High voltage switching stabilized voltage supply circuit

A high voltage switching stabilized voltage supply circuit is illustrated in the diagram. This is the switching power supply for an 80P type color television. It utilizes auto-excitation and a PWM circuit. The output is isolated from the power system, providing 110V and 18V DC voltage outputs. The power supply includes a power frequency rectification and filtration circuit, along with a starting oscillator.

The high voltage switching stabilized voltage supply circuit is designed to efficiently convert and regulate voltage for electronic devices, particularly for color televisions of the 80P type. At the core of this circuit is a PWM (Pulse Width Modulation) controller that manages the switching of the power transistors. This method allows for precise control over the output voltage and minimizes power loss, enhancing overall efficiency.

The circuit begins with a power frequency rectification and filtration stage, which converts the incoming AC voltage into a smoother DC voltage. This is crucial for ensuring that the subsequent stages of the circuit receive a stable input. The rectification is typically achieved using a bridge rectifier configuration, which consists of four diodes arranged to efficiently convert both halves of the AC waveform into DC.

Following the rectification, the filtration circuit employs capacitors to reduce ripple voltage, ensuring that the output is as stable as possible. This stable DC voltage is then fed into the PWM circuit, which modulates the duty cycle of the switching transistors. The auto-excitation feature allows the circuit to self-regulate, adjusting the PWM signal based on the load conditions, which helps maintain the desired output voltages of 110V and 18V DC.

The isolation of the output from the power system is a critical safety feature. It prevents any direct electrical connection between the high voltage supply and the input power, reducing the risk of electric shock and ensuring compliance with safety standards. This isolation is typically achieved using transformers or opto-isolators, which serve to separate the control and power sections of the circuit.

In summary, this high voltage switching stabilized voltage supply circuit is a sophisticated design that integrates modern switching technology with traditional rectification and filtration methods. It provides reliable and isolated voltage outputs necessary for the operation of color televisions, demonstrating the importance of efficiency and safety in electronic power supply design.High voltage switching stabilized voltage supply circuit is shown in the diagram. It is the switching power supply of 80P type color TV. It adopts auto-excitation, PWM circuit. Its output is isolated with power system. This power supply has 110V and 18V DC voltage output. The power supply consists of power frequency rectification filtration circuit, start os.. 🔗 External reference