I am building a spin-off of the eTesla circuit for a higher output voltage. Vdd = 5V and Vin = 20V.
I used the eTesla pcb layout and am using a uC to control the Enable line for duty cycle.
I tried tying the EN line high with a 47k just to test that portion of the IC and 1 out of 3 pcbs have no output.
I hard wired the EN line to Vdd and still no good. There is no sequencing diagram in the data sheet, but should be if it is important.
I have a free-running PWM signal, so that "come out of UVD or Overheat" precaution gets overridden right away by the next high to low to high PWM.
Any ideas why the IC hangs up? Changing ICs SOMETIMES fixes the problem. Comments?