Acoustic noise reduction in power supply inductors

摘要

Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.

主权项

1. A power supply, comprising:
an adaptor that receives an alternating-current (AC) input signal and outputs a direct-current (DC) output signal, wherein the adaptor electrically converts the AC input signal to the DC output signal; a charger coupled to the output of the adaptor, wherein the charger electrically converts the DC output signal to a lower-voltage DC signal and outputs the lower-voltage DC signal; wherein the charger includes an inductor in a J-lead package, wherein a set of wires forming a set of J-leads are coupled from the inductor coil enclosed in the J-lead package to the outside of the J-lead package through corresponding apertures in a casing; wherein each wire is bonded to a set of walls of the corresponding aperture using a bonding agent.