Addressing the need to protect electronic components operating in harsh automotive environments, Freescale Semiconductor has introduced three advanced system basis chips designed to deliver robust EMC (electromagnetic compatibility) and ESD (electrostatic discharge) performance for in-vehicle LINs. The integrated, pin-compatible devices are for use in space-constrained, electromagnetically sensitive LIN slave applications, including designs that require motor control and current monitoring. The MC33910G5 combines power-management capabilities that contribute to low battery discharge during low-power modes, a robust LIN physical layer and a high-side driver. The MC33911G5 features a DC-motor pre-driver, and the MC33912G5 offers a DC-motor pre-driver with current sensing. When combined with a Freescale 8bit S08 microcontroller or an entry-level 16bit S12 microcontroller, the devices can be applied to a range of automotive comfort and body applications, such as door systems, power mirrors, window lifts, sunroofs, multi-function steering wheels, HVAC and fan controls, lighting controls and LIN-controlled wipers. The devices have been certified by conformance-test labs, such as the C&S Group, and by EMC labs, such as IBEE-Zwickau, for general use in LIN/J2602 networks by leading automakers. According to IEC61000-4-2, the devices are designed to sustain harsh energetic ESD pulses up to ±11kV without the need for external protection components. The wave-shaping technology also helps to enable ultra-low electronic emissions. EMC and ESD are a serious concern in harsh automotive environments due to the close proximity of a wide range of networked electronic systems and devices.
