Miniature common mode filters meet automotive high temperatures
Operating at up to 125 degrees C, the KCZ1210AH miniature, common mode filters by TDK can be used in automotive applications. The filters have dimensions of just 1.25 x 1.0 x 0.5mm and provide a noise control function for different transmission signal lines for automotive design.
Common mode filters are used in automotive accessories but are not suitable for the forward sensing cameras or 360 degree view cameras in advanced driver assistance systems (ADAS) where they can be used as anti-noise devices. Conventional multi-layer common mode filters operate within a temperature range of -40 and +105 degrees, excluding them from use in ADAS cameras.
TDK use of proprietary materials technology and structural design allows the KCZ1210AH filters to operate at -55 to +125 degrees C. They also have a rated current of 100A (max) and a rated voltage of 5.0V (max). The use of a conductive resin-based electrode controls cracks forming due to thermal shock and increases durability against mechanical stresses, such as substrate strains, explained TDK.
The company is working to enhance its inductive devices for ADAS and will expand its line of miniaturised common mode filters supporting higher speed differential signals.
The KCZ1210AH common mode filters are in mass production now.
TDK was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. The company’s portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency and piezo and protection devices. The portfolio also includes sensors and sensor systems such as temperature and pressure, magnetic and MEMS sensors. Other product lines are power supplies and energy devices and magnetic heads. Products are marketed under the brands TDK, Epcos, InvenSense, Micronas, Tronics and TDK-Lambda.
TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.