System Level Power Reference Design for A13 Automotive Wireless Charger Transmitter
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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

  • See the Important Notice and Disclaimer covering reference designs and other TI resources.


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    (Output Voltage 1)
    Vin (Min) (V)7
    Vin (Max) (V)20
    Vout (Nom) (V)10
    Iout (Max) (A)5
    Output Power (W)50
    Input TypeDC
    TopologyBuck Boost- 4 Switch

    TI Devices (4)

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    Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
    CSD17573Q5B  30V, N ch NexFET MOSFETâ„¢, single SON5x6, 1.45mOhm  MOSFETs  Sample & Buy Not Available
    CSD18531Q5A  60V, N ch NexFET MOSFETâ„¢, single SON5x6, 4.6mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
    LM5175  42V Wide Vin 4-Switch Synchronous Buck-Boost Controller  Buck-boost & inverting regulators  Sample & Buy View Design Kits & Evaluation Modules
    TLVH431  1.5% low-voltage wide-operating current adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules

    CAD/CAE symbols

    Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
    CSD17573Q5B VSON-CLIP (DNK)| 8 Download
    CSD18531Q5A VSONP (DQJ)| 8 Download
    LM5175 Download Download
    Download Download
    TLVH431 Download Download
    Download Download
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    Technical documentation

    See the Important Notice and Disclaimer covering reference designs and other TI resources.

    User guide (1)
    Title Type Size (KB) Date
    PDF 12204 09 Sep 2015
    Design files (4)
    Title Type Size (KB) Date
    ZIP 1306 09 Sep 2015
    PDF 25 09 Sep 2015
    PDF 400 09 Sep 2015
    PDF 309 09 Sep 2015

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