Excuse the quality, sorry;
RED is GATE of Q2.
YELLOW is GATE of Q4.
5V INPUT AT ALL STAGES
What are possible reasons that my H-bridge has a little ‘bump’ at the turn-off of the high-side?
It’s reflected on the Vin(bridge) too;
Circuit:
(also here )
I’ve added a new shiny ceramic capacitor to the Vbridge and GND connection, but no dice. Could it be that having a ground common to my H-bridge ground is bad?
Or perhaps the capacitor is refusing to discharge beneath 6V~ for a more obscure reason?
EDIT: It’s driving a 15-20mH load, but the bump is present with no-load and resistive loads on the order of 1000R, 100R, 10R.
EDIT2: Also, I’ve noticed that if I put in above 17V to the bridge, the power supply I’m using just shuts itself down and I have to restart the circuit.
EDIT3: Here’s a bunch of images of measurements I made.
Q2 DRAIN to GND
Q2 SOURCE to GND
Q1 SOURCE to GND
Q1 and Q2 GATE to GND (10V)
NEW WAVES
5V H-BRIDGE OUTPUT
10V OUTPUT
Q2 Gate/12V
