CN213693207U - Switch-type peripheral charging circuit and charging system - Google Patents
Switch-type peripheral charging circuit and charging system Download PDFInfo
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- CN213693207U CN213693207U CN202023022923.7U CN202023022923U CN213693207U CN 213693207 U CN213693207 U CN 213693207U CN 202023022923 U CN202023022923 U CN 202023022923U CN 213693207 U CN213693207 U CN 213693207U
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Abstract
The utility model discloses a switch type peripheral hardware charging circuit and charging system. The switch type peripheral charging circuit comprises a switch type charging chip; the input end of the switch type charging chip is connected with the direct current power supply, the output end of the switch type charging chip is connected with the battery to be charged, the switch type charging chip is used for conducting constant current charging on the battery to be charged when the voltage of the battery to be charged is smaller than the constant voltage threshold voltage of the switch type charging chip, and conducting constant voltage charging on the battery to be charged when the voltage of the battery to be charged is larger than or equal to the constant voltage threshold voltage of the switch type charging chip. The utility model discloses an adopt switch type charging chip to treat rechargeable battery and charge, can effectively reduce the heat loss of charging, can improve rechargeable battery's charge efficiency effectively. In addition, the phenomenon of overcharging of the battery to be charged due to over-full power storage can be avoided, and therefore the use loss of the battery to be charged is reduced.
Description
Technical Field
The embodiment of the utility model provides a relate to circuit design technical field, especially relate to a switch type peripheral hardware charging circuit and charging system.
Background
Along with the demand of market wireless portable products is stronger and stronger, the kind of wireless portable products is more and more abundant, and the user is more and more to the use of wireless portable products. Because the user goes out and is not convenient for hand-carry power generation source, so wireless portable product is inconvenient to design the using mode of wire rod connection power supply, and then most wireless portable product designs into the design mode that has rechargeable battery to carry out independent power supply, leads to wireless portable product to the charge efficiency demand of large capacity rechargeable battery more and more high.
At present, a charging chip of a linear low dropout regulator (LDO) adopted by circuit designers is used for charging a battery, although the circuit is simple and has low cost, most of the voltage in the charging chip is converted into heat, so that the charging efficiency of the rechargeable battery is reduced, the rechargeable battery is seriously heated, and the service life of the rechargeable battery is lost. In addition, in order to solve the problem that the charging chip of the linear low dropout regulator used for charging the battery generates serious heat, the circuit designer uses the charging current to charge the battery, which can also result in overlong charging time of the rechargeable battery, and the charging efficiency is not effectively improved, and the use requirement of the user on the wireless portable product cannot be well met.
SUMMERY OF THE UTILITY MODEL
The utility model provides a switch type peripheral hardware charging circuit and charging system for the charge time who solves rechargeable battery is long, charges and generates heat serious problem, realizes high charge efficiency, the low loss that generates heat.
In a first aspect, an embodiment of the present invention provides a switch-type peripheral charging circuit, including a switch-type charging chip;
the input end of the switch type charging chip is connected with the direct current power supply, the output end of the switch type charging chip is connected with the battery to be charged, the switch type charging chip is used for conducting constant current charging on the battery to be charged when the voltage of the battery to be charged is smaller than the constant voltage threshold voltage of the switch type charging chip, and conducting constant voltage charging on the battery to be charged when the voltage of the battery to be charged is larger than or equal to the constant voltage threshold voltage of the switch type charging chip.
Optionally, the model of the switching type charging chip includes ETA 6003.
Optionally, the switch-type peripheral charging circuit further includes a voltage-reducing module, a first end of the voltage-reducing module is connected to a switching adjustment input end of the switch-type charging chip, a second end of the voltage-reducing module is connected to a switching adjustment output end of the switch-type charging chip, and the voltage-reducing module is configured to reduce an input voltage of the dc power supply.
Optionally, the voltage-reducing module includes an inductor, a first end of the inductor is used as a first end of the voltage-reducing module, and a second end of the inductor is used as a second end of the voltage-reducing module.
Optionally, the switch-type peripheral charging circuit further includes a filtering module, a first end of the filtering module is connected to the dc power supply and an input end of the switch-type charging chip, a second end of the filtering module is grounded, and the filtering module is configured to filter a dc voltage output by the dc power supply.
Optionally, the filtering module includes a first capacitor, a first pole of the first capacitor is used as a first end of the filtering module, and a second pole of the first capacitor is used as a second end of the filtering module.
Optionally, the switch-type peripheral charging circuit further includes a second capacitor, a first pole of the second capacitor is connected to the output terminal of the switch-type charging chip, and a second pole of the second capacitor is grounded.
Optionally, the switch-type peripheral charging circuit further includes a current adjusting module, a first end of the current adjusting module is connected to a current input end of the switch-type charging chip, and a second end of the current adjusting module is grounded.
Optionally, the current regulation module includes a first resistor, a first end of the first resistor serves as a first end of the current regulation module, and a second end of the first resistor serves as a second end of the current regulation module.
In a second aspect, an embodiment of the present invention further provides a charging system, including a switch-type peripheral charging circuit and a battery, which are implemented as any one of the first aspect; the switch type peripheral charging circuit is connected with the battery and used for charging the battery.
The utility model discloses technical scheme is connected with DC power supply through switch type charging chip's input, and DC power supply exports the direct current for switch type charging chip, and switch type charging chip can step up or step down the direct current voltage of DC power supply output according to rechargeable battery's demand. The output end of the switch type charging chip is connected with the battery to be charged, the switch type charging chip changes the voltage and the current output to the battery to be charged according to the direct-current voltage output by the direct-current power supply according to the requirement of the battery to be charged, and outputs the changed voltage and current to the battery to be charged for charging and energy storage. In addition, when the voltage of the battery to be charged is lower than the constant voltage threshold voltage of the switch type charging chip, the switch type charging chip performs constant current charging on the battery to be charged, and at the moment, the battery to be charged can be charged and stored with large constant current which can be borne by the battery to be charged, so that the charging efficiency of the battery to be charged can be improved. When the voltage of the battery to be charged is greater than or equal to the constant voltage threshold voltage of the switch type charging chip, the battery to be charged is subjected to constant voltage charging, the charging current is gradually reduced, the battery to be charged is stopped from being charged and stored energy until the charging current is reduced to 10% of the constant current charging current, and at the moment, the battery to be charged is charged and stored energy is finished. The constant voltage charging is carried out on the battery to be charged, so that the phenomenon of overcharging of the battery to be charged can not occur under the condition that the electric power storage ratio is full, the charging efficiency of the battery to be charged can be effectively improved, and the loss of the battery to be charged is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a switch-type peripheral charging system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the utility model provides a switch type peripheral hardware charging system's schematic structure diagram, figure 1 is the embodiment of the utility model provides a switch type peripheral hardware charging system's that provides a schematic structure diagram. As shown in fig. 1, the switch-type peripheral charging circuit includes a switch-type charging chip 120; the input end of the switch type charging chip 120 is connected to the dc power supply 110, the output end of the switch type charging chip 120 is connected to the battery 130 to be charged, and the switch type charging chip 120 is configured to perform constant current charging on the battery 130 to be charged when the voltage of the battery 130 to be charged is less than the constant voltage threshold voltage of the switch type charging chip 120, and perform constant voltage charging on the battery 130 to be charged when the voltage of the battery 130 to be charged is greater than or equal to the constant voltage threshold voltage of the switch type charging chip 120.
The switch-type charging chip 120 converts direct current into high-frequency pulses for charging, stores electric energy in the inductor and the capacitor, and releases the electric energy according to a predetermined requirement by using the characteristics of the inductor and the capacitor, so that the heat energy loss can be effectively reduced, and the charging efficiency can be improved. For example, the switch-type charging chip 120 may change the output voltage or current according to a predetermined requirement. The input end of the switch type charging chip 120 is connected to the dc power supply 110, the dc power supply 110 outputs dc power to the switch type charging chip 120, and the switch type charging chip 120 can boost or buck the dc voltage output by the dc power supply 110 according to the requirement of the rechargeable battery. The output end of the switch type charging chip 120 is connected to the battery 130 to be charged, and the switch type charging chip 120 changes the voltage and current output to the battery 130 to be charged according to the dc voltage output by the dc power supply 110 and the requirement of the battery 130 to be charged, and outputs the changed voltage and current to the battery 130 to be charged for charging and energy storage. The operation process of the switching type charging chip 120 is as follows: when the voltage of the to-be-charged battery 130 is lower than the constant voltage threshold voltage of the switch-type charging chip 120, the switch-type charging chip 120 performs constant current charging on the to-be-charged battery 130, and at this time, the to-be-charged battery 130 can be charged and stored with a large constant current which can be borne by the to-be-charged battery 130, so that the charging efficiency of the to-be-charged battery 130 can be improved, and meanwhile, the heating loss can be reduced, thereby reducing the heating of the switch-type peripheral charging circuit. When the voltage of the battery 130 to be charged is greater than or equal to the constant voltage threshold voltage of the switch-type charging chip 120, the battery 130 to be charged is charged with a constant voltage, the charging current is gradually reduced, until the charging current is reduced to 10% of the constant current charging current, the charging and energy storage of the battery 130 to be charged are stopped, and at this moment, the charging and energy storage of the battery 130 to be charged are completed. The constant voltage charging is performed on the battery 130 to be charged, so that the phenomenon of overcharge of the battery 130 to be charged under the condition of full power storage can be avoided, the charging efficiency of the battery 130 to be charged can be effectively improved, and the loss of the battery 130 to be charged can be reduced.
For example, the prior art employs a linear LDO charging chip, in which the voltage difference becomes heat, the charging efficiency is low, and the heat generation is serious. When a 5V direct current power supply charges a 3.7V lithium battery at 800mA current, the charging efficiency of the linear LDO charging chip is less than 74%, and 26% of electric energy is converted into heat. However, the use of the switch-type charging chip greatly reduces the heat generated during charging. When the ambient temperature is 25 ℃, the constant current charging is carried out for 10 minutes under the current of 1A, and the temperature of the switch type charging chip is tested to be 38 ℃. The thermal resistance of the switch type charging chip is known to be 50 ℃/W, the theoretical temperature rise is 37 ℃, and therefore the temperature rise data of the switch type charging chip is basically consistent with the theoretical data. The charging efficiency can reach 94% at most, only 6% of electric energy is converted into heat energy, and then the charging current can be increased, the charging speed is accelerated, and the charging efficiency is improved under the condition of ensuring safe temperature rise.
Specifically, the model of the switching type charging chip includes ETA 6003.
The switching type charging chip of the ETA6003 model is small in package, and the switching type peripheral charging circuit designed by adopting the switching type charging chip of the ETA6003 model is simple and high in charging efficiency. In addition, the charging heating loss can be greatly reduced, the charging is guaranteed to use large charging current within a safe temperature range, the charging current is improved under the condition of safe temperature rise, and the charging speed can be accelerated.
Fig. 2 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 2, the switch-type peripheral charging circuit further includes a voltage-reducing module 140, a first end of the voltage-reducing module 140 is connected to a switching-regulation input end SW of the switch-type charging chip 120, a second end of the voltage-reducing module 140 is connected to a switching-regulation output end SYS of the switch-type charging chip 120, and the voltage-reducing module 140 is configured to reduce the input voltage of the dc power supply 110.
The voltage reducing module 140 releases the electric energy according to the requirement of the battery 130 to be charged, for example, reduces the voltage output by the switch type charging chip 120 according to the requirement of the battery 130 to be charged. The switching of the switching type charging chip 120 is used to regulate the voltage input from the dc power source 110 to the switching type charging chip 120. A switching regulation input terminal SW of the switching charging chip 120, configured to output a voltage that the dc power supply 110 inputs to the switching charging chip 120, a first terminal of the voltage reduction module 140 is connected to the switching regulation input terminal SW of the switching charging chip 120, and the switching regulation input terminal SW of the switching charging chip 120 provides the voltage that the dc power supply 110 inputs to the switching charging chip 120 to the first terminal of the voltage reduction module 140; the switching regulation output terminal SYS of the switching type charging chip 120 is also a system voltage output terminal for outputting a charging voltage of the switching type peripheral charging circuit. The second terminal of the voltage-reducing module 140 is connected to the switching-regulation output terminal SYS of the switching-type charging chip 120, and the switching-regulation output terminal SYS of the switching-type charging chip 120 provides the second terminal of the voltage-reducing module 140 with the charging voltage of the switching-type peripheral charging circuit. When the voltage input from the dc power source 110 to the switch-type charging chip 120 is greater than the constant voltage threshold voltage of the switch-type charging chip 120, the voltage-reducing module 140 needs to reduce the voltage input from the dc power source 110 to the switch-type charging chip 120. In the voltage reduction process of the voltage reduction module 140, the voltage reduction module 140 continuously performs the charging and discharging processes because the voltage applied to the first end of the voltage reduction module 140 is greater than the voltage applied to the second end of the voltage reduction module, and when the charging and discharging states of the voltage reduction module 140 reach a balance, the voltage reduction module 140 can reduce the voltage of the input switch-type charging chip 120 of the dc power supply 110. Therefore, the voltage reduction module 140 can indirectly protect the battery 130 to be charged, prevent the battery 130 to be charged from being damaged due to the fact that the voltage output by the direct current power supply 110 is too high, and reduce the loss of the battery 130 to be charged.
Fig. 3 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 3, the voltage-reducing module 140 includes an inductor 141, a first terminal of the inductor 141 serves as a first terminal of the voltage-reducing module 140, and a second terminal of the inductor 141 serves as a second terminal of the voltage-reducing module 140.
Wherein, the first end of the inductor 141 is used as the first end of the voltage-reducing module 140, and the second end of the inductor 141 is used as the second end of the voltage-reducing module 140, and it can be known that the first end of the inductor 141 is the voltage input to the switch-type charging chip 120 from the dc power supply 110 provided by the switch regulation input terminal SW of the switch-type charging chip 120; the second terminal of the inductor 141 is the charging voltage of the switch-type peripheral charging circuit provided by the switch regulation output terminal SYS of the switch-type charging chip 120. Since the voltage input to the switch-type charging chip 120 from the dc power supply 110 is greater than the charging voltage of the switch-type peripheral charging circuit, the voltage at the first terminal of the inductor 141 is greater than the voltage at the second terminal of the inductor 141, and the inductor 141 starts to be charged and discharged continuously. Assume that the voltage input to the switch-type charging chip 120 from the dc power supply 110 is Vin, and the charging voltage of the switch-type peripheral charging circuit is Vo. When inductor 141 is charged, the voltage across inductor 141 is (Vin-Vo), and inductor 141 is excited by the voltage (Vin-Vo), and the magnetic flux added by inductor 141 is: (Vin-Vo) x Ton; when inductor 141 discharges, inductor 141 is demagnetized due to the continuity of inductor 141 current, and the magnetic flux reduced by inductor 141 is: (Vo) × Toff (Ton is the charging time of inductor 141, Toff is the discharging time of inductor 141); when the charging and discharging states of the inductor 141 are balanced, that is, (Vin-Vo) × Ton is (Vo) × Toff, the step-down function is realized.
Fig. 4 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 4, the switch-type peripheral charging circuit further includes a filtering module 150, a first end of the filtering module 150 is connected to the dc power supply 110 and the input end of the switch-type charging chip 120, a second end of the filtering module 150 is grounded, and the filtering module 150 is configured to filter the dc voltage provided by the dc power supply 110.
The dc voltage output from the dc power supply 110 may be doped with ac voltage and/or noise voltage. The filtering module 150 has a direct current-alternating current blocking characteristic, and can filter an alternating current voltage and/or a noise voltage doped in the direct current voltage output by the direct current power supply 110. The first terminal of the filtering module 150 is connected to the input terminals of the dc power supply 110 and the switch-type charging chip 120, and when a noise voltage and/or an ac voltage higher and/or lower than an average voltage output from the dc power supply 110 flows in, the noise voltage and/or the ac voltage may flow in the filtering module 150. The second terminal of the filtering module 150 is grounded, and thus the dc power supply 110, the filtering module 150 and the ground form a path, and the noise voltage and/or the ac voltage flows into the ground, thereby implementing the function of filtering the noise voltage and/or the ac voltage by the filtering module 150.
Fig. 5 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 5, the filter module 150 includes a first capacitor 151, a first pole of the first capacitor 151 is used as a first terminal of the filter module 150, and a second pole of the first capacitor 151 is used as a second terminal of the filter module 150.
The dc voltage output from the dc power supply 110 may be doped with ac voltage and/or noise voltage. The first capacitor 151 has a dc-dc blocking characteristic, and can filter out an ac voltage and/or a noise voltage doped in the dc voltage output from the dc power supply 110. The first pole of the first capacitor 151 is used as the first terminal of the filter module 150, the second pole of the first capacitor 151 is used as the second terminal of the filter module 150, it can be known that the first pole of the first capacitor 151 is connected to the dc power source 110, the second pole of the first capacitor 151 is grounded, when a noise voltage and/or an ac voltage higher and/or lower than the average voltage output by the dc power source 110 flows in, the capacitor is continuously charged and discharged, and the noise voltage flows in the first capacitor 151. The second terminal of the first capacitor 151 is grounded, and thus the dc power supply 110, the first capacitor 151 and the ground form a path, and the noise voltage and/or the ac voltage flows into the ground, so as to implement the function of the filtering module 150 for filtering the noise voltage and/or the ac voltage. The characteristic of the capacitor is utilized to effectively filter noise voltage, and the filter circuit is low in cost and easy to realize a filter function.
Fig. 6 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 6, the switch-type peripheral charging circuit further includes a second capacitor 160, a first pole of the second capacitor 160 is connected to the output terminal BATT of the switch-type charging chip 120, and a second pole of the second capacitor 160 is grounded.
The second capacitor 160 is used for stabilizing voltage, and because the capacitor has an energy storage characteristic, when voltages at two ends of the capacitor are inconsistent, the capacitor can be continuously charged and discharged until charging and discharging reach a balanced state, that is, the charged electric quantity in unit time is equal to the discharged electric quantity, so that the voltage stabilizing effect can be achieved. The first pole of the second capacitor 160 is connected to the output terminal BATT of the switch-type charging chip 120, and the second pole of the second capacitor 160 is grounded, so that the output terminal of the switch-type charging chip 120, the second capacitor 160 and the ground form a path, and further, the charge-discharge balance state of the capacitors can be realized, thereby effectively realizing the voltage stabilizing function.
Fig. 7 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 7, the switch-type peripheral charging circuit further includes a current regulation module 170, a first terminal of the current regulation module 170 is connected to the current input terminal ISET1 of the switch-type charging chip 120, and a second terminal of the current regulation module 170 is grounded.
The current adjusting module 170 is configured to adjust a charging current when the battery 130 to be charged is charged with a constant current. The first terminal of the current adjusting module 170 is connected to the current input terminal ISET1 of the switch-type charging chip 120, and can be connected to a voltage reference circuit inside the switch-type charging chip 120, and the specific magnitude of the charging current in the constant current charging is determined by both the current input terminal and the voltage reference circuit. The second end of the current adjusting module 170 is grounded, so that the current adjusting module 170, the voltage reference circuit inside the switch-type charging chip 120 and a ground path are conveniently formed, and the magnitude of the charging current during the constant current charging is adjusted together. The current adjusting module 170 can set the charging current of the rechargeable battery 130 during constant current charging, and when the rechargeable battery 130 is subjected to constant current charging, the rechargeable battery 130 is charged by adopting a large current, so that the charging speed of the rechargeable battery 130 can be increased, the charging time of the rechargeable battery 130 is shortened, and the charging efficiency of the rechargeable battery 130 is improved.
Fig. 8 is a schematic structural diagram of another switch-type peripheral charging system according to an embodiment of the present invention. As shown in fig. 8, the current regulation module 170 includes a first resistor 171, a first end of the first resistor 171 serves as a first end of the current regulation module 170, and a second end of the first resistor 171 serves as a second end of the current regulation module 170.
It is noted that the first terminal of the first resistor 171 is the first terminal of the current adjusting module 170, the second terminal of the first resistor 171 is the second terminal of the current adjusting module 170, the first terminal of the first resistor 171 is connected to the current input terminal ISET1 of the switching type charging chip 120, and can be connected to the voltage reference circuit inside the switching type charging chip 120, and the specific magnitude of the charging current during the constant current charging is determined by both of them. For example, the magnitude of the charging current when the battery 130 to be charged is subjected to constant current charging is as follows: ICHARGE is 1V/R × 1000(ICHARGE is the magnitude of the charging current during constant current charging, and R is the first resistor 171). A second terminal of the first resistor 171 is grounded. The first resistor 171, the voltage reference circuit inside the switch-type charging chip 120, and the ground form a path, which collectively adjust the magnitude of the charging current during constant current charging.
The embodiment of the utility model provides a charging system is still provided, including the switch type peripheral hardware charging circuit and the battery of any one of the above-mentioned embodiments; the switch type peripheral charging circuit is connected with the battery and used for charging the battery.
The battery is a rechargeable battery, for example, a rechargeable battery such as a lithium battery, which is not limited in this disclosure.
Charging system includes the utility model discloses the switch type peripheral hardware charging circuit that arbitrary embodiment provided, consequently have the utility model provides a switch type peripheral hardware charging circuit's beneficial effect, here is no longer repeated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A switch type peripheral charging circuit is characterized by comprising a switch type charging chip;
the input end of the switch type charging chip is connected with the direct current power supply, the output end of the switch type charging chip is connected with the battery to be charged, the switch type charging chip is used for performing constant current charging on the battery to be charged when the voltage of the battery to be charged is smaller than the constant voltage threshold voltage of the switch type charging chip, and the voltage of the battery to be charged is larger than or equal to the constant voltage threshold voltage of the switch type charging chip and then performing constant voltage charging on the battery to be charged.
2. The switched mode peripheral charging circuit of claim 1, wherein the model number of the switched mode charging chip comprises ETA 6003.
3. The switch-type peripheral charging circuit according to claim 1, further comprising a voltage-reducing module, wherein a first terminal of the voltage-reducing module is connected to a switching regulation input terminal of the switch-type charging chip, a second terminal of the voltage-reducing module is connected to a switching regulation output terminal of the switch-type charging chip, and the voltage-reducing module is configured to reduce the input voltage of the dc power supply.
4. The switch-type peripheral charging circuit of claim 3, wherein the voltage-reducing module comprises an inductor, a first terminal of the inductor being a first terminal of the voltage-reducing module, and a second terminal of the inductor being a second terminal of the voltage-reducing module.
5. The switch-type peripheral charging circuit according to claim 1, further comprising a filtering module, wherein a first end of the filtering module is connected to the dc power supply and an input end of the switch-type charging chip, a second end of the filtering module is grounded, and the filtering module is configured to filter a dc voltage output by the dc power supply.
6. The switch-type peripheral charging circuit of claim 5, wherein the filtering module comprises a first capacitor, a first pole of the first capacitor being a first terminal of the filtering module, and a second pole of the first capacitor being a second terminal of the filtering module.
7. The switch-type peripheral charging circuit of claim 1, further comprising a second capacitor, wherein a first pole of the second capacitor is connected to the output terminal of the switch-type charging chip, and a second pole of the second capacitor is grounded.
8. The switch-type peripheral charging circuit according to claim 1, further comprising a current regulation module, wherein a first terminal of the current regulation module is connected to the current input terminal of the switch-type charging chip, and a second terminal of the current regulation module is grounded.
9. The switch-mode peripheral charging circuit of claim 8, wherein the current regulation module comprises a first resistor, a first terminal of the first resistor being a first terminal of the current regulation module, and a second terminal of the first resistor being a second terminal of the current regulation module.
10. A charging system comprising the switch-type peripheral charging circuit of any one of claims 1-9 and a battery; the switch type peripheral charging circuit is connected with the battery and used for charging the battery.
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| CN112564236A (en) * | 2020-12-14 | 2021-03-26 | 广州小鸡快跑网络科技有限公司 | Switch-type peripheral charging circuit and charging system |
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| CN112564236A (en) * | 2020-12-14 | 2021-03-26 | 广州小鸡快跑网络科技有限公司 | Switch-type peripheral charging circuit and charging system |
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