14
votes
3answers
3k views

How diodes protect H-bridge DC motor driver?

I don't really understand how these diodes in this circuit and similar circuits (like driving a relay circuit) protects the controller circuit from the energy stored by the inductance of the coil. I ...
1
vote
1answer
215 views

High voltage H-bridge diode

i'm designing a varable-frequency drive with 2 H-bridges based on IR2108 half-bridge drivers. I want it to drive a 220v single-phase motor. Reading the datasheet i got a little confused on choosing ...
1
vote
1answer
318 views

Using a diode or resistor, to supply minimal voltage to LED Driver (Help!)

I'm using a dual 60W LED multi-chip pendant lighting (a.k.a. "high bay" pendant light with two 60W LED chips). This light is using an RGB driver (one per multi-chip) that has a remote control to ...
2
votes
1answer
376 views

Suppression diode for relays in ULN2803A

I want to make a simple 8 chanel relay multiplexer. My choice for driver IC at the moment is ULN2803A and for relays it is a 12v DC DPST relay. I read in ULN2803A datasheet that it contains ...
3
votes
2answers
862 views

Motor drivers and kickback diodes

I am considering buying one of the hbridge drivers referenced in the below tutorial, but when I looked at the comments underneath the second hbridges sparkfun page, kickback diodes were referenced and ...