Is there a device that can...

pbabin · 2005-06-05T13:36:19+00:00

I often have to use an NPN transistor (emitter on ground) to turn on a PNPtransistor (emitter on +B) to efficiently switch positive voltage. Is there adevice that can replace the two transistors and two resistors required to switchthe +B supply?The required collector current would be less than 500ma and the Vce would beless than 50v. Ideally, it would be a 4 legged device that would be in a case similar in sizeto a TO-92 device.I know that an opto-isolator could do it but they're too expensive in mostcases. Thanks in advancePB--------------= Posted using GrabIt =----------------------= Binary Usenet downloading made easy =----------= Get GrabIt for free from =-