Improving Efficiency with Wide-Input Buck-Boost DC/DC Converters

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TDK-Lambda's 300 W, 8, 12.5 and 20 A rated i7C non-isolated DC/DC converters have an input range of either 9 VDC to 36 VDC or 9 VDC to 53 VDC, with an outputs that can be adjusted from 5 V to 28 V, 8 V to 24 V or 9.6 V to 48 V. The product's topology enables a seamless transition from buck (voltage reduction) to boost (voltage increase) operation. The i7C is ideal for generating additional high-power outputs, from existing 12 V, 24 V, 36 V, or 48 V system voltages, in medical, communications, industrial, test and measurement, and battery-powered equipment.

With efficiencies of up to 97%, power losses are minimized allowing the product to operate and deliver high useable power in demanding thermal environments. Under light load conditions, the i7C's control techniques significantly reduce power dissipation. A 5 mA input current draw is typical under zero load conditions. This can be reduced to typically 0.25 mA when the remote on/off is utilized to place the unit in standby mode. This extends the amount of time battery-powered equipment can remain functional during periods of non-peak operation.

The basic feature models include an output voltage adjustment pin, positive or negative logic remote on/off, positive remote sense, plus input undervoltage, overcurrent, and thermal protection. The full-featured models are equipped with a power good signal, output current monitoring, and the ability to synchronize the operating frequency to minimize system noise.

The i7C converters measure 34 mm x 36.8 mm and follow the industry standard 1/16th brick pin-out. The 8 A and 12.5 A modules come in three mechanical configurations which includes a low 12.2 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 20 A module is available in a 14.7 mm high open frame model. The i7C's design reduces the number of external components, saving both cost and board space. All models are certified IEC/UL/EN 62368-1 and 60950-1 and carry the CE mark for the low-voltage and RoHS directives.

Features

• Up to 300 W in a 1/16th brick pin-out
• Up to 97% efficient
• Low off-load power consumption
• Wide 5 V to 28 V, 8 V to 24 V or 9.6 V to 48 V Output Adjustment
• Wide 9 VDC to 36 V or 9 V DC to 53V DC input range,
• Low component count with minimal external components,
• Low airflow with minimal derating requirements

Power management plays a major role in virtually every piece of electronic equipment. If you'd like to know more about how to approach power management in your designs or products, click here for more information.