Quarter-brick DC-DC converters rated up to 300W

TDK-Lambdavisit website


TDK-Lambda is extending its range of high-power quarter-brick modules with the introduction of the iQL series. Covering the output voltage range from 1.2-28V and with a power rating up to 300W, this new family of wide input voltage range, fully regulated output DC-DC converters delivers exceptional performance in the industry standard DOSA quarter brick footprint.

The iQL series has been designed with confined space and demanding thermal environments in mind, as used in telecom, datacom, access, wireless and many other applications including test and measurement, broadcast and industrial. The single-board, open-frame, quarter-brick converter offers up to 95 per cent power conversion efficiency, 181W/in3 power density and 70A useable output current. Furthermore, the iQL converter's efficiency curve remains high and flat, staying at more than 92 per cent efficiency over a wide 25 per cent to 100 per cent load.

By integrating TDK's custom ASIC control device, ferrite cores and multi-layer capacitors, engineers at TDK-Lambda have reduced the component count significantly, providing in a single-board device the same levels of power formerly only available on two-board designs. Additionally, the optimised, reduced component count layout and high-power density of the iQL series provide a more reliable and cost-effective product.

Two application areas are catered for with the iQL series of DC-DC power modules. For conventional power rails, the standard output voltages of 1.2, 1.5, 1.8, 2.5, 3.3, 5, 24 or 28V are equipped with both remote sense and trim suitable for powering a wide array of devices. The 8.3, 9.6 and 12V output products, featuring output trim and no remote sense, are suitable for powering intermediate bus architectures. The iQL family also has a wide input range of either 36-75V or 18-36V.

The input is fully isolated from the output and base plate. Standard features include fixed frequency operation, remote on/off, monotonic and pre-bias load startup, auto recovery of input, under-voltage output, over-current and over-temperature protection circuitry, and latching output over-voltage. Latching protection for over-current and over-temperature, positive polarity on/off and no base plate are offered as options.

TDK-Lambda's iQL converters are approved to a wide range of national and international safety standards including UL60950, VDE 0805 and CB scheme (IEC 950), and are RoHS-compliant. In addition, the iQL series carries the CE mark according to the LV Directive and comes with a three-year warranty.

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