LM5069: spec check

GARETH OU

Part Number: LM5069

What is the action response time of OVLO of LM5069? After the System t-on, there is a sudden surge, and when it hits the OVLO, how long does it take for the Gate Pin to respond (fastest)?

over 3 years ago

0 Rakesh over 3 years ago

TI__Guru** 106201 points

Hi Gareth,

It is 11us

Best Regards,

Rakesh

0 GARETH OU over 3 years ago in reply to Rakesh

Guru 11585 points

Hi Rakesh

So this Delay should be added to the Delay of timer pin# cap, right?

0 Rakesh over 3 years ago in reply to GARETH OU

TI__Guru** 106201 points

Hi Gareth,

The device does not wait for timer delay for an overvoltage event. you have to consider only 11us (typ)

Best Regards,

Rakesh

0 GARETH OU over 3 years ago in reply to Rakesh

Guru 11585 points

Hi Rakesh

Do you have a waveform with zero gate voltage after OVP?

How long is the time shown in the picture below?

0 Rakesh over 3 years ago in reply to GARETH OU

TI__Guru** 106201 points

Please refer Figure 37 in the datasheet

0 GARETH OU over 3 years ago in reply to Rakesh

Guru 11585 points

Hi Rakesh

Customers think Figure 37 happens ovp >11us a lot before Shut down mosfet Is there any other waveform to confirm?

0 Rakesh over 3 years ago in reply to GARETH OU

TI__Guru** 106201 points

Please get below information

1. Schematic

2. Test result with Vin, Vout, GATE, OVP pin captured.

Best Regards,

Rakesh

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LM5069: spec check