Panasonic Wireless Charging Reference Design

summary

The Panasonic Wireless Power Control IC supports all devices (DSC, DVC, Walkman, mobile phone, smartphone, etc.) and is compliant with the WPC 1.1 (Qi standard) of the WPC (Wireless Charging Alliance). The Panasonic wireless power solution uses a transmitter control IC (NN32251A) for power transmitters (battery chargers) and a receiver control IC (AN32258A) for power receivers (devices) to control power transmission.

Panasonic wireless charging solution

Panasonic Wireless Power Solutions

NN32251A (Power Transmitter (Tx) IC)

Built-in charge-and-bounce boost DCDC converter controller

Half bridge door drive: 4 channels (full bridge door drive: 2 channels can also be configured)

Support single coil (A11 type)

Free positioning is extended with multiple coils of up to 4 coils. (Type A6)

High precision voltage and current monitoring of the inverter

Control the output using the frequency, operating state, or voltage defined in Qi

ASK demodulation of current and voltage signals (according to Qi standard)

Input voltage range: VADP: 4.6 V to 19.5 V, VINV: 4.0 V to 19 V

Support undervoltage lockout, thermal shutdown and overvoltage detection

Inverter output short circuit protection

Temperature detection circuit: 3 way

LED indicator: 2 way

Package: 64-pin HQFP (size: 12 mm x 12 mm)

AN32258A (Power Receiver (Rx) IC)

Synchronous full bridge rectification control

Input voltage range: VRECT : 4.4 V to 19 V

Optional output voltage: 5 V

Temperature detection circuit

Full charge detection with adjustable current levels

Switching control of external power supply

Support undervoltage lockout, thermal shutdown, overvoltage detection and overcurrent detection

LED indicator

I2C interface

Package: 48-pin WLCSP (size: 3.16 mm x 3.16 mm, 0.4 mm pitch)

Development kit

NN32251A Development Kit (Tx)

Launch module image of the NN32251A development kit
Launch module image of the NN32251A development kit

AN32258A Development Kit (Rx)

Receiver module image for AN32258A development kit
Receiver module image for AN32258A development kit

Characteristics

Supports a variety of wireless charging based on WPC 1.1 (Qi standard) devices.

Abnormal detection of the charging process and various protection functions ensure safety and reliability.

Supports a maximum 5W output within the standard range for fast charging.

Provides efficient control of external low-impedance MOSFETs, reducing power consumption and heat generation. (AN32258)

A solution including a Panasonic coil and peripheral circuitry is provided to achieve a short theoretical time of arrival (TAT) design.

application

Panasonic wireless charging application example

For Honor Glass

Dongguan Jili Electronic Technology Co., Ltd. , https://www.jlocaglass.com