DC-DC converter range targets automotive

November 13, 2020 //By Christoph Hammerschmidt
DC-DC converters offer low current consumption
The BD9P series of primary DC-DC converters from Rohm is optimised for automotive applications such as ADAS sensors, cameras and radars, infotainment and instrument clusters.

Rohm has launched an automotive DC-DC converter family with fast transient responses and high conversion efficiencies for a low current consumption.

The BD9P DC-DC converter series uses a proprietary Nano Pulse Control power supply technology that enables 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.

The BD9P delivers stable operation during supply voltage fluctuations and reduces output voltage overshoot to less than 10 percent 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 DC-DC converter series is approximately 85 percent at low loads, and up to 92 percent at full load. An optimised quiescent current consumption ensures the lowest possible discharge of the battery in stand-by or power-off mode.

The family comes 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 converter series enables users to configure automotive power supply circuits more quickly and efficiently.


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