Features and schematic diagram of wireless charger solution

2021-01-05 16:19:12

Features and schematic diagram of wireless charger solution

The development of wireless charging technology has been extensively studied and applied in the electronic field. Although it has not been widely promoted, it has achieved good results in the field of consumer electronics. Mobile phone manufacturers have also added innovative advanced charging technology to their flagship phones, such as Samsung S6, Sony Xperia Z3, Google Nexus 6, Nokia Lumia 930 and other mobile phones using wireless charging technology. So, what is the future of wireless charging technology? What is the common wireless charging solution now, let us understand the following:


1. Wireless Power Consortium (WPC): electromagnetic induction

Before the commercialization of the WPC Qi standard, there are currently 172 member companies: Texas Instruments (Ti), Philips, Carl, Freescale, Toshiba, Toshiba, Microsoft, Panasonic, Samsung, Sony, Qualcomm, etc.

The Wireless Power Consortium (WPC), along with the wireless charging standard, uses electromagnetic induction. But this technology has many defects, such as only 5W maximum output power, so the charging speed will be very limited.

From the perspective of market size, Qi is undoubtedly the most popular. It is worth noting that the latest Qi standard can achieve a wireless charging distance of 7 to 45 mm, which is a small breakthrough.

Advantages and disadvantages of electromagnetic induction technology in gas phase marking:

Advantages: simple principle and easy production.

Disadvantages: severely limited transmission distance

The following example is as follows:

1. TI (TI): The earliest wireless charging solution company

The first one: Titanium (TI), one of the main members of WPC, launched the industry's first wireless power control chipset. The chip contains a single bq500110 channel emission control chip and a single channel bq51013 control chip. TI is the earliest wireless charging solution company.

The second type:

1. 15V input source:

(1) Function description:

The second-generation digital wireless power control transmitter is used to charge portable devices such as mobile phones. Input 5V DC and output 10V AC. It can find WPC compatible devices, will provide, receive data packets from the power device, and manage power transmission.

(2) Important features:

The dynamic power limit (DPL) complies with the standards of the Radio Operations Consortium (WPC) A5 and A11 transmitters for 5V operation and digital demodulation, reducing components, combining charge status and fault indication.

2. 12V input transmitter:

(1) Function description:

TI's free positioning wireless charging transmitter is suitable for WPC 1.1 mobile phone, car and desktop charging. Three coil emission array: charging area> 70mm×20mm, 12V DC input, 5V AC output intelligent control, wireless power transmission.

(2) Important features:

In line with the technical indicators of the Wireless Power Alliance (A6) A6 transmitter, external target detection enhances parasitic metal detection to ensure safe digital demodulation over-current protection.

3,5V output receiver

(1) Function description:

The wireless power transmission receiver provides a 5V regulated power output for wireless charging on portable devices.

(2) Important features:

93% overall peak DC efficiency and WPC V1.1 standard line for communication control output voltage regulation, internal integrated rectifier, low voltage step-down regulator, digital control for high temperature power failure.