Analog Devices (distributed in Australia by Avnet) said it has expanded its portfolio of AEC-Q100 products with quad-channel digital isolators with integrated, isolated power for hybrid-electric vehicle (HEV) motor drives and battery management systems. 

The devices incorporate Analog Devices' isoPower integrated, isolated DC-to-DC converter technology.

The ADuM540xW digital isolators were designed using the company's iCoupler chip-scale micro-transformer technology, and they incorporate its isoPower integrated, isolated DC-to-DC converter technology, which provides up to 500 mW of regulated, isolated power at 5 V output.

The AEC-Q100 isoPower isolators provide multiple isolation channels in a variety of channel configurations and supports data rates up to 25 Mbps. The CMOS-based ADuM540xW family operates with the supply voltage on either side ranging from 4.5 V to 5.5 V.

The ADuM540xW isoPower digital isolators are well suited to operate with other Analog Devices’ components, including the AD7280 lithium-ion battery monitoring system and ADuM120xW, ADuM130xW and ADuM140xW digital isolators.

In an HEV application, this level of integrated isolation allows for power to be transferred across an isolation barrier ensuring monitoring of the battery without drawing from the battery’s power. The 10 mm x 10 mm surface-mount packages of the ADuM540xW devices reduce the component count of discrete solutions to a single component, reducing board space by up to 70 per cent.

Analog Devices said the growing popularity of electric and hybrid-electric vehicles is placing new emphasis on the need for battery management to monitor voltage levels and provide car makers with the means to reduce battery weight, size and cost. Because HEV batteries operate at high voltages of up to 600 V, isolation is required for safe and reliable operation.