Shrink Bluetooth Music Headsets With New Power Solution


Maxim has announced a compact battery charging and power solution for small, lithium-ion battery-operated devices including bluetooth headphones, activity monitors, smart garments, smartwatches, etc. The new power management ICs (PMICs) are said to help designers increase battery life and efficiency of these products.

Most PMICs for small, lithium-ion battery-operated devices such as hearables and wearables require additional components, such as boost, buck, and low dropout (LDO) regulators, a charger, and current regulators for LED indicators. To overcome such challenges, Maxim said it has integrated all these functions into a chip measuring only 19.2mm² – less than 1/2 the size of existing solutions.

To reduce total solution size, the MAX77650 and MAX77651 feature single inductor multiple output (SIMO) buck-boost regulators that provide three independently programmable power rails from a single inductor, 150mA LDO, and three current sink drivers.

For design flexibility, the MAX77650 operates up to 3.3V and the MAX77651 operates up to 5V. Both chips include an analog multiplexer (MUX) output for safe battery monitoring, ideal for low-power designs.


Maxim says that the new chips have the lowest standby power at 0.3µA and 5.6µA operating current.

The MAX77650 offers a lot of functionality for highly integrated wearable products, which allows us to make the next leap in reducing the size of Bluetooth music headsets,” said Tjapko Uildriks, CEO, Dopple B.V. “The MAX77650 integrates many essential power management features typically found in advanced wearable products, enabling Dopple to build high-quality Bluetooth music headset platforms.”

“Demand for consumer battery management ICs is expected to grow at a CAGR of 5% from 2017 to 2020,” said Richard Eden, Senior Analyst, Power Semiconductors, IHS Markit Technology. “Among consumer applications, battery management for wearables – which includes hearables – shows the fastest CAGR of 29% over the same 3-year period.”

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Commented Scott Kim, Executive Business Manager, Mobile Power, Maxim Integrated. “While we optimized the MAX77650 and MAX77651 for small battery size, we also include numerous factory programmable options that allow our customers to tailor these solutions to their requirements and get to market faster.”

The MAX77650 / MAX77651 are available from stock and priced at $1.99 (1,000-up, FOB USA). Evaluation kits namely MAX77650EVKIT# and MAX77651EVKIT# are also available and priced at $193.63 each.

For further details, view the full Press release.




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