LM66100: Reverse current blocking during the off state

Kuramochi Tadahiko

Guru 28715 points

Part Number: LM66100

Hi,

Is reverse current blocked during off state?

Best Regards,

Kuramochi

over 6 years ago

0 Rakesh over 6 years ago

TI__Guru** 105791 points

Hi Kuramochi,

Yes, the device blocks reverse current in OFF state.

Best Regards,

Rakesh

0 Kuramochi Tadahiko over 6 years ago in reply to Rakesh

Guru 28715 points

Rakesh-san,

Thank you for your answer.

I have an additional question.

The device can not block reverse current during on state?

Best Regards,

Kuramochi

0 Rakesh over 6 years ago in reply to Kuramochi Tadahiko

TI__Guru** 105791 points

Hi Kuramochi,

The device blocks even in ON state when CE/ pin connected to VOUT. Please refer "8.3.2 Always-ON Reverse Current Blocking (RCB)" section in the datasheet and let me know if you have further questions.

Best Regards,

Rakesh

0 Kuramochi Tadahiko over 6 years ago in reply to Rakesh

Guru 28715 points

Rakesh-san,

Thank you for your quick response. I understood.

In the case of RCB configuration, does the LM66100 turns off during normal condition?

Best Regards,

Kuramochi

0 Kuramochi Tadahiko over 6 years ago in reply to Kuramochi Tadahiko

Guru 28715 points

Hi,

How is this situation?

I'm sorry to rush you.

Best Regards,

Kuramochi

0 Rakesh over 6 years ago in reply to Kuramochi Tadahiko

TI__Guru** 105791 points

Hi Kuramochi-san,

I am checking with the team. will answer you in couple of days time

Best Regards,

Rakesh

0 Aleksandras_Kaknevicius over 6 years ago in reply to Kuramochi Tadahiko

TI__Genius 15780 points

Hi Kuramochi-san,

In the RCB configuration, the CE pin is connected to the output, and the device does not turn off during normal conditions (VIN =< VOUT). Once VOUT becomes higher than VIN, the device will turn off to block reverse current.

Does this answer your question?

Thanks,

Alek Kaknevicius

0 Kuramochi Tadahiko over 6 years ago in reply to Aleksandras_Kaknevicius

Guru 28715 points

Alek-san,

Thank you for your reply.

In the RCB configuration, can the device turn off at no load?

I'm considering the case that VCE-VIN is not satisfied with -80mV(min).

Best Regards,

Kuramochi

0 Aleksandras_Kaknevicius over 6 years ago in reply to Kuramochi Tadahiko

TI__Genius 15780 points

Hi Kuramochi-san,

If the device is configured for RCB and it has no load on the output, then it will not turn itself off. At first, VCE=VOUT will be lower than VIN and the device will turn on. At this point, VOUT must rise above VIN to turn off, and with no load the device will not measure VOUT>VIN.

Thanks,

Alek Kaknevicius

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LM66100: Reverse current blocking during the off state