I'm having issues with the output being disabled (100% DUC on PWM input, with no output). I think the chip might be going into UVLO mode or something else. My main culprit is the 5V line. It's a 1.5A supply, but on bootup, at 50mS in, there is some ripple.
Pin connection
- Pullup 10K to 3.3V
- 5V, 4.7uF bypass cap
- GND
- Out
- In (15V)
- 100nF cap, to boot
- 100nF cap, to boot_r
- PWM input
I don't know why this would be happening the supply is fine and can be loaded with no ripple. Any suggestions?