光耦的PSpice建模

baqiao

What are some tips for modeling optocouplers for Pspice?
1 j, a; }" ]- w- C  S7 S1 RThough Model Editor does not provide a template for either an optocoupler or for a phototransistor, it can beused create components of these models. For example,you can use Model Editor to model the electricalcharacteristics of the input LED of an optocoupler.
7 z& a) {$ t1 M7 m' H& e# m) o' mIn the case of the optocoupler，you need to create a model for a LED input，and also for a single BJTphototransistor output optocoupler.
1.LED
To model LED input, fit the forward current vs. voltage curve of the LED, and the LED capacitance curve toa PSpice diode. These curves are available in datasheets.
2.CTR curve fit
/ Z+ r" F6 j" K7 t: sUse Mathcad or Excel to fit the CTR curve to a polynomial. A polynomial which may work is of the formA*exp(B+Cx).
In the sample model shown below, the Gpcg source models the CTR curve. In this case, two regions were fitseparately, the region If<=10mA and the region If>10mA, where If is the LED forward current. The outputcurrent of the Gpcg source is the phototransistor collector current.

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senlenced3

这是纯英文的？

Kitty0515

光耦的PSpice建模

yl120836513

正需要

dsgh

纯英文吗？      
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hui69

一个具备反馈系统的PWM电源PSPICE仿真模型