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BQ24616: Can you help me review the schematic?

user5707026
Genius 3145 points
Part Number: BQ24616
Other Parts Discussed in Thread: BQ24610

Dears

I designed the BQ24616 schematic, please help me review it. And also use LM5175PWP, TPS53515RVER. Can you give me some advice to repir?

phm_come_carrier_TI_20200320.pdf

Thanks a lot.

Elsa Duan

  • 0
    TI__Mastermind 40305 points

    Dear Elsa,

    My review of the bq24616 is below.

    1. Would recommend a 10 nF capacitor on SYSTEM+ for a high frequency noise decoupling capacitor.

    2. I would recommend taking a look at Table 4 on page 30 of the datasheet. It appears that your output capacitor selection does not put the resonant frequency in the desired 12 kHz to 17 kHz range (yours is about 9.6 kHZ). We provide internal loop compensation that has best stability with the above resonant frequency range.

    3. Just wanted to confirm the battery regulation voltage of 12.6 V?

    4. Would recommend moving the connection of the Schottky diode from REGN to be tied directly from REGN to BTST.

    5. Would recommend a switching converter snubber circuit from the PH to GND.

    6. Just wanted to confirm the safety timer of 9 hours.

    For a more detailed explanation of this review, checkout this FAQ for the schematic of the bq24610. The main difference is the bq24616 has a JEITA temperature charging profile and the bq24610 does not.

    https://e2e.ti.com/support/power-management/f/196/t/791790

     Thanks,

    Mike Emanuel

    Please click "This resolved my issue" button if this post answers your question.