DC-DC buck converters in
1/16-brick footprint

New models of the i7A series with up to 60 A
and adjustable current limiting

TDK Corporation complements the TDK Lambda i7A series of non-isolated buck DC/DC converters with standard 1/16-brick footprint. The 60 A output models have a 400 W maximum rating, offering 0.8 to 8 V adjustable outputs from a 12 V nominal input.
Power
Video: i7A 750 W, 18 to 60 V Input Non-Isolated Step Down DC-DC Converter
In addition, an option to adjust the over-current limit is now available on all input voltage and output current models. Not only does this feature help reduce stress on the converter when exposed to excessive overload conditions, but it facilitates over-current limit fine-tuning based on actual system needs. The 60A i7A models can be used to derive additional high-power outputs from a 9 to 18 VDC 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.

High efficiency

Efficiencies of up to 97 per cent dramatically minimise internal losses and allow the 60 A i7A to operate in ambient temperatures of -40 °C to +125 °C, even with low airflow conditions. The i7A’s design provides low output ripple and excellent response to dynamic loads. Compared to discrete solutions, minimal external components are required, saving cost and printed circuit board space.

i7A also as open-frame model

Like the 33 A and 45 A versions, the 60 A provides a choice of three mechanical configurations, measuring just 34 mm wide and 36.8 mm long. The 11.5 mm 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 12.7 mm high. Models with an integral heatsink for convection or forced air cooling are 24.9 mm high.

Well protected

The i7A 60 A standard features include output voltage adjustment, + remote sense, negative logic remote on-off, input under-voltage, over-current and over-temperature protection. The new feature set also includes the option of setting the overcurrent limitation. 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. ds
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