What is the function of accessory in a car?
1 Answers
Car accessory is an auxiliary mode of a car. Accessory is the ACC power supply, which is a type of power supply used in cars, controlled by the car key, to provide power to certain components of the car's entertainment devices such as the audio system for use. For example, the radio and cigarette lighter remain powered. When the vehicle is being started, a strong current is required, at which point the accessory (ACC) automatically stops supplying power. Once the car ignition is completed, it automatically resumes power supply. Car ignition switches generally have four positions: START, ON, ACC, and LOCK. Usually, when the car is parked and turned off, the key is in the LOCK position. In this position, the vehicle's circuit is disconnected, and the entire car is powered off. Additionally, the steering wheel lock is engaged. When the key is in the ACC position, some of the car's electrical devices are powered, such as the radio and audio system, but other components of the car are not yet powered. This is the main difference between ACC and ON. When the key is in the ON position, all components of the car are powered, including the engine system. START is the ignition position. That is, once the key is turned to the START position, the starter is powered and begins to work. Design principles of accessory power supply: Input voltage VIN range: The VIN range of the battery voltage directly determines the input voltage range of the power conversion to the IC; Heat dissipation considerations: Heat dissipation needs to be designed based on the converter's minimum efficiency; Static operating current and shutdown current; Cost control: The manufacturer's attitude towards cost and specifications is a significant factor affecting the power supply's bill of materials; Position and layout: In power supply design, component layout directly affects the overall performance of the power supply.
