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Power PROFET PWM Motor Driver

2015-03-21 19:14  
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 This power driver circuit is based on the PROFET transistor BTS 555 and is working at a switch frequency of 500 Hz. The reason for this low switch frequency is that the BTS 555 is a relatively slow component. This was the authors fist experimental PWM setup. However the power MOSFET version (below) is better. Note, the BTS 555 and the large diodes (DS75-08B and DSI75-08B) require relatively large heatsinks for high current motors. 

Circuit layout

BTS 555  The BTS555 N channel vertical power FET with charge pump, current controlled input and diagnostic feedback with load current sense, integrated in Smart SIPMOSâ chip on chip technology. Fully protected by embedded protection functions.