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Fujitsu’s IC’s harness energy from multiple sources simultaneously

Japan’s leading energy harvesting solutions manufacturer, Fujitsu Semiconductor, has unveiled a power management integrated circuit (PMIC) unique in its capability to simultaneously utilise both light and vibration sources. 

The chip, MB39C811, has been released along with its fellow, MB89C31, working together they can provide regulated DC voltage from solar, thermal, or kinetic sources. The devices can help in storing the harvested energy in batteries to power wireless sensor networks, wearable electronics products, and similar applications.

The MB39C811 is a buck type converter with a dual, full-wave bridge rectifier is optimized for high-output impedance energy sources such as piezoelectric transducers or microelectro-mechanical systems (MEMS). The MB39C811 has eight preset output voltages ranging from 1.5V to 5V, and covers continuous output current up to 100mA. Quiescent current is only 1.5 uA.

The MB39C831, meanwhile, is a boost type converter for solar or thermal energy harvesting with maximum power point tracking (MPPT) to charge a Li-Ion battery. The device can charge into a Li-ion battery with a single solar cell and a multi-junction solar cell or thermal electric generator (TEG). The device can extract the maximum power point of the power source and safely charge Li-ion batteries using its protection function. The MB39C831 works from a low voltage of 0.35V making it suitable for single solar cell. “Our two new PMICs are certified by Fujitsu as ‘Super Green’ products, meaning that they have superior environmental characteristics compared to other products on the market,” said Takuya Okajima, senior manager of applications engineering.

Sample shipments for the two new products are scheduled to start in June of this year.


Fujitsu Semiconductor will be exhibiting at Techno-Frontier 2013, Japan's key electronics exhibition. If you would like the opportunity to promote your energy harvesting technology at the exhibition and take part in the UK Energy Harvesting Mission to Japan on 16-21 July 2013, find out more here. Eligible companies will receive a grant to cover up to 50% of relevant costs including travel, accommodation and subsistence, capped at £800.

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