LM5069: IC shutdown issue

Shanoj G

Part Number: LM5069

Hi ,

We are using LM5069MM-1 for 10A inrush limit and short circuit protection. Input voltage is 24V. Nominal load is 1.5A. When the inputs supply recycling at a faster rate or some times randomly, the chip goes in shut down mode, and we have to recycle input power to restore output. How to get rid of it? There is no short circuit or UVLO, OVLO condition happening. Our Schematic is attached. Please suggest any modification required.7457.LM5069.pdf Please suggest if any modification required.

Thanks

Shanoj G

System Specialist II

BTL India Pvt Ltd

Delta 1^st Floor, Sigma Soft Tech Park

Whitefield, Bengaluru –560066

Karnataka, India

Office: +91 80 49698666

over 5 years ago

0 Rakesh over 5 years ago

TI__Guru* 95691 points

Hi Shanoj,

Thanks for reaching out and the schematic details.
While input supply recycling - what is the minimum voltage of Vin.
Can you please share test waveform of Vin, Vout, GATE and the timer voltage.

Best Regards,
Rakesh

0 Rakesh over 5 years ago in reply to Rakesh

TI__Guru* 95691 points

Hi Shanoj,

Any update on the test waveforms? Are you able to figure out the issue?

Best Regards,
Rakesh

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LM5069: IC shutdown issue