Compact surface-mount isolated converters are certified to new international safety standard

21-08-2017 | Dengrove | Power

The latest RECOM R1SX 1W unregulated DC-DC converters are now available at Dengrove Electronic Components and are only 5.5mm high, as well as 20% slimmer than alternative converters. They are also conveniently packaged as compact, 12.75mm x 10.8mm, surface-mount, open-frame modules.

They satisfy EN 55022/024 and IEC/UL/EN 60950-1, and the modules are also certified to the incoming IEC/UL/EN 62368-1 safety specification. IEC 62368-1 introduces a new hazard-based approach to safety engineering that gives designers extra flexibility to demonstrate compliance, and is expected to replace the established IEC 60950-1 rules.

These converters can drive capacitive loads of up to 2200µF, which is claimed to be 40 times higher than comparable alternatives. By also offering 1kVDC or 3kVDC isolation-voltage options, this series presents an ideal solution for isolating CAN-bus connections to ensure equipment safety and preserve signal integrity. They can also be used to power loads in equipment such as industrial automation controllers, without derating, over the full -40C to 100C temperature range.

Variants are available with 3.3V or 5V inputs, and a single unregulated 3.3V or 5V output. Capable of operating at up to 78% efficiency, they also have quiescent consumption of less than 150mW thereby minimising dissipation and easing system thermal management. By adopting an industry-standard pinout, the modules provide a drop-in replacement for the R1S series, with 50% lower mounted height. Class A EMC compliance can be reached without external inductors, and only a simple external filter is needed to achieve Class B compliance.

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