Hey Henry,
This device won't work for your application. This driver doesn't change the output voltage, it just controls the H-Bridge states as shown here:
When driving (Forward/Reverse drive) this will basically be a PWM signal at VM voltage.
If you were controlling a motor, see Table 8-2 PWM Control in the datasheet. You should tie IN2 HIGH or low depending on if you're going to drive the motor forward or reverse. Though IN1 and IN2 do have a internal pulldown resistor (Table 6-1. Pin Functions), so if you leave them floating they will be in a high state.
Looks like this post was accidentally posted 3 times, I have deleted the other two instances of it.
Regards,
Jacob
Hi Sir,
I shared the system function shown in the below figure.
We would like to use the OUT1 function to control the duty waveform to adjust the VDC voltage level. Could you please help me confirm the function?
Hey Henry,
Ahh I see. That should be possible. Since IN2 has a internal pulldown resistor, if you leave it disconnected then you'll be switching IN1 between HIGH and Hi-Z output. I suspect you would prefer switching between LOW and HIGH output, which you could achieve by tying IN1 HIGH and PWM IN2.
Since this is outside the typical use case for this chip, I highly suggest ordering a DRV8210EVM or request some samples of DRV8210P and testing it out before you get too far into your PCB design/ordering process. You can swap out the DRV8210 chip on that EVM with a DRV8210P, though note that pin 7 is MODE on 8210 vs nSLEEP on 8210P, so you'll need to externally control that.
Cheers,
Jacob
