CN204481538U - A kind of AC-DC dual-input charger - Google Patents
A kind of AC-DC dual-input charger Download PDFInfo
- Publication number
- CN204481538U CN204481538U CN201520238309.4U CN201520238309U CN204481538U CN 204481538 U CN204481538 U CN 204481538U CN 201520238309 U CN201520238309 U CN 201520238309U CN 204481538 U CN204481538 U CN 204481538U
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of AC-DC dual-input charger, comprises alternating current 220V input interface, input rectifying filter circuit, transformer, output rectifier and filter, direct current 8.4V output circuit, battery contact, sampling feedback circuit, pwm control circuit, direct current 5V input interface, DC/DC booster circuit.Described alternating current 220V input interface, input rectifying filter circuit, transformer, output rectifier and filter, direct current 8.4V output circuit, battery contact connect successively; Described sampling feedback circuit one end is connected to direct current 8.4V output circuit, and the other end is connected successively with pwm control circuit, transformer; Described direct current 5V input interface, DC/DC booster circuit, output rectifier and filter connect successively.The utility model beneficial effect is: the function of AC charging and DC charging united two into one, and reduces the volume of charger, easy to carry, expands the scope of application of charger, can also reduce costs in addition.
Description
Technical field
The utility model relates to a kind of lithium battery charging device, especially supports the charger of alternating current-direct current dual input.
Background technology
Nowadays, digital single-lens reflex camera and video camera have brought very large convenience along with the development of technology and the perfect of function, also can increase power consumption simultaneously.A battery being full of electricity has just consumed electricity in have more than is needed several hours under the condition of continuous operation, camera and video camera could be allowed to work on after the battery having consumed electricity will charge.When user out of doors or out on tours time just need a set of charging device that can carry with to be battery charging, so a set of charging device can be portable power source and the combination of this charger, computer USB and the combination of this charger, onboard charger and the combination of this charger also can be that storage battery and this charger combine.The charger of prior art adopts the single power supply of alternating current 220V, do not support powered by direct current, obviously cannot meet the people used out of doors.
Utility model content
Technical problem to be solved in the utility model is: for prior art charger existing for limitation, a kind of charger supporting alternating current and direct current dual input is provided.
The technical scheme that the utility model adopts is: a kind of AC-DC dual-input charger, comprises alternating current 220V input interface, input rectifying filter circuit, transformer, output rectifier and filter, direct current 8.4V output circuit, battery contact, sampling feedback circuit, pwm control circuit, direct current 5V input interface, DC/DC booster circuit.Described alternating current 220V input interface, input rectifying filter circuit, transformer, output rectifier and filter, direct current 8.4V output circuit, battery contact connect successively; Described sampling feedback circuit one end is connected to direct current 8.4V output circuit, and the other end is connected successively with pwm control circuit, transformer; Described direct current 5V input interface, DC/DC booster circuit, output rectifier and filter connect successively.
Described sampling feedback circuit comprises three-terminal voltage-stabilizing diode and optical coupler, and higher-pressure region and low-pressure area are kept apart, and improves fail safe.
Described direct current 5V input interface is Micro USB, for connecting the storage battery of portable power source that direct current 5V exports, computer USB, onboard charger and 6V, has flexibly, feature easily.
Described DC/DC booster circuit comprises current limliting constant voltage circuit, has safety, high efficiency feature.
Described direct current 8.4V output circuit comprises battery and is full of the control circuit automatically stopping exporting, and prevents over-charging of battery from damaging.
When not having alternating current 220V to input, the storage battery of portable power source, computer USB, onboard charger and 6V that the utility model can utilize direct current 5V to export, as power supply, obtains direct current 8.4V and charges to the lithium battery of digital single-lens reflex camera and video camera for user after DC/DC boosting.
The utility model beneficial effect is: the function of AC charging and DC charging united two into one, and reduces the volume of charger, easy to carry, expands the scope of application of charger, can also reduce costs in addition.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, wherein, alternating current 220V importation is Switching Power Supply, comprise alternating current 220V input interface, input rectifying filter circuit, transformer, output rectifier and filter, direct current 8.4V output circuit, battery contact connect successively, the electric current of input carries out rectification and filtering through input rectifying filter circuit and exports transformer to and carry out step-down process, and obtains the direct voltage output of 8.4V to battery contact after carrying out rectification and filtering by output rectifier and filter.Sampling feedback circuit one end is connected to direct current 8.4V output circuit, the other end is connected with pwm control circuit one end, secondly the pwm control circuit other end is connected with transformer again, sampling feedback circuit comprises three-terminal voltage-stabilizing diode and optical coupler, feed back to pwm control circuit after voltage after output rectification filter is sampled, thus adjustment PWM pulse-width signal makes the 8.4V direct voltage of transformer stable output.
Direct current 5V importation is DC/DC circuit, comprise direct current 5V input interface, DC/DC booster circuit, output rectifier and filter connect successively, direct current 5V input interface for connect direct current 5V and export portable power source, computer USB, onboard charger and 6V storage battery, carry out boosting through DC/DC booster circuit, current limliting, export the output of output rectifier and filter after constant voltage process to, the voltage then obtaining direct current about 8.4V exports battery contact to again.
When not having alternating current 220V to input, the storage battery of portable power source, computer USB, onboard charger and 6V that the utility model can utilize direct current 5V to export is as power supply, after DC/DC boosting, obtaining direct current 8.4V for user charges to the lithium battery of digital single-lens reflex camera and video camera, thus meets the needs that user uses out of doors.
Be carry out in conjunction with above-mentioned specific embodiment to disclosed utility model, but can modify to foregoing to those skilled in the art, supplement and replace and be easy to realize.Therefore, all do under spirit of the present utility model and principle any amendment, supplement and replacement etc., all should be included within claim protection range of the present utility model.
Claims (4)
1. an AC-DC dual-input charger, comprise alternating current 220V input interface, input rectifying filter circuit, transformer, output rectifier and filter, direct current 8.4V output circuit, battery contact connect successively, sampling feedback circuit one end is connected to direct current 8.4V output circuit, the other end is connected successively with pwm control circuit, transformer, it is characterized in that: also comprise direct current 5V input interface, DC/DC booster circuit is connected successively with described output rectifier and filter.
2. the AC-DC dual-input charger according to claims 1, is characterized in that: described direct current 5V input interface is Micro USB.
3. the AC-DC dual-input charger according to claims 1, is characterized in that: described DC/DC booster circuit also comprises current limliting constant voltage circuit.
4. the AC-DC dual-input charger according to claims 1, is characterized in that: described direct current 8.4V output circuit also comprises battery and is full of the control circuit automatically stopping exporting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520238309.4U CN204481538U (en) | 2014-07-01 | 2015-04-18 | A kind of AC-DC dual-input charger |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014203713504 | 2014-07-01 | ||
| CN201420371350 | 2014-07-01 | ||
| CN201520238309.4U CN204481538U (en) | 2014-07-01 | 2015-04-18 | A kind of AC-DC dual-input charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204481538U true CN204481538U (en) | 2015-07-15 |
Family
ID=53637311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520238309.4U Expired - Fee Related CN204481538U (en) | 2014-07-01 | 2015-04-18 | A kind of AC-DC dual-input charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204481538U (en) |
-
2015
- 2015-04-18 CN CN201520238309.4U patent/CN204481538U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20210418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |