Abstract: A power source apparatus, according to an aspect of the present disclosure, includes: a circuit on a primary side constituted so that a first voltage with an input voltage stepped down is formed on the primary side of a transformer; and a circuit on a secondary side including first to N sub-circuits (N is a natural number of 2 or more), each sub-circuit operating to generate a power source voltage of a driver configured to drive a power element through a converter operating based on a second voltage formed on the secondary side of the transformer after the first voltage is transformed by the transformer, in which the power source voltage generated by the sub-circuit is determined dependently on an output voltage of the converter.
Type:
Application
Filed:
July 26, 2023
Publication date:
March 21, 2024
Applicant:
IRON DEVICE CORPORATION
Inventors:
Hyun Min Cho, Ki Tae Park, Jin Sung Kim
Abstract: The present invention relates to a speaker driver and an operation method thereof and includes an amp part configured to output a pulse voltage, in which an input signal is amplified on the basis of a supply voltage, to drive a capacitive speaker that generates sound by a driving voltage so that the driving voltage formed by filtering the pulse voltage is applied to the capacitive speaker, and a controller configured to adjust a magnitude of an input audio signal in a high frequency range and transmit the input audio signal to the amp part as the input signal to limit an overcurrent applied to the capacitive speaker by the driving voltage having a high frequency.
Type:
Grant
Filed:
June 15, 2018
Date of Patent:
March 22, 2022
Assignee:
IRON DEVICE CORPORATION
Inventors:
Ki Tae Park, Jin Sung Kim, Kyu Don Choi, Hwang Soo Son
Abstract: The present invention relates to a speaker driver and an operation method thereof and includes an amp part configured to output a pulse voltage, in which an input signal is amplified on the basis of a supply voltage, to drive a capacitive speaker that generates sound by a driving voltage so that the driving voltage formed by filtering the pulse voltage is applied to the capacitive speaker, and a controller configured to adjust a magnitude of an input audio signal in a high frequency range and transmit the input audio signal to the amp part as the input signal to limit an overcurrent applied to the capacitive speaker by the driving voltage having a high frequency.
Type:
Application
Filed:
June 15, 2018
Publication date:
October 28, 2021
Applicant:
IRON DEVICE CORPORATION
Inventors:
Ki Tae Park, Jin Sung Kim, Kyu Don Choi, Hwang Soo Son