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Method for quickly measuring circuit power consumption

A technology for measuring circuit and power consumption, applied in the direction of electric power measurement through current/voltage, etc., can solve problems such as many 0 ohm resistances, it is difficult to achieve non-destructive measurement of mobile phone PCBs, and it is difficult to test the supply current of multiple power supplies at the same time. , to achieve the effect of rapid positioning and confirmation, speeding up R&D and maintenance

Inactive Publication Date: 2010-03-17
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) In the case of more power supply circuits, there are more 0-ohm resistors connected in series, thus occupying more PCB area;
[0009] (2) Due to the small area of ​​the mobile phone PCB, 0 ohm resistors are often packaged in 0402 or 0201, which makes it difficult to connect the ammeter in series;
[0010] (3) Due to the need to remove the 0-ohm resistor and connect the ammeter in series, it is difficult to achieve "non-destructive measurement" of the mobile phone PCB;
[0011] (4) Due to the difficulty of flying leads, it is difficult to test the supply current of multiple power supplies at the same time, so it is impossible to measure the output current of each power supply circuit in the system in real time

Method used

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  • Method for quickly measuring circuit power consumption
  • Method for quickly measuring circuit power consumption
  • Method for quickly measuring circuit power consumption

Examples

Experimental program
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Embodiment 1

[0038] Embodiment one, see image 3 As shown, in this embodiment, the 5-megapixel camera circuit inside the mobile phone is used as a load to measure its power consumption in each power supply domain.

[0039] Such as image 3 As shown, the power supply circuit of the 5-megapixel camera circuit includes three voltage regulators, and the required supply voltages (namely the nominal output voltage) are 2.8V, 1.8V and 1.2V respectively. In order to improve the conversion efficiency, the 1.2V voltage is provided by the conversion output of the Buck type DC-DC voltage regulator, and the other two voltages are provided by the conversion output of the 2-way LDO voltage regulator. The input voltages of the three voltage regulators all adopt the Vin voltage, and the actual output voltages are recorded as Vout1, Vout2, and Vout3 respectively.

[0040] During the debugging process of the camera circuit, if you need to know the working current of the current three voltage domains, first...

Embodiment 2

[0047] Embodiment 2, still taking the 5-megapixel camera circuit inside the mobile phone as an example for illustration, see Figure 4 shown.

[0048] The 2.8V, 1.8V, and 1.2V power supplies required by the 5-megapixel camera circuit are respectively drawn from the printed circuit board (PCB) where they are located through test points. The test points are preset pads on the PCB, and each pad is connected to the voltage output terminals of each voltage regulator in one-to-one correspondence when the PCB is printed, that is, the voltage value of each pad is the three-way stabilizer. The actual output voltage value of the transformer. The triple regulator can be used as image 3 The design and implementation of the three-way voltage regulator shown in the present embodiment will not be repeated here.

[0049] The PCB board is fixed by a tool, and a plurality of probes are installed on the tool, and are respectively connected to each test point one by one through the plurality ...

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Abstract

The invention discloses a method for quickly measuring circuit power consumption, wherein a power supply circuit in a circuit to be measured is designed by adopting a voltage stabilizer and the insideof the voltage stabilizer realizes voltage-stabilizing output by a negative feedback principle; and a path of voltage-stabilizing source is added at a voltage output end of the voltage stabilizer, the output voltage Vext of the voltage-stabilizing source is higher than the practical output voltage Vout of the voltage stabilizer, the output current Iext of the voltage-stabilizing source is read and the circuit power consumption is calculated by substituting the Vext and the Iext in a formula P=Vext*Iext. Under the conditions that wire jumping phenomenon does not occur and any devices on a circuit board are not taken off, the method for measuring circuit power consumption can quickly, accurately and non-destructively measure the current consumption conditions of a plurality of power domains, thereby calculating the power consumption of various paths of submodules to be measured or subsystems to realize quick positioning and confirmation of abnormal power consumption problem and furtheraccelerating the research and development and maintenance speed of electric appliances.

Description

technical field [0001] The invention belongs to the technical field of power detection, and in particular relates to a method for quickly measuring the power consumption of an internal circuit of an electric device. Background technique [0002] The operation of detecting the power consumption of the internal circuit of electrical equipment is not only often encountered in the process of R & D and design of circuit boards, but also often implemented in the process of testing and maintenance of electrical equipment in the future, so as to locate and determine the location of abnormal problems . Therefore, the detection efficiency of power consumption directly affects the development and maintenance efficiency of electrical equipment. [0003] The following takes an internal circuit board of a mobile phone product as an example for specific description. [0004] With the increasing number of mobile phone functions, the power supply design inside the mobile phone is also beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/06
Inventor 王琦
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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