I need to minimize the heat produced in my current limited PWM, instead of using a current sense resistor which does get hot I thought about sensing the RDS of the hexfet.
My current circuit without filter or regulator is shown in CCT1, the current limit is set by R36 and is sensed by R39.
I had an attempt (CCT2) using a small signal FET form my spice library and have a couple of questions.
1. Is this a reasonable approach?
2. Any recommendations to improve the current circuit ?
My current circuit without filter or regulator is shown in CCT1, the current limit is set by R36 and is sensed by R39.
I had an attempt (CCT2) using a small signal FET form my spice library and have a couple of questions.
1. Is this a reasonable approach?
2. Any recommendations to improve the current circuit ?
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