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Smartphone battery protection & fast-charging

Magnachip Semiconductor has launched a new generation of Low-Voltage Metal Oxide Semiconductor Field Effect Transistors (LV MOSFETs) featuring lower Rss(on)* for battery Protection Circuit Modules (PCMs) in smartphones.

As demand for high-end 5G and LTE smartphones increases, extended battery life and strengthened protection features for batteries are becoming more important. 5G phones, in particular, need long-lasting batteries with high endurance to process the large amount of data for fast download and upload.

Magnachip has developed a new generation LV MOSFETs with advanced overvoltage and overcurrent protection features to extend battery life and reduce overheating issues. The company began mass production of this new 6.5th generation (6.5G) product at the end of last year, and it is being used in a new 2022 flagship model from one of the world’s largest smartphone manufacturers.

The Rss(on) of this 6.5G product is 20% lower than the previous version with the same chip size to reduce current loss and improve heat dissipation. This lower Rss(on) controls a high power density above 25W to prevent a battery from overheating and protect the PCM while the battery is being fast-charged. Also, PCM functionality has been greatly enhanced with the addition of an upgraded Electrostatic Discharge (ESD) protection diode. This diode mitigates a maximum of 2kV, based on the human-body model, of ESD to strengthen circuit protection and prevent damage to other smartphone components. Along with this powerful battery protection, the size of chip was also significantly reduced to better meet the requirements of new smartphone models.

According to Omdia, a market research firm, the global smartphone market will grow 6.3%, with more than 1.4 billion units sold in 2022. The wireless earphone market is also rapidly growing, which will further drive up the demand for LV MOSFETs.

“Despite the current global chip shortage, we are confident that we can maintain a strong supplier capability for our customers as an integrated device manufacturer for these new 6.5G products,” said YJ Kim, CEO of Magnachip. “We will continue to maintain a close rapport with our existing customers and expand our presence in the global market at the same time.”

Author
Neil Tyler

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