December 15, 2020
TDK recently annoucned the 500W rated i7A non-isolated DC-DC converters. Capable of operating from an input voltage of 18V to 60V, the step-down converters deliver an output voltage that can be adjusted from 3.3 to 24V with an output current of up to 33A. The series is designed to be used in a wide range of applications including medical, communications, industrial, test, measurement and battery powered equipment.
The i7A series utilizes the industry standard 1/16th “brick” pinout, potentially offering cost reduction and efficiency improvements over isolated converters. They can be used in conjunction with a single output 24V, 36V or 48V AC-DC power supply to generate multiple additional regulated outputs, with or without battery back-up.
Operating efficiencies are up to 98%, minimizing power losses and allowing operation in harsh ambient temperatures of -40°C to +125°C even under low airflow conditions. With low output ripple and an excellent dynamic response, the i7A’s design reduces the number of required external components, saving both cost and board space.
The converters measure 34mm x 36.8mm and follow the industry standard 1/16th brick pin-out. Three mechanical configurations are available – a low 11.5mm high open frame model, a baseplate construction for conduction cooling or with an integral heat sink for convection or forced air cooled environments. The i7A has an output voltage adjustment pin, positive or negative logic remote on-off, positive remote sense, plus input under-voltage, over-current and thermal protection.
All models are certified to IEC/UL/CSA/EN 62368-1 and carry the CE mark for the Low Voltage and RoHS Directives.
• Measurement and battery powered equipment
Main Features and Benefits
• Up to 500W in a 1/16th brick pin-out
• Wide 3.3 to 24V output adjustment
• Wide 18 to 60Vdc input range
• Low component count with minimal external components
• Low airflow with minimal derating requirements
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