High-frequency inverter electrical appliances are a kind of switching equipment used in the industrial field. What is the working principle of high-frequency inverters? This equipment is controlled by program logic. High frequency inverter can be used in the telecommunications industry and is a switching device in computer rooms. This kind of power supply can be used in the solar energy industry and power generation industry. It is a switching power supply device that uses data line output and is very safe. This article mainly introduces the working principle of high-frequency inverter and the difference between high-frequency inverter and low-frequency inverter. Follow the editor to learn more.

A high-frequency inverter is a DC to AC transformer. It is actually a voltage inversion process with a converter. The working principle of the high-frequency inverter is that the converter converts the AC voltage of the power grid into a stable 12V DC output, while the inverter converts the 12V DC voltage output by the Adapter into high-frequency, high-voltage AC power; both parts are equally The widely used pulse width modulation (PWM) technology is adopted. Its core part is a PWM integrated controller, the Adapter uses UC3842, and the inverter uses TL5001 chip. The operating voltage range of TL5001 is 3.6~40V. It is equipped with an error amplifier, a regulator, an oscillator, a PWM generator with dead zone control, a low-voltage protection circuit and a short-circuit protection circuit.

1. Input connection part: La parte de entrada tiene 3 señales, 12Entrada V CC VIN, voltaje de habilitación de trabajo ENB y señal de control de corriente del panel DIM. VIN es proporcionado por el adaptador, y el voltaje ENB lo proporciona la MCU en la placa base. Its value is 0 o 3V. Cuando ENB=0, el inversor no funciona, y cuando ENB=3V, the inverter is in normal working condition and the DIM voltage is Provided by the mainboard, its variation range is between 0~5V. Different DIM values are fed back to the feedback terminal of the PWM controller. La corriente proporcionada por el inversor a la carga también será diferente. Cuanto menor sea el valor DIM, the smaller the current output by the inverter. cuanto mas grande.

2. Voltage starting circuit: When ENB is at a high level, it outputs high voltage to light up the Panel's backlight tube.
3. controlador pwm: Tiene las siguientes funciones: tensión de referencia interna, amplificador de error, oscilador y PWM, overvoltage protection, undervoltage protection, protección contra cortocircuitos, and output transistor.

4. Conversión CC: A voltage conversion circuit is composed of a MOS switching tube and an energy storage inductor. The input pulse is amplified by a push-pull amplifier and drives the MOS tube to perform switching actions, so that the DC voltage charges and discharges the inductor, so that the other end of the inductor can Get AC voltage.

5. Circuito de oscilación y salida LC.: ensure the 1600V voltage required to start the lamp, and reduce the voltage to 800V after the lamp is started.

6. Retroalimentación de voltaje de salida: Cuando la carga está funcionando., the sampling voltage is fed back to stabilize the inverter voltage output.