2.5W micromodule converter provides 2.5 kVAC isolation

August 01, 2014 // By Graham Prophet
LTM8046 is a 2.5W output DC/DC µModule (micromodule) converter with 2 kVAC galvanic isolation (production tested to 3 kVDC) in a 9 x 15 x 4.92 mm ball grid array (BGA) package.

A minimum creepage distance of 4.3 mm on the package exterior supports operation at a working voltage up to 400 VRMS in a pollution degree 2 environment.* The isolated transformer, control circuitry, power switches, and a certain amount of input and output capacitance are encased in the BGA package. The UL60950 recognised (file# 464570) LTM8046, combined with three 1206 case size or smaller ceramic capacitors and one 0603 size resistor, comprise a compact solution for isolated applications such as industrial, transportation and instrumentation equipment.

The isolated µModule converter operates from an input voltage of 3.1V to 31V, delivering a regulated output voltage on the secondary side, adjustable from 1.8V to 12V with ±5% accuracy over temperature. Whether the input voltage is above, below or equal to the desired output voltage, the internal flyback architecture enables the LTM8046 to maintain output voltage regulation. Its thermal design allows the LTM8046 to deliver the full 2.5W output power at ambient temperatures up to 100°C with no forced airflow.

The LTM8046 is available in -40°C to +125°C or -55°C to +125°C internal operating temperature grades, pricing starts at $14.47 (1,000).

* Pollution degree is a classification reflecting the amount of dry pollution and condensation present in the environment. Pollution degree 2 refers to an environment where normally only non-conductive pollution or temporary condensation may occur, such as in offices, laboratories and test stations.

Linear Technology; www.linear.com/product/LTM8046