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CCS/TMDSHVMTRPFCKIT: Reference voltage acqusition current

Expert 1645 points

Replies: 2

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Part Number: TMDSHVMTRPFCKIT

Tool/software: Code Composer Studio

Dear TI,

I am using the HVMotorCtrl+PFCKit-R1.1

could tell me please the reference voltage connected to the OPA2350.

What is the purpose of the Ref-3318? does this circuit is used to generate 1.65V?

What is the maximum current we could measure with this acquisition circuit.

Thank you in advance.

S.Tarik

  • It's a voltage reference device, the output is 1.8V. The 1.65V reference will be achieved by 1.8V*22k/(22k+2k)=1.65V, and the gain is ((2k*22k)/(2k+22k))/221=8.2956, so the peak to peak sampling current is 3.3V/0.02/8.2956=19.89A for this circuit.

  • In reply to Yanming Luo:

    I really liked this answer.

    Bravo! And thank you.

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