ABB 3BHE024855R0101 UFC921A101 Interface board

ABB 3BHE024855R0101 UFC921A101 Interface board

UFC921A101 3BHE024855R0101 inverter is a converter that converts DC power (battery, storage battery) into constant frequency and constant voltage or frequency and voltage regulated AC (generally 220V, 50Hz sine wave). It is composed of inverter bridge, control logic and filter circuit. It is widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVDs, VCDs, computers, televisions, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting, etc. In foreign countries, due to the high popularity of cars, when working or traveling, inverters can be used to connect batteries to drive electrical appliances and various tools to work. The on-board inverter output through the cigarette lighter is 20W, 40W, 80W, 120W to 150W. The higher power inverter power supply should be connected to the battery through the connecting wire. Connect home appliances to
The output end of the power converter can use various electrical appliances in the car. The electric appliances that can be used include: mobile phones, laptops, digital cameras, cameras, lighting lamps, electric shavers, CD players, game consoles, handheld computers, electric tools, car refrigerators and various kinds of travel, camping, medical emergency appliances, etc.

UFC921A101 3BHE024855R0101 inverter is a DC to AC transformer, which is actually a voltage inversion process with the converter. 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; Both parts also use the pulse width modulation (PWM) technology which is widely used. Its core part is a PWM integrated controller. The adapter uses UC3842 and the inverter uses TL5001 chip. The TL5001 has a working voltage range of 3.6~40V, and is internally equipped with an error amplifier, a regulator, an oscillator, a PWM generator with * zone control, a low-voltage protection circuit and a short-circuit protection circuit. Input interface part: the input part has three signals, 12V DC input VIN, working enable voltage ENB and panel current control signal DIM. The VIN is provided by the adapter, and the ENB voltage is provided by the MCU on the main board. Its value is 0 or 3V. When ENB=0, the inverter does not work, while when ENB=3V, the inverter is in normal working state; The DIM voltage is provided by the main board, and its variation range is 0~5V
Different DIM values are fed back to the feedback end of the PWM controller, and the current provided by the inverter to the load will also be different. The smaller the DIM value, the greater the output current of the inverter.
UFC921A101 3BHE024855R0101 voltage start circuit: ENB is high level, and outputs high voltage to light the backlight lamp tube of Pane |.
PWM controller: It has the following functions: internal reference voltage, error amplifier, oscillator and PWM, overvoltage protection, undervoltage protection, short circuit protection, output transistor.
UFC921A101 3BHE024855R0101 DC conversion: A voltage conversion circuit is composed of MOS switch tube and energy storage inductor. The input pulse is amplified by a push-pull amplifier to drive MOS tube to switch, so that the DC voltage can charge and discharge the inductor, so that the other end of the inductor can get AC voltage.
LC oscillation and output circuit: ensure the 1600V voltage required for lamp start, and reduce the voltage to 800V after lamp start.
Output voltage feedback: When the load is working, feedback the sampling voltage to stabilize the voltage output of the I inverter.

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