2025-07-28 10:44 PM
Hello All,
I am using L7987L to generate +15V from 24V. I have 10 same boards wherein I have used the same circuit (see below), I am able to generate 15V for 2 boards but in rest it is generating 1.22V only.
R191 is 6.8kohm and diode D36 is US1M-E3/61T.
SS pin is showing 0.07V only
Please note there was no change in layout for working as well as non-working boards. I have checked all individual resistors as well as replaced IC too. still the issue persists.