Hi, I'm designing a relay driver using DRV110. The attached waveform is from using DRV110EVM to drive a Panasonic Relay: HE1aN-W-DC24V-Y6.
The settings on DVM are: DCsupply = 24V, Rpeak = 750k, Rhold = 255k, Rosc = 200k, Rs = 5k.
In the PWM output, we observed that there is a small pulse appears after the regualr PWM pulse. And the measured frequency is 6.6kHz, whereas the desired frequency set by Rosc should be 20kHz.
I'm wondering what causes this small pulse, and what can I do to overcome this issue.
Thank you so much!
Ji