According to the datasheet, IN1 inputs PWM（high is 3.3V），IN2 inputs HIGH，then OUT1 outputs LOW and OUT2 outputs PWM(high is 5V)
IN2 inputs PWM（high is 3.3V），IN1 inputs HIGH，then OUT2 outputs LOW and OUT1 outputs PWM(high is 5V)
We can drive the coils with max 5V(it can be adjusted by PWM Duty Cycle) and can change its direction by input.
1. Is this circuit right?
2. I have tried three devices, Two of them are OK(They can achieve the function mentioned before). But the last one only can output one direction, It can not change its output direction even if I change its input. Is it because this device has been destroyed. It has a strange burned smell. But, I don't know how to result in this situation. Why this situation can happen?
3. Is it allow to input two HIGH at the same time? What should I take care when I use DRV8837?
4. Because of the load I connect is a coil(many circles of copper wires), it is a Inductive Element. It is Anti-EMF destroy the drv8837?How to Eliminate the Anti-EMF especially when we change the output direction. Is it OK for drv8837 in this condition if we do not add protective circuit?
5. What is the PWM frequency range I can input?
6. Is it need to add Filter circuit after the dvr8837 output?
7. If you have any advice, Please tell me.
Thank you!