60A DC-DC converter adjusts input over-current limits

60A DC-DC converter adjusts input over-current limits

New Products |
By Nick Flaherty

TDK has expanded its TDK-Lambda i7A series of non-isolated buck DC-DC converters with a 60A, 400W version with adjustable input over-current limits.

The DC-DC converters have the industry-standard 1/16th brick pinout and the 60A output models have a 400W maximum rating, offering 0.8 – 8V adjustable outputs from a 12V nominal input.

There is also now an option to adjust the over-current limit on all input voltage and output current models to reduce the stress on the converter when exposed to excessive overload conditions. This also helps fine tune the over-current limits based on actual system needs.

The 60A i7A models can be used to derive additional high-power outputs from a 9 to 18Vdc power supply at a lower cost and higher efficiency than isolated DC-DC converters. These very compact products are suited for use in mobile robotics, drones, medical, industrial, test, measurement, communications, computing, and portable battery-powered equipment.

Efficiencies of up to 97% reduce internal losses and allow the 60A i7A to operate in ambient temperatures of -40°C to +125°C, even with low airflow conditions. The design provides low output ripple and excellent response to dynamic loads.

Like the 33A and 45A versions, the 60A provides a choice of three mechanical configurations, measuring just 34mm wide and 36.8mm long. 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 for convection or forced air cooling are 24.9mm high.

The i7A 60A standard features include output voltage adjustment, + remote sense, negative logic remote on-off, input under-voltage, over-current and over-temperature protection. Evaluation boards are available for simplified qualification.

All models have safety certification to the IEC/UL/CSA/EN 62368-1 standards, with CE and UKCA marking to the Low Voltage and RoHS Directives.


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