Up to 20A or 500W from 1/16 brick dc-dc converter

TDK has added 20A 500W models to its i7A range of non-isolated 1/16 brick dc-dc buck converters.

All of the 20A output models, called i7A48020A033V, can operate from inputs across 28 to 60V and deliver an adjustable 3.3 to 32V – output voltage range is restricted at some input voltages, and set by an external resistor.

Efficiency is up to 96%, and maximum output power depends on available cooling. Ambient air limits are -40 to +125°C.

There are seven of them, with the same power section and 34 x 36.8mm footprint, differing only in their interfaces and heat sinking – identification is by numbered suffix.

Six require the on/off pin to be grounded to operate (‘negative remote on/off logic’, in TDK speak), and come in open-frame (11.5mm tall, 25g mass), finned-heatsink (24.9mm, 70g) or baseplate-cooled (12.7mm, 50g) versions, with or without a resistor-adjustable current limit.

The seventh has ‘positive’ remote on/off logic and only comes in the open-frame version without adjustable current limit.

“The 20A i7A models can be used to derive additional high-power outputs at higher efficiency than isolated DC-DC converters,” according to the company. “These compact products are suited for use in mobile robotics, drones, medical, industrial, test, measurement, communications, computing and portable equipment.”

Safety certification is to IEC/UL/CSA/EN 62368-1 standards, and they are CE and UKCA marked for the Low Voltage and RoHS Directives.

Find the i7A data sheet here, and catalogue page contains part number and other useful information.