CN217282331U - Double-independent charging circuit - Google Patents
Double-independent charging circuit Download PDFInfo
- Publication number
- CN217282331U CN217282331U CN202220444729.8U CN202220444729U CN217282331U CN 217282331 U CN217282331 U CN 217282331U CN 202220444729 U CN202220444729 U CN 202220444729U CN 217282331 U CN217282331 U CN 217282331U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- resistor
- input
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a double independent charging circuit, which comprises an input circuit, a first charging circuit and a second charging circuit; the first charging circuit comprises a first flyback conversion circuit connected with the input circuit, a first output interface connected with the first flyback conversion circuit, and a PD charging control circuit connected with the first flyback conversion circuit and the first output interface; the second charging circuit comprises a second flyback conversion circuit connected with the input circuit, a second output interface connected with the second flyback conversion circuit, and an MCU charging control circuit connected with the second flyback conversion circuit and the second output interface. The utility model discloses can realize that first charging circuit and second charging circuit's output keeps apart to avoid first charging circuit and second charging circuit mutual interference.
Description
Technical Field
The utility model relates to a charger field especially indicates a two independent charging circuit.
Background
The existing charger generally has a single output to charge an electronic product (such as a smart phone) or a battery, and in order to facilitate charging of people, part of the charger is configured to have a dual output so that people can simultaneously charge the electronic product and the battery, but the electronic product and the battery can interfere with each other when being charged simultaneously, thereby affecting the charging effect of the electronic product.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two independent charging circuit to overcome not enough among the prior art.
In order to achieve the above purpose, the solution of the present invention is:
a dual independent charging circuit includes an input circuit, a first charging circuit and a second charging circuit; the input circuit is used for accessing an external alternating current power supply and converting external alternating current into input direct current; the first charging circuit is used for accessing the output direct current output by the output circuit and converting the output direct current into first output direct current, and comprises a first flyback conversion circuit connected with the input circuit, a first output interface connected with the first flyback conversion circuit and a PD charging control circuit connected with the first flyback conversion circuit and the first output interface; the second charging circuit is used for accessing the output direct current output by the output circuit and converting the output direct current into second output direct current, and comprises a second flyback conversion circuit connected with the input circuit, a second output interface connected with the second flyback conversion circuit and an MCU charging control circuit connected with the second flyback conversion circuit and the second output interface.
The input circuit comprises a first bridge rectifier stack and a second bridge rectifier stack which are connected in parallel.
The MCU charging control circuit comprises a direct current voltage reduction circuit, an output current regulating circuit, an output switch circuit, a battery temperature acquisition circuit, a battery voltage acquisition circuit and an MCU processor; the input end of the direct current voltage reduction circuit is connected with the output end of the second flyback conversion circuit, and the output end of the direct current voltage reduction circuit is connected with the second output interface through the output switch circuit; the MCU processor is connected with the direct current voltage reduction circuit through the output current regulating circuit, connected with the output switch circuit and used for controlling the on-off of the output switch circuit, and connected with the second output interface through the battery temperature acquisition circuit and the battery voltage acquisition circuit.
The MCU charging control circuit further comprises a circuit temperature acquisition circuit connected with the MCU processor.
The circuit temperature acquisition circuit comprises a thermistor.
The MCU charging control circuit further comprises a state indicating circuit connected with the MCU processor.
The output current regulating circuit comprises an operational amplifier, a feedback resistor, a positive end resistor, a negative end input resistor, a first negative end regulating resistor, a second negative end regulating resistor, a third negative end regulating resistor, a feedback capacitor, a first regulating triode and a second regulating triode; the in-phase input end of the operational amplifier is connected with the first end of the positive end resistor, the second end of the positive end resistor is connected with the first ground end, the inverting input end of the operational amplifier is connected with the first end of the feedback resistor and the first end of the negative end resistor, the second end of the negative end resistor is connected with the first end of the negative end input resistor, the first end of the first negative end adjusting resistor, the first end of the second negative end adjusting resistor and the first end of the third negative end adjusting resistor, the second end of the feedback resistor is connected with the first end of the feedback capacitor, the second end of the feedback capacitor is connected with the output end of the operational amplifier, the second end of the negative end input resistor is connected with the control power supply, the second end of the first negative end adjusting resistor is connected with the second ground end, the second end of the second negative end adjusting resistor is grounded through the first adjusting triode, the second end of the third negative end adjusting resistor is grounded through the second adjusting triode, the bases of the first adjusting triode and the second adjusting triode are connected with the MCU processor, the output end of the operational amplifier is connected with the direct current voltage reduction circuit through an output diode; the first ground terminal is connected with the second ground terminal through a connecting capacitor.
The direct current voltage reduction circuit comprises a direct current voltage reduction chip, a first input resistor, a second input resistor, a third input resistor, a first input capacitor, a second input capacitor, an output inductor, a first output resistor, a second output resistor, a third output resistor, a first output capacitor, a second output capacitor and a third output capacitor; the VIN pin of the DC step-down chip is connected with the first end of the first input resistor, the second end of the second input resistor, the first end of the third input resistor, the first end of the first input capacitor and the anode of the second input capacitor and used as the input end of the DC step-down circuit, the input end of the DC step-down circuit is connected with the output end of the second flyback conversion circuit, the PG pin of the DC step-down chip is connected with the second end of the second input resistor, the PGND pin and the SGND pin of the DC step-down chip and the second end of the first input resistor, the second end of the first input capacitor and the cathode of the second input capacitor are connected with the second ground end, the EN pin of the DC step-down chip is connected with the second end of the third input resistor, the LX pin of the DC step-down chip is connected with the first end of the output inductor and the first end of the first output capacitor, the second end of the first output capacitor is connected with the second ground end through the third output resistor, the second end of the output inductor is connected with the first end of the first output resistor, the second end of the second output resistor, The first end of the second output capacitor and the first end of the third output capacitor are used as the output end of the direct current voltage reduction circuit, the output end of the direct current voltage reduction circuit is connected with the second output interface through the output switch circuit, the FB pin of the direct current voltage reduction chip is connected with the second end of the first output resistor, the first end of the second output resistor and the second end of the second output capacitor, and the second end of the second output capacitor and the second end of the second output resistor are connected with the second ground end; the output end of the operational amplifier of the output current regulating circuit is connected with the FB pin of the DC step-down chip of the DC step-down circuit through an output diode.
The second charging circuit further comprises a control power supply circuit; the control power supply circuit comprises a voltage stabilizing chip, a VIN pin of the voltage stabilizing chip is connected with the anode of the second output interface through a first input diode, the VIN pin of the voltage stabilizing chip is also connected with the output end of the second flyback conversion circuit through a second input diode and an input inductor, and a VOUT pin of the voltage stabilizing chip is used for outputting a control power supply.
The second charging circuit further comprises an optical coupler acquisition circuit; and the input side of the optical coupling acquisition circuit is connected with the first output interface, and the output side of the optical coupling acquisition circuit is connected with the base of a second regulating triode Q402.
After the technical scheme is adopted, the utility model discloses a first charging circuit's first flyback converter circuit and second charging circuit's second flyback converter circuit can realize output isolation each other through respective flyback transformer for first charging circuit and second charging circuit can independently export, and then make and be used for not receiving the influence that is used for the second charging circuit who charges for the battery for the first charging circuit that the electronic product charges, guarantee the charging effect of electronic product.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a schematic circuit diagram of an input circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a first charging circuit of the present invention;
fig. 4 is a schematic circuit diagram of a second flyback converter circuit of the second charging circuit of the present invention;
fig. 5 is the utility model discloses a second charging circuit's second output interface, MCU charge control circuit, control power supply circuit and opto-coupler acquisition circuit's circuit schematic diagram.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
As shown in fig. 1 to 5, the present invention discloses a dual independent charging circuit, which includes an input circuit, a first charging circuit for charging an electronic product, and a second charging circuit for charging a battery; the input circuit is used for accessing an external alternating current power supply and converting external alternating current into input direct current; the first charging circuit is used for accessing the output direct current output by the output circuit and converting the output direct current into first output direct current to charge the electronic product, and comprises a first flyback conversion circuit connected with the input circuit, a first output interface connected with the first flyback conversion circuit and a PD charging control circuit connected with the first flyback conversion circuit and the first output interface; the second charging circuit is used for accessing the output direct current output by the output circuit and converting the output direct current into second output direct current to charge the battery, and comprises a second flyback conversion circuit connected with the input circuit, a second output interface connected with the second flyback conversion circuit and an MCU charging control circuit connected with the second flyback conversion circuit and the second output interface.
The utility model discloses in, the first flyback converter circuit of first charging circuit and the second flyback converter circuit's of second flyback converter circuit can realize output isolation each other through respective flyback transformer for first charging circuit and second charging circuit can independently export, and then make and be used for not receiving the influence that is used for the second charging circuit who charges for the battery for the first charging circuit that the electronic product charges, guarantee the charging effect of electronic product.
The utility model discloses in, input circuit can be including parallelly connected first rectifier bridge heap BD101 and second rectifier bridge heap BD102, and first rectifier bridge heap BD101 and second rectifier bridge heap BD102 all have the rectification effect, and first rectifier bridge heap BD101 and second rectifier bridge heap BD102 parallelly connected use can effectively reduce the input the utility model discloses a two independent charging circuit's temperature rise. Input circuit still include with first rectifier bridge heap BD101 and second rectifier bridge heap BD 102's first input filter circuit and second input filter circuit, first input filter circuit and second input filter circuit can guarantee the utility model discloses two independent charging circuit have good EMI performance.
The utility model discloses in, first charging circuit's PD charge control circuit can make first charging circuit support the PD protocol of filling soon for first charging circuit can carry out quick charge to the electronic product that supports the PD protocol of filling soon, guarantees the speed of charging. The pin that is used for inserting the detected signal among this PD charging control circuit's PD protocol chip IC201 (like the CC1 foot of PD protocol chip IC 201) can make through TVS pipe ground connection the utility model discloses two independent charging circuit have good ESD performance, and electronic WT6635P can be explained to PD protocol chip IC201 adoption Wei, and the first flyback converting circuit of first charging circuit can adopt the PWM chip IC101 that Power integration company's model is INN3367C to carry out on-off control, and first output interface can adopt type-c interface; the second flyback converter of the second charging circuit may be switched by a PWM chip IC1 of Power Integrations, inc, model INN 3165C.
In the utility model, the MCU charging control circuit of the second charging circuit comprises a dc voltage reduction circuit, an output current regulating circuit, an output switch circuit, a battery temperature acquisition circuit, a battery voltage acquisition circuit and an MCU processor IC 601; the input end of the direct current voltage reduction circuit is connected with the output end of the second flyback conversion circuit to reduce the output voltage of the second flyback conversion circuit, the output end of the direct current voltage reduction circuit is connected with the second output interface through the output switch circuit, and the output switch circuit controls the on-off of the direct current voltage reduction circuit and the second output interface to control whether the second output interface outputs the voltage to the outside; the MCU processor IC601 is connected with the direct current voltage reduction circuit through an output current adjusting circuit, the output current adjusting circuit is used for adjusting the output current of the direct current voltage reduction circuit and adjusting the output current of the second output interface, the MCU processor IC601 is connected with the output switch circuit and controls the on-off of the output switch circuit to control whether the second output interface outputs externally, the MCU processor IC601 is connected with the second output interface through a battery temperature acquisition circuit and a battery voltage acquisition circuit, the battery temperature acquisition circuit is connected with a thermistor in the battery through the second output interface to acquire the temperature of the battery, the battery voltage acquisition circuit is connected with the positive electrode of the battery through the second output interface to acquire the voltage of the battery, and the MCU processor IC601 can adopt EM88F NASO16UJ of Yilong electrons. The working principle of the MCU charging control circuit is as follows: the MCU processor IC601 acquires the temperature and the voltage of the battery through the battery temperature acquisition circuit and the battery voltage acquisition circuit and controls the output current regulation circuit and the output switch circuit according to the acquired temperature and voltage information of the battery, so that the second charging circuit can output different currents to the battery according to different states of the battery, and the charging effect of the battery is ensured; in addition, the second charging circuit can stop charging the battery by turning off the output switch circuit when the output overvoltage is output (namely, when the voltage of the battery is overhigh), so that the output overvoltage protection is realized, and the battery is prevented from being damaged.
In the present invention, the output current adjusting circuit of the MCU charging control circuit comprises an operational amplifier IC401, a feedback resistor R401, a positive terminal resistor R403, a negative terminal resistor R404, a negative terminal input resistor R405, a first negative terminal adjusting resistor R407, a second negative terminal adjusting resistor R409, a third negative terminal adjusting resistor R410, a feedback capacitor C401, a first adjusting triode Q401 and a second adjusting triode Q402, wherein the non-inverting input terminal of the operational amplifier IC401 is connected to the first terminal of the positive terminal resistor R403, the second terminal of the positive terminal resistor R403 is connected to the first ground, the inverting input terminal of the operational amplifier IC401 is connected to the first terminal of the feedback resistor R401 and the first terminal of the negative terminal resistor R404, the second terminal of the negative terminal resistor R404 is connected to the first terminal of the negative terminal input resistor R405, the first terminal of the first negative terminal adjusting resistor R407, the first terminal of the second negative terminal adjusting resistor R409 and the first terminal of the third negative terminal adjusting resistor R410, the second terminal of the feedback resistor R401 is connected to the second terminal of the feedback capacitor C401, the second end of the feedback capacitor C401 is connected with the output end of the operational amplifier IC401, the second end of the negative terminal input resistor R405 is connected with a control power supply VREF, the second end of the first negative terminal adjusting resistor R407 is connected with a second ground end, the second end of the second negative terminal adjusting resistor R409 is grounded through a first adjusting triode Q401, the second end of the third negative terminal adjusting resistor R410 is grounded through a second adjusting triode Q402, the bases of the first adjusting triode Q401 and the second adjusting triode Q402 are connected with the MCU processor IC601, and the output end of the operational amplifier IC401 is connected with a direct current voltage reduction circuit through an output diode D302; the first ground is connected to the second ground through a connecting capacitor CY 2. The working principle of the output current regulating circuit is as follows: the MCU processor IC601 controls whether the second negative terminal adjusting resistor R409 and the third negative terminal adjusting resistor R410 are connected in parallel with the first negative terminal adjusting resistor R407 by controlling the on/off of the first adjusting transistor Q401 and the second adjusting transistor Q402, so as to control the voltage at the inverting input terminal of the operational amplifier IC401, and according to the circuit principles of "virtual short" and "virtual break", the output current of the output current adjusting circuit can be adjusted and stabilized by controlling the voltage at the inverting input terminal of the operational amplifier IC401, so as to adjust the output current of the dc voltage reduction circuit.
In the present invention, the dc voltage-reducing circuit may include a dc voltage-reducing chip IC301, a first input resistor R301, a second input resistor R302, a third input resistor R303, a first input capacitor C301, a second input capacitor EC301, an output inductor L301, a first output resistor R304, a second output resistor R306, a third output resistor R307, a first output capacitor C303, a second output capacitor C304, and a third output capacitor C305; the dc step-down chip IC301 may adopt DIO6083CN8 of the tiol microelectronics, where a VIN pin of the dc step-down chip IC301 is connected to a first end of a first input resistor R301, a second end of a second input resistor R302, a first end of a third input resistor R303, a first end of a first input capacitor C301 and an anode of a second input capacitor EC301 and serves as an input end of the dc step-down circuit, an input end of the dc step-down circuit is connected to an output end of a second flyback converter circuit, a PG pin of the dc step-down chip IC301 is connected to a second end of the second input resistor R302, a PGND pin and an SGND pin of the dc step-down chip IC301, a second end of the first input resistor R301, a second end of the first input capacitor C301 and a cathode of the second input capacitor EC301 are connected to a second ground, a LX pin of the dc step-down chip IC301 is connected to a second end of the third input resistor R303, an LX pin of the dc step-down chip IC301 is connected to a first end of an output inductor L301 and a first end of the first output capacitor C303, a second end of the first output capacitor C303 is connected to a second ground end through a third output resistor R307, a second end of the output inductor L301 is connected to a first end of the first output resistor R304, a first end of the second output capacitor C304 and a first end of the third output capacitor C305 and serves as an output end of the dc voltage reduction circuit, an output end of the dc voltage reduction circuit is connected to the second output interface through an output switch circuit, a FB pin of the dc voltage reduction chip IC301 is connected to a second end of the first output resistor R304, a first end of the second output resistor R306 and a second end of the second output capacitor C304, and a second end of the second output capacitor C304 and a second end of the second output resistor R306 are connected to the second ground end; the output end of the operational amplifier IC401 of the output current regulating circuit is connected with the FB pin of the DC buck chip IC301 of the DC buck circuit through an output diode D302 so as to regulate the output current of the DC buck circuit.
The utility model discloses in, MCU charge control circuit still includes the circuit temperature acquisition circuit who is connected with MCU treater IC601, and MCU treater IC601 can acquire through circuit temperature acquisition circuit like this the utility model discloses a two independent charging circuit's temperature the utility model discloses a can turn off output switch circuit and stop charging for the battery when two independent charging circuit high temperatures, realize the input overtemperature protection, guarantee the utility model discloses a two independent charging circuit and battery can not damage. The circuit temperature acquisition circuit can include thermistor NTC, the utility model discloses a thermistor NTC's voltage variation acquires the utility model discloses a two independent charging circuit's temperature realizes with low costs.
In the utility model, the MCU charging control circuit further comprises a state indicating circuit connected with the MCU processor IC601, and the MCU processor IC601 prompts the user through the state indicating circuit, thereby the state of the double independent charging circuits and the battery of the utility model is improved; this status indication circuit can include pilot lamp LED601, the utility model discloses a user is reminded to the different lighting effect of pilot lamp LED601, realizes with low costs.
In the present invention, the second charging circuit may further include a control power supply circuit; the control power supply circuit comprises a voltage stabilizing chip IC501, a VIN pin of the voltage stabilizing chip IC501 is connected with the anode of the second output interface through a first input diode D501, the VIN pin of the voltage stabilizing chip IC501 is also connected with the output end of the second flyback conversion circuit through a second input diode D502 and an input inductor L501, and a VOUT pin of the voltage stabilizing chip IC501 is used for outputting a control power VREF; when the second charging circuit just starts to be electrified, the voltage stabilizing chip IC501 is connected to the output voltage of the second flyback conversion circuit to output a control power VREF; when the second charging circuit works stably, the voltage stabilizing chip IC501 is connected to the output voltage of the second charging circuit to output a more stable control power source VREF.
In the present invention, the second charging circuit may further include an optical coupler acquisition circuit; the input side of the optical coupling acquisition circuit is connected with the first output interface, and the output side of the optical coupling acquisition circuit is connected with the base of a second regulating triode Q402; the optical coupling acquisition circuit has an isolation function and can avoid the mutual influence of the first charging circuit and the second charging circuit; and when first charging circuit and second charging circuit charge for electronic product and battery respectively, the input side of opto-coupler acquisition circuit can switch on luminous and make opto-coupler acquisition circuit's output side control second adjust triode Q402 and switch on, and then makes second charging circuit reduce output current size, thereby reduce the utility model discloses a two independent charging circuit's temperature rise.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (10)
1. A dual independent charging circuit, comprising: the charging circuit comprises an input circuit, a first charging circuit and a second charging circuit;
the input circuit is used for accessing an external alternating current power supply and converting external alternating current into input direct current;
the first charging circuit is used for accessing the output direct current output by the output circuit and converting the output direct current into first output direct current, and comprises a first flyback conversion circuit connected with the input circuit, a first output interface connected with the first flyback conversion circuit and a PD charging control circuit connected with the first flyback conversion circuit and the first output interface;
the second charging circuit is used for accessing the output direct current output by the output circuit and converting the output direct current into second output direct current, and comprises a second flyback conversion circuit connected with the input circuit, a second output interface connected with the second flyback conversion circuit and an MCU charging control circuit connected with the second flyback conversion circuit and the second output interface.
2. A dual independent charging circuit as claimed in claim 1, wherein: the input circuit comprises a first bridge rectifier stack and a second bridge rectifier stack connected in parallel.
3. A dual independent charging circuit as claimed in claim 1, wherein: the MCU charging control circuit comprises a direct current voltage reduction circuit, an output current regulating circuit, an output switch circuit, a battery temperature acquisition circuit, a battery voltage acquisition circuit and an MCU processor;
the input end of the direct current voltage reduction circuit is connected with the output end of the second flyback conversion circuit, and the output end of the direct current voltage reduction circuit is connected with the second output interface through the output switch circuit; the MCU processor is connected with the direct current voltage reduction circuit through the output current regulating circuit, connected with the output switch circuit and used for controlling the on-off of the output switch circuit, and connected with the second output interface through the battery temperature acquisition circuit and the battery voltage acquisition circuit.
4. A dual independent charging circuit as claimed in claim 3, wherein: the MCU charging control circuit further comprises a circuit temperature acquisition circuit connected with the MCU processor.
5. A dual independent charging circuit as claimed in claim 4, wherein: the circuit temperature acquisition circuit comprises a thermistor.
6. A dual independent charging circuit as claimed in claim 3, wherein: the MCU charging control circuit further comprises a state indicating circuit connected with the MCU processor.
7. A dual independent charging circuit as claimed in claim 3, wherein: the output current regulating circuit comprises an operational amplifier, a feedback resistor, a positive end resistor, a negative end input resistor, a first negative end regulating resistor, a second negative end regulating resistor, a third negative end regulating resistor, a feedback capacitor, a first regulating triode and a second regulating triode; the in-phase input end of the operational amplifier is connected with the first end of the positive end resistor, the second end of the positive end resistor is connected with the first ground end, the reverse phase input end of the operational amplifier is connected with the first end of the feedback resistor and the first end of the negative end resistor, the second end of the negative end resistor is connected with the first end of the negative end input resistor, the first end of the first negative end adjusting resistor, the first end of the second negative end adjusting resistor and the first end of the third negative end adjusting resistor, the second end of the feedback resistor is connected with the first end of the feedback capacitor, the second end of the feedback capacitor is connected with the output end of the operational amplifier, the second end of the negative end input resistor is connected with the control power supply, the second end of the first negative end adjusting resistor is connected with the second ground end, the second end of the second negative end adjusting resistor is grounded through the first adjusting triode, the second end of the third negative end adjusting resistor is grounded through the second adjusting triode, the bases of the first adjusting triode and the second adjusting triode are connected with the MCU processor, the output end of the operational amplifier is connected with the direct current voltage reduction circuit through an output diode;
the first ground terminal is connected with the second ground terminal through a connecting capacitor.
8. A dual independent charging circuit as claimed in claim 7, wherein: the direct current voltage reduction circuit comprises a direct current voltage reduction chip, a first input resistor, a second input resistor, a third input resistor, a first input capacitor, a second input capacitor, an output inductor, a first output resistor, a second output resistor, a third output resistor, a first output capacitor, a second output capacitor and a third output capacitor; the VIN pin of the DC step-down chip is connected with the first end of the first input resistor, the second end of the second input resistor, the first end of the third input resistor, the first end of the first input capacitor and the anode of the second input capacitor and used as the input end of the DC step-down circuit, the input end of the DC step-down circuit is connected with the output end of the second flyback conversion circuit, the PG pin of the DC step-down chip is connected with the second end of the second input resistor, the PGND pin and the SGND pin of the DC step-down chip and the second end of the first input resistor, the second end of the first input capacitor and the cathode of the second input capacitor are connected with the second ground end, the EN pin of the DC step-down chip is connected with the second end of the third input resistor, the LX pin of the DC step-down chip is connected with the first end of the output inductor and the first end of the first output capacitor, the second end of the first output capacitor is connected with the second ground end through the third output resistor, the second end of the output inductor is connected with the first end of the first output resistor, the second end of the second output resistor, The first end of the second output capacitor and the first end of the third output capacitor are used as the output end of the direct current voltage reduction circuit, the output end of the direct current voltage reduction circuit is connected with the second output interface through the output switch circuit, the FB pin of the direct current voltage reduction chip is connected with the second end of the first output resistor, the first end of the second output resistor and the second end of the second output capacitor, and the second end of the second output capacitor and the second end of the second output resistor are connected with the second ground end;
the output end of the operational amplifier of the output current regulating circuit is connected with the FB pin of the DC step-down chip of the DC step-down circuit through an output diode.
9. A dual independent charging circuit as claimed in claim 4, wherein: the second charging circuit further comprises a control power supply circuit; the control power supply circuit comprises a voltage stabilizing chip, a VIN pin of the voltage stabilizing chip is connected with the anode of the second output interface through a first input diode, the VIN pin of the voltage stabilizing chip is also connected with the output end of the second flyback conversion circuit through a second input diode and an input inductor, and a VOUT pin of the voltage stabilizing chip is used for outputting a control power supply.
10. A dual independent charging circuit as claimed in claim 4, wherein: the second charging circuit further comprises an optical coupler acquisition circuit; and the input side of the optical coupling acquisition circuit is connected with the first output interface, and the output side of the optical coupling acquisition circuit is connected with the base of a second regulating triode Q402.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220444729.8U CN217282331U (en) | 2022-03-03 | 2022-03-03 | Double-independent charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220444729.8U CN217282331U (en) | 2022-03-03 | 2022-03-03 | Double-independent charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217282331U true CN217282331U (en) | 2022-08-23 |
Family
ID=82858520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220444729.8U Active CN217282331U (en) | 2022-03-03 | 2022-03-03 | Double-independent charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217282331U (en) |
-
2022
- 2022-03-03 CN CN202220444729.8U patent/CN217282331U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017133400A2 (en) | Adapter and charging control method | |
| JP6966518B2 (en) | Adapter and charge control method | |
| CN202333882U (en) | Direct-current power supply having redundant backup function | |
| CN102263515A (en) | AC-DC (alternating current-direct current) power conversion chip and power conversion circuit | |
| CN110995025A (en) | Switching power supply circuit | |
| TW200532965A (en) | Power management for battery powered appliances | |
| CN108964450B (en) | Composite circuit for connecting DC power supply to AC power supply | |
| CN100401616C (en) | Plower supply managing circuit for battery power supply device | |
| CN217282331U (en) | Double-independent charging circuit | |
| CN210669601U (en) | Battery charging circuit | |
| CN105207347A (en) | Multi-output power supply supplying power uninterruptedly | |
| CN210821900U (en) | Integrated control charging circuit and device for unmanned aerial vehicle | |
| CN112737291A (en) | AC-DC compatible input power supply high-voltage generator device | |
| CN202178715U (en) | AC-DC power conversion chip and power conversion circuit | |
| CN217183010U (en) | Power supply circuit and power adapter | |
| CN104426220A (en) | Voltage regulation circuit | |
| CN207475266U (en) | A kind of LED emergency lights constant-power charging circuit | |
| TWI773392B (en) | Charging control method and charging system capable of tracking maximum efficiency | |
| CN214412379U (en) | Wide-range voltage-adjustable current-adjustable power supply charging device | |
| CN211266788U (en) | Switching power supply circuit | |
| CN217469482U (en) | Multi-gear constant-current automatic charging circuit | |
| CN210949200U (en) | Fan suitable for ultra-wide voltage range | |
| CN209881443U (en) | Solar charging circuit and charger | |
| WO2022127413A1 (en) | Charging circuit, power adapter and charging system | |
| CN216531069U (en) | Current equalizing circuit and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |