BQ27421-G1: REGIN

Toshiro Imi

Expert 7170 points

Part Number: BQ27421-G1

while I have checked the technical document, I cannot understand what "REGIN" stands for.

can you let me know REGIN definition.

regards,

over 6 years ago

0 Onyx Ahiakwo over 6 years ago

TI__Guru* 76230 points

Hi Tohshiro,
Regin is the input pin for the internal LDO of the chip
thanks
Onyx

0 Toshiro Imi over 6 years ago in reply to Onyx Ahiakwo

TI__Expert 7170 points

Hi Onyx,

thank you. So that means REGIN is as same as BAT pin as I looked at the Functional Block Diagram.

Is my understanding correct ?

best regards,

0 Onyx Ahiakwo over 6 years ago in reply to Toshiro Imi

TI__Guru* 76230 points

No. BAT pin is used for cell voltage measurement while reg in is the supply to the chip
thanks
Onyx

0 Toshiro Imi over 6 years ago in reply to Onyx Ahiakwo

TI__Expert 7170 points

hello,

REGIN is not assigned in following block diagram, so please let me know how I recognize REGIN. Is this internal power supply input name as 1.8V LDO input. If my understanding is correct, the voltage is as same as BAT by looking at the block diagram.

best regards,

0 Onyx Ahiakwo over 6 years ago in reply to Toshiro Imi

TI__Guru* 76230 points

Hi Toshiro
Sorry i thought this was about a different gauge. FOr this gauge bat pin serves both as the voltage measurement and input to the ldo.

thanks
Onyx

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BQ27421-G1: REGIN