Wireless Charging System Transmitter IC for Low Power Applications

Wireless charging solution is suitable for the wearable market which are required small size and high efficiency for long life battery. A wireless charging system consists of power receiving and charge/discharge system and power transmitter system. The feature of power receiving and charge/discharge system IC RAA457100 is integrated all functions needed for a wireless chargeing, rectification, charging control for small Lithium-Ion battery and top level of power-efficiency DC-DC converter in a singl chip as 3.22mm x 2.77mm small package. The features of power transmitter IC RAA458100 is integrated functions such as gate driver and power transmitter control circuit.

Product Status: Mass Production


RAA458100 is wireless charging system transmitter IC for low power applications. When RAA457100 is used in a receiver, a wireless charging system with bi-directional communication can be constructed.


    • Three operation modes which are available for various applications
      ATPC(AuTomatic Power Control) Mode , MCU Control Mode , Stand Alone Mode
    • Gate drive output for MOSFET bridge circuit : half bridge or full bridge is selectable
    • Over current protection for bridge circuit (OCP), Over temperature protection (THM), and various protection functions
    • Monitoring input voltage or current of bridge circuit and thermistor voltage (Temperature) by 12bit A/D convertor
    • Modulation/Demodulation function for bi-directional communication between transmitter and receiver
    • RAA457100 registers can be set by bi-directional communication from RAA458100 (ATPC Mode)


 Block Diagram


Basic Information
Part Name
Production Status
Mass Production
Wireless charging system Transmitter IC for low power applications
Tj-opr (°C)
-20 to +80
Pin Count
Package Type
Package Code

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