I am about to fabricate this H-bridge board and would appreciate any feedback you have regarding this circuit. Any comments is appreciated.
Here is the schematic:
Each motor has 3 control pins. Enable, Logic1 and logic2. Logic1 and 2 control the motor direction and are controlled by a microcontroller. This circuit is based on an H-bridge IC, why do you need a boostrap circuit?
I know I have been debating whether to add them or not because that will increase the board size. Now since you mentioned it, I will figure out a way to add them. I think it's a good idea. Thanks for the feedback.
The ground should be a star ground as stated in the schematic. So it should not be connected else where. Also it is better to have a ferrite bead which can be mounted based on the need.Else a zero ohm resistor can be populated there.The ferrite bead suppress the noise coupled to GND as motor ground generally is too noisy.
The ground should be a star ground as stated in the schematic. So it should not be connected else where. Also it is better to have a ferrite bead which can be mounted based on the need.Else a zero ohm resistor can be populated there.The ferrite bead suppress the noise coupled to GND as motor ground generally is too noisy.
Ok, great thanks. I am unsure about the motor ground on the IC, all 4 ground pins are labeled as ground. I am assuming Motor ground is the on the same side as Vcc2 pin ( pin 4 and 5). The datasheet doesn't mention which ground is which. What do you think? https://www.ti.com/lit/ds/symlink/sn754410.pdf
" The four ground pins are all part of the lead-frame's die paddle. This is make these pins also the heat sink connection; make sure the circuit board supports heat flow into the board via these four pins. The logic and four power grounds are connected to the same lead-frame"
So I am going to treat all 4 ground pins the same way and have them connected to the same ground plane.