Custom PMIC for smartphone fast charging
Chinese smartphone maker Infinix Mobility has developed its first in-house power management PMIC chip for fast charging.
The Cheetah X1 PMIC chip will be the foundation for the new All-Round FastCharge 2.0 in the upcoming Infinix NOTE 40 Series of smartphones.
The chip is designed to address concerns about low battery life and power availability in various usage scenarios, including social media consumption, outdoor activities, and extended gaming sessions.
The chip has three modules. An All-round Support Module accommodates eight charging scenarios and consolidates functions by consolidating protocols and adjusting charge. These eight scenarios include up to 100W multi-speed wired charging, wireless charging, wired reverse charging, wireless reverse charging, bypass charging, AI charging protection for night charging , extreme-temp tech for -20°C, and multi-protocol charging. This integration ensures consistent performance across demanding use cases.
The High-precision Power Monitor Module detects current and voltage in real-time and adjusts charging volume to ensure a balance between charging efficiency and temperature control, so as to protect the battery life and maintain the phone’s health.
The Safety Module integrates 63 protection measures to cover nearly all potential unsafe charging scenarios. These protections are automatically activated through the chip’s monitoring and recognition ability and relay information to other protocols in the phone, which can then be used to alert the user, enhancing user convenience.
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As current flows through the phone, the Cheetah X1 chip eliminates the need for translation processes, and intelligent algorithms assess which components require power and efficiently distribute it, akin to the technology’s brain. This streamlined process enables the smartphone to offer charging functions beyond standard modes.
The company assembled a specialized team to evaluate packaging technology and comprehensive functional integration, resulting in a customized PMIC that uses wafer-level packaging. This reduces the chip size and shortens signal transmission paths and minimizes electrical signal delays, enhancing electrical performance, particularly in high-speed data transmission and high-frequency applications. The company claims the processing efficiency per unit has increased by 204%.
“At Infinix, customer feedback is at the core of our innovation process. With each new generation of our mobile phones, we strive to incorporate this feedback to deliver the best products to our tech-savvy consumers. That’s why we’ve taken the bold step to develop our own chip, elevating our All-Round FastCharge technology to new heights. This allows us to offer cutting-edge functionality in control protocol circuits, charging applications, and AI integrations, all while ensuring safety and reliability. Our commitment is to provide our customers with top-notch phones that excel in functionality and performance,” said Weiqi Nie, Product Director at Infinix.
https://www.infinixmobility.com/
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