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DRV8803: Output Error

Part Number: DRV8803

Hey, I am using DRV  as 24V output source for the outside load. In this circuit, everything is performing well till DRV input when 3.3V coming to DRV Pin 14 Input 1 the output corresponding to that is 0 v and when we will not provide the 3.3V at IN1 the output is near about 5.1 V, But I think it must be 24V but also it is performing inversely. Same for all ports.

voltage after clamp diode D3is 5.2V.

3750.[07] - Digital Output.zip

  • Dheeraj,

    Let me repeat your statement:

    a. When Pin 14, IN1, is 3.3V, the output is 0V.

    b. When IN1 is 0V, the output is 5.1V. It should be 24V.

    c. All ports has the same behave.

    According to the DRV8803 block diagram, you have to put a load between the 24V input source and OUtx to get 24V on OUTx.