• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 288 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM5121: Pls help review our SCH design.

Fiona Yin
Prodigy 55 points
Part Number: LM5121
Other Parts Discussed in Thread: BQ24610, TPA3220

Dear Sir/Madam,

We have designed the SCH according to BQ24610/LM5121 datasheet and LM5121 online simulation parameters.

Pls help review our SCH design.

The background is as below:

1. LM5121 input is either from switching mode PSU which is 24V or battery pack (15V-18.5V), output 26V/10A to 3pcs amplifiers TPA3220:

1pcs for tweeter,  2x10Wrms, 17.5Wpeak 1% THD @ 16ohm; 

1pcs for mid-range speaker, 2x15Wrms, 35Wpeak 1% THD @ 8ohm;

1pcs for subwoofer, 80Wrms, 120Wpeak 1% THD, 160Wpeak 10% THD @ 2 ohm;

2. BQ24610: charge a 5S2P 18650 battery pack (15V-18.5V) via PSU 24V. The battery pack uses BQ78350DBTR-R1 and BQ7692003PWR.

BQ24610+LM5121.pdf

  • 0
    TI__Intellectual 2775 points

    Hi

    Thank you for your choice our device, I will force on LM5121. You can submit other devices in separate topics. 

    1）I don't what this use for, this seems to be an ON/OFF control.
    If it is only a ON/OFF control, it is recommended to add only a MOS control.

    2) I cannot find the current Q7/Q8 MOS type， In fact, your total power is 260W, you need to pay attention to the MOS  selection.

    3）For Q6， need check the SOA curve.