Instant power-off automatic compensation control circuit for digital power amplifier sound box with Mute or Standby function
A technology of digital power amplifier and instantaneous power failure, which is applied in the direction of transducer circuit, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of low product satisfaction and poor customer experience, and achieve the goal of improving experience Effect
Pending Publication Date: 2021-11-12
SHENZHEN FENDA TECH CO LTD
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Problems solved by technology
[0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide an automatic compensation control circuit for digital power amplifier speakers with Mute or Standby functions when the power is cut off automatically, which solves the problem that the loudspeaker will send out POPO impacts when the power supply of the power amplifier is disconnected. Abnormal noise such as noise, poor customer experience, and low satisfaction with the product
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[0024] Next, the present invention is further described in conjunction with the accompanying drawings and the specific embodiments, and it is to be explained that new embodiments may be formed in any combination of the various embodiments, or each of the technical features, or each of the technical features. .
[0025] Standby Mute function for a belt or a digital amp instantaneous power automatic compensation control circuit, such as image 3 , The voltage clamping circuit comprises a half-wave rectified current, and power down control circuit tank circuit, the amplifier circuit and the power supply input voltage clamping circuit, power down control circuit, a voltage clamping circuit connected to a half-wave rectified current , half-wave rectified current and power down control circuit, a control circuit and power down the digital band amplifier circuit or Standby Mute function is connected, the tank circuit is connected between the power half-wave rectified current and power dow...
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The invention provides an instant power-off automatic compensation control circuit for a digital power amplifier sound box with a Mute or Standby function, the instant power-off automatic compensation control circuit comprises a voltage clamping circuit, a half-wave rectification current, a power-down control circuit and an electric quantity energy storage circuit, a power amplifier power supply input circuit is connected with the voltage clamping circuit and the power-down control circuit, the voltage clamping circuit is connected with the half-wave rectification current, the half-wave rectification current is connected with the power-down control circuit, the power-down control circuit is connected with the digital power amplifier circuit with the Mute or Standby function, and the electric quantity energy storage circuit is connected between the half-wave rectification current and the power-down control circuit. According to the invention, the power amplifier can be quickly turned off in the instant power-off and power-down process of the power supply, the power amplifier stops working in advance when the power supply does not completely fall to 0V, and the power amplifier does not work when the current sound generated by a preceding-stage signal due to the instant interruption of the power-off signal is sent to the power amplifier, so that the loudspeaker does not generate abnormal noise such as POPO impact sound and the like; and the experience feeling of customers and the satisfaction degree of products are improved.
Description
Technical field [0001] The present invention relates to the field of electronic circuit design technology with horn products, particularly to a belt or Standby Mute enabled digital amp instantaneous power automatic compensation control circuit. Background technique [0002] like figure 1 , The digital amplifier 2 feet Mute function with automatic compensation without increasing the power down control circuit but directly controlled by the AMP_3V3. The disadvantage of this technical solution is: When you disconnect power amplifier, speakers will emit a puff (POPO) impact sound, which are not normal noise, poor sense of customer experience, low satisfaction with the product. like figure 2 Shown, prior art automatic power-down without compensation circuit and a signal flow scheme of FIG frame control, when the power supply is disconnected DC OUT of the digital amplifier, the speaker generates technical disadvantages transient puff (POPO) of such abnormal noise. Thus, the need for a ...
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IPC IPC(8): H04R3/00H02M1/32
CPCH04R3/00H02M1/32Y02B70/10
Inventor 韦明桥王玉华梁永治
Owner SHENZHEN FENDA TECH CO LTD