MagnaChip looks to enhance 5G/LTE smartphone battery life and protection

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MagnaChip Semiconductor, a designer and manufacturer of analogue and mixed-signal semiconductor products, has launched a low-Rss(on) LV (Low Voltage) MOSFET with reduced chip size for smartphone battery PCMs (Protection Circuit Modules).

Extended life and increased protection for batteries in high-end LTE and 5G smartphones are becoming increasingly important. 5G phones, in particular, need longer-lasting batteries with higher endurance than was the case with previous smartphones to process the massive amount of data with extremely fast download and upload capabilities. Inserted in the battery PCMs in LTE or 5G phones, this new MOSFET is intended to prevent over-voltage and over-current of the batteries and ultimately helps extend their life and resolve the overheating issue.

The Rss(on) of this product is 20 percent lower than in previous versions with the same chip size, and so prolongs the life of smartphone batteries by decreasing current loss and improving heat dissipation. This lower Rss(on) also enables higher-power density than previous versions to prevent over-heating of the battery during a quick charge (a feature supported by most of the latest smartphones).

PCM functionality is also enhanced by an ESD (Electrostatic Discharge) protection diode added to the product. This mitigates ESDs of ≤ 2 kV to strengthen circuit protection and prevents damage to other smartphone components.

MagnaChip has also succeeded in reducing the chip size of this MOSFET by 10 percent (as compared to other LV MOSFETs currently on the MagnaChip portfolio), which offers greater design flexibility for circuit designers and even shrinks the PCM itself. With this reduction in size, WLCSP (Wafer Level Chip Scale Package) is possible for this product.

“Quick charging, fast processor speeds and other advanced specifications for new LTE and 5G smartphones require power products that provide superlatively high levels of battery protection,” said YJ Kim, CEO of MagnaChip. “We are working closely with the OEM community to decrease the footprint of our MOSFETs and incorporate other product enhancements to meet these objectives.”