TPS3700 under voltage detection

Knighty Nimp

Expert 1260 points

Other Parts Discussed in Thread: TPS3700

Hello

Can TPS3700 detect under voltage with active high output?

my system as below.

12V battery

11.V threshold

active hign

Thank.

over 9 years ago

0 David Hopkins over 9 years ago

TI__Expert 8905 points

NT,

The timing diagram below shows that OUTA is active high when INA+ is at the correct voltage, and OUTB is active low for when INB- is at the correct voltage. As such, the circuit can be designed to detect under voltage with an active high output.

The schematic below for the 12V rail will have OUTB go high when the 12V rail is in a under-voltage condition.

Regards,

David

0 Knighty Nimp over 9 years ago in reply to David Hopkins

Expert 1260 points

David,

Thanks, btw If I need monitor undervoltage only 12V rail ( 12V battery), how to ignore INA and OUTA? should be pull up to vcc or pull down to GND?

0 Knighty Nimp over 9 years ago in reply to Knighty Nimp

Expert 1260 points

application circuit like attached.

7206.SC.pptx

Regards,

0 David Hopkins over 9 years ago in reply to Knighty Nimp

TI__Expert 8905 points

NT,
For the other rail I would advise to keep it in a known state. It is not necessary and you can leave it floating, or you can tie INA to INB and leave OUTA floating to keep power consumption down while keeping OUTA in a known state.

Regards,

David

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TPS3700 under voltage detection