30 January 2019
Power Electronics / Power Management
The ultra-low-power MAX20345 from Maxim Integrated Products provides a way for designers of always-on wearable and Internet of Things (IoT) devices to extend battery runtime while shrinking form factor. It integrates a lithium charger and debuts a unique architecture that optimises the sensitivity of optical measurements for wearable fitness and health applications.
In wearables, optical sensing accuracy is impacted by a variety of biological factors unique to the user. Designers have been striving to increase the sensitivity of optical systems, in particular the signal-to-noise ratio (SNR), to cover a broader spectrum of use cases.
Traditional low-quiescent-current regulators favoured in wearable applications come with trade-offs that degrade SNR on the wrist, such as high-amplitude ripple, low-frequency ripple and long settling times. Some designers have even turned to high-quiescent-current alternatives to overcome these drawbacks, but they must deal with increased power consumption, which reduces battery runtime or requires a larger battery.
The MAX20345 features a first-of-its-kind buck-boost regulator based on an architecture that’s optimised for highly accurate heart-rate, blood-oxygen (SpO2) and other optical measurements. The regulator delivers the desired low-quiescent-current performance without the drawbacks that degrade SNR and, as a result, can increase performance by up to 7 dB (depending on measurement conditions).
The chip integrates a lithium-ion battery charger; six voltage regulators, each with ultra-low quiescent current; three nanoPower bucks (900 nA typical) and three LDO regulators with quiescent current as low as 550 nA typical. Two load switches allow disconnecting of system peripherals to minimise battery drain. Both the buck-boost and the bucks support dynamic voltage scaling (DVS), providing additional power-saving opportunities when lower voltages can be deployed under favourable conditions.
The MAX20345 is available in a 56-bump, 0,4 mm pitch, 3,37 x 3,05 mm wafer-level package (WLP).
Reliable power solution Conical Technologies
Power Electronics / Power Management
The Mibbo MLD-120W-xxVx is a robust DIN-rail mounted DC-DC converter with a 120 W output capacity specifically designed for industrial and automation applications.
Read more...Easing the path for IPPs navigating local energy regulations
Power Electronics / Power Management
Independent Power Producers (IPPs) and developers venturing into South Africa’s renewable energy sector face an onerous and challenging regulatory landscape characterised by uncertainty in securing grid connections and considerable development costs.
Read more...Wide input voltage buck-boost converter Altron Arrow
Power Electronics / Power Management
The MAX77859 from Analog Devices is a high-efficiency, high-performance buck-boost converter targeted for systems requiring a wide input voltage range of between 2,5 and 22 V.
Read more...Development kit for TI’s SN6507
Power Electronics / Power Management
This comprehensive solution is designed to help engineers evaluate the performance of TI’s SN6507 transformer driver for isolated power supplies.
Read more...High-voltage IGBT Hi-Q Electronics
Power Electronics / Power Management
Diotec Semiconductor has launched the DIW030M060 IGBT, a 600 V, 30 A device with a built-in reverse diode.
Read more...DC converter for Hi-Rel applications Vepac Electronics
Power Electronics / Power Management
The MFK2812S from Crane Aerospace & Electronics is a DC-DC converter with an input voltage range of 16 to 50 V and an output of 12 V at up to 2,08 A.
Read more...Distributed Energy Resource Management Systems Schneider Electric South Africa
Power Electronics / Power Management
In addition to grid stability, DERMS also play a role in energy trading with some countries leveraging DERMS for real-time energy trading.
Read more...BYD introduces new energy storage solutions
Power Electronics / Power Management
BYD Energy Storage, a business division of BYD, has introduced the new BYD Battery-Box LV5.0+ at the recent Solar & Storage Live Africa in Johannesburg.
printer friendly version