12V Wireless Power

Transmitter IC for TX-A6

Product Datasheet

P9036B

Revision 1.0.0

Features

 5W WPC 1.2 Compliant Wireless Power

Transmitter Single Chip Solution for TX-A6



Excellent EMI performance eliminates

need for EMI filters

 12V Operating Input Voltage

 Closed-Loop Power Transfer Control Between

Base Station and Mobile Device

 Demodulates and Decodes WPC-Compliant

Message Packets

 5V Regulated DC/DC Converter

 Integrated RESET Function

 Internal half-bridge power MOSFETs

 Proprietary Back-Channel Communication

 I

C Interface

 Push-Pull GPIO/LED Indicator Outputs

 Over-Temperature Protection

 Optional Buzzer Support

 Foreign Object Detection (FOD)

Applications

 WPC-Compliant Wireless Charging Base

Stations

Package: 6x6-48 TQFN

Description

The P9036B is a highly integrated WPC-compliant wireless power

transmitter IC for power transmitter WPC design TX-A6. This device

operates with a 12Vdc adaptor, and drives an external load directly via

an internal half-bridge. It controls the transferred power by changing the

switching frequency of the half-bridge inverter from 110 kHz to 205 kHz

as specified by the WPC specification for an “A6” transmitter. It

contains logic circuits required to demodulate and decode WPC-

compliant message packets sent by the mobile device to adjust the

transferred power.

The P9036B is an intelligent device, which manages mobile device

detection, and selection of one of the three coils of the A6 transmitter

coil without user supervision. The A6 configuration allows free mobile

device positioning over a wider area than configurations that use a

single coil, detecting a mobile device for charging while minimizing idle

power. Once the mobile device is detected and authenticated, the

P9036B continuously monitors all communications from the mobile

device, and adjusts the transmitted power accordingly by varying the

switching frequency of the internal half-bridge inverter.

The P9036B can optionally support a proprietary back-channel

communication mode, which enables the device to communicate with

IDT’s wireless power receiver solutions. This feature enables additional

layers of capabilities beyond the standard WPC requirements.

The P9036B includes over-temperature/current protection and WPC

compliant Foreign Object Detection (FOD) to protect the base station

from overloading in the presence of a metallic foreign object.

Additionally, it manages fault conditions associated with power transfer

and controls LED outputs to indicate operating status.

Mobile Device

Receiver

Output Load

Control System

Power Pick-Up

Comm Cont

Mod

Sensing

Control

Out

PWR

Base Station

Transmitter(s)

Input Power

Control System

Power Generation

Comm

Cont

DeMod

PWR

Sensing

Control

Induction

Load

Reflection

Comm

Control

Wireless

Interface