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Output voltage MC33879 is to low

Question asked by Dennis Restle on Mar 27, 2019
Latest reply on Mar 28, 2019 by Dennis Restle

Hello,

 

We have the MC33879 in our Design. See Attachment. But we noticed that the Output Voltag is way below our Input Voltage.

A Small load of a single relais with ~20 mA drops the Voltag to 19V.

The Power supply is ok, the Voltage stays in a range of 23.90 to 24.20 V on the D-inputs of the MC33879. But the S-Outputs of the MC33879 is with 19.xx Volt quite low.

Where are those 4 to 5 Volts lost?

 

Best regards

Dennis

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