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AMC1301: Current sensing for 500Khz switching boost converter

selvam perumal
Intellectual 535 points

Part Number: AMC1301

Hi,

Can we use AMC1301 for sensing switch current which switches at 500KHz in boost converter.

In datasheet,Input bandwidth is mentioned as 1MHz.But output bandwidth is mentioned as 210Khz.

Will output bandwidth limit the sensing of 500KHz input signal?

With regards,

Selvam

  • 0
    TI__Guru 61322 points

    Hi Selvam,

    The AMC1301 is composed of a 4 stages.

    1. Input

    2. Transmit over barrier

    3. Receive over barrier

    4. Filter

    The input stage has a bandwidth of 1MHz and the filter stage has a bandwidth of 210kHz. 

    The input stage is capable of sensing a 500kHz signal, however it will be greatly attenuated by the filter stage and therefor the output. 

    I would recommend considering a modulator as opposed to an amplifier for a signal of this frequency. 

    This paper may help: http://www.ti.com/lit/an/sbaa359a/sbaa359a.pdf