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Power Electronics Europe News
Nordic Semiconductor’s PMIC for wearable devices is available at Farnell

Distributor Farnell is now shipping the PMIC which has a low PCB area usage of jus 23mm². The small form-factor PMIC can be used in space-constrained applications including battery charging and power delivery in handheld, portable and advanced wearable wireless products and connected medical devices, advised the company.

Small wireless product designers have to balance increased battery life and added functionality without increasing the form factor. Adding battery capacity increase physical volume so power efficiency gains are relied on to achieve battery life and functionality improvements.  

The nPM1100 is a dedicated PMIC with a highly efficient dual-mode configurable buck regulator and integrated battery charger. It is designed as a complementary component to the manufacturer’s nRF52 series and nRF53 series of SoCs, which enable reliable power delivery and stable operation while maximising battery life through high efficiency and low quiescent currents. The nPM1100 can also be used as a generic PMIC device.

According to Farnell, the PMIC’s combining the USB battery charging and power supply with a compact PCB implementation, including passives, offers up to 92% power conversion efficiency

The integrated battery charger is designed to charge lithium-ion and lithium-polymer batteries on a termination voltage selectable to 4.1 or 4.2V. It supports cell chemistries with a nominal voltage of 3.6 and 3.7V respectively.

There is automatic selection of three charging modes: automatic trickle, constant current and constant voltage.

The PMIC is compatible for charging batteries through a USB with automatic port detection.

Simon Meadmore, vice president of product and supplier management at Farnell, says: “The need for innovative and compact professional wearable wireless devices and connected applications for medical use is growing exponentially. Connected medical devices for use in hospitals or patient homes offer many new opportunities. This new PMIC gives designers a new weapon for increasing power delivery and efficiency in an economic, ultra-low form factor package.”

Farnell, an Avnet company operates as Newark in North America and element14 in APAC.

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