MC34063A Inverting

193

02:04:27

12V to about -7VDC, with 440mApk, ripple 200mV, and 100kHz clock (Ct=330pF).

First Start Clock by closing bottom middle switch. Then turn on Feed Back by opening lower right switch. Other switches are for loading and bias near operating point.  

The opamps and logic force ground to be where Vout should so this circuit is not how application notes (from TI) show it.  

also trying values from a web calculator:
http://www.nomad.ee/micros/mc34063a/

published 10 years ago

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