Tiny AC/DC converters power smart electronics in small spaces

RECOM's latest low-power, energy-efficient AC/DC converters are now available from Dengrove Electronic Components. They are small enough to fit inside existing cavities such as inside switch housings or behind cover plates, making them ideal for smart-building or IoT applications, says the company. The 2W and 3W RAC02-SE/277 and RAC03-SE/277 are housed in a compact 34mm x 22mm package only 11mm high. A third option, the 3W RAC03-SER/277 in a circular package, gives extra flexibility to implement smart electronics inside small spaces. All types carry IEC/EN60335 and IEC/EN60950 safety certifications, allowing use in household or industrial environments, and are CE marked. The converters operate at up to 80% efficiency, and are available with output voltage of 3.3V, 5V, 12V or 24V, making them ideal for powering remote sensors or actuators, climate controls, touchscreen interfaces, access-control devices, wireless alarm systems, door-openers or similar equipment. No-load power consumption of 30mW is less than one-twelfth of the applicable European ErP standby power limit, which helps ensure compliance of the end product. Further valuable features of these new converters include a wide input-voltage range of 85VAC - 305VAC, which permits connection to any AC line voltage globally and allows equipment to withstand supply fluctuations such as surges or brown-outs. The output voltage is highly stable, regulated within ±6% and with less than 200mV ripple. The safety both of equipment and users are also highly protected. Isolation of 3kV/1min. and leakage current of less than 10µA minimise risk of electric shock, and the converters feature built-in over-voltage protection and short-circuit protection with automatic restart when the fault is removed. There is also an integrated EMI filter, and the devices comply with EN55022 Class B. In addition, the high-reliability devices offer a wide ambient operating-temperature range of -40C to 85C, says the company.