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Bidirectional buck boost dc dc converter for charging and discharging the batteries

I see LT8708 and LT8708-1 are the only bidirectional buck boost converters with DC2719A evaluation boards 

I want to use bidirectional buck boost converter for charging and discharging battery. Two converters are connected in a parallel with different batteries are connected at the output terminals of the converter. I planned to design a control system using Microcontroller using voltage , current sampling circuits and ADC. I generate PWM using Microcontroller to control the output of the converter boards. As I was connecting the boards in the parallel I use current sharing method.

But I see the output control of the DC2719A is controlled by Master slave communication technology.

Is it possible to control the output of the board by using external PWM control using Microcontroller?

If not is there any possible way to do it. Please inform me 

Thanks and Regards

I am uploading some figures for easy understading.

Parents Reply
  • Micro controls DAC (digital to analog converter), DAC output to FB pin or IMON pin. A micro needs to support the serial communication of the DAC selected. Select a voltage output DAC to feed the LT8708 FB pin through a resistor to control output voltage. Select a current output DAC to feed the desired IMON pin on the 8708 to control current.

    If you prefer to use a PWM output then an RC filter or op-amp integrator will be needed to remove the ripple.

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