| Claiming an industry first, TDK has announced a common-mode filter for in-vehicle power line conditioning. Designed to reduce noise in power lines to electronic control units (ECU), the filter is compact and resistant to shock, vibration and extremes of temperature – typical under-bonnet conditions.
The filter is also lead-free, complying with legislation on the use of hazardous substances in automobiles and electronic equipment.
A common requirement of ECUs is reliability under harsh conditions: they must perform under high levels of vibration, humidity, dust, freezing temperatures and desert heat. They must also cope with electrical noise. Power supply from a car battery is not ideal; the output is not constant and is subject to surges.
The ACM90V-701-2PL common-mode filter offers power line noise suppression with reliability and high temperature resistance. The spec allows for an operating range of -40°C to +125°C. As well as temperature peaks, the component resists thermal shocking: it withstands loadings between these limits with 30 minute hold times for 1,000 cycles. It measures 9 x 7 x 4.3mm.
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