WEBENCH® Tools/BQ25120A: MR pin and LDO in BQ25120A.

Hinal Tailor

Part Number: BQ25120A
Other Parts Discussed in Thread: BQ25121A

Tool/software: WEBENCH® Design Tools

Hello

I am using BQ25120A for providing power to my system and charging my battery with 4.2V/300mA. My system require 3.3V from SW and 1.8V from LDO.

1. I need to know when host is absent, battery is connected and no VIN applied, can I get 3.3V from SW pin for the first time(when no I2C registers applied)?

2. I am not using push button on /MR pin, How can I put BQ in ship mode?

Best regards,

Hinal Tailor

over 4 years ago

0 Raheem over 4 years ago

TI__Mastermind 21590 points

Hello,

1) Since the device SYS pin is set to 1.8V by default, you'll have to program the device through I2C to get 3.3V. We have the BQ25121A which defaults to 2.5V on startup.

2) You can put the device in shipmode through I2C in register 0x00.

I dont see any issue on the schematic.

0 Hinal Tailor over 4 years ago in reply to Raheem

Prodigy 195 points

Hello

Thank you for your response.

Best regards,

Hinal Tailor

0 Hinal Tailor over 4 years ago in reply to Raheem

Prodigy 195 points

Hello

Can you please share your email address?

I just need to share my design for verification.

Thanks & Regards,

Hinal Tailor

0 Raheem over 4 years ago in reply to Hinal Tailor

TI__Mastermind 21590 points

We'll continue this discussion offline.

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WEBENCH® Tools/BQ25120A: MR pin and LDO in BQ25120A.