LM66100: LM66100 in Reverse Current Blocking

Celso Silva

Part Number: LM66100

One Question, using the LM66100 in RCB,

Suppose that the Vin is a coin battery and the Vout is connected to a wireless MCU1 like CC2652 that reads sensor data and transmitted it to another wireless MCU2.

I want that when the battery is disconnected the ST pin gives that information to the MCU1 (interrupts), and the MCU1 has time to communicate ("POWER LOSS") to MCU2 before the power on MCU1 drops out.

Could I use the circuit above to do that. (The CL capacitor 220uf).

Best regards

over 4 years ago

0 dimitri james over 4 years ago

TI__Genius 10652 points

Hi, Please reupload the photo? it is not showing

0 Celso Silva over 4 years ago in reply to dimitri james

Prodigy 70 points

0 Celso Silva over 4 years ago in reply to Celso Silva

Prodigy 70 points

0 dimitri james over 4 years ago in reply to Celso Silva

TI__Genius 10652 points

Hi Celso,

Thanks

My colleague Shreyas has a response for your question on ST:

You picture has not been uploaded correctly and so I cannot comment on it exactly. Please note that LM66100 works by comparing Vin voltage to CE voltage at all times. Until the CE voltage rises above the Vin voltage, the ST will remain floating.

So in your system, unless shutoff it triggered, the ST will not pull low which could result in different behavior from what you expect.

Please let us know if you have any other questions on this topic.

Best

Dimitri

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LM66100: LM66100 in Reverse Current Blocking