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[Interview] Lee Chang-hee, Infineon Director: "Magnetic induction wireless charging devices must comply with the Qi 1.3 standard."
Published2023.02.15 18:07Inductive wireless charging devices must comply with the Qi 1.3 standard.
Encryption authentication function is required when charging over 5W is supported.
Infineon's wireless charging solution supports the Qi 1.3 standard.
Encryption authentication function is required when charging over 5W is supported.
Infineon's wireless charging solution supports the Qi 1.3 standard.
[Editor's Note] The number of devices adopting wireless charging, such as smartphones, IoT devices, and electric vehicles, is increasing. The wireless charging market size is growing by about 30% every year and is expected to reach about 49 trillion won in Korean currency by 2026. Amid the global interest in wireless charging, various issues such as safety and security are also being raised. Infineon will host a webinar titled "Safe and Efficient Wireless Charging Solution: Introducing Infineon's WLC1115 Microcontroller with Integrated USB-C" on April 18th at 10:30 AM through e4ds news eewebinar. This webinar will briefly review wireless charging technology and trends, explain the functions and features of the WLC1115, and the development environment, and then explain application examples of the solution. Accordingly, we heard from Lee Chang-hee, Director of the PSS Business Unit at Infineon Korea, who is hosting this webinar.
▲Lee Chang-hee, Director of Infineon Korea PSS Business Unit
■ I'm curious about the recent trends in wireless charging technology and what the future holds.
Wireless charging technology can be broadly divided into inductive and resonant methods.
The current market-dominant technology is magnetic induction. While its charging range is extremely short, within a few millimeters, it boasts exceptionally high power efficiency (over 80%) and, as a standard technology of the Wireless Power Consortium (WPC), offers excellent device compatibility. The Qi 1.3 standard, based on magnetic induction, supports rapid charging from 15W to 50W through security certification.
NFC charging technology has recently become the standard for wireless charging, aside from magnetic induction and magnetic resonance. It is suitable for small wearable devices where wireless charging coils are difficult to apply, and can deliver charging powers of up to 1W.
With the recent explosive growth of smartphones and IoT devices and the spread of electric vehicles, the number of devices that support wireless charging is increasing. According to media reports, the wireless charging market is growing by approximately 30% annually and is expected to reach approximately KRW 49 trillion by 2026.
■ What should be considered when developing a wireless charging solution?
First, in terms of certification, inductive wireless charging devices released from 2023 onwards must comply with the Qi 1.3 standard.
Qi 1.3 requires encryption authentication when supporting charging of 5W or more, and the number of authentication test items has increased from 120 to 632, so preparation for this is necessary.
Secondly, from a safety perspective, as the charging power increases, the risk of overheating accidents caused by foreign substances such as metal and the risk of system damage due to high voltage and current increase, so it is necessary to strengthen the protection function against these.
Finally, in terms of compatibility, we must prepare for an increase in the number of interoperability test devices and an increase in test complexity as wireless charging devices increase and wireless charging standards change.
Consumer demand for wireless fast charging is growing. I'm curious to see if Infineon has any solutions for this.
Infineon's wireless charging solution, the WLC1115 microcontroller, supports the Qi 1.3 standard and supports 5W in Base Power Profile (BPP) mode and 15W in Extended Power Profile (EPP) mode. It also supports fast charging up to 50W through Proprietary Power Delivery Extensions (PPDE) mode, which is a proprietary protocol for each manufacturer.
It supports system protection functions such as the Foreign Object Detection (FOD) mechanism that reduces or blocks charging power when a foreign object is detected as a protection function for rapid charging, Over Voltage Protection (OVP), Over Current Protection (OCP), Over Temperature Protection (OTP), and Under Voltage Lock Out (UVLO).
Additionally, it supports Qi 1.3 security authentication function in conjunction with Infineon OPTIGA™ Trust Charge solution.
■ Please tell us about the scope of application and special features of Infineon's wireless charging solution.
Infineon's wireless charging solution, WLC1115, can be applied to various wireless charging transmission systems supporting Qi 1.3.
Turnkey development of USB-C chargers and wireless chargers is possible with Infineon's AC-DC power solution, PAG1, and wireless charging capabilities can be added to USB-C monitors or docking stations with Infineon's USB-C PD MCU solution, PMG1.
Additionally, when used with Infineon's USB-C PD source controller, the CYPD7171 solution, it is possible to develop a wired/wireless charging system that enables power load sharing.
Infineon's wireless charging solution WLC11The special features of 15 include cost-effectiveness in terms of hardware as it has its own USB-C controller, Buck-Boost, LDO (Low Drop Output), and gate driver, and can be effectively configured as a system in conjunction with Infineon's excellent MOSFET and security solutions.
On the software side, the integrated development environment, ModusToolbox™, and wireless charging SDK provide flexible support for compatibility issues and facilitate development of PPDE, a manufacturer-proprietary protocol.
Lastly, it supports firmware update functions and allows for Foreign Object Detection (FOD) and various system settings using the Configuration Utility, making it ideal for development and maintenance.
■ Please give a brief introduction of the content you will present in the upcoming e4ds webinar and a word to our readers.
In this webinar, we will briefly introduce wireless charging technology, describe the features and characteristics of Infineon's WLC1115 wireless charging solution with integrated USB-C, and explain the development environment. We will then introduce how to apply the solution in various applications.
We've prepared this webinar to help those interested in wireless charging and those developing related solutions.
We hope many of you will attend.
Wireless charging technology can be broadly divided into inductive and resonant methods.
The current market-dominant technology is magnetic induction. While its charging range is extremely short, within a few millimeters, it boasts exceptionally high power efficiency (over 80%) and, as a standard technology of the Wireless Power Consortium (WPC), offers excellent device compatibility. The Qi 1.3 standard, based on magnetic induction, supports rapid charging from 15W to 50W through security certification.
NFC charging technology has recently become the standard for wireless charging, aside from magnetic induction and magnetic resonance. It is suitable for small wearable devices where wireless charging coils are difficult to apply, and can deliver charging powers of up to 1W.
With the recent explosive growth of smartphones and IoT devices and the spread of electric vehicles, the number of devices that support wireless charging is increasing. According to media reports, the wireless charging market is growing by approximately 30% annually and is expected to reach approximately KRW 49 trillion by 2026.
■ What should be considered when developing a wireless charging solution?
First, in terms of certification, inductive wireless charging devices released from 2023 onwards must comply with the Qi 1.3 standard.
Qi 1.3 requires encryption authentication when supporting charging of 5W or more, and the number of authentication test items has increased from 120 to 632, so preparation for this is necessary.
Secondly, from a safety perspective, as the charging power increases, the risk of overheating accidents caused by foreign substances such as metal and the risk of system damage due to high voltage and current increase, so it is necessary to strengthen the protection function against these.
Finally, in terms of compatibility, we must prepare for an increase in the number of interoperability test devices and an increase in test complexity as wireless charging devices increase and wireless charging standards change.
Consumer demand for wireless fast charging is growing. I'm curious to see if Infineon has any solutions for this.
Infineon's wireless charging solution, the WLC1115 microcontroller, supports the Qi 1.3 standard and supports 5W in Base Power Profile (BPP) mode and 15W in Extended Power Profile (EPP) mode. It also supports fast charging up to 50W through Proprietary Power Delivery Extensions (PPDE) mode, which is a proprietary protocol for each manufacturer.
It supports system protection functions such as the Foreign Object Detection (FOD) mechanism that reduces or blocks charging power when a foreign object is detected as a protection function for rapid charging, Over Voltage Protection (OVP), Over Current Protection (OCP), Over Temperature Protection (OTP), and Under Voltage Lock Out (UVLO).
Additionally, it supports Qi 1.3 security authentication function in conjunction with Infineon OPTIGA™ Trust Charge solution.
■ Please tell us about the scope of application and special features of Infineon's wireless charging solution.
Infineon's wireless charging solution, WLC1115, can be applied to various wireless charging transmission systems supporting Qi 1.3.
Turnkey development of USB-C chargers and wireless chargers is possible with Infineon's AC-DC power solution, PAG1, and wireless charging capabilities can be added to USB-C monitors or docking stations with Infineon's USB-C PD MCU solution, PMG1.
Additionally, when used with Infineon's USB-C PD source controller, the CYPD7171 solution, it is possible to develop a wired/wireless charging system that enables power load sharing.
Infineon's wireless charging solution WLC11The special features of 15 include cost-effectiveness in terms of hardware as it has its own USB-C controller, Buck-Boost, LDO (Low Drop Output), and gate driver, and can be effectively configured as a system in conjunction with Infineon's excellent MOSFET and security solutions.
On the software side, the integrated development environment, ModusToolbox™, and wireless charging SDK provide flexible support for compatibility issues and facilitate development of PPDE, a manufacturer-proprietary protocol.
Lastly, it supports firmware update functions and allows for Foreign Object Detection (FOD) and various system settings using the Configuration Utility, making it ideal for development and maintenance.
■ Please give a brief introduction of the content you will present in the upcoming e4ds webinar and a word to our readers.
In this webinar, we will briefly introduce wireless charging technology, describe the features and characteristics of Infineon's WLC1115 wireless charging solution with integrated USB-C, and explain the development environment. We will then introduce how to apply the solution in various applications.
We've prepared this webinar to help those interested in wireless charging and those developing related solutions.
We hope many of you will attend.
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