Just to clarify my previous post- can you capture oscilloscope shots of these nodes specifically for 15V and 28V (data points on either side of the vertex in your graph):
1. Vout (gate-driving voltage) zoomed in enough to see the PWM switching
2. Vsense (current sensing node)
3. Idrain (solenoid current) zoomed in to see the peak and hold current levels
Let me know if you're able to produce these shots, as I think we'll be able to diagnose the cause with them.
Travis
1. Vout (gate-driving voltage) zoomed in enough to see the PWM switching
2. Vsense (current sensing node)
3. Idrain (solenoid current) zoomed in to see the peak and hold current levels
Let me know if you're able to produce these shots, as I think we'll be able to diagnose the cause with them.
Travis