BQ2000: Operation under Vcc=4V of BQ2000

takahiko yokota

Mastermind 7135 points

Part Number: BQ2000

I have a question about BQ2000 from my customer.

If I inputted the voltage under 4V to Vcc, how does BQ2000 operate?

(ex. If I inputed 3.7V on Vcc, does this device stop charging?)

Best regards,

Yokota

over 6 years ago

0 Kedar Manishankar over 6 years ago

TI__Mastermind 24075 points

Hi Yokota-san,

Yes device will stop charging if VCC is below 4V. If you refer to the state diagram on page 4 of the datasheet, VCC should be between 4V and 6V for IC to initiate charge, and only after initialization can IC enter charge qualification.

0 takahiko yokota over 6 years ago in reply to Kedar Manishankar

Mastermind 7135 points

Thank you for the reply.

Please let me ask you more questions about the charging stop condition.

If Vcc changed 70mV in chargeing(but Vcc is 4~6V), does BQ2000 stop charging?

Are there possible to stop charging by the noise and voltage transition under Vcc =4~6V?

Best regards,

Yokota

0 Kedar Manishankar over 6 years ago in reply to takahiko yokota

TI__Mastermind 24075 points

Hi Yokota-san,

This is an old part and we don't have specific information on the deglitch time for BQ2000 to detect out of range VCC to stop charging, as well as what the hysteresis voltage VCC requires to enter and exit charging. Customer will have to verify on their board.

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BQ2000: Operation under Vcc=4V of BQ2000