CMOS system power supply interface-DC switch circuit

Published:2011/6/20 19:13:00 Author:TaoXi | Keyword: CMOS, system, power supply, interface, DC, switch | From:SeekIC

The CMOS system power supply interface-DC switch is as shown in the figure. Circuit (a) is the CMOS output circuit, it turns on and turns off the 14V, 80mA bulb circuit by using the small power transistor PNP Darlington MPSA65; circuit (b) uses the NPN Darlington MPAS13 high level to turn on the bulb; circuit (c) uses the CMOS output to drive the high sensitivity SCR 2N5060 directly. The high sensitivity SCR 2N5060 can be used in the extremely hard condition (-65℃), the maximum gate current is 35μA. It requires the CMOS to output the high level of 14.8V.



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