DC/DC converters offer low current consumption

November 10, 2020 //By Christoph Hammerschmidt
DC/DC converters offer low current consumption
Optimised for automotive applications such as ADAS sensors, cameras and radars, infotainment and instrument clusters, the BD9P series of primary DC/DC converters from Rohm is the ideal choice for a wide range of applications. The product family comprises twelve versions with output voltages from 0.8V to 8.5V.

To ensure stable operation of switching regulators, conventional converters find it difficult to combine both fast transient responses and high conversion efficiencies. Rohm's new DC/DC converters use proprietary Nano Pulse Control power supply technology. This enables ultra-fast operation at 2.2 MHz that does not interfere with the AM frequency band (max. 1.84 MHz) while achieving a high down-conversion ratio - an optimal and highly efficient technology for automotive applications.

The BD9P series delivers stable operation during supply voltage fluctuations and reduces output voltage overshoot to less than 10% compared to competing products. The innovative circuit technology minimises overshoot and undershoot and reduces the number of output capacitors to a minimum. The application of this control method allows both high efficiency and fast load response. The efficiency of the new DC/DC converters is approximately 85% at low loads, and up to 92% at full load. An optimised quiescent current consumption ensures the lowest possible discharge of the battery in stand-by or power-off mode.

The new components come in the VQFN20FV4040 package with dimensions of 4.0 mm x 4.0 mm x 1.0 mm or the HTSSOP-B20 package with dimensions of 6.5 mm x 6.4 mm x 1.0 mm and offer a switching frequency of 2.2 MHz. Voltages of 3.5 V to 40 V are required for the supply. The maximum output current is 1.0 A or 2.0 A. The BD9P series operates in a temperature range from -40 °C to +125 °C.

The combination of the BD9P products with the BD9S series of secondary DC/DC converters enables users to configure automotive power supply circuits more quickly and efficiently.

More information and reference designs: www.rohm.com

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