CN106255276A - A kind of power driving circuit - Google Patents
A kind of power driving circuit Download PDFInfo
- Publication number
- CN106255276A CN106255276A CN201610847091.1A CN201610847091A CN106255276A CN 106255276 A CN106255276 A CN 106255276A CN 201610847091 A CN201610847091 A CN 201610847091A CN 106255276 A CN106255276 A CN 106255276A
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- China
- Prior art keywords
- mos pipe
- resistance
- light emitting
- emitting diode
- pin
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The power driving circuit of the application, with the most extremely first pin of the second light emitting diode D2, the negative pole end of the second light emitting diode D2 is the second pin, and circuit module and the first pin that a 2nd mos pipe M2 and mos pipe M1 is constituted connect；Circuit module and the second pin that 3rd mos pipe M3 and the 4th mos pipe M4 is constituted connect.Thus, by foregoing circuit structure, i.e. may utilize two pins and drive four LED, not only save pin, and the power pins multiplex circuit simple in construction of the application, owing to the brightness of LED is only relevant with resistance R1 and resistance R2, and resistance R1 and resistance R2 is the resistance of chip internal, matching degree is high, it is easy to accomplish that resistance is identical, the display brightness that can make LED is consistent, promotes Consumer's Experience.
Description
Technical field
The application relates to electronic circuit technology field, particularly relates to a kind of power driving circuit.
Background technology
Along with smart mobile phone and the at full speed of wearable device are popularized, round the power management core of battery particularly lithium battery
Sheet gets more and more, in the application of lithium battery managing chip, such as managing chip or some other Charge Management of portable power source
In, it is common that a pin correspondence drives the working forms of a LED state display lamp, if i.e. power supply makes of four LEDs
State indicates, and conventional method is to drive four LEDs to show respectively with four pins.
The pin that above-mentioned drive circuit needs is more, and the element of use is more, thus as it is shown in figure 1, in prior art
Also follow-on scheme utilizing two pins to drive four lamps is occurred in that, in the lump with reference to as in figure 2 it is shown, M1 ~ M4 believes with PWM
Number drive, and a cycle, be divided into four 1/4 cycles, control the conducting dutycycle of LED1 ~ LED4.In order to ensure every LEDs
Brightness is consistent, needs periphery to increase current-limiting resistance Rex.As a example by LED1 and LED2: when LED1 and LED2 is the brightest, LED1 electric current from
BAT is through mos pipe M2, resistance R1, LED 1 and resistance Rex to GND；LED 2 electric current then have passed through
Mos pipe M2, resistance R1, LED 2, resistance R2 and mos pipe M3.Ignore the impedance of metal-oxide-semiconductor, then LED1 (LED2) electricity
Stream is main by R1 (R1), VLED1(VLED2) and Rex(R2) decision.And in IC chip internal, resistance R1 and the resistance of resistance R2
Identical, voltage VLED1 with VLED2 of same batch LED is the most identical, then, as long as ensureing that the resistance of Rex with R2 is identical, i.e.
Can ensure that the current value of LED1 with LED2 is consistent.But, this circuit has a shortcoming the biggest, i.e. must add outside one
Portion's resistance, and existing technique, it is difficult to the resistance making non-essential resistance Rex is consistent with the resistance of chip internal resistance R1 or R2,
Although the type of drive of the most this display lamp has saved driving pin, but drives instability, the brightness of each display lamp is held
Inconsistent phenomenon easily occurs.
Inventor finds in prior art is studied for a long period of time and put into practice, and does not temporarily also have a kind of driving in prior art
Display mode, can carry out stable driving with less pin to display lamp and show, it is difficult to make multiple display lamps of power supply
Brightness keeps consistent, reduces Consumer's Experience.
Summary of the invention
The application provides a kind of power driving circuit, the brightness of each display lamp of power supply can be made to keep consistent, promote
Consumer's Experience.
According to the first aspect of the application, the application provides a kind of power driving circuit, including: the first light emitting diode
D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4, also include: a mos pipe M1,
2nd mos pipe M2, the 3rd mos pipe M3 and the 4th mos pipe M4；The positive pole of described first light emitting diode D1 with described 4th
The negative pole of optical diode D4 connects, the minus earth of described first light emitting diode D1；Described 3rd light emitting diode D3 is just
Pole is connected with the positive pole of described 4th light emitting diode D4, and negative pole is connected with the negative pole of described first light emitting diode D1；Described
The negative pole of the second light emitting diode D2 is connected with the positive pole of described 4th light emitting diode D4, positive pole and described first light-emitting diodes
The positive pole of pipe D1 connects；
The source electrode of described 2nd mos pipe M2 connects power supply, one end of drain electrode connecting resistance R1, another termination of described resistance R1 described the
The drain electrode of one mos pipe M1, the source ground of a described mos pipe M1；The drain electrode of a described mos pipe M1 is luminous with described second
The negative pole of diode D2 connects；The source electrode of described 4th mos pipe M4 meets power supply, one end of drain electrode connecting resistance R2, described resistance R2
Another terminate described 3rd mos pipe M3 drain electrode, the source ground of described 3rd mos pipe M3；The leakage of described 3rd mos pipe M3
Pole is connected with the negative pole of described second light emitting diode D2.
The power driving circuit of the application, with the most extremely first pin of the second light emitting diode D2, the second light-emitting diodes
The negative pole end of pipe D2 is the second pin, and circuit module and the first pin that a 2nd mos pipe M2 and mos pipe M1 is constituted connect；
Circuit module and the second pin that 3rd mos pipe M3 and the 4th mos pipe M4 is constituted connect.Thus, by foregoing circuit structure, i.e.
Available two pins drive four LED, have not only saved pin, and the power pins multiplex circuit structure letter of the application
Single, owing to the brightness of LED is only relevant with resistance R1 and resistance R2, and resistance R1 and resistance R2 is the resistance of chip internal,
Degree of joining is high, it is easy to accomplish that resistance is identical, and the display brightness that can make LED is consistent, promotes Consumer's Experience.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the application and advantage are from combining the accompanying drawings below description to embodiment and will become
Obtain substantially with easy to understand, wherein:
Fig. 1 is the structural representation of the power driving circuit of prior art；
Fig. 2 is the sequential chart of power driving circuit of the prior art；
Fig. 3 is the structural representation of the power driving circuit of the embodiment of the present application one.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention the application is described in further detail.The application provides a kind of electricity
Source driving circuit, can make the display brightness of each LED keep consistent, promote Consumer's Experience.
Embodiment one:
Refer to the structural representation of the power driving circuit that Fig. 3, Fig. 3 are the embodiment of the present application one, as it is shown on figure 3, the application
Embodiment provides a kind of power driving circuit, specifically may include that
First light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4.Separately
Outward, the circuit of the present embodiment also includes: a mos pipe M1, the 2nd mos pipe M2, the 3rd mos pipe M3 and the 4th mos pipe M4.
The positive pole of the first light emitting diode D1 and the negative pole of the 4th light emitting diode D4 connect, the first light emitting diode D1's
Minus earth.The positive pole of the 3rd light emitting diode D3 and the positive pole of the 4th light emitting diode D4 connect, negative pole and the first luminescence two
The negative pole of pole pipe D1 connects.The positive pole of the negative pole of the second light emitting diode D2 and the 4th light emitting diode D4 connects, positive pole and the
The positive pole of one light emitting diode D1 connects.
The source electrode of the 2nd mos pipe M2 connects power supply, one end of drain electrode connecting resistance R1, another termination the oneth mos pipe of resistance R1
The drain electrode of M1, the source ground of a mos pipe M1.The drain electrode of the oneth mos pipe M1 is connected with the negative pole of the second light emitting diode D2.
The source electrode of the 4th mos pipe M4 connects power supply, one end of drain electrode connecting resistance R2, another termination the 3rd mos pipe of resistance R2
The drain electrode of M3, the source ground of the 3rd mos pipe M3.The drain electrode of the 3rd mos pipe M3 is connected with the negative pole of the second light emitting diode D2.
It can be seen that the positive pole of the second above-mentioned light emitting diode D2 is the first pin PIN1, the second light emitting diode D2
Negative pole end be the second pin PIN2, the annexation between an above-mentioned 2nd mos pipe M2 and mos pipe M1, with, the 3rd mos
Annexation between pipe M3 and the 4th mos pipe M4 is identical.The circuit mould that a 2nd mos pipe M2 and mos pipe M1 is constituted
Block and the first pin connect；Circuit module and the second pin that 3rd mos pipe M3 and the 4th mos pipe M4 is constituted connect.Thus, logical
Cross foregoing circuit structure, i.e. may utilize two pins and drive four LED, not only saved pin, and the power supply of the application
Pin multiplexing circuit structure is simple, and owing to the brightness of LED is only relevant with resistance R1 and resistance R2, and resistance R1 and resistance R2 is
The resistance of chip internal, matching degree is high, it is easy to accomplish that resistance is identical, and the display brightness that can make LED is consistent, promotes and uses
Family is experienced.
In one preferred embodiment, the 2nd mos pipe M2 and the 4th mos pipe M4 uses the mos pipe of P-channel.
In one preferred embodiment, resistance R1 and resistance R2 uses material of the same race to make.The resistance that material of the same race is made,
Can as much as possible resistance R1 be accomplished in the same size with the resistance of resistance R2, reduce the error of resistance sizes, so that each
The display brightness display of LED keeps consistent.
Above content is to combine the further description that the application is made by specific embodiment, it is impossible to assert this Shen
Being embodied as please is confined to these explanations.For the application person of an ordinary skill in the technical field, do not taking off
On the premise of the application conceives, it is also possible to make some simple deduction or replace.
Claims (3)
1. a power driving circuit, including: the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode
D3 and the 4th light emitting diode D4, it is characterised in that also include: the oneth mos pipe M1, the 2nd mos pipe M2, the 3rd mos pipe M3
And the 4th mos pipe M4；
The positive pole of described first light emitting diode D1 is connected with the negative pole of described 4th light emitting diode D4, described first luminescence two
The minus earth of pole pipe D1；The positive pole of described 3rd light emitting diode D3 is connected with the positive pole of described 4th light emitting diode D4,
Negative pole is connected with the negative pole of described first light emitting diode D1；The negative pole of described second light emitting diode D2 is luminous with the described 4th
The positive pole of diode D4 connects, and positive pole is connected with the positive pole of described first light emitting diode D1；
The source electrode of described 2nd mos pipe M2 connects power supply, one end of drain electrode connecting resistance R1, another termination of described resistance R1 described the
The drain electrode of one mos pipe M1, the source ground of a described mos pipe M1；The drain electrode of a described mos pipe M1 is luminous with described second
The negative pole of diode D2 connects；
The source electrode of described 4th mos pipe M4 connects power supply, one end of drain electrode connecting resistance R2, another termination of described resistance R2 described the
The drain electrode of three mos pipe M3, the source ground of described 3rd mos pipe M3；The drain electrode of described 3rd mos pipe M3 is luminous with described second
The negative pole of diode D2 connects.
2. power driving circuit as claimed in claim 1, it is characterised in that described 2nd mos pipe M2 and described 4th mos pipe
M4 uses the mos pipe of P-channel.
3. power driving circuit as claimed in claim 1 or 2, it is characterised in that described resistance R1 and described resistance R2 uses
Material of the same race is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847091.1A CN106255276A (en) | 2016-09-23 | 2016-09-23 | A kind of power driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847091.1A CN106255276A (en) | 2016-09-23 | 2016-09-23 | A kind of power driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106255276A true CN106255276A (en) | 2016-12-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847091.1A Pending CN106255276A (en) | 2016-09-23 | 2016-09-23 | A kind of power driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106255276A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932157A (en) * | 2010-06-24 | 2010-12-29 | 深圳市中庆微科技开发有限公司 | LED constant-current driven chip input circuit |
| CN102573223A (en) * | 2011-12-21 | 2012-07-11 | 惠州Tcl移动通信有限公司 | Indicating lamp control circuit for electric facilities, and mobile phone |
| CN102723056A (en) * | 2012-06-01 | 2012-10-10 | 深圳市明微电子股份有限公司 | LED display panel driving method, device, display system and equipment |
| CN105578663A (en) * | 2016-03-01 | 2016-05-11 | 深圳市富满电子集团股份有限公司 | LED display driving circuit |
| CN206118117U (en) * | 2016-09-23 | 2017-04-19 | 深圳市思远半导体有限公司 | Power driving circuit |
-
2016
- 2016-09-23 CN CN201610847091.1A patent/CN106255276A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932157A (en) * | 2010-06-24 | 2010-12-29 | 深圳市中庆微科技开发有限公司 | LED constant-current driven chip input circuit |
| CN102573223A (en) * | 2011-12-21 | 2012-07-11 | 惠州Tcl移动通信有限公司 | Indicating lamp control circuit for electric facilities, and mobile phone |
| CN102723056A (en) * | 2012-06-01 | 2012-10-10 | 深圳市明微电子股份有限公司 | LED display panel driving method, device, display system and equipment |
| CN105578663A (en) * | 2016-03-01 | 2016-05-11 | 深圳市富满电子集团股份有限公司 | LED display driving circuit |
| CN206118117U (en) * | 2016-09-23 | 2017-04-19 | 深圳市思远半导体有限公司 | Power driving circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20161221 |