At AIMS Power, we offer a broad selection of step-down converters. DC-to-DC step-down converters give you a way to provide the proper voltage for devices and appliances of different voltages. The more specific work of the inverting circuit is as follows: firstly, the LC oscillation circuit converts DC power into AC power secondly, the coil steps up the irregular alternating current into a square alternating current finally, the square alternating current is rectified to sine wave alternating current.Step-down converters provide an easy and efficient way to convert one direct-current voltage to another DC voltage. In brief, the control circuit of the inverter controls the operation of the whole system, the inverting circuit plays role of converting direct current into alternating current, and the filtering circuit is used to filter out undesired signals. When the load is working, the sampling voltage is reflected to stabilize the voltage output of the inverter. It can ensure the 1600V voltage required to start the lamp and reduce the voltage to 800V after the lamp is started. The input pulse is amplified by push-pull amplifier to drive the MOS transistor to switch on or off, so that the DC voltage charges and discharges the inductor, and the other end of the inductor can obtain AC voltage. Voltage conversion circuit is made of MOS transistor and energy storage inductance. It has the following functions: internal reference voltage, error amplifier, oscillator and PWM, over-voltage protection, under-voltage protection, short circuit protection, output transistor. When ENB is in high level, the backlight lamp of Panel is lighted by output high voltage. In addition, power inverter will also provide different currents to the load, the smaller DIM value, the greater output current from the inverter. Meanwhile, DIM voltage is provided by the main board with a range of 0 to 5V, which feeds back different DIM values to the feedback terminal of the PWM controller. When ENB is zero, the inverter does not work, while when ENB is 3V, the inverter works normally. Among them, VIN is provided by adapter, and ENB voltage is provided by MCU on the main board with a value of 0 or 3V. The input interface includes 3 signals, 12V DC input VIN, working enabling voltage ENB and Panel current control signal DIM. The inverter is made of inverting circuit, logic control circuit and filtering circuit, mainly including input interface, voltage start circuit, MOS switch, PWM controller, DC conversion circuit, feedback circuit, LC oscillation and output circuit, load and so on, as shown in the following figure. Both of converter and inverter use the pulse width modulation (PWM) technology. The converter is to convert the AC power of the mains grid into a stable 12V DC output, while the inverter is to convert the 12V DC voltage of the adapter into high-frequency high-voltage alternating current. The power inverter is a kind of DC to AC transformer, and it is actually a process of voltage inversion compared with the converter. Strong adaptability and stability with load.With hard oxidized surface, it has good friction resistance and can resist extrusion or impact of a certain external force. With the aluminum shell, the inverter has good heat dissipation. The inverter has multiple protection functions, such as short circuit, overload, over-voltage, under-voltage, over-temperature and reverse connection.
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