Compact automotive-grade common mode choke coils meet ADAS
To suppress wideband common mode noise in modern automotive designs, Murata has introduced the DLW32PH122XK2 wire wound chip common mode choke coil. The 1210 size (3.2 x 2.5mm) component is AEC-Q200-qualified and targets suppressing noise. It is of particular value when addressing the power supply line noise issues now occurring as advanced driver assistance system (ADAS) hardware connects with wide frequency band sensors and imaging equipment (such as radar, lidar for example), explained Murata. The common mode choke coil can also be used to suppress noise in industrial and consumer devices.
The DLW32PH122XK2 draws on Murata’s proprietary winding technology. At 100MHz, this component exhibits 1200 Ohm (typical) impedance levels, and it maintains 900 Ohm (typical) even when 1.0GHz frequencies are applied. According to Murata, any competing chokes operating over such an extensive range of frequencies would be substantially bigger, making them impractical in space-constrained environments.
Murata’s DLW32PH122XK2 is 60V DC rated and supports currents up to 1.2A at 105 degrees C. It is the world’s first 1210 inch size high frequency, high current common mode choke coil for power supply lines to handle such currents and simultaneously have effective impedances at GHz frequencies. A low DC resistance, of 0.05 Ohm (typical), mitigates power losses and curbs unwanted heat generation.
Murata manufactures electronic components, modules, and devices. Its complete range includes ceramic capacitors, resistors/thermistors, inductors/chokes, timing devices, buzzers, sensors and EMI suppression filters. In addition to being a ceramic capacitor manufacturer, it also produces Bluetooth and Wi-Fi modules, board-mount DC/DC converters and is a key manufacturer of standard and custom AC/DC power supplies.
Established in 1944, Murata is headquartered in Japan and has European offices in Finland, France, Germany, Hungary, Italy, the Netherlands, Spain, Switzerland and the UK.
