BQ24120: BQ241XX Compatibility

Emil Erickson

Part Number: BQ24120
Other Parts Discussed in Thread: BQ24104, BQ24109, BQ24103

Can you confirm that the only difference between BQ24120 and BQ24104 are the following?

Pin 2 - STAT1 (behavior)
- BQ24120 – either ON or OFF
- BQ24104 – either ON or OFF or alternating ON/OFF (0.5Hz interval)

Pin 13 – CELLS (NC in BQ24120)
- BQ24120 – NC
- BQ24104 – CELLS: ground or float for 4.2V, single-cell operation. Pull-up resistor to VCC for 8.4V, two-cell operation.

over 3 years ago

0 Michael Emanuel35 over 3 years ago

TI__Mastermind 34905 points

Hello,

I will get back to you by the end of the day tomorrow!

Thanks,

Mike Emanuel

0 Emil Erickson over 3 years ago in reply to Michael Emanuel35

TI__Expert 3125 points

Thanks Mike,

The customer also added a line about the BQ24109 and its' compatibility. I really appreciate your help.

0 Michael Emanuel35 over 3 years ago in reply to Emil Erickson

TI__Mastermind 34905 points

Hello,

BQ24104:

1. 1 or 2 cells selectable via CELLS pin (4.2 V or 8.4 V regulation) (Pin #13)

2. Blinking STAT1 pin (Pin #2)

BQ24109:

1. 4.2 V regulation (NC Pin #13)

2. Blinking STAT1 pin (Pin #2)

BQ24120:

1. 4.2 V regulation (NC Pin #13)

2. No blinking STAT1 pin (Pin #2)

3. Enhanced EMI Performance

Thanks,

Mike Emanuel

Please click "Resolved" if this answered your question.

0 Emil Erickson over 3 years ago in reply to Michael Emanuel35

TI__Expert 3125 points

Hi Mike,

Thank you for your explanations! The customer also asked about differences regarding the BQ24103RHLR if you're able to provide differences there as well.

0 Emil Erickson over 3 years ago in reply to Emil Erickson

TI__Expert 3125 points

Also, what gives the BQ24120 enhanced EMI? Internal filtering?

0 Michael Emanuel35 over 3 years ago in reply to Emil Erickson

TI__Mastermind 34905 points

Hello,

BQ24103:

1. 1 or 2 cells selectable via CELLS pin (4.2 V or 8.4 V regulation) (Pin #13)

2. No blinking STAT1 pin (Pin #2)

3. Requires diode D1 shown in Figure 16 of the datasheet.

As for the BQ24120, see the datasheet Figure 7 for "Typical Radiated EMI Performance Measured on EVM." Also, "The bq2412X has enhanced EMI performance that helps minimize the number of components needed to meet the FCC-B Standard. The rise time of the OUT pin was slowed down to minimize the radiated EMI."

Thanks,

Mike Emanuel

Please click "Resolved" if this answered your question.

Power management

Power management forum

BQ24120: BQ241XX Compatibility