Dear EngineerZone comunity,
I have problem with low power DC-DC convertor LT8361.
I use schematic - "450kHz, 5V to 60V Input, 80V Boost Converter" page23 for the positive 5V to 96V converter and
schematic - "450kHz, 4.5V to 12V Input, –150V Output, Automotive LiDAR APD Bias Power Supply" page28 for the negative 5V to -96V converter.
Both schematics give 96V +/- 1% with loading (4.7K) and without.
The problem is current consumption without loading.
Positive voltage converter usually has few microamps and run 10 - 50 kHz depend to inductor value,
but sometimes after power on it has 20mA and run 450 kHz. After connect/disconnect load it return to microamps.
Negative voltage convertor always has 20mA and 450kH (instead of microamps and few kHz in LTspice).
What I need change in schematic for correct start with microamps and lower frequency?
I can send more oscilloscope pictures if necessary.
Thank in advance
This is inductor voltage for the positive voltage convertor.