Pulse xenon lamp driving system based on dsPIC30F

This paper designs a drive system that meets the three stages of priming, pre-ignition and high-voltage discharge when the pulsed xenon lamp is in operation. The pulsed xenon lamp driving system uses Microchip dsPIC30F as the main control chip. The chip is a high-performance 16-bit digital signal controller that combines microcontroller and DSP technology. It combines the control functions of a microcontroller (MCU) with the advantages of integrating multiple peripherals, as well as the digital signal processor (DSP). Computational power and data processing throughput [2]. In addition, it also shows strong performance in exception handling, software development environment, etc. [3]. Due to the abundant internal resources of the dsPIC30F chip, the pulsed xenon lamp driving system developed based on the dsPIC30F platform requires few peripherals, and the system's anti-interference and reliability can meet the requirements of pulsed xenon lamp operation in various environments, and the system can be improved. Flexibility, reduced development time and reduced development costs.

Drive system hardware design

The drive system can provide sufficient input voltage (about 5kV) to generate glow discharge when the pulsed xenon lamp is illuminated, and can provide stable pre-combustion current (about 100mA) and high-voltage discharge voltage (1~) during pre-ignition and high-voltage discharge. 3kV). The system drives four sets of parallel pulsed xenon lamps, with dsPIC30F4011 chip as the core. The hardware structure diagram is shown in Figure 1. It is mainly composed of dsPIC30F control circuit, high voltage charge and discharge circuit, pre-combustion circuit, high voltage start-up circuit, panel output display and computer. Communication interface.

Figure 1 Hardware structure diagram of pulse xenon lamp drive system

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