i7A Non-Isolated DC/DC Converters

TDK-Lambda's 400 W to 750 W rated i7A non-isolated DC/DC converters are capable of operating from an input voltage of 9 V up to 60 V. These step-down converters deliver an adjustable output voltage of 0.8 V to 8 V at 60 A, 3.3 V to 18 V at 45 A, or 3.3 V to 24 V at 33 A. The series is designed to be used in a wide range of applications, such as medical, communications, industrial, test, measurement, and battery-powered equipment, including AGVs and drones.

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 with a single-output 12 V, 24 V, 36 V, or 48 V AC/DC power supply to generate additional regulated outputs, with or without battery backup.

Operating efficiencies up to 98.5% minimize power losses and allow operation in harsh ambient temperatures of -40°C to +125°C, even under low airflow conditions. With low output ripple and excellent dynamic response, the i7A's design reduces the required external components, saving cost and board space.

The converters measure 34 mm x 36.8 mm and follow the industry standard 1/16th brick pinout. Three mechanical configurations are available: a low 11.5 mm 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 undervoltage, overcurrent with adjustment option, and thermal protection.

All models are certified to IEC/UL/CSA/EN 62368-1 and carry the CE and UKCA mark for the low-voltage and RoHS directives. Evaluation boards are also available.