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Original question:

BQ51050B: Is it possible to set Ibulk = 150mA in BQ51051BYFPR?

BQ51050B: BQ51050B design Question

Kami Huang60
Genius 3830 points
Part Number: BQ51050B
Other Parts Discussed in Thread: TIDA-00318, BQ51003

Dear Sir/Ms.

My customer has a question when designing bq51050B.
Regarding the calculation of the serial/parallel capacitance of RX Coil, how do L's and Ls correspond to Coil's Spec?
Also, do we have a recommended TX?
The charging target is a battery of about 50mAh, and the charging current is less than 50mA.

Best Regards,

Kami Huang

  • 0
    TI__Guru* 75656 points

    Hello Kami Huang

    The L's and Ls measurements are described in section 9.2.1.2 of data sheet.  L's represents the coil L value when installed and device is on TX.  Ls represents coil L value free space, data sheet L.

    We have recommended the TYLT-VU-SOLO and TYLT-VU.

    50mA is a little low for this device, charge current of 100mA and termination of 30mA are best.  For low charge currents 50mA see BQ51003, TIDA-00318.

    www.ti.com/.../TIDA-00318