Automotive Body control/Central gateway module block diagram

Description
The body control module controls the various electrical components which are responsible for the comfort and convenience functions in the car. In addition to the controlling function for the loads, such as wipers, washers, lights and motors, it monitors the operating status of switches and takes care of the signal transmission.

Despite centralized and decentralized approaches, NXP continues to expand its portfolio for vehicle body electronics with products that offer lower power consumption, reduced power dissipation and a complete range of solutions for all automotive networking standards.

Driving a range of loads
The load current in the body segment goes from several mA for driving LEDs up to more than 20 A for controlling brushed or brushless motors. NXP offers discrete devices such as small-signal MOSFETs or low VCEsat (BISS) transistors for small loads, and Power MOSFET devices in advanced TrenchMOS technology for high current requirements. TrenchPLUS, for example, is a range of standard MOSFETs with added protection features, including current and temperature sensing components, overvoltage clamps and gate protection (ESD) diodes. All of these products have some characteristics in common, with low conduction losses and innovative packages to save board space and provide cost-effective solutions.

The TDA3629 is a light position controller with a monolithic integrated circuit that adapts to the elevation of the light beam in the head light of the car. The PCA96xx products allow up to 16 independent PWM channels for individual brightness control, global dimming and color mixing of LED for any type of status and indicator LED. The PCA851xx series is a family of LCD drivers particularly well suited for driving segmented displays at high optical performance for the center stack module. The family comprises of a large selection of cased products for Chip-On-Board application which can drive up to 480 segments as well as a large selection of uncased products for direct Chip-On-Glass application which can drive up to 640 segments.

In-vehicle communication
Besides offering all the major networking protocols including CAN, LIN, and FlexRay, NXP offers highly integrated in-vehicle-networking products such as our system basis chip (SBC) families, combining one or several bus transceivers, voltage regulators, I/O pins and the option of a watchdog in a single IC. The combination of these integrated functions offers advanced low-power mode control and smart fail-safe behavior. Pin compatible family devices with different transceiver options support scalable platforms by simply changing the population of the printed circuit board.

Magnetoresistive and temperature sensors
NXP’s magneto-resistive (MR) angular sensor systems of the KMA family are ideal for a variety of body applications. These devices provide an output signal virtually independent of magnet tolerances, magnet temperature coefficients, magnet-sensor distance and positioning tolerances, guaranteeing reliability and simplifying your manufacturing process.

Our silicon-based temperature sensors, which offer a virtually linear characteristic over their entire operating range, ensure highly accurate measurement with a long operating life. The KTY series can be used in systems for protection against overheating and heating control. Used throughout the car, they contribute considerably to a more efficient, safe, and more comfortable ride.

I/O protection
NXP offers a series of ESD protection devices out of the PESD family, specifically designed to protect automotive networks. The MMBZ series offers single line bidirectional or dual-line unidirectional transient overvoltage protection in a small SOT23 package. Surge protection up to 600W is assured by the Transient Voltage Suppressor (TVS) product family.

Low ohmic Power MOSFET devices in advanced TrenchMOS technology allow robust reverse polarity protection.

Glue logic
Beside standard logic functionality with different supply voltage range and speed in innovative packages, NXP offers dedicated devices as low Ohmic analog switches (NX3L series), analog and digital multiplexers and I/O expansion devices to strive for cost optimized body solutions.

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