i7C Series Buck-Boost Converters

TDK-Lambda i7C series 300 W, 8 A, 12.5 A, and 20 A rated non-isolated DC/DC converters have an input range of either 9 V_DC to 36 V_DC or 9 V_DC to 53 V_DC, with 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 0.25 mA, typical, when the remote on/off is utilized to place the unit in standby mode, extending 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, 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: a low 12.2 mm high open-frame model, a baseplate construction for conduction cooling, or 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.