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DRV8432 power supply

Prodigy 195 points

Replies: 3

Views: 378

Hi all,

I have a couple of questions regarding the drv8432

1. When operating in "dual full bridge" mode (M1=M2=M3=0) can the supply voltages for bridge 1 and 2 be set independently [PVDDA = PVDDB = V1 and PVDDC = PVDDD = V2]?

2. Also in this mode and with different supply voltages, will the CBC current limit threshold be same for both bridges?

3. The ABSOLUTE MAXIMUM RATINGS suggest that the PWM_X to GND should be under 4.2V. What is the nominal ON voltage value for PWM_X ? I need the value to implement a resistor divider for the PWM inputs as my micro puts out a 0 to 5V PWM.

4. It would also be helpful if you can answer this question as there have been no replies to it !!!!!!!!

Best regards

Gehan 

3 Replies

  • Hi Gehan

    For question 1 and 2, we do not recommend to use different VM levels for bridges. But still I will check with our designers whether there is risk to do so and back here later.

    question 3, for PWM_X, LOW range is 0~0.8V. HIGH range is 2~3.6V.

    Thanks.

    Wilson

    Wilson Zuo

    Motor Application Team

    ---- Please Click the Verify Answer button on this post if it answers your question ----

  • In reply to Wilson Zuo:

    Hi Gehan

    We checked and the answer for question 1 and 2 is that all the four PVDD pins should have the same voltage level at all mode configurations.

    Please do not use DRV8432 as the way you mentioned.

    Thanks.

    Wilson

    Wilson Zuo

    Motor Application Team

    ---- Please Click the Verify Answer button on this post if it answers your question ----

  • In reply to Wilson Zuo:

    Thank you for the reply !!!!!!!!!!!

    If you can, please take a look at the following question and give a suggetion

    http://e2e.ti.com/support/data_converters/etc_data_converters/f/77/t/282976.aspx

    Thanks 

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