CN208971215U - The LED state indicating circuit of charge power supply - Google Patents
The LED state indicating circuit of charge power supply Download PDFInfo
- Publication number
- CN208971215U CN208971215U CN201821920438.1U CN201821920438U CN208971215U CN 208971215 U CN208971215 U CN 208971215U CN 201821920438 U CN201821920438 U CN 201821920438U CN 208971215 U CN208971215 U CN 208971215U
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- circuit
- connect
- power supply
- charge power
- resistance
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Abstract
The utility model discloses a kind of LED state indicating circuits of charge power supply, for connecting between charge power supply and charging load, the circuit includes current rectifying and wave filtering circuit, current sampling circuit, operational amplification circuit, two-color diode driving circuit and high frequency transformer T1, the input terminal of the current rectifying and wave filtering circuit is connect with high frequency transformer T1, the output end of current rectifying and wave filtering circuit is connect with charging load, one end of the current sampling circuit is connect with the input terminal of charging load and operational amplification circuit, the other end of the current sampling circuit is grounded, the output end of the operational amplification circuit is connect with an input terminal of two-color diode driving circuit, another input terminal of the two-color diode driving circuit is connect with charge power supply, the two-color diode minus earth of the two-color diode driving circuit.It is few, at low cost that the utility model has the characteristics that element, and stand-by power consumption is small, meets the requirement of the stand-by power consumption of U.S. Department of Energy DOE IV and European Union CoC V5.
Description
[technical field]
It is small, at low cost more particularly to a kind of size and meet stand-by power consumption requirement the utility model relates to charging technique
Charge power supply LED state indicating circuit.
[background technique]
Charger is using power electronics semiconductor device, is direct current by voltage and the changeless convert alternating current of frequency
A kind of static ac equipment of electricity.Using battery as working power or the electricity consumption occasion of backup power source, charger has extensive
Application prospect.It is that its charged state is indicated by indicator light in charger charging process.However, existing charging indication
Element you are relatively more, the size that this allows for wiring board is big, increased costs.In addition, existing charging indication is standby
When power consumption it is big, the requirement of the stand-by power consumption of U.S. Department of Energy DOE IV and European Union CoC V5 is not achieved.
[utility model content]
It is small, at low cost and meet stand-by power consumption requirement that the purpose of the utility model is to solve the above problems and to provide a kind of sizes
Charge power supply LED state indicating circuit.
The LED state indicating circuit of the charge power supply of the utility model, for connecting between charge power supply and charging load,
The circuit includes current rectifying and wave filtering circuit, current sampling circuit, operational amplification circuit, two-color diode driving circuit and high frequency transformation
The input terminal of device T1, the current rectifying and wave filtering circuit are connect with high frequency transformer T1, and the output end of current rectifying and wave filtering circuit and charging are negative
Connection is carried, one end of the current sampling circuit is connect with the input terminal of charging load and operational amplification circuit, and the electric current is adopted
The other end of sample circuit is grounded, and the output end of the operational amplification circuit and an input terminal of two-color diode driving circuit connect
It connects, another input terminal of the two-color diode driving circuit is connect with charge power supply, the two-color diode driving circuit
Two-color diode minus earth.
The current rectifying and wave filtering circuit includes first diode D1 and first capacitor C1, the anode of the first diode D1 with
High frequency transformer T1 connection, cathode are connect with the anode of first capacitor C1 and charging load respectively, and the first capacitor C1's is negative
Pole ground connection.
The current sampling circuit is 3rd resistor R3, charging when acquisition charge power supply charges to charging load
Electric current.
The operational amplification circuit includes the first chip operational amplifier U1, first resistor R1 and second resistance R2, described
The non-inverting input terminal of first chip operational amplifier U1 and one end of current sampling circuit connect, the first chip operation amplifier
The inverting input terminal of device U1 is connect with one end of one end of first resistor R1 and second resistance R2 respectively, the first resistor R1's
Other end ground connection, the other end of the second resistance R2 are connect with the output end of the first chip operational amplifier U1, and described first
The output end of chip operational amplifier U1 is also connect with an input terminal of two-color diode driving circuit.
The two-color diode driving circuit includes the 4th resistance R4, the 5th resistance R5 and the second diode D2, and described the
One end of four resistance R4 is connect with charge power supply, the other end of the 4th resistance R4 and the first indicator light of the second diode D2
Anode connection, the output end of one end of the 5th resistance R5 and operational amplification circuit connects, and the 5th resistance R5's is another
One end is connect with the anode of the second indicator light of the second diode D2, the minus earth of the second diode D2.
First indicator light is green light, and second indicator light is red light.
The utility model has the following beneficial effects: obtaining current sampling circuit lesser by setting operational amplification circuit
Resistance value can reach the conducting depth of control red colored lamp, show to adjust charged state, when the charging of charging load becomes full,
Red colored lamp is gradually switched to extinguish by most bright, thus make two-color diode gradually by it is orange to it is pale yellow again to green instruction.This reality
It is fewer with novel circuit element, to keep the size of wiring board small, cost is reduced, and since sampling resistor is smaller, make it
Power loss is small when standby, to meet the requirement of the stand-by power consumption of U.S. Department of Energy DOE IV and European Union CoC V5.
[Detailed description of the invention]
Fig. 1 is the principles of the present invention block diagram.
Fig. 2 is the circuit diagram of the utility model.
[specific embodiment]
The following example is being explained further and supplementing to the utility model, does not constitute any limit to the utility model
System.
As indicated with 1, the LED state indicating circuit of the charge power supply of the utility model is connected to charge power supply and charging load
Between, wherein charging load is battery.The circuit includes current rectifying and wave filtering circuit 10, current sampling circuit 20, operational amplification circuit
30, two-color diode driving circuit 40 and high frequency transformer T1.
As shown in Figure 1 and Figure 2,10 input terminal of current rectifying and wave filtering circuit is connect with high frequency transformer T1, current rectifying and wave filtering circuit 10
Output end is connect with charging load, the input terminal company of one end of current sampling circuit 20 and charging load and operational amplification circuit 30
It connects, the other end ground connection of current sampling circuit 20, the output end and two-color diode driving circuit 40 1 of operational amplification circuit 30
A input terminal connection, another input terminal of the two-color diode driving circuit 40 are connect with charge power supply, and described double-colored two
The minus earth of second diode D2 of pole pipe driving circuit 40.Specifically, current rectifying and wave filtering circuit 10 includes first diode D1
And first capacitor C1, the voltage of high frequency transformer T1 output is rectified, is filtered.Current sampling circuit 20 includes third electricity
Hinder R3, charging current when acquisition charge power supply charges to charging load.Operational amplification circuit 30 is to current sample electricity
The voltage on road amplifies, to drive the red indicating light of two-color diode comprising the first chip operational amplifier U1, first
Resistance R1 and second resistance R2.Two-color diode driving circuit 40 includes the 4th resistance R4, the 5th resistance R5 and the second diode
D2, the second diode D2 include the first indicator light and the second indicator light, wherein the first indicator light is green light, and the second indicator light is
Red light.The two-color diode driving circuit 40 is used to light the red indicating light and green indicator light of the second diode D2.
As shown in Fig. 2, one end of high frequency transformer T1 is connect with the anode of first diode D1, high frequency transformer T1's is another
One end ground connection, the cathode of first diode D1 are connect with the anode of first capacitor C1 and charging load respectively, first capacitor C1's
Cathode ground connection.One end of 3rd resistor R3 connects with the normal phase input end of charging load and the first chip operational amplifier U1 respectively
It connects, the other end ground connection of 3rd resistor R3, the inverting input terminal of the first chip operational amplifier U1 is respectively with first resistor R1's
One end and the connection of one end of second resistance R2, the other end ground connection of first resistor R1, the other end of second resistance R2 is respectively with the
One end connection of the output end and the 5th resistance R5 of one chip operational amplifier U1, the other end of the 5th resistance R5 and the two or two pole
The red indicating light of pipe D2 connects, and the green indicator light of the second diode D2 is connect with one end of the 4th resistance R4, the two or two pole
The other end of the minus earth of pipe D2, the 4th resistance R4 is connect with charge power supply.
As shown in Figure 1 and Figure 2, the working principle of the circuit are as follows: the secondary of high frequency transformer T1 is whole by first diode D1
After stream and first capacitor C1 filtering, output voltage V0 drives the green indicator light of the second diode D2 to become by the 4th resistance R4
It is bright.When charging, the electric current of load passes through 3rd resistor R3, generates voltage on 3rd resistor R3, the voltage input to first
The non-inverting input terminal of chip operational amplifier U1, since the inverting input terminal of the first chip operational amplifier U1 is separately connected first
Resistance R1 and second resistance R2 makes 3rd resistor R3 can be by the defeated of the first chip operational amplifier U1 in lesser resistance value
Outlet generates voltage and the red indicating light of the second diode D2 is driven to brighten, and when charging current is bigger, the first chip operation is put
The output end voltage of big device U1 is higher, then the electric current for flowing through the 5th resistance R5 is bigger, makes the red indicating light of the second diode D2
Brighter, with the increase in charging time, charging current is gradually become smaller, and the red indicating light of the second diode D2 is gradually dimmed, when
When charging complete, charging current zero, at this point, the output end voltage of the first chip operational amplifier U1 is zero, the second diode
The red indicating light of D2 goes out.And since the resistance value of 3rd resistor R3 is smaller, small power consumption when power standby can meet U.S. Department of Energy
The requirement of the stand-by power consumption of DOE IV and European Union CoC V5.
Although being disclosed by above embodiments to the utility model, the protection scope of the utility model not office
It is limited to this, under conditions of conceiving without departing from the utility model, deformation, the replacement etc. done to above each component will fall into this
In the scope of the claims of utility model.
Claims (6)
1. a kind of LED state indicating circuit of charge power supply, for connecting between charge power supply and charging load, feature exists
In the circuit includes current rectifying and wave filtering circuit (10), current sampling circuit (20), operational amplification circuit (30), two-color diode drive
Dynamic circuit (40) and high frequency transformer T1, the input terminal of the current rectifying and wave filtering circuit (10) are connect with high frequency transformer T1, are rectified
The output end of filter circuit (10) is connect with charging load, one end of the current sampling circuit (20) and charging load and operation
The input terminal of amplifying circuit (30) connects, the other end ground connection of the current sampling circuit (20), the operational amplification circuit
(30) output end is connect with an input terminal of two-color diode driving circuit (40), the two-color diode driving circuit
(40) another input terminal is connect with charge power supply, and the two-color diode cathode of the two-color diode driving circuit (40) connects
Ground.
2. the LED state indicating circuit of charge power supply as described in claim 1, which is characterized in that the current rectifying and wave filtering circuit
It (10) include that first diode D1 and first capacitor C1, the anode of the first diode D1 are connect with high frequency transformer T1, yin
Pole is connect with the anode of first capacitor C1 and charging load respectively, the cathode ground connection of the first capacitor C1.
3. the LED state indicating circuit of charge power supply as described in claim 1, which is characterized in that the current sampling circuit
It (20) is 3rd resistor R3, charging current when acquisition charge power supply charges to charging load.
4. the LED state indicating circuit of charge power supply as described in claim 1, which is characterized in that the operational amplification circuit
It (30) include the first chip operational amplifier U1, first resistor R1 and second resistance R2, the first chip operational amplifier U1
Non-inverting input terminal connect with one end of current sampling circuit (20), the inverting input terminal of the first chip operational amplifier U1
It is connect respectively with one end of one end of first resistor R1 and second resistance R2, the other end ground connection of the first resistor R1 is described
The other end of second resistance R2 is connect with the output end of the first chip operational amplifier U1, the first chip operational amplifier U1
Output end also connect with an input terminal of two-color diode driving circuit (40).
5. the LED state indicating circuit of charge power supply as described in claim 1, which is characterized in that the two-color diode drives
Dynamic circuit (40) include the 4th resistance R4, the 5th resistance R5 and the second diode D2, one end of the 4th resistance R4 and charging
Power supply connection, the other end of the 4th resistance R4 are connect with the anode of the first indicator light of the second diode D2, and the described 5th
One end of resistance R5 is connect with the output end of operational amplification circuit (30), the other end and the second diode of the 5th resistance R5
The anode of the second indicator light of D2 connects, the minus earth of the second diode D2.
6. the LED state indicating circuit of charge power supply as claimed in claim 5, which is characterized in that first indicator light is
Green light, second indicator light are red light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821920438.1U CN208971215U (en) | 2018-11-20 | 2018-11-20 | The LED state indicating circuit of charge power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821920438.1U CN208971215U (en) | 2018-11-20 | 2018-11-20 | The LED state indicating circuit of charge power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971215U true CN208971215U (en) | 2019-06-11 |
Family
ID=66765629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821920438.1U Expired - Fee Related CN208971215U (en) | 2018-11-20 | 2018-11-20 | The LED state indicating circuit of charge power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208971215U (en) |
-
2018
- 2018-11-20 CN CN201821920438.1U patent/CN208971215U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190611 Termination date: 20211120 |