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Posted : 14 Apr 2021
TDK Corporation (TSE 6762) announces the introduction of the 750W rated TDK-Lambda i7A series of non-isolated buck DC-DC converters, packaged in the industry-standard 1/16th brick footprint. The output voltage of these 24V nominal input step-down converters can be adjusted from 3.3V to 18V with a maximum current of 45A.
The i7A models can be used to derive additional high-power outputs from a 24Vdc power supply, at a lower cost and higher efficiency than isolated DC-DC converters. These very compact products are suited for use in robotics, drones, medical, industrial, test, measurement and portable battery-powered equipment.
Efficiencies of up to 98.5% dramatically minimise internal losses and allow the i7A to operate in ambient temperatures of -40°C to +125°C, even with low airflow conditions. The i7A’s design provides a low output ripple and excellent response to dynamic loads. Minimal external components are required, compared to discrete solutions, saving cost and printed circuit board space.
A choice of three mechanical configurations is available, measuring just 34mm wide and 36.8mm in length. The 11.5mm high open-frame model is suitable for applications requiring a low profile. The baseplate version can be conduction-cooled to a cold plate and is 12.7mm high. Models with an integral heatsink, which are for convection or forced air cooling, are 24.9mm high.
The i7A standard features include output voltage adjustment, + remote sense, remote on-off (positive or negative logic available), input under-voltage, over-current and over-temperature protection. Evaluation boards are available.
All models have safety certification to the IEC/UL/CSA/EN 62368-1 standards, with CE marking to the Low Voltage and RoHS Directives.