Unlocking Potential: Design Strategies for High Voltage, Low Current, and Low Power Power Systems

Design of a high-voltage, low-current, low-power power supply system

In today's science and technology field, the demand for high-voltage, low-current, low-power power supply systems is increasing. Such power supply systems are usually used in precision electronic equipment, such as copying equipment, medical instruments, etc. In order to meet the high requirements of these devices for power supply systems, an innovative high-voltage switching power supply is designed and manufactured. This article will introduce the design principle, circuit design points, performance test results and conclusions of the power supply system in detail.


1. Design principle

The design principle of this high-voltage switching power supply is as follows: First, the power supply system obtains the input signal from the 220V AC mains, and then undergoes rectification and filtering, and then drives the high-frequency transformer together with the output signal of the PWM pulse modulator. Through the work of the high-frequency transformer, the required high-voltage output power is finally obtained. In the system, a feedback loop is also set up to monitor and adjust the output voltage to ensure the stability and reliability of the power supply system.

2. Circuit design points

2.1 PWM control circuit

The power supply system uses a SG3524 model PWM modulator with good performance and stability. In order to prevent the excessive current generated when the power is turned on from impacting the chip, a soft start circuit is designed. A series of optimizations have also been made in the selection and wiring of power tubes to eliminate parasitic oscillations that may be generated by power tubes when working at high frequencies.


2.2 Transformer drive circuit

The drive circuit of the high-voltage transformer adopts a single-ended drive working mode, which is simple and reliable. The signal of the SG3524 chip drives the work of the power tube to achieve the effective operation of the high-frequency transformer. At the same time, the circuit design focuses on impedance matching and the elimination of parasitic oscillations to ensure the stability and reliability of the system.

2.3 Sampling feedback circuit

In the feedback loop, a voltage sampling feedback circuit is used to adjust the output voltage by adjusting the variable resistor. This design makes the high-voltage power supply have good stability and controllability.

3. Performance test

After a series of performance tests, the high-voltage switching power supply showed good performance and stability. It met the design requirements in terms of response speed, stability and controllability. The specific test results will be introduced in detail later.


4. Conclusion

In summary, this high-voltage switching power supply has the advantages of small size, good stability and fast response speed, and is suitable for small power supply systems requiring high voltage and low current. Through continuous optimization and improvement, it is believed that this power supply system will play an important role in the field of precision electronic equipment.