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參數(shù)資料
| 型號： | NCP4326DR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Secondary Controller for Multi−Output Quasi−Resonant Switchmode Power Supplies |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 27/30頁 |
| 文件大?。?/td> | 432K |
| 代理商： | NCP4326DR2 |
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NCP4326
http://onsemi.com
27
Secondary winding
voltage (20V/div)
Sync
pin voltage
(5V/div).
Ct pin voltage
(2V/div)
Figure 51. SoftStart Duty Cycle Generation During the Startup Sequence.
During the primary on time, the secondary winding
voltage is equal to the input voltage multiplied by the
transformer turn ratio. At the primary switch on or the falling
edge on the secondary winding voltage, the Ct capacitor
voltage is reset to VCt_min and keeps it to this value as long
as the primary switch is in ON state. Then when the primary
ON time ends the Ct capacitor voltage is released, thus with
the internal current source on Ct pin, the voltage capacitor
rises linearly until a new primary switching cycle.
Primary Feedback Regulation
The NCP4326 integrates a precision reference voltage,
which together with a dedicated operational amplifier
reduces the feedback loop elements to the minimum. This
error operational amplifier with the reference voltage has
called the shunt regulator and offers the same behavior of a
traditional TL431 or TLV431.
1V25
FBm
CPm
8
+
GND
9
NCP4326
FBm
CPm
8
9
GND
TLV431
Figure 52. Equivalent Schematic of the Shunt Regulator
V
DD1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP4326DR2G | 功能描述:初級與次級側(cè) PWM 控制器 Quasi Resonant Secondary Side RoHS:否 制造商:ON Semiconductor 輸出端數(shù)量:1 開關(guān)頻率:250 KHz 工作電源電壓:- 0.3 V to + 28 V 最大工作溫度:+ 85 C 最小工作溫度:- 5 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Reel |
| NCP4328 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Secondary Side CV/CC Controller |
| NCP4328BSNT1G | 制造商:ON Semiconductor 功能描述:REEL / SECONDARY SIDE CONSTANT V |
| NCP432B | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Programmable Precision References |
| NCP432BCSNT1G | 制造商:ON Semiconductor 功能描述:PROGRAMMABLE PRECISION RE - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / PROGRAMMABLE PRECISION RE |
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