3results about How to "Improve EMI performance" patented technology

This invention discloses a resonant circuit, a PCB board, and a controller, including a power inverter unit, an upper bridge arm resonant pre-charge unit, a lower bridge arm resonant pre-charge unit, an upper bridge arm buffer unit, and a lower bridge arm buffer unit. The input terminal of the upper bridge arm resonant pre-charge unit is connected to an external DC input terminal, and the output terminal of the upper bridge arm resonant pre-charge unit is connected to the power inverter unit through the upper bridge arm buffer unit. The input terminal of the lower bridge arm resonant pre-charge unit is connected to a ground terminal, and the output terminal of the lower bridge arm resonant pre-charge unit is connected to the power inverter unit through the lower bridge arm buffer unit. By introducing an active clamping and pre-charge mechanism, the circuit can suppress voltage spikes to a lower level at the moment of turn-off. Compared with traditional passive RCD absorption technology, its voltage clamping value is more stable and less affected by load fluctuations, which reduces the voltage withstand burden of the switching transistor to a certain extent and improves the reliability of the circuit.

The utility model discloses an inductor with a complete plane, which relates to the field of inductance elements, and comprises a first iron core, a second iron core, a third iron core and a fourth iron core, the second iron core is of a rectangular block-shaped structure; the terminal is of a structure shaped like a Chinese character'ji '; the terminal is inserted into the first iron core from the opening position, and the second iron core is inserted into the terminal, so that the first iron core completely covers the terminal and the second iron core, and the outer surface of the inductor forms a complete plane. The first iron core is used as a magnetic protective cover to completely cover the second iron core and the terminals, so that the outer surface of the formed inductor is of a complete plane structure, a split type stacking connection structure in the prior art is replaced, in the SIM technology, direct empty suction can be achieved, use is convenient, gaps do not exist on the outer surface of the inductor structure, and the structure is simple. And the stability of the size space is improved. Under the action of a complete plane and zero clearance, the electromagnetic interference performance is improved, and the stability of saturation current is improved.

The utility model relates to the technical field of car light circuit, specifically disclose a miniaturized integrated car light BUCK circuit, including BUCK IC integrated chip, BUCK IC integrated chip includes VIN pin, EN pin, VOUT pin, FB pin, VCC pin and BST pin, has the first capacitor group and second capacitor group on VIN pin, the first resistance formation POWER IN is connected on EN pin, the voltage -division resistance for voltage division is provided with on FB pin, VOUT pin is connected with third capacitor group, the utility model discloses a purpose at to solve the traditional car light circuit reliability problem through car light BUCK circuit, help system improves stability.