US 2024/0179461 A1Published application

Vehicle-mounted sound system and open-circuit detection method for loudspeaker thereof

AssigneeSuzhou Sonavox Electronics Co., Ltd.

InventorsHongbing DING, Yurong WU

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Abstract

Discloses are a vehicle-mounted sound system, an open-circuit detection circuit and an open-circuit detection method for a loudspeaker thereof. The vehicle-mounted sound system includes an open-circuit detection circuit including a switching circuit, the switching circuit is connected between an output port of a control module of a power amplifier and a first connecting port so as to be controlled by a control signal from an output port to conduct or cut off the output port and the first connecting port. The second connecting port is electrically connected to a node for accessing a voltage together with an input port of the control module. The control module is configured for enabling the open-circuit detection circuit though the output port to determine whether the loudspeaker is in an open-circuit state according to a signal received by the input port.

Claims15

Dependent claims

A vehicle-mounted sound system, comprising:

a power amplifier for driving a vehicle-mounted loudspeaker electrically connected thereto;
a control module for controlling the power amplifier, and having an output port and an input port;
and
an open-circuit detection circuit having a first connecting port and a second connecting port, one of the first connecting port and the second connecting port being electrically connected to a positive lead of the vehicle-mounted loudspeaker and the other one being electrically connected to a negative lead of the vehicle-mounted loudspeaker;
wherein, the open-circuit detection circuit comprises a switching circuit, the switching circuit is connected between the output port of the control module and the first connecting port so as to be controlled by a control signal from the output port to conduct or cut off the output port and the first connecting port;
the input port of the control module and the second connecting port are respectively electrically connected to a node for accessing a voltage;
and
the control module is configured for enabling the open-circuit detection circuit though the output port to determine whether the loudspeaker is in an open-circuit state according to a signal received by the input port.

5 more elements

An open-circuit detection circuit of a vehicle-mounted sound system, comprising a first connecting port and a second connecting port, wherein one of the first connecting port and the second connecting port is electrically connected to a positive lead of a vehicle-mounted loudspeaker and the other one is electrically connected to a negative lead of the vehicle-mounted loudspeaker;

wherein the open-circuit detection circuit comprises a switching circuit, the switching circuit is connected between an output port of a control module of a power amplifier and the first connecting port so as to be controlled by a control signal from the output port to conduct or cut off the output port and the first connecting port;
and
the second connecting port is electrically connected to a node for accessing a voltage together with an input port of the control module.

Dependencies are inferred from the claim text.