All-in-one PMIC solutions for wireless earbuds

Samsung MUA01 MUB01

The new PMICs integrate multiple discrete components in one chip to make room for longer battery life and more efficient designs in today’s True Wireless Stereo devices

Samsung Electronics announced the industry’s first all-in-one power management integrated circuits (PMIC), MUA01 and MUB01, optimized for today’s True Wireless Stereo (TWS) devices.

Samsung - MUA01, MUB01

Unlike wireless headphones, TWS earbuds have no wire that connect the two earpieces. Without the connecting wires, TWS devices present users with more freedom in movement and range on their day-to-day activities. However, like other mobile devices, long battery life and small form factors are key requirements to these wireless earbuds.

The MUA01 and MUB01 PMICs have respectively been designed for the charging case and the earbuds, and are one-of-a-kind fully-integrated solutions optimized for TWS devices. By combining several of the company’s in-house logic technologies, Samsung was able to integrate up to ten discrete components into one, including switching chargers and discharge circuits, enabling the PMICs to occupy less than half the space compared to previous alternatives. The compact solutions can allot more room to the battery for longer playback time and enable more flexible and efficient designs.

The MUA01 is also the industry’s first solution to support both wireless and wired charging in a single chip. For wireless charging, it supports 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. In addition, MUA01 comes with a microcontroller unit (MCU) and embedded Flash (eFlash), offering the option of modifying its firmware to support other applications.

With power line communication (PLC) support, the new PMICs can communicate with each other over the charging pins. This allows the charging case and ear pieces to share essential information such as battery levels and whether the ear pieces are inserted in the case.

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

JLCPCP: 2USD 2Layer 5PCBs, 5USD 4Layer 5PCBs

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