Customized Power Wireless Charger Coil 7uH 5V Transmitter Receiver Induction Shield For Samsung Apple Smart Mobile Phone

Customized Power Wireless Charger Coil 7uH 5V Transmitter Receiver Induction Shield For Samsung Apple Smart Mobile Phone

Quick details

Aolittel wireless charging receiving coils/shields and wireless charging transmitter coils/shields feature high permeability shielding and high-saturation powdered iron that is not affected by permanent locating magnets. All the parts are lead (Pb)-free and RoHS-compliant, and some are also AEC-Q200-qualified.

Specifications

FEATURES

• Wireless charging receiving coil
• For Rx applications up to 10 W
• Optimized for 5 V charging circuitry
• High permeability shielding for wireless charging receiving coils
• Blocks charging flux from sensitive components or batteries
• High saturation powdered iron - not affected by permanent locating magnets
• Durable construction

SHIELD MATERIAL CHARACTERISTICS

• Permeability: approximately 24
• Resistivity: > 10 MW at 100 V
• Core loss: 4000 mW/cc at 500 gauss, 250 kHz
• Magnetic saturation: 50 % at 4000 gauss (to 350 Oe)

Introduction

There are many battery-powered devices, which need to be periodically charged, such as mobile phones, tablets, and battery-powered hand tools. These tools are usually charged by a dedicated cord from a USB port or from a dedicated wall adapter.

Wirelessly transferred power simplifies the charging of these devices and brings more convenience to the everyday lives of our customers. Dedicated controllers are required for wireless charging application control. Freescale provides the Axx family of the dedicated controllers for the wireless charging applications. Each type is intended for a certain range of applications in the automotive or industrial and consumer area. Freescale provides the dedicated wireless charging software library
intended for these controllers. This library maintains all functions required by the Qi specification.

Coil categories

Each application area requires a certain level of power transfer. The main aspects of the categorization are
as follows:

· Transmitter or receiver side:
o The transmitter side generates the power electromagnetic field.
o The receiver side produces the AC/DC current when placed to the power electromagnetic field.

· A level of the transferred power:
o Low power – up to 5 W on the receiver side
o Medium power – from 5 W to 100 W
o High power – from 100 W to 1 kW level
o Very high power – more than 1 kW

· Free-positioning:
o Single coil – with or without an attractor
o Multicoil solution

· Manufacturing:
o Wire wound from the Litz wire
o PCB type of coils

Coil description and properties

The requirements for the coil construction are as follows:

 The inductance and power capability must meet the category requirements, including the working frequency and transferring power.

 The mechanical dimension must fit to the target application, including the coil area and thickness.

 The coil must provide the electromagnetic shielding for the associated electronic device, such as the mobile phone.

 Durable construction.

Figure 1 shows the basic wire wound coil structure

The use of the A or other controllers from the A family, together with the binary wireless charging library considerably simplifies the whole design process and provides fully tested functions for a reliable application.