With the improvement of people's requirements for automobile comfort and other aspects, the importance of body electronic control and power is becoming increasingly prominent, and more and more cars are equipped with high-performance body control systems and advanced management systems. The increase and upgrade of such systems have opened up huge space for the application of semiconductor devices.
However, in the face of demands for environmental protection and rich consumer experience, as well as the most stringent specifications for automotive devices, manufacturers must pay more attention to the certification of reliability indicators in product design and manufacturing, on the other hand, they must also ensure that products are While providing higher performance, it meets the requirements of environmental protection and energy saving. This article will combine ON Semiconductor's automotive technology expertise to talk about various devices used in automotive body and power system solutions.
Advanced automotive technology
The increase in automotive electronics has made it impossible for various parts of the car to avoid parasitic signals, and even peak values ​​of 80 VV may occur. The automotive design team must take this into account. Modules and components used in automobiles need to be able to withstand such peaks and ensure proper function. ON Semiconductor utilizes mature automotive technology capabilities to develop a set of specialized high-voltage automotive power supply technologies to implement complex high-voltage system-on-chip (SoC) solutions that meet the requirements of maximum voltage and digital gate integration.
At the same time, more and more electronic content in automobiles has higher and higher requirements for electromagnetic compatibility, and automobile manufacturers have also formulated corresponding performance standards, which are designed to make vehicle network (IVN) applications have higher resistance to ESD pulses and EMI capability. ON Semiconductor uses the innovative I3T50 / I3T80 technology to provide the best-in-class devices. It achieves advanced functions through deep trench isolation and other processes, while ensuring reliable design and reducing interference between different cell structures on the chip. .
A series of ON Semiconductor technologies allow the use of power supplies up to 100V, which is conducive to the integration of components-including embedded microprocessor cores. ON Semiconductor's automotive ASIC and application specific standard product (ASSP) solutions are widely used in powertrain (including high temperature applications with an ambient temperature ≥150 ° C), safety, body, instrument panel, IVN, sensor and driver applications.
ON Semiconductor is a major supplier in the automotive MOSFET market. In addition to the planar MOSFET product line, the company also offers 40 V and 60 V trench MOSFETs. Trench technology is optimized for low Rds ((on)) switching applications and is more suitable for linear operating modes than planar technology.
ON Semiconductor body and convenient application solutions
Body electronics and convenience applications include climate control, smart junction boxes, headlamp adjustment and power control, wipers and light sensing, rearview mirror control, seat position / heating / cooling, door modules, steering wheel sensors, etc.
Here, the body heating, ventilation and air conditioning (HVAC) control, communication and power supply, and DC motor driver are introduced as examples.
1. Control, communication and power supply of body HVAC
HVAC includes multiple subsystems: One is the car heating and ventilation system. Fresh air is drawn into the cabin from the external duct; the incoming air can be heated by a small heating core connected to the engine cooling system. Its purpose is to improve passenger comfort and safety. The second is the air conditioning and refrigeration system, which transfers the heat in the car to the continuously evaporating and condensing outside air to reduce the temperature and humidity of the air. The third is the control head, which is the ECU (Electronic Control Unit) with a user interface.
Figure 1: HVAC block diagram
Figure 1 is a block diagram of HVAC, the green part of the figure will use a variety of ON Semiconductor devices. These devices include diodes and rectifiers for I / O protection; interfaces for transceivers or SBCs; IGBT / FETs and MOSFETs for motor pre-drivers (BLDC, BDC); loads / relays for stepper motor drives Drivers and interfaces; bipolar transistors / digital transistors (BRT) for control panels, interfaces, analog switches, standard logic, multiplexers; amplifiers and comparators for signal conditioning, operational amplifiers; for high-end drivers Drivers, load / relay drivers, IGBT / FETs and MOSFETs; diodes and rectifiers for power protection, small signal switching diodes, zener diodes, Schottky diodes; interfaces for voltage regulation (linear, switching), DC- Direct current (DC-DC) controllers, converters and regulators, controllers, linear regulators; DC-DC controllers, converters and regulators for monitoring; and loads for low-end drivers / Relay driver, IGBT / FET and MOSFET.
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