Load detection circuit with high precision and power supply management chip

A power management chip, load detection technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of increasing PCB board area, cost and resource burden, and the use effect is not necessarily better, to achieve circuit structure. Simple design, saving resources, and improving the effect of PCB board area

Active Publication Date: 2017-10-17
深圳市英特源电子有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

In the actual detection process, the general load detection is carried out externally. In this case, it is necessary to increa

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  • Load detection circuit with high precision and power supply management chip
  • Load detection circuit with high precision and power supply management chip
  • Load detection circuit with high precision and power supply management chip

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] see Figure 1 to Figure 3 A high-precision load detection circuit of the present invention includes an error amplifier arranged inside a power management chip and an ADC processing chip for jointly detecting external load changes with the error amplifier; the output terminal of the error amplifier is connected to the ADC processing chip and the ADC processing chip processes the output value of the error amplifier, and directly outputs the load change status of the corresponding power management chip; the other input terminal of the ADC processing chip inputs the corresponding input voltage a...

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Abstract

The invention provides a load detection circuit with high precision and a power supply management chip. The load detection circuit with high precision comprises an error amplifier arranged in the power supply management chip and an ADC processing chip for detecting external load change status with the error amplifier, wherein an output end of the error amplifier is connected with one input end of the ADC processing chip; an output value of the error amplifier is processed by the ADC processing chip and a load change conditions of the corresponding power supply management chip can be directly output; a product value between an absolute value between input voltage and output voltage of a power supply system and a relative coefficient is inputted to the other input end of the ADC processing chip; and the ADC processing chip is connected with an output end of the power supply system. The circuit structure is simple, and a traditional load detection way of requiring a PCB panel is improved, so resource is saved and high detection precision is provided.

Description

[technical field] [0001] The invention relates to the technical field of load detection circuits, in particular to a high-precision load detection circuit and a power management chip with high detection accuracy, good sensitivity and low manufacturing cost. [Background technique] [0002] In recent years, with the continuous improvement of people's living standards, many different types of charging equipment have appeared one after another. However, in many applications, especially mobile phone charging equipment, it is necessary to detect not only whether there is a load, but also the size of the load. In the actual detection process, the general load detection is carried out externally. In this case, it is necessary to increase the area of ​​the PCB board, which brings a double burden of cost and resources, and the use effect is not necessarily better. [0003] In view of the above problems, how to make the actual product do not need to add additional pins and external cir...

Claims

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Application Information

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IPC IPC(8): G05F1/565
CPCG05F1/565
Inventor 王莉
Owner 深圳市英特源电子有限公司
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