CN106686832B - A kind of diode control circuit and switching power circuit - Google Patents
A kind of diode control circuit and switching power circuit Download PDFInfo
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- CN106686832B CN106686832B CN201710104042.3A CN201710104042A CN106686832B CN 106686832 B CN106686832 B CN 106686832B CN 201710104042 A CN201710104042 A CN 201710104042A CN 106686832 B CN106686832 B CN 106686832B
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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]
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Abstract
The invention discloses a kind of diode control circuit and switching power circuit, diode control circuit of the invention includes the first, second, third and fourth diode；The anode of first diode is connected to first node, and cathode is connected to ground；The anode of second diode is connected to second node, and cathode is connected to ground；The anode of third diode is connected to the cathode of the 4th diode, and is connected to second node；The anode of 4th diode is connected to the cathode of third diode, and is connected to first node.First state is that first node is low；Second node is low；Second state is that first node is low；Second node is high；The third state is that first node is high；Second node is low；4th state is that first node is high；Second node is high；5th state is that first node is high；Second node is hanging；6th state is that first node is hanging；Second node is high, and the present invention only needs two ports that can control the on and off of 4 LED, reduces system cost, and control method is simple.
Description
Technical field
The present invention relates to electronic technology fields, and in particular to is specifically related to a kind of diode control circuit and switch power supply
Road.
Background technique
Light emitting diode (LED) is frequently used for indicating circuit state in circuit, and user is facilitated to learn the work feelings of equipment
Condition.Refering to what is shown in Fig. 1, for a kind of display circuit of existing four light emitting diodes composition, the anode of Light-emitting diode LED 1
It is connected to the cathode of Light-emitting diode LED 2, the anode of Light-emitting diode LED 2 is connected to the cathode of Light-emitting diode LED 1, hair
The anode of optical diode LED1 is connected to the end COM, and the cathode of Light-emitting diode LED 1 is connected to the end LED12；Light emitting diode
The anode of LED3 is connected to the cathode of Light-emitting diode LED 4, and the anode of Light-emitting diode LED 4 is connected to Light-emitting diode LED 3
Cathode, the anode of Light-emitting diode LED 3 is connected to the end COM, and the cathode of Light-emitting diode LED 3 is connected to the end LED34.With reference to
Shown in Fig. 2, by the voltage at the control end COM, the end LED12 and the end LED34, LED1 can be controlled separately to LED4 on and off.Ginseng
It examines shown in Fig. 2 (a), the end COM is square-wave voltage, and the end LED12 is no-voltage, and when the end COM, voltage is height, the end LED12 voltage is low
When, then LED1 is bright, and LED2 goes out；When the end COM voltage be it is low, when the end LED12 voltage is low, then LED1 goes out, and LED2 goes out；Control COM
The square wave frequency at end is higher than the frequency that human eye can identify, such as 300Hz, then effect seen by person is LED1 bright, and LED2 goes out.Ginseng
It examines shown in Fig. 2 (b), the end COM is square-wave voltage, and the end LED12 is the square-wave voltage as the end COM, then LED1 and LED2 go out.
With reference to shown in Fig. 2 (c), the end COM is square-wave voltage, and the end LED12 is the square-wave voltage opposite with the end COM, i.e., the end COM voltage is height
When, then the end LED12 voltage is low, and when the end COM voltage is low, then the end LED12 voltage is height, then LED2 and LED2 are bright.LED3
It is identical with the control method of LED1 and LED2 with the control method of LED4.This method can control 4 LED by three ports
On and off.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of diode control circuit and switching power circuits, to solve
The problem that certainly prior art control port is more, control is complicated.
The technical solution of the invention is as follows, and providing a kind of diode control circuit includes: first diode, the two or two pole
Pipe, third diode and the 4th diode；The anode of first diode is connected to first node, the cathode connection of first diode
To ground；The anode of second diode is connected to second node, and the cathode of the second diode is connected to ground；The anode of third diode
It is connected to the cathode of the 4th diode, and is connected to second node；The anode of 4th diode is connected to third diode
Cathode, and it is connected to first node；
First state is that first node logic is low；Second node logic is low；
Or/and the second state be first node logic is low；Second node logic is height；
Or/and the third state be first node logic is high；Second node logic is low；
Or/and the 4th state be first node logic is high；Second node logic is height；
Or/and the 5th state be first node logic is high；Second node is hanging；
Or/and the 6th state be first node it is hanging；Second node logic is height；
The logic is that high expression voltage or electric current make diode current flow, and it is that voltage or electric current cannot that the logic, which is low,
Make diode current flow.
As optional, the first diode, second diode, the third diode and the 4th diode
For light emitting diode.
As optional, in the first state into the 6th state, switch between any number of states.
As optional, control state time scale shared in each period or/and adjust the logic as height
When voltage or size of current, flow through the average current of diode to adjust.
As optional, first mode is first diode conducting；
Or/and second mode be the first diode and second diode current flow；
Or/and the third mode be the first diode, second diode and the third diode current flow；
Or/and fourth mode be the first diode, second diode, the third diode and the described 4th
Diode current flow.
As optional, the first mode is the 5th state；It or is the 5th state and the first state
Switching；
Or/and the second mode be the 4th state；Or switch for the 4th state and the first state；
Or switch for the 5th state and the 6th state；It or is the first state and the 5th state and the 6th shape
State switching；
Or/and the third mode is that second state and the 5th state switch；Or for the first state,
Second state and the 5th state switching；
Or/and the fourth mode is that second state and the third state switch；Or for the first state,
Second state and third state switching.
As optional, in the first mode into the fourth mode, it is combined between any number of modes.
As optional, the first mode and second mode combination；
Or/and the second mode and the third mode combination；
Or/and the third mode and the fourth mode combination.
It is adjustable as time scale of optional, the combined both of which in each period.
As optional, successively switch from the first mode to the fourth mode.
As optional, the first node and the second node are the pin of chip.
Another technical solution of the invention is to provide a kind of switching power circuit.
Using circuit structure and method of the invention, compared with prior art, has the advantage that and only need two ports
The on and off of 4 LED can be controlled, reduce system cost, and control method is simple.
Detailed description of the invention
Fig. 1 is the circuit diagram of the prior art；
Fig. 2 (a) is in the prior art that LED1 is bright, the waveform diagram that LED2 goes out；
Fig. 2 (b) is in the prior art that LED1 goes out, the waveform diagram that LED2 goes out；
Fig. 2 (c) is in the prior art that LED1 is bright, LED2 bright waveform diagram；
Fig. 3 is circuit diagram of the invention.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
Refering to what is shown in Fig. 3, being circuit diagram of the invention.D1 in Fig. 1 is first diode, and D2 is the two or two pole
Pipe, D3 are third diode, and D4 is the 4th diode.The anode of first diode D1 is connected to first node A, first diode
The cathode of D1 is connected to ground；The anode of second diode D2 is connected to second node B, and the cathode of the second diode D2 is connected to
Ground；The anode of third diode D3 is connected to the cathode of the 4th diode D4, and is connected to second node B；4th diode
The anode of D4 is connected to the cathode of third diode D3, and is connected to first node A；
As shown in table 1, it is low that first state, which is first node A logic,；Second node B logic is low；Second state is the
One node A logic is low；Second node B logic is height；The third state is that first node A logic is high；Second node B logic is
It is low；4th state is that first node A logic is high；Second node B logic is height；5th state is that first node A logic is high；
Second node B is hanging；6th state is that first node A is hanging；Second node B logic is height；The logic is high expression voltage
Or electric current makes diode current flow, is indicated in table 1 with " 1 "；It is that voltage or electric current cannot be such that diode leads that the logic, which is low,
It is logical, it is indicated in table 1 with " 0 "；Vacantly indicated in table 1 with " X ".
It should be noted that logic is high voltage or electric current in the 5th state and the 6th state, one two can only be made
Pole pipe conducting, and two concatenated diode current flows cannot be made.By taking the 5th state as an example, first node A is height, second node B
Vacantly, then the voltage of A point or electric current can only be such that D1 is connected, and be not enough to that concatenated two diodes D2 and D4 is allowed to be connected.
Table 1
| State | A | B | D1 | D2 | D3 | D4 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 0 | 1 | 0 | 1 | 1 | 0 |
| 3 | 1 | 0 | 1 | 0 | 0 | 1 |
| 4 | 1 | 1 | 1 | 1 | 0 | 0 |
| 5 | 1 | X | 1 | 0 | 0 | 0 |
| 6 | X | 1 | 0 | 1 | 0 | 0 |
When first diode to the 4th diode is all Light-emitting diode LED, then it can pass through the control of above-mentioned A, B point
System, realizes different light emitting diode on and off.The electric current of Light-emitting diode LED is flowed through by adjusting, adjustable LED's is bright
Degree, it can by controlling the electric current of A, B point, to adjust the brightness of LED.A, B point can also be using voltage source series resistance
Form, by adjusting the size of voltage source or resistance, to control the electric current for flowing through LED.
Following embodiment is illustrated with first diode to the 4th diode is all Light-emitting diode LED.By in table 1
Six kinds of states switch over, to realize the combination of different LED on and off.
For example, four kinds of modes as shown in Table 2, be LED light common mode in circuit: mode 1, D1 is bright, D2-
D4 goes out；Mode 2, D1, D2 are bright, and D3, D4 go out；Mode 3, D1-D3 is bright, and D4 goes out；Mode 4, D1-D4 is bright.Wherein, mode 1 can be with
It is directly realized by the 5th state, mode 2 can be realized directly by the 4th state.Mode 3 and mode 4 are just needed to table
State in 1 switches over to realize.Mode 3 can be realized by the switching of the second state and the 5th state, work as switching
Frequency it is sufficiently high, such as be greater than 100Hz, then it is that the second state and the 5th state are switching that human eye, which is not seen, that is, see be by D2,
This bright state of D3 and this bright state of D1 are switching, and seen by person is D1-D3 all bright.When the second state and the 5th state
Shared time scale is equal in each period, then the brightness that D1-D3 is shown is also the same.If adjusting the second state
Time is longer than the 5th state, then the brightness that D2 and D3 are shown can more be highlighted than D1.A point and B under different conditions can also be passed through
The electric current of point, to control the display brightness of LED.Similarly, mode 1 can also be switched over by the 5th state and first state, with
Realize that D1 is bright, D2-D3 goes out；Mode 2 can also be switched over by the 4th state and first state or the 5th state and the 6th shape
State switching；Or first state, the 5th state and the switching of the 6th state, to realize that D1, D2 are bright, D3, D4 go out；Mode 3 can be with
Switched by first state, the second state and the 5th state, to realize that D1-D3 is bright, D4 goes out；Mode 4 can be by the second state and
Three condition switches over or first state, the second state and third state switching, to realize that D1-D4 is bright.
Table 2
| Mode | D1 | D2 | D3 | D4 |
| 1 | 1 | 0 | 0 | 0 |
| 2 | 1 | 1 | 0 | 0 |
| 3 | 1 | 1 | 1 | 0 |
| 4 | 1 | 1 | 1 | 1 |
In the circuit with indicator light, slave pattern 1 arrives mode 4, it is desirable to which when each indicator light is bright, brightness is all
The same, that is, when mode 1, the brightness of D1 is L1, then the brightness of D1 and D2 are all L1 under mode 2.
Mode 1 is realized by the 5th state, and the electric current of A point is I1, and the brightness of D1 is L1；Mode 1 can also pass through
5th state and first state switch over, and the 5th state time shared in each period is n, and the size of current of A point is
I1/n, wherein n is the numerical value less than 1, and the brightness that D1 equally may be implemented is L1.For example, the 5th state and first state are every
The shared time is equal in a period, and the size of current of A point is 2*I1, and the brightness that D1 may be implemented is L1.
Mode 2 realized by the 4th state, and it is all L1 that the electric current of A, B point, which is all the brightness of I1, D1 and D2,；Mode 2
It can also be switched over by first state and the 4th state, the 4th state time shared in each period is n, A, B point
Size of current be I1/n, wherein n is numerical value less than 1, and the brightness that D1 and D2 equally may be implemented all is L1.For example, the 4th
State and the first state time shared in each period are equal, and the size of current of A, B point is 2*I1, and D1 and D2 may be implemented
Brightness be all L1；Mode 2 can also be switched over by the 5th state and the 6th state, and the 5th state and the 6th state are every
The shared time is respectively half in a period, and the size of current of A, B point is 2*I1, and the brightness that D1 and D2 equally may be implemented all is
L1；Mode 2 can also be switched over by first state, the 5th state and the 6th state, and the 5th state and the 6th state are every
The shared time is respectively m in a period, wherein m is the positive number less than 0.5, and the size of current of A, B point is I1/m, equally can be with
The brightness for realizing D1 and D2 is all L1.
Mode 3 can be switched over by the 5th state and the second state, and the 5th state and the second state are in each period
In shared time be respectively half, the size of current of A, B point is 2*I1, and the brightness that D1-D3 equally may be implemented all is L1；Mode
3 can also be switched over by first state, the 5th state and the second state, and the 5th state and the second state are in each period
The shared time is respectively m, wherein m is the positive number less than 0.5, and the size of current of A, B point is I1/m, and D1-D3 equally may be implemented
Brightness be all L1.
Mode 4 can be switched over by the second state and the third state, and the second state and the third state are in each period
In shared time be respectively half, the size of current of A, B point is 2*I1, and the brightness that D1-D4 equally may be implemented all is L1；Mode
4 can also be switched over by first state, the second state and the third state, and the second state and the third state are in each period
The shared time is respectively m, wherein m is the positive number less than 0.5, and the size of current of A, B point is I1/m, and D1-D4 equally may be implemented
Brightness be all L1.
It is combined between four modes, then more display effects may be implemented, for example realize that D1 and D2 is bright, D3 dodges
It is bright, then it can be combined with mode 2 and mode 3 to realize.For example, mode 2 is switched by the 5th state and the 6th state
Come what is realized, mode 3 is realized by the 5th state and the switching of the second state, then, the 5th state, the 6th state and the
The sequencing of two-state these types state is can be arbitrary, as long as time scale is constant, not necessarily one
Lower one mode is completed and then entered to the state of kind mode.For example, can be the 6th state, the second state, the 5th state this
Kind implementation.
By the way that time scale of the combined both of which in each period is arranged, carry out adjustment display effect.For example it realizes
D1 and D2 are bright, D3 flashing, for example wish that D3 is to dodge for one second one, and the time of sudden strain of a muscle is 10ms, then the period is set to 1 second, mode 3
The shared time is 10ms, remaining time is the time of mode 2.And so on, by the above method, it is bright to may be implemented D1, D2
It dodges；D1-D2 is bright, and D3 dodges；D1-D3 is bright, the effect that D4 dodges.These effects are often used in electricity of the display battery in charge and discharge
Amount.
It is D1 bright there are also a kind of common display effect, D2 breathes (secretly brightening again dimmed)；D1-D2 is bright, D3 breathing；
D1-D3 is bright, D4 breathing.It is bright with D1, it is illustrated for D2 breathing.It can be realized by the combination of mode 1 and mode 2.One
Kind, which is achieved in that, to be adjusted in each period, time scale shared by mode 1 and mode 2, to adjust the brightness of D2.It is,
Time scale shared by mode 2 is higher, then D2 is brighter, and time scale shared by mode 2 is lower, then D2 is darker.Another method
When being adjustable mode 1 and mode 2, the electric current of A point and B point, to adjust the brightness of D2.Or regulating time and electric current simultaneously
To adjust brightness.
Another common display effect is horse race lamp, i.e., is switched to that D1, D2 are bright to be switched to D1-D3 all again from D1 is bright
It is bright, then to be switched to D1-D4 all bright, then to be switched to D1 bright or do not switch.This display effect can be directly switched to by mode 1
Mode 2, then it is switched to mode 3, it is finally switched to mode 4, then switching to mode 1 or not switching can be realized.
Above-mentioned displaying scheme can be applied in the various systems for needing LED indication.It is above-mentioned by taking battery management system as an example
Displaying scheme can serve to indicate that the working condition of electricity and battery management system.Battery management system is usually by power management
Chip carrys out control system work, then the program can be realized in power management chip, and first node A and second node B are
Two pins of chip, for LED light except chip, the program can reduce by a pin than existing scheme, and control simply,
It is convenient to realize, reduces system cost.
In addition to this, although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in this field
Those of ordinary skill apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and record is not known
Content, then can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (11)
1. a kind of diode control circuit, comprising: first diode, the second diode, third diode and the 4th diode；The
The anode of one diode is connected to first node, and the cathode of first diode is connected to ground；The anode of second diode is connected to
The cathode of second node, the second diode is connected to ground；The anode of third diode is connected to the cathode of the 4th diode, and
It is connected to second node；The anode of 4th diode is connected to the cathode of third diode, and is connected to first node；
First state is that first node logic is low；Second node logic is low；
Or/and the second state be first node logic is low；Second node logic is height；
Or/and the third state be first node logic is high；Second node logic is low；
Or/and the 4th state be first node logic is high；Second node logic is height；
Or/and the 5th state be first node logic is high；Second node is hanging；
Or/and the 6th state be first node it is hanging；Second node logic is height；
The logic is that high expression voltage or electric current make diode current flow, and it is that voltage or electric current cannot make two that the logic, which is low,
Pole pipe conducting；
The first diode, second diode, the third diode and the 4th diode are light emitting diode.
2. diode control circuit according to claim 1, it is characterised in that: in the first state to the 6th shape
In state, switch between any number of states.
3. diode control circuit according to claim 2, it is characterised in that: control the first state to the described 6th
Voltage or size of current when state time scale shared in each period or/and the adjusting logic are high, to adjust
Throttled the average current of diode.
4. diode control circuit according to claim 3, it is characterised in that:
When the diode control circuit is in first mode, the first diode shines；
Or/and when being in second mode, the first diode and second LED lighting；
Or/and be in the third mode when, the first diode, second diode and the third diode hair
Light；
Or/and be in fourth mode when, the first diode, second diode, the third diode and institute
State the 4th LED lighting.
5. diode control circuit according to claim 4, it is characterised in that:
When the diode control circuit is the first mode, the diode control circuit is in the 5th state；
Or switch for the 5th state and the first state；
Or/and when the diode control circuit is the second mode, the diode control circuit is in the described 4th
State；Or switch for the 4th state and the first state；Or it is cut for the 5th state and the 6th state
It changes；It or is the first state and the switching of the 5th state and the 6th state；
It is described second at the diode control circuit or/and when the diode control circuit is the third mode
State and the 5th state switching；It or is the first state, second state and the 5th state switching；
Or/and when the diode control circuit is the fourth mode, the diode control circuit is second shape
State and third state switching；It or is the first state, second state and third state switching.
6. diode control circuit according to claim 4, it is characterised in that: in one cycle, the first mode
Into the fourth mode, it is combined between any number of modes.
7. diode control circuit according to claim 6, it is characterised in that:
The first mode and second mode combination；
Or/and the second mode and the third mode combination；
Or/and the third mode and the fourth mode combination.
8. diode control circuit according to claim 7, it is characterised in that: combined both of which is in each period
Time scale it is adjustable.
9. diode control circuit according to claim 6, it is characterised in that: from the first mode to the 4th mould
Formula successively switches.
10. diode control circuit according to claim 1, it is characterised in that: the first node and second section
Point is the pin of chip.
11. a kind of switching power circuit, it is characterised in that: including the diode control as described in claim 1~10 any one
Circuit processed.
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| CN201710104042.3A CN106686832B (en) | 2017-02-24 | 2017-02-24 | A kind of diode control circuit and switching power circuit |
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| CN201710104042.3A CN106686832B (en) | 2017-02-24 | 2017-02-24 | A kind of diode control circuit and switching power circuit |
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| CN106686832B true CN106686832B (en) | 2019-04-02 |
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| CN107396489A (en) * | 2017-07-12 | 2017-11-24 | 成都芯源***有限公司 | LED indicating circuit |
| CN112969264A (en) * | 2021-02-07 | 2021-06-15 | 深圳市美矽微半导体有限公司 | RGB (Red, Green and blue) three-color lamp control circuit and control method thereof |
| CN113270916A (en) * | 2021-05-13 | 2021-08-17 | 阿理新能源科技(昆山)有限公司 | Lithium battery management control method |
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| WO2001001385A1 (en) * | 1999-06-29 | 2001-01-04 | Welles Reymond | Ac powered led circuits for traffic signal displays |
| CN101150903A (en) * | 2007-10-31 | 2008-03-26 | 深圳市和而泰电子科技有限公司 | A LED drive circuit and its control method |
| CN204597540U (en) * | 2015-04-23 | 2015-08-26 | 张宙 | Portable power source circuit |
| CN206481480U (en) * | 2017-02-24 | 2017-09-08 | 杰华特微电子（杭州）有限公司 | Diode control circuit and switching power circuit |
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2017
- 2017-02-24 CN CN201710104042.3A patent/CN106686832B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001001385A1 (en) * | 1999-06-29 | 2001-01-04 | Welles Reymond | Ac powered led circuits for traffic signal displays |
| CN101150903A (en) * | 2007-10-31 | 2008-03-26 | 深圳市和而泰电子科技有限公司 | A LED drive circuit and its control method |
| CN204597540U (en) * | 2015-04-23 | 2015-08-26 | 张宙 | Portable power source circuit |
| CN206481480U (en) * | 2017-02-24 | 2017-09-08 | 杰华特微电子（杭州）有限公司 | Diode control circuit and switching power circuit |
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| CN106686832A (en) | 2017-05-17 |
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