Power amplifier circuit with overcurrent protection structure and its load power supply circuit

An overcurrent protection circuit, power amplifier circuit technology, applied in amplifier protection circuit layout, power amplifiers, amplifiers and other directions, can solve the problems of high system overhead, high cost, large number of overcurrent detection modules, etc., to save circuit costs, improve Cost-effective, effect of reducing circuit area

Active Publication Date: 2021-05-18
CRM ICBG (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the overcurrent detection structure of the full bridge circuit in the prior art is that the number of overcurrent detection modules is large, the system overhead is large, and the cost is high

Method used

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  • Power amplifier circuit with overcurrent protection structure and its load power supply circuit
  • Power amplifier circuit with overcurrent protection structure and its load power supply circuit
  • Power amplifier circuit with overcurrent protection structure and its load power supply circuit

Examples

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Embodiment Construction

[0031] In order to illustrate the present invention more clearly, specific examples are given below for further illustration.

[0032] see figure 2 , the power amplifier circuit with an overcurrent protection structure includes a power amplifier circuit module and an overcurrent protection circuit structure, and its main feature is that the overcurrent protection circuit structure has at least one overcurrent detection module, and the overcurrent detection module There are two input terminals, each of the overcurrent detection modules is uniquely corresponding to the two output channel circuit units in the power amplifier circuit module, and the overcurrent detection module is corresponding to the two output channel circuit units homogeneously connected. The output channel circuit unit is composed of an upper tube and a lower tube.

[0033] see image 3 , Figure 4 And the following table, the AB channel and CD channel of the power amplifier circuit with overcurrent prote...

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PUM

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Abstract

The present invention relates to a power amplifier circuit with an overcurrent protection structure, including a power amplifier circuit module and an overcurrent protection circuit structure, characterized in that the overcurrent protection circuit structure has at least one overcurrent detection module, each of the The overcurrent detection modules are uniquely corresponding to the two output channel circuit units in the power amplifier circuit module, and the overcurrent detection modules are connected to the corresponding two output channel circuit units. The invention also relates to a load power supply circuit for realizing overcurrent protection based on the circuit. The power amplifier circuit with over-current protection structure and the load power supply circuit for over-current protection adopt this structure, and two output channels are monitored through one over-current detection module, which saves system overhead and improves the number of over-current detection modules in the prior art. The problem of many chips occupying a large chip area reduces the cost.

Description

technical field [0001] The invention relates to the field of power amplifier circuits, in particular to the field of overcurrent protection of power amplifier circuits, and specifically refers to a power amplifier circuit with an overcurrent protection structure and a load power supply circuit thereof. Background technique [0002] The overcurrent protection structure is a common structure in power circuits, and it is almost indispensable in power amplifier circuits and power management circuits. For power amplifier circuits, the number of overcurrent protection structures and the number of signal channels are generally in one-to-one correspondence. For example, the more commonly used BTL circuit, also known as the bridge push-pull circuit, is a power amplifier between the output stage and the speaker. Using a bridge type power amplifier with higher power utilization than OCL and OTL power amplifiers, under the same operating voltage and the same load conditions, the BTL cir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/52H03F3/21
CPCH03F1/523H03F3/21
Inventor 张殿军吕永康程学农
Owner CRM ICBG (WUXI) CO LTD
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