CN207234510U - A kind of solar panels discharge circuit and LED light control device - Google Patents
A kind of solar panels discharge circuit and LED light control device Download PDFInfo
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- CN207234510U CN207234510U CN201721526594.5U CN201721526594U CN207234510U CN 207234510 U CN207234510 U CN 207234510U CN 201721526594 U CN201721526594 U CN 201721526594U CN 207234510 U CN207234510 U CN 207234510U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a kind of solar panels discharge circuit and LED light control device, which includes the first PMOS tube, the 9th capacitance, second resistance, the 5th capacitance and the first capacitance；The drain electrode of first PMOS tube is as solar panels interface end, the source electrode of first PMOS tube is connected with the cathode of the 5th capacitance and one end of the first capacitance respectively, the grid of first PMOS tube and one end of second resistance connect, and the other end of the second resistance is connected with one end of the 9th capacitance；The other end, the anode of the 5th capacitance and the other end of the first capacitance of 9th capacitance connect GND ends.The device includes MCU process circuits and above-mentioned solar panels discharge circuit.This practical solar panels discharge circuit has the reverse connection prevention protection circuit based on metal-oxide-semiconductor, not only small power consumption, but also generating device can be avoided to damage, or even the situation of burn-up.The utility model can be widely applied in LED control fields as a kind of solar panels discharge circuit and LED light control device.
Description
Technical field
It the utility model is related to solar panels discharge technology, more particularly to a kind of solar panels discharge circuit and LED light
Control device.
Background technology
Technology word is explained：
GND ends：Common ground end.
PEGND ends：Protective grounding.
The lamp of intelligent lamp light controller (i.e. LED light control device), also referred to as programmable lamp dimmer, i.e. controller
Light path sequence is can to modify according to the needs of user, for example, the modification speed of light flash, the time, style, it is synchronous with
It is asynchronous etc..Also, the controller has good autgmentability, progress polylith control panel combination can be needed according to user
Synchronization, asynchronous operation etc., to reach the requirement of higher.In general, the controller uses reliable and stable microprocessor chip, such as
51 microcontrollers, as hardware controls core, are furnished with corresponding light program in the microprocessor chip, and host computer can be by micro-
The communication interface that processor chips carry is modified to the light program or burning again.
At present, it is energy saving and environmentally friendly in order to achieve the purpose that, solar panels module can be added in LED light control device, is realized
For luminous energy to electric transformation of energy, the electric energy obtained after conversion can be that storage battery charges.However, existing solar panels mould electric discharge in the block
Circuit does not have anti-reverse design protection, therefore, when user by the positive and negative anodes reversal connection of solar panels discharge circuit input
Port, then be easy to cause controller damage, or even burn-up.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model be to provide a kind of solar panels discharge circuit and
LED light control device, its anti-reverse design protection with low-power consumption, not only improves the safety and reliability that product works,
But also reach energy saving effect.
The first technical solution is used by the utility model：A kind of solar panels discharge circuit, including the first PMOS tube,
9th capacitance, second resistance, the 5th capacitance and the first capacitance；
The drain electrode of first PMOS tube is as solar panels interface end, and the source electrode of first PMOS tube is respectively with the 5th
One end of the cathode of capacitance and the first capacitance connects, and the grid of first PMOS tube and one end of second resistance connect, described
The other end of second resistance is connected with one end of the 9th capacitance；
The other end, the anode of the 5th capacitance and the other end of the first capacitance of 9th capacitance connect GND ends.
Further, the 11st capacitance is further included, the one of the 11st capacitance terminates GND ends, the 11st capacitance
Another termination PEGND ends.
Further, solar panels input interface, the first pin and first of the solar panels input interface are further included
The drain electrode connection of PMOS tube, the second pin of the solar panels input interface connect GND ends.
Further, the first NMOS tube, the 4th resistance, the 6th capacitance and the second capacitance are further included；
The drain electrode of first NMOS tube is connected with one end of the first capacitance, the grid of first NMOS tube and the 4th electricity
One end connection of resistance, the source electrode of first NMOS tube are connected with the cathode of the 6th capacitance and one end of the second capacitance respectively, institute
The other end of the anode and the second capacitance of stating the 6th capacitance connects GND ends.
Further, first capacitance and/or the second capacitance are ceramic disc capacitor.
Further, the 5th capacitance and/or the 6th capacitance are electrolytic capacitor.
The second technical solution is used by the utility model：A kind of LED light control device, including MCU process circuits with
And the solar panels discharge circuit of above-mentioned first technical solution, it is permanent that the MCU process circuits are connected to power supply circuit, LED
Flow drive circuit and charging and discharging lithium battery circuit, output terminal and the charging and discharging lithium battery circuit of the solar panels discharge circuit
Charging end connection, the charging and discharging lithium battery circuit for constant current driver circuit for LED power supply.
Further, solar panels voltage detecting circuit is further included, the solar panels voltage detecting circuit is connected to the sun
Can be between plate discharge circuit and MCU process circuits.
Further, charging and discharging lithium battery electric quantity detecting circuit is further included, the charging and discharging lithium battery electric quantity detecting circuit connects
It is connected between charging and discharging lithium battery circuit and MCU process circuits.
Further, the solar panels voltage detecting circuit includes the 14th resistance, the 19th resistance and the 23rd
Capacitance, one end of the 14th resistance are connected with one end of the first capacitance, and the other end of the 14th resistance is respectively with
The first input end connection of one end of 19 resistance, one end of the 23rd capacitance and MCU process circuits；19th electricity
The other end of the other end of resistance and the 23rd capacitance connects GND ends.
The beneficial effects of the utility model are：It is equipped with the solar panels discharge circuit of the utility model by the first PMOS
The reverse connection prevention protection circuit that pipe, second resistance and the 9th capacitance are formed, therefore, when solar panels reversal connection, the first PMOS tube
Grid is high level, the cut-off work of the first PMOS tube, and solar panels discharge circuit cannot be then formed into a loop at this time, in not working
State, so when solar panels reversal connection, can protect solar panels and discharge circuit well, avoid because of solar panels reversal connection and
Generating device damages, or even the situation of burn-up, greatly improves the safety and reliability of product work；It is additionally, since this practicality
Reverse connection prevention protection circuit in solar panels discharge circuit realizes that therefore, the reverse connection prevention protection circuit is not based on metal-oxide-semiconductor
Only small power consumption, reaches energy saving effect, but also has the advantages that to pass through electric current is big, pressure drop is small, temperature is low etc..
In addition, the first NMOS tube is additionally provided with the solar panels discharge circuit of the utility model, therefore by inputting low electricity
The grid of flat/high level to the first NMOS tube, makes the first NMOS tube be on/cut-off state, can so realize solar energy
Plate discharge circuit whether to lithium battery charging control, it can be seen that, can be according to actual feelings based on the setting of the first NMOS tube
Condition, whether the electric energy of control solar panels discharge circuit is exported to charging and discharging lithium battery circuit, so as to charge to lithium battery, so
The flexibility that circuit uses then is improved, and solar panels discharge circuit charges without exporting electric energy always for lithium battery, into
One step reaches energy saving effect.
Brief description of the drawings
Fig. 1 is a kind of electric circuit construction schematic diagram of solar panels discharge circuit of the utility model；
Fig. 2 is an a kind of specific embodiment electric circuit construction schematic diagram of solar panels discharge circuit of the utility model；
Fig. 3 is a specific embodiment knot of solar panels input interface in a kind of solar panels discharge circuit of the utility model
Structure schematic diagram；
Fig. 4 is a kind of structure diagram of LED light control device of the utility model；
Fig. 5 is a specific embodiment electric circuit construction schematic diagram of power supply circuit in Fig. 4；
Fig. 6 is a specific embodiment electric circuit construction schematic diagram of MCU process circuits in Fig. 4；
Fig. 7 is a specific embodiment electric circuit construction schematic diagram of constant current driver circuit for LED in Fig. 4；
Fig. 8 is a specific embodiment structure diagram of LED constant current driving output interface in Fig. 4；
Fig. 9 is a specific embodiment electric circuit construction schematic diagram of solar panels voltage detecting circuit in Fig. 4；
Figure 10 is a specific embodiment electric circuit construction schematic diagram of charging and discharging lithium battery circuit in Fig. 4；
Figure 11 is a specific embodiment structure diagram of lithium battery input interface in Fig. 4；
Figure 12 is a specific embodiment structure diagram of charging and discharging lithium battery electric quantity detecting circuit in Fig. 4.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the present embodiment provides a kind of solar panels discharge circuit, it includes the first PMOS tube Q1, the 9th electricity
Hold C9, second resistance R2, the 5th capacitance C5 and the first capacitance C1；
The drain electrode (equivalent to VLDKin ends) of the first PMOS tube Q1 is used as solar panels interface end, the first PMOS
The source electrode of pipe Q1 is connected with the cathode of the 5th capacitance C5 and one end of the first capacitance C1 respectively, the grid of the first PMOS tube Q1
It is connected with one end of second resistance R2, the other end of the second resistance R2 is connected with one end of the 9th capacitance C9；
The other end, the anode of the 5th capacitance C5 and the other end of the first capacitance C1 of the 9th capacitance C9 meets GND
End.Specifically, C9, C1 are polarity free capacitor, and C5 is polarized capacitance.In the present embodiment, the both ends of capacitance C1 are as the sun
The output terminal of energy plate discharge circuit, it can be connected with the charging end of charging and discharging lithium battery circuit, so as to pass through charging and discharging lithium battery
Circuit charges for lithium battery.
By above-mentioned as it can be seen that the concrete operating principle of this practical solar panels discharge circuit is：This solar panels electric discharge electricity
The reverse connection prevention protection circuit being made of Q1, R2, C9 is equipped with road, therefore, when solar panels just connect, the extremely low electricity of G of Q1 pipes
Flat, Q1 pipe ON operations, the electric current of solar panels output flows to anode from VLDKin ends by discharge circuit forming circuit, this
When, discharge circuit can work normally；When solar panels reversal connection, the G extremely high level of Q1 pipes, the cut-off work of Q1 pipes, puts at this time
Circuit cannot be formed into a loop, and circuit is in off position, to realize the protection of solar panels and circuit.As it can be seen that this reality
Solar panels discharge circuit has reverse connection prevention protection circuit, can to avoid because of solar panels reversal connection and generating device damage,
The even situation of burn-up, greatly improves the safety and reliability of product work.Moreover, this practical reverse connection prevention protection circuit is
Select metal-oxide-semiconductor therefore, to make discharge circuit not only small power consumption come what is realized, reach energy saving effect, but also have and pass through electric current
The advantages such as greatly, pressure drop is small, temperature is low.
The preferred embodiment of this circuit is further used as, it further includes the 11st capacitance C11, the 11st capacitance
The termination GND ends of C11, another termination PEGND ends of the 11st capacitance C11, can so play the work of circuit protection
With.
The preferred embodiment of this circuit is further used as, as shown in Fig. 2, it further includes the first NMOS tube Q2, the 4th electricity
Hinder R4, the 6th capacitance C6 and the second capacitance C2；
The drain electrode of the first NMOS tube Q2 is connected with one end of the first capacitance C1, the grid of the first NMOS tube Q2 with
One end connection of 4th resistance R4, the source electrode of the first NMOS tube Q2 cathode and the second capacitance C2 with the 6th capacitance C6 respectively
One end connection, the anode of the 6th capacitance C6 and the other end of the second capacitance C2 connect GND ends.Specifically, C6 is to have pole
Property capacitance, C2 is polarity free capacitor.In the present embodiment, output terminal of the both ends of capacitance C2 as solar panels discharge circuit,
It can be connected with the charging end of charging and discharging lithium battery circuit, so as to be charged by charging and discharging lithium battery circuit for lithium battery.
Specifically, this discharge circuit is provided with Q2, R4, C6 and C2, therefore, can be believed by input low level/high level
Number to Q2 grid, make Q2 be on/cut-off state, so can be according to actual needs, to control solar panels electric discharge electricity
Whether road charges to lithium battery, i.e., solar panels discharge circuit charges without persistently exporting electric energy for lithium battery, not only carries significantly
The flexibility and convenience that high circuit uses, and can also further reach energy saving effect.
Preferably, input to low level/high level signal of the grid of Q2 and provided by processor chips, at this time, processor
The signal output part of chip and the other end of R4 connect.
The preferred embodiment of this circuit is further used as, as shown in figure 3, it further includes solar panels input interface J1,
The first pin (including pin 3,4) of the solar panels input interface J1 is connected with the drain electrode of the first PMOS tube Q1, it is described too
The second pin (including pin 1,2) of positive energy plate input interface J1 connects GND ends.Specifically, J1 is 2.54 terminals of 4P, is used for
Access solar panels.
The preferred embodiment of this circuit, the first capacitance C1 and/or the second capacitance C2 are further used as tile electricity
Hold, the 5th capacitance C5 and/or the 6th capacitance C6 is electrolytic capacitor, their effect is to filter out and stablize input source.
By above-mentioned as it can be seen that for this practical solar panels discharge circuit, it is with the anti-reverse protection of solar panels component
Function, and whether to lithium battery charging control function.
As shown in figure 4, being based on above-mentioned solar panels discharge circuit, the present embodiment also provides a kind of LED light control device, its
Including MCU process circuits and above-mentioned solar panels discharge circuit, the MCU process circuits be connected to power supply circuit,
Constant current driver circuit for LED and charging and discharging lithium battery circuit, output terminal and the lithium battery charge and discharge of the solar panels discharge circuit
The charging end connection of circuit, the charging and discharging lithium battery circuit are powered for constant current driver circuit for LED.
The preferred embodiment of the present apparatus is further used as, the MCU process circuits are connected with solar panels discharge circuit.
The preferred embodiment of the present apparatus is further used as, it further includes solar panels voltage detecting circuit, the sun
Energy plate voltage detecting circuit is connected between solar panels discharge circuit and MCU process circuits.
The preferred embodiment of the present apparatus is further used as, it further includes charging and discharging lithium battery electric quantity detecting circuit, described
Charging and discharging lithium battery electric quantity detecting circuit is connected between charging and discharging lithium battery circuit and MCU process circuits.
For above-mentioned power supply circuit, MCU process circuits, constant current driver circuit for LED, solar panels discharge circuit, the sun
Can plate voltage detecting circuit, charging and discharging lithium battery circuit and charging and discharging lithium battery electric quantity detecting circuit, they it is specific preferably
Shown in being described below.
1., power supply circuit
Specifically, the power supply circuit is substantially in-line power circuit module, it is mainly used for providing for MCU process circuits
+ 5V operating voltages.
As shown in figure 5, the power supply circuit includes the 13rd resistance R13, the 18th resistance R18, adjustable output voltage
DC/DC switching regulator ICs U4, the 26th capacitance C26, the 17th resistance R17, the 27th capacitance C27, the 3rd inductance L3,
3rd diode D3 and the 22nd capacitance C22, and the connection relation between them is as shown in Figure 5.Wherein, capacitance C22
Voltage output end of the both ends as power supply circuit, output+5V operating voltages.
For the power supply circuit, its operation principle is：When providing input Vch-disch (constant voltage source), i.e. U4
VCC when terminating into Vch-disch, U4 is the DC/DC switch voltage-stabilizing device (models of an adjustable output voltage
MC33063), internal reference reference voltage is 1.25V；Wherein, U4, L3 and D3 form on-off circuit, pass through exterior divider resistance
R13 and R18 adjusts output voltage Uo, and formula is as follows：Uo=1.25V* (1+R13/R18).For example, when output voltage is 5V, 5V
=1.25* (1+3.6K Ω/1.2K Ω), i.e. R13=3.6K Ω, R18=1.2K Ω.
2., MCU process circuits
As shown in fig. 6, the MCU process circuits realize that U3 has been connected to source crystal oscillator mould using MCU microcontrollers U3
Block (includes the 15th capacitance C15, the 21st capacitance C21 and crystal oscillator Y1), and ISP interfaces J3；The MCU monolithics owner
It is used to output control signals to constant current driver circuit for LED, solar panels discharge circuit and charging and discharging lithium battery circuit；Detection
The electric signal collected from solar panels discharge circuit, charging and discharging lithium battery circuit.
Specifically, it is for MCU process circuits, its operation principle：For 8 MCU microcontroller, (model is U3
STM8S103F3-TSSOP2), its major function has STM8 cores, 8 bit data bus width, maximum clock stroboscopic 16MHZ, 8KB
Program storage, 1KB random access memorys, 10 ADC resolution ratio, working power scope 2.95V-5.5V, operating temperature model
Enclose -40~+85 DEG C, data-interface have an I2C, SPI, UART, multichannel hardware PWM, external interrupt and 3 timers etc.；
Wherein, I/O-PD3, I/O-PD2 and I/O-PC4 are ADC Analog-digital Converter interface pins, i.e. ADC translation interfaces,
These three pins of corresponding A DCvldk, ADCvbtin and ADCvbt respectively, are mainly used for solar panels, lithium battery and resistance
Input analog voltage is converted into numerical data；I/O-PC5, I/O-PC6 and I/O-PC7 are defeated for pwm pulse width modulation generator
Outgoing interface pin, i.e. PWM output interfaces, correspond to PWMled, PWMdch and PWMch these three pins respectively, wherein, PWMled is born
Duty adjusts output PWM value to control LED luminance, PWMch be responsible for adjusting output PWM value control solar panels discharge circuit whether to
Lithium battery charges, and PWMdch is responsible for adjusting output PWM value and controls whether to supply electricity to constant current driver circuit for LED.In addition, MCU is selected
External crystal-controlled oscillation is as clock signal, the exterior oscillating circuit of Y1, C15 and C21 composition；17th capacitance C17 and the 18th capacitance C18
Effect be filtering and bypass；12nd resistance R12 and the 20th capacitance C20 then forms RC low-level reset circuits, and effect is
Reset signal is provided when MCU microcontrollers power on until after power good, cancels reset signal；ISP interfaces J3 can for on-line system
Programming interface, for by the FLASH sections of program burn writing to MCU.
3., constant current driver circuit for LED
As shown in fig. 7, constant current driver circuit for LED is used to export constant current in certain output voltage range, at the same time
The change that brightness adjustment control realizes LED luminance can be carried out to ENA feet by pwm signal.Wherein, the I/O-PC5 of MCU microcontrollers,
That is PWMled, is connected with the ENA pins of driving chip in constant current driver circuit for LED.
Specifically, it is for constant current driver circuit for LED, its operation principle：U1, U2 are a constant current great power LED switches
Driver (model is NCL30160), its built-in MOSFET, high input voltage, high switching frequency, band PWM dimming functions and support
Height refreshes stroboscopic, can be adjusted LED current by resistance or pwm signal；
As the structure of two paths of LED constant-current drive circuit in Fig. 7 with principle is, therefore, herein only for wherein one
Road drive circuit carries out principle elaboration：First driving chip U1, the first inductance L1, current sampling resistor R6 (the 6th resistance) and R7
(the 7th resistance) forms the voltage-dropping type constant-current LED control circuit of the continuous inductive current pattern of a self-oscillation；When internal power is opened
Conducting is closed, Vdch electric currents flow to ground by LED, the first inductance L1, internal power switch and current sampling resistor R6, R7；When interior
Portion's power switch shut-off, Vdch electric currents form one by first inductance L1, LED and Schottky diode D1 (the first diode)
Discharge loop；8th resistance R8 and the 13rd capacitance C13, their effect are the time for setting internal power to switch；Inside ginseng
It is 0.2V to examine reference voltage, adjusts output current Io by current sampling resistor R6, R7, formula is as follows：Io=0.2V/ (R6*
R7/R6+R7).For example, output current is 714mA=0.2V/ (0.56 Ω *, 0.56 Ω /+0.56 Ω of 0.56 Ω), i.e. R6=R7=
0.56Ω。
As shown in figure 8, constant current driver circuit for LED is connected with LED constant current driving output interface J4.Specifically, J4 is 4P's
2.54 terminals, for accessing LED light source module.
4., solar panels discharge circuit
For the solar panels discharge circuit, its physical circuit is identical with the circuit in foregoing circuit embodiment, such as
Shown in Fig. 2.Specifically, the I/O-PC7 of MCU microcontrollers, i.e. PWMch pins, are connected with the other end of R4, and MCU microcontrollers pass through
I/O-PC7 exports low level/high level signal, and is exported by R4 to the grid of Q2.In the present embodiment, C2 both ends conduct
The output terminal of solar panels discharge circuit, it can be connected with the charging end of charging and discharging lithium battery circuit, so as to be filled by lithium battery
Discharge circuit charges for lithium battery.
5., solar panels voltage detecting circuit
Specifically, the solar panels voltage detecting circuit is mainly used for by electric resistance partial pressure one and is less than+5V voltage sources
ADC analog-digital converter collection voltages to MCU.
As shown in figure 9, the solar panels voltage detecting circuit include the 14th resistance R14, the 19th resistance R19 and
23rd capacitance C23, one end of the 14th resistance R14 are connected with one end of the first capacitance C1, the 14th resistance
The other end of R14 respectively one end with the 19th resistance R19, one end of the 23rd capacitance C23 and MCU process circuits
One input terminal (the first ADC translation interfaces) connects；The other end of the 19th resistance R19 and the 23rd capacitance C23's
The other end connects GND ends.In the present embodiment, the I/O-PD3 (the first ADC translation interfaces) of the other end of R14 and MCU microcontrollers
Connection, i.e., the other end of R14 is connected with ADCvldk pins.
For above-mentioned solar panels voltage detecting circuit, its operation principle is：By at the input voltage of solar panels,
Vldk ends i.e. in figure, that is, one end of C1, receiving voltage signal, and export one after two divider resistances R14 and R19
A voltage source is to MCU；Wherein, the effect of C23 is to filter out and stablize input source.
6., charging and discharging lithium battery circuit
For the charging and discharging lithium battery circuit, it mainly has an anti-reverse defencive function of lithium battery pack, and whether
Lithium battery is made to discharge to constant current driver circuit for LED, so that the control function for constant current driver circuit for LED power supply.
As shown in Figure 10, the charging and discharging lithium battery circuit includes first resistor R1, the second PMOS tube Q3,3rd resistor
R3, the tenth capacitance C10, the 7th capacitance C7, the 3rd capacitance C3, the second NMOS tube Q4, the 5th resistance R5, the 8th capacitance C8 and
Four capacitance C4；
One end (equivalent to VBTin ends) of the first resistor R1 is used as lithium battery interface end, the first resistor R1's
The other end is connected with the drain electrode of the second PMOS tube Q3, the source electrode of the second PMOS tube Q3 respectively with the cathode of the 7th capacitance C7 and
One end connection of 3rd capacitance C3, the grid of the second PMOS tube Q3 are connected with one end of 3rd resistor R3, the 3rd electricity
The other end of resistance R3 is connected with one end of the tenth capacitance C10；
The other end, the anode of the 7th capacitance C7 and the other end of the 3rd capacitance C3 of the tenth capacitance C10 meets GND
End；
The drain electrode of the second NMOS tube Q4 is connected with one end of the 3rd capacitance C3, the grid of the second NMOS tube Q4 with
One end connection of 5th resistance R5, the source electrode of the second NMOS tube Q4 cathode and the 4th capacitance C4 with the 8th capacitance C8 respectively
One end connection, the anode of the 8th capacitance C8 and another termination GND ends of the 4th capacitance C4.Specifically, the both ends of C3 are made
For the charging end of charging and discharging lithium battery circuit, it is connected with the output terminal of solar panels discharge circuit, in the present embodiment, C3's
One end and one end of C2 connect；C10, C3, C4 are polarity free capacitor, and C7, C8 are polarized capacitance；The I/O- of MCU microcontrollers
PC6, i.e. PWMdch pins, are connected with the other end of R5, and MCU microcontrollers are defeated by low level/high level signal by I/O-PC6
Go out, and exported by R5 to the grid of Q4；Discharge end of the both ends of C4 as charging and discharging lithium battery road, electricity is driven with LED constant current
The power end connection on road, powers for constant current driver circuit for LED, in the present embodiment, in one end and constant current driver circuit for LED of C4
U1, U2 chip VIN ends connection.
For above-mentioned charging and discharging lithium battery circuit, its operation principle is：In charging and discharging lithium battery circuit be equipped with by Q3, R3,
The reverse connection prevention protection circuit that C10 is formed, therefore, when lithium battery just connects, the G extremely low levels of Q3 pipes, Q3 ON operations, electric current
Anode is flowed to from VBTin ends by charge-discharge circuit forming circuit；When lithium battery reversal connection, the G extremely high level of Q3 pipes, Q3 pipes
End work, charge-discharge circuit cannot be formed into a loop at this time, circuit is in off position, to realize lithium battery and circuit
Protection.As it can be seen that this practical charging and discharging lithium battery circuit has reverse connection prevention protection circuit, can be sent out to avoid because of lithium battery reversal connection
Raw device failure, or even the situation of burn-up, greatly improve the safety and reliability of product work；Moreover, this practicality lithium battery
The reverse connection prevention protection circuit of charge-discharge circuit is to select metal-oxide-semiconductor to realize, therefore, makes charge-discharge circuit not only small power consumption, reaches
Energy saving effect, but also have the advantages that to pass through electric current is big, pressure drop is small, temperature is low etc..
In addition, being provided with Q4, R5, C8 and C4 in charging and discharging lithium battery circuit, therefore, low electricity is exported using MCU microcontrollers
The grid of flat/high level signal to Q4, it is on or off work that just can control Q4, to realize whether drive electricity to LED constant current
The control of road power supply, so can according to actual needs, to control whether to power for constant current driver circuit for LED, i.e., lithium battery without
Constant current driver circuit for LED power supply need to be continuously by charging and discharging lithium battery circuit, not only greatly improves the flexibility that circuit uses
And convenience, and can also further reach energy-saving effect.
The preferred embodiment of charging and discharging lithium battery circuit is further used as, the 3rd the capacitance C3 and/or C4 are tile
Capacitance, the 7th capacitance C7 and/or the 8th capacitance C8 are electrolytic capacitor, their effect is to filter out and stablize input source.
The preferred embodiment of charging and discharging lithium battery circuit is further used as, as shown in figure 11, it is defeated that it further includes lithium battery
The first pin (including pin 3,4) of incoming interface J2, the lithium battery input interface J2 are connected, institute with one end of first resistor R1
The second pin (including pin 1,2) for stating lithium battery input interface J2 connects GND ends.Specifically, J2 is 2.54 terminals of 4P, is used
In access lithium battery.
7., charging and discharging lithium battery electric quantity detecting circuit
Specifically, the charging and discharging lithium battery electric quantity detecting circuit is mainly used for electric less than+5V by electric resistance partial pressure one
Potential source gathers the voltage of lithium battery and sampling resistor to the ADC analog-digital converters of MCU, so can be by the electricity that collects
Press the current electricity of lithium battery is calculated.
As shown in figure 12, the charging and discharging lithium battery electric quantity detecting circuit contains lithium battery voltage Acquisition Circuit and sampling
Resistive voltage Acquisition Circuit, wherein hardware are made of two component pressures, and one of which includes two resistance R15, R20 and a capacitance
C24, another group then includes two resistance R16, R21 and a C25.Due to lithium battery voltage Acquisition Circuit and sampling resistor voltage
The structure of Acquisition Circuit is identical, therefore, to being wherein described in detail all the way.
The lithium battery voltage Acquisition Circuit includes the 15th resistance R15, the 20th resistance R20 and the 24th capacitance
C24, one end of the 15th resistance R15 are connected with one end of first resistor R1, the other end point of the 15th resistance R15
One end of one end, the 24th capacitance C24 and the second input terminal (second of MCU process circuits not with the 20th resistance R20
ADC translation interfaces) connection；The other end of the 20th resistance R20 and the other end of the 24th capacitance C24 meet GND
End.Specifically, in the present embodiment, the other end of R15 connects with the I/O-PD2 in the 2nd ADC translation interfaces of MCU microcontrollers
Connect, i.e., the other end of R14 is connected with ADCvbtin pins.
And for sampling resistor voltage collection circuit, its structure is identical with the structure of above-mentioned lithium battery voltage Acquisition Circuit,
Mainly it is made of the 16th resistance R16, the 21st resistance R21 and the 25th capacitance C25, at the other end and MCU of R16
Manage the second input terminal (the 2nd ADC translation interfaces) connection of circuit；One end of R16 and the other end of R1 connect.Specifically, at this
In embodiment, the other end of R16 is connected with the I/O-PC4 in the 2nd ADC translation interfaces of MCU microcontrollers, i.e. the other end of R16
It is connected with ADCvbt pins.
For above-mentioned charging and discharging lithium battery electric quantity detecting circuit, its operation principle is：Pass through the input voltage in lithium battery
End and sampling resistor end, collect two voltage sources exported through two bleeder circuits to MCU, according to this collected
Two magnitudes of voltage, can calculate the electric current for flowing through resistance, so as to change the current electric quantity for drawing lithium battery.Wherein, for C24,
C25, their effect are to filter out and stablize input source.
Above is the preferable of the utility model is implemented to be illustrated, but the invention is not limited to the reality
Example is applied, those skilled in the art can also make a variety of equivalent changes on the premise of without prejudice to the utility model spirit
Shape or replacement, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (10)
- A kind of 1. solar panels discharge circuit, it is characterised in that：Including the first PMOS tube, the 9th capacitance, second resistance, the 5th electricity Appearance and the first capacitance；The drain electrode of first PMOS tube as solar panels interface end, the source electrode of first PMOS tube respectively with the 5th capacitance Cathode and the first capacitance one end connection, one end of the grid of first PMOS tube and second resistance connects,The other end of the second resistance is connected with one end of the 9th capacitance；The other end, the anode of the 5th capacitance and the other end of the first capacitance of 9th capacitance connect GND ends.
- A kind of 2. solar panels discharge circuit according to claim 1, it is characterised in that：The 11st capacitance is further included, it is described One termination GND ends of the 11st capacitance, another termination PEGND ends of the 11st capacitance.
- A kind of 3. solar panels discharge circuit according to claim 1, it is characterised in that：Solar panels input is further included to connect Mouthful,First pin of the solar panels input interface is connected with the drain electrode of the first PMOS tube, the solar panels input interface Second pin connect GND ends.
- 4. according to a kind of any one of claim 1-3 solar panels discharge circuits, it is characterised in that：Further include the first NMOS Pipe, the 4th resistance, the 6th capacitance and the second capacitance；The drain electrode of first NMOS tube is connected with one end of the first capacitance, the grid of first NMOS tube and the 4th resistance One end connects, and the source electrode of first NMOS tube is connected with the cathode of the 6th capacitance and one end of the second capacitance respectively, and described the The other end of the anode of six capacitances and the second capacitance connects GND ends.
- A kind of 5. solar panels discharge circuit according to claim 4, it is characterised in that：First capacitance and/or second Capacitance is ceramic disc capacitor.
- A kind of 6. solar panels discharge circuit according to claim 4, it is characterised in that：5th capacitance and/or the 6th Capacitance is electrolytic capacitor.
- A kind of 7. LED light control device, it is characterised in that：Including MCU process circuits and claim 1-6 any one of them Solar panels discharge circuit, the MCU process circuits are connected to power supply circuit, constant current driver circuit for LED and lithium battery Charge-discharge circuit, the output terminal of the solar panels discharge circuit are connected with the charging end of charging and discharging lithium battery circuit, the lithium Battery charge-discharge circuit is powered for constant current driver circuit for LED.
- A kind of 8. LED light control device according to claim 7, it is characterised in that：Further include solar panels voltage detecting electricity Road,The solar panels voltage detecting circuit is connected between solar panels discharge circuit and MCU process circuits.
- A kind of 9. LED light control device according to claim 8, it is characterised in that：Further include the inspection of charging and discharging lithium battery electricity Slowdown monitoring circuit, the charging and discharging lithium battery electric quantity detecting circuit are connected between charging and discharging lithium battery circuit and MCU process circuits.
- A kind of 10. LED light control device according to claim 8 or claim 9, it is characterised in that：The solar panels voltage detecting Circuit includes the 14th resistance, the 19th resistance and the 23rd capacitance, one end and the first capacitance of the 14th resistance One end connection, the other end of the 14th resistance respectively one end with the 19th resistance, the 23rd capacitance one end with And the first input end connection of MCU process circuits；The other end of 19th resistance and the other end of the 23rd capacitance Connect GND ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721526594.5U CN207234510U (en) | 2017-11-15 | 2017-11-15 | A kind of solar panels discharge circuit and LED light control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721526594.5U CN207234510U (en) | 2017-11-15 | 2017-11-15 | A kind of solar panels discharge circuit and LED light control device |
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| CN207234510U true CN207234510U (en) | 2018-04-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121259A (en) * | 2018-10-23 | 2019-01-01 | 泉芯电子技术(深圳)有限公司 | Intelligent LED Constant Current Control System and its control method |
| CN113628398A (en) * | 2021-07-08 | 2021-11-09 | 汉得利（常州）电子股份有限公司 | Novel alarm based on digital pulse drive |
-
2017
- 2017-11-15 CN CN201721526594.5U patent/CN207234510U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121259A (en) * | 2018-10-23 | 2019-01-01 | 泉芯电子技术(深圳)有限公司 | Intelligent LED Constant Current Control System and its control method |
| CN109121259B (en) * | 2018-10-23 | 2024-02-06 | 泉芯电子技术(深圳)有限公司 | Intelligent LED constant current control system and control method thereof |
| CN113628398A (en) * | 2021-07-08 | 2021-11-09 | 汉得利（常州）电子股份有限公司 | Novel alarm based on digital pulse drive |
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