System Level Power Reference Design for A13 Automotive Wireless Charger Transmitter


Design files


PMP10709 is a system optimized 50 W power designs for A13 Wireless Charger Transmitter used in automotive system. The design has various front end automotive protections such as Load dump through TVS (ISO pulse testing), Reverse Voltage (Through PFET’s body diode), Battery Disconnect Switch with OVP protection (PFET). PMP10709 is primarily four Switch synchronous Buck – Boost design, which supports wide Input voltage range (7V-20V) and delivers any output from 1V-10V based on DAC output of the A13 Wireless Charger. The DAC output changes from 1V to 3.3V which in turn changes the output voltage from 10V to 1V (on the fly) as needed by the algorithm of A13 wireless charger’s transmitter. This design utilizes best in Class Synchronous four Switch Buck Boost Controller LM5175. The design accepts an input voltage of 7Vin to 20Vin and provides the output of 1V- 10V@5 A. Output current never exceeds 5A to protect the charging Coil. The average current regulation loop of the IC at the output is used for this protection.

  • Designed for Wide Vin Automotive condition
  • In compliance with the ISO pulse test using TVS
  • Switching frequency at 400kHz
  • Reverse Protection through PFET
  • Series Fault protection FET with OVP
  • Tested on Actual A13 Wireless Charger Transmitter
  • Output voltage options PMP10709.1
    Vin (Min) (V) 7
    Vin (Max) (V) 20
    Vout (Nom) (V) 10
    Iout (Max) (A) 5
    Output Power (W) 50
    Isolated/Non-Isolated Non-Isolated
    Input Type DC
    Topology Buck Boost- 4 Switch
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    A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

    Design files & products

    Design files

    Download ready-to-use system files to speed your design process.

    TIDUAK2.PDF (12265 K)

    Test results for the reference design, including efficiency graphs, test prerequisites and more

    TIDRGR3.PDF (309 K)

    Detailed schematic diagram for design layout and components

    TIDRGR4.PDF (400 K)

    Detailed schematic diagram for design layout and components

    TIDRGR5.PDF (25 K)

    Complete listing of design components, reference designators, and manufacturers/part numbers

    TIDCAU8.ZIP (1306 K)

    Design file that contains information on physical board layer of design PCB


    Includes TI products in the design and potential alternatives.

    Buck-boost & inverting controllers (external switch)

    LM517542V Wide Vin 4-Switch Synchronous Buck-Boost Controller

    Data sheet: PDF | HTML
    N-channel MOSFETs

    CSD17573Q5B30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 1.45 mOhm

    Data sheet: PDF | HTML
    N-channel MOSFETs

    CSD18531Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.6 mOhm

    Data sheet: PDF | HTML
    Shunt voltage references

    TLVH4311.5% low-voltage wide-operating current adjustable precision shunt regulator

    Data sheet: PDF | HTML

    Technical documentation

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    Type Title Date
    * Test report PMP10709 Test Results Sep. 09, 2015

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