CN205453158U - Portable power source's current detection module - Google Patents
Portable power source's current detection module Download PDFInfo
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- CN205453158U CN205453158U CN201520953190.9U CN201520953190U CN205453158U CN 205453158 U CN205453158 U CN 205453158U CN 201520953190 U CN201520953190 U CN 201520953190U CN 205453158 U CN205453158 U CN 205453158U
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- current detection
- power source
- portable power
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Abstract
The utility model provides a portable power source's current detection module, relates to portable power source, in particular to portable power source's current detection circuit. Portable power source's current detection module including current detection resistance R41, is equipped with electric current signal amplifier U7, and electric current signal amplifier U7's positive input terminal is connected to current detection resistance R41's one end, and electric current signal amplifier U7's reverse pumping incoming end is connected to the output through resistance R47, and electric current signal amplifier U7's reverse pumping incoming end passes through resistance R46 ground connection, current detection resistance R41's resistance drops 20% to. The utility model discloses can reduce USB output end of cathode's pressure drop, promote output voltage and reach the MFI standard under the certain circumstances of booster voltage, reduce the loss, reduce the temperature rise.
Description
Technical field
This utility model relates to portable power source, particularly to the current detection circuit of portable power source.
Background technology
Existing conventional portable power source cell voltage rises to 5V and is connected to USB port, and USB negative pole connects 0.05R battery as current detecting.But current sense resistor resistance is too big, and output voltage is too low, loss is big, does not reaches Fructus Mali pumilae MFI voltage standard.As shown in Figure 2, as a example by 2.4A current standard, voltage intermediate value after boosting is 5.15V, the tolerance of positive and negative 2%, voltage is 0.103V, current sense resistor 0.05R, pressure drop on current sense resistor is 0.12V, after boosting, minimum voltage is 5.047V, and deducting the pressure drop on current sense resistor is 4.927V, does not reaches more than the 4.97V of Fructus Mali pumilae MFI standard.
Summary of the invention
The purpose of this utility model is to provide the current detection module of the satisfactory portable power source of a kind of output voltage.
The technical scheme that this utility model is used by reaching above-mentioned purpose is: the current detection module of a kind of portable power source, including current sense resistor R41, it is provided with current signal amplifier U7, the positive input terminal of current signal amplifier U7 is connected to one end of current sense resistor R41, the anti-input of current signal amplifier U7 is connected to outfan by resistance R47, and the anti-input of current signal amplifier U7 passes through resistance R46 ground connection.
Further, described current signal amplifier U7 is OP11 operational amplifier, and the resistance of resistance R41 is 0.01 ohm, and the resistance of resistance R46 is 1 kilohm, and the resistance of resistance R47 is 10 kilohms.
This utility model can reduce the pressure drop of USB negative pole of output end, promotes output voltage and reaches MFI standard, reduce loss, reduce temperature rise in the case of booster voltage is certain.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of this utility model preferred embodiment；
Fig. 2 is the circuit theory diagrams of prior art.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As shown in Figure 1, a kind of current detection module of portable power source, including current sense resistor R41, it is provided with current signal amplifier U7, the positive input terminal of current signal amplifier U7 is connected to one end of current sense resistor R41, the anti-input of current signal amplifier U7 is connected to outfan by resistance R47, and the anti-input of current signal amplifier U7 passes through resistance R46 ground connection.
Current sense resistor is changed into 0.01 ohm by the present embodiment, increases a current signal amplifier.The resistance of current sense resistor R41 is down to 20% by present mode.
In being contrasted by Fig. 1 Yu Fig. 2, it can be seen that described current signal amplifier U7 is OP11 operational amplifier, and the resistance of resistance R41 is 0.01 ohm, and the resistance of resistance R46 is 1 kilohm, and the resistance of resistance R47 is 10 kilohms.
This utility model reduces the pressure drop of USB negative pole of output end, promotes output voltage and reaches MFI standard, reduce loss, reduce temperature rise in the case of booster voltage is certain.As a example by 2.4A current standard, the pressure drop after improvement is only 0.024V, reduces 80% than the pressure before improving.
Claims (2)
1. the current detection module of a portable power source, including current sense resistor R41, it is characterized in that: be provided with current signal amplifier U7, the positive input terminal of current signal amplifier U7 is connected to one end of current sense resistor R41, the anti-input of current signal amplifier U7 is connected to outfan by resistance R47, and the anti-input of current signal amplifier U7 passes through resistance R46 ground connection.
The current detection module of portable power source the most according to claim 1, it is characterized in that: described current signal amplifier U7 is OP11 operational amplifier, the resistance of resistance R41 is 0.01 ohm, and the resistance of resistance R46 is 1 kilohm, and the resistance of resistance R47 is 10 kilohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520953190.9U CN205453158U (en) | 2015-11-25 | 2015-11-25 | Portable power source's current detection module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520953190.9U CN205453158U (en) | 2015-11-25 | 2015-11-25 | Portable power source's current detection module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205453158U true CN205453158U (en) | 2016-08-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520953190.9U Active CN205453158U (en) | 2015-11-25 | 2015-11-25 | Portable power source's current detection module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205453158U (en) |
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2015
- 2015-11-25 CN CN201520953190.9U patent/CN205453158U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523000 Guangdong city of Dongguan province Tangxia Zhenlong town B Jiao Tong Road No. 6 building A Patentee after: Austrian sea Polytron Technologies Inc, Dongguan Address before: 523000 Guangdong city of Dongguan province Tangxia Zhenlong town B Jiao Tong Road No. 6 building A Patentee before: Dongguan City Ao Hai Power Technology Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |