Hi,
I've been reading as much as I can about diode calculations for pwm in a mosfet h bridge. I have a new working soldered dual motor driver board tested with small hobby motors. No issues. No heat. Im about to ramp it to a 12v+, 10amp test, so I would like to have the protection aspects covered.
I have a standard configuration with two p channel (irf9540) and two n channel fets (irfz44) driven by a tc428 driver IC at 2Khz from a raspberry pi. I understand schottky diodes are preffered for emf kickback protection, however my local store has limited options. Will four 1n5820/21 schottky diodes work at 2k frequency? 3amp diodes are the largest they have and the data sheet indicates a recovery time of approx 500ns. I'm hoping they will have a fast enough capability to shunt around 10a of pulsed current safely. Any recommemdations would be appreciated.
Diode data: https://www.digikey.ca/product-detail/en/on-semiconductor/1N5821/1N5821FSCT-ND/4314811
I've been reading as much as I can about diode calculations for pwm in a mosfet h bridge. I have a new working soldered dual motor driver board tested with small hobby motors. No issues. No heat. Im about to ramp it to a 12v+, 10amp test, so I would like to have the protection aspects covered.
I have a standard configuration with two p channel (irf9540) and two n channel fets (irfz44) driven by a tc428 driver IC at 2Khz from a raspberry pi. I understand schottky diodes are preffered for emf kickback protection, however my local store has limited options. Will four 1n5820/21 schottky diodes work at 2k frequency? 3amp diodes are the largest they have and the data sheet indicates a recovery time of approx 500ns. I'm hoping they will have a fast enough capability to shunt around 10a of pulsed current safely. Any recommemdations would be appreciated.
Diode data: https://www.digikey.ca/product-detail/en/on-semiconductor/1N5821/1N5821FSCT-ND/4314811