Integrated PMIC for wireless ear buds boosts battery size

March 24, 2020 //By Nick Flaherty
Samsung Electronics has launched two all-in-one wireless charging power management integrated circuits (PMIC) for True Wireless Stereo (TWS) earbuds.
Samsung Electronics has launched two all-in-one wireless charging power management integrated circuits (PMIC) for True Wireless Stereo (TWS) earbuds.

The MUA01 and MUB01 PMIC devices connects the two earpieces using power line communications (PLC) while charging, and use the Qi wireless charging standard.

The PMIC devices integrate up to ten discrete components into one, including switching chargers and discharge circuits, to occupy less than half the space compared to previous alternatives. The smaller footprint allows more room to the battery for longer playback time and enable more flexible and efficient designs.

The MUA01 is also the industry’s first design to support both wireless and wired charging in a single chip, says Samsung. For wireless charging, it supports the Wireless Power Consortium’s (WPC) Qi 1.2.4, the consortium’s latest wireless power transfer interface standard. To provide efficient power management, the MUA01 integrates a highly effective switching charger, microcontroller and embedded Flash (eFlash), offering the option of modifying its firmware to support other applications.

Samsung electronics MUA01 and MUB01

With power line communication support, the PMIC devices can communicate over the charging pins. This allows the charging case and earpieces to share essential information such as battery levels and whether the earpieces are inserted in the case.

“TWS earbuds present elevated listening experiences for more users and the trend is rapidly expanding the mobile accessory market, creating new opportunities for device manufacturers,” said Dong-ho Shin, senior vice president of System LSI marketing at Samsung Electronics. “Samsung’s industry-first, all-in-one power management solutions optimized for TWS devices will allow manufacturers to craft new applications with greater flexibility.”

The MUA01 and MUB01 are currently in mass production and are featured in Samsung’s recently-announced Galaxy Buds+ TWS earbuds.

www.samsung.com

 


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