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Switch Mode Regulator Provides -12V Negative Supply from Pos

2015-09-20 13:34  
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This article describes the Switch Mode Regulator Provides-12V Negative Supply from Positive Supply (74HCT86D). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:74HCT86D.

This is a circuit that can provide -12 V negative supply from positive supply. The output voltage is Vo= -Vin· D/(1-D). The maximum output current is Iout=1·(1-D). Here is the circuit :

Switch Mode Regulator Provides 12V Negative Supply from Positive Supply circuit schematic diagram

In this circuit, the ground of U1 is connected to negative output voltage. The input voltage of U1 must be lower than maximum operating input voltage, 36V, because the U1′s input voltage equal to Vin-Vo.


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