Single-Chip 5V Wireless Power Transmitter IC for TX-A5 and A11

Topology: Wireless Power
Input Voltage (min.): 4.75 V
Input Voltage (max.): 5.25 V
Switching Frequency (min.): 110.00 kHz
Switching Frequency (max.): 205.00 kHz


The IDTP9035A is a highly-integrated WPC-compliant wireless powertransmitter IC for power transmitter design A5 and A11. The deviceoperates with a 5V (±5%) adaptor, and utilizes an external full-bridgeinverter to provide a highly-efficient solution for A5/A11 transmitterapplications. It controls the transferred power by modulating theswitching frequency of the full-bridge inverter from 110kHz to 205kHz ata fixed 50% duty cycle specified by the WPC specification for anA5/A11 transmitter. It contains logic circuits required to demodulateand decode WPC-compliant message packets sent by the mobiledevice to adjust the transferred power.The IDTP9035A is an intelligent device that periodically pings the areasurrounding the base station to detect a mobile device for chargingwhile minimizing idle power. Once the mobile device is detected andauthenticated, the IDTP9035A continuously monitors allcommunications from the mobile device, and adjusts the transmittedpower accordingly by varying the switching frequency of the half-bridgeinverter.The IDTP9035A features a proprietary back-channel communicationmode which enables the device to communicate with IDT’s wirelesspower receiver solutions (e.g. IDTP9020). This feature enablesadditional layers of capabilities relative to standard WPC requirements.This device also features optional security and encryptions to securelyauthenticate the receiver before transferring power. This feature isavailable when an IDTP9020 is used for the receiver.The device includes over-temperature/current protection and a ForeignObject Detection (FOD) method to protect the base station and mobiledevice from overheating in the presence of a metallic foreign object. Itmanages fault conditions associated with power transfer and controlsstatus LEDs to indicate operating modes.


  •  5W Solution for Wireless Power Consortium (WPC)-compliant power transmitter design A5/A11
  •  Conforms to WPC specification version 1.1 specifications
  •  5V Operating Input Voltage
  •  Uses External Full-Bridge Inverter.
  •  Closed-Loop Power Transfer Control between
  • Base Station and Mobile Device
  •  Demodulates and Decodes WPC-Compliant
  • Message Packets
  •  Integrated RESET Function
  •  Proprietary Back-Channel Communication
  •  I2C Interface
  •  Open-Drain LED Indicator Outputs
  •  Over-Temperature/Current Protection
  •  Security and Encryption up to 64 bits
  •  Foreign Object Detection (FOD)Note: input buck inductor-ACM4520-901-2P-T000


  Order Code SPEC Product series Compliance Bauform L
RDC max.
Q Samples
760308111 PDF WE-WPCC Wireless Power Transfer Transmitter Coil Qi - A11; MP-A11 53 x 53 x 6 mm 6.3 200 13 25 20 80