CN205051406U - Lithium batteries control circuit - Google Patents
Lithium batteries control circuit Download PDFInfo
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- CN205051406U CN205051406U CN201520754618.7U CN201520754618U CN205051406U CN 205051406 U CN205051406 U CN 205051406U CN 201520754618 U CN201520754618 U CN 201520754618U CN 205051406 U CN205051406 U CN 205051406U
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Abstract
The utility model discloses a lithium batteries control circuit, including diode VD1, fuse RF, inductance L, transformer T, electric capacity C1, resistance R1 and chip U1, the anodal 220V alternating current one end of connecting of diode VD1, fuse RF is connected to diode VD1 negative pole, inductance L is connected to the fuse RF other end, electric capacity C1 and transformer T coil L1 are connected respectively to the inductance L other end, it is anodal that diode VD2 is connected respectively to the electric capacity C1 other end, resistance R4 and electric capacity C6, the electric capacity C6 other end and resistance R5 are connected respectively to the resistance R4 other end, diode VD6 negative pole is connected to the resistance R5 other end, chip U1 pin S is connected respectively to diode VD6 positive pole, electric capacity C2, electric capacity C5, diode VD3 is anodal, resistance R2, electric capacity C3 and electric capacity C4. The utility model discloses lithium batteries control circuit adopts LNK564P as controlling element, and circuit structure is simple, and is with low costs, small, and unloaded low power dissipation has short -circuit protection function, security height, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of charging control circuit, specifically a kind of lithium cell charging control circuit.
Background technology
Lithium battery as a kind of can the power store of Reusability; application widely; but the useful life of lithium battery and it whether often to overcharge relation very large; frequent overcharge; meeting high degree shortens the life-span of lithium battery, more existing lithium battery charging circuit complex structures, and cost is high; and there is function singleness, there is no charge protection etc. shortcoming.
Utility model content
The purpose of this utility model is to provide a kind of lithium cell charging control circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of lithium cell charging control circuit, comprises diode VD1, fuse RF, inductance L, transformer T, electric capacity C1, resistance R1 and chip U1, described diode VD1 positive pole connects 220V alternating current one end, and diode VD1 negative pole connects fuse RF, and the fuse RF other end connects inductance L, the inductance L other end connects electric capacity C1 and transformer T coil L1 respectively, and the electric capacity C1 other end connects diode VD2 positive pole respectively, resistance R4 and electric capacity C6, the resistance R4 other end connects the electric capacity C6 other end and resistance R5 respectively, and the resistance R5 other end connects diode VD6 negative pole, and diode VD6 positive pole connects chip U1 pin S respectively, electric capacity C2, electric capacity C5, diode VD3 positive pole, resistance R2, electric capacity C3 and electric capacity C4, the electric capacity C5 other end connects chip U1 pin FB respectively, the resistance R2 other end and resistance R1, the resistance R1 other end connects the electric capacity C3 other end and transformer T1 coil L3 respectively, and the transformer T coil L3 other end connects diode VD3 negative pole, and the described electric capacity C4 other end connects diode VD5 positive pole respectively, resistance R3, electric capacity C5 and transformer T coil L2, the transformer T coil L2 other end connects diode VD4 positive pole, and diode VD4 negative pole connects the electric capacity C5 other end respectively, the resistance R3 other end, diode VD5 negative pole and output end vo, described chip U1 adopts LNK564P.
As further program of the utility model: described diode VD5 is voltage stabilizing didoe.
As the utility model further scheme: described output end vo connects 3.7V lithium battery.
Compared with prior art, the beneficial effects of the utility model are: the utility model lithium cell charging control circuit adopts LNK564P as control element, and circuit structure is simple; cost is low, and volume is little, and no-load power consumption is low; with short-circuit protection function, fail safe is high, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of lithium cell charging control circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of lithium cell charging control circuit, comprises diode VD1, fuse RF, inductance L, transformer T, electric capacity C1, resistance R1 and chip U1, diode VD1 positive pole connects 220V alternating current one end, and diode VD1 negative pole connects fuse RF, and the fuse RF other end connects inductance L, the inductance L other end connects electric capacity C1 and transformer T coil L1 respectively, and the electric capacity C1 other end connects diode VD2 positive pole respectively, resistance R4 and electric capacity C6, the resistance R4 other end connects the electric capacity C6 other end and resistance R5 respectively, and the resistance R5 other end connects diode VD6 negative pole, and diode VD6 positive pole connects chip U1 pin S respectively, electric capacity C2, electric capacity C5, diode VD3 positive pole, resistance R2, electric capacity C3 and electric capacity C4, the electric capacity C5 other end connects chip U1 pin FB respectively, the resistance R2 other end and resistance R1, the resistance R1 other end connects the electric capacity C3 other end and transformer T1 coil L3 respectively, and the transformer T coil L3 other end connects diode VD3 negative pole, and the described electric capacity C4 other end connects diode VD5 positive pole respectively, resistance R3, electric capacity C5 and transformer T coil L2, the transformer T coil L2 other end connects diode VD4 positive pole, and diode VD4 negative pole connects the electric capacity C5 other end respectively, the resistance R3 other end, diode VD5 negative pole and output end vo, described chip U1 adopts LNK564P.
Diode VD5 is voltage stabilizing didoe.
Output end vo connects 3.7V lithium battery.
Operation principle of the present utility model is: refer to Fig. 1, first alternating current 220V input voltage makes halfwave rectifier through VD1, then pass through by L, extremely low-loss input filtering device filtering interfering of C1 composition, RF is fuse, it can not only replace cartridge fuse to play current-limiting protection effect, also can reduce the loss of input stage, because LNK564P has frequency jitter characteristic, therefore input does not need to use electromagnetic interface filter, only can meet the demands with an input filter capacitor C1, VD1 adopts 1N4937 type silicon diode, resistance R4, R5, electric capacity C6 and diode VD6 forms clamping protective circuit, guarantee that the MOSFET in chip U1 can not be breakdown, export rectifying tube VD4 and adopt UF4002 type 1A/400V Ultrafast recovery diode, C5 is output filter capacitor, R3 is dummy load, the output end vo voltage be used for when limiting zero load is unlikely too high, no-load power consumption is no more than 140mW.
The output voltage of transformer coil L3 first through VD3, C3 rectifying and wave-filtering, then after R1 and R2 dividing potential drop, provides feedback voltage to LNK564P.LNK564P is operated in constant voltage region in nominal load situation, and the voltage U FB of FB end maintains 1.69V.During overload, UFB starts to reduce, and electric power output voltage decreases.Meanwhile, internal oscillation frequency also reduces linearly, until reach 50% of original frequency, when FB lower than power supply during autoboot voltage 0.8V by service intermittent, namely first close 800ms, then open 100ms.This process will constantly repeat, until UFB exceedes again autoboot voltage.When output end vo is short-circuited fault, utilize autoboot function to reduce average output current, make average short circuit output current much smaller than 1A, if the capacity of C2 is increased to 0.47uF or higher, then can reduce no-load loss further.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a lithium cell charging control circuit, comprises diode VD1, fuse RF, inductance L, transformer T, electric capacity C1, resistance R1 and chip U1, it is characterized in that, described diode VD1 positive pole connects 220V alternating current one end, diode VD1 negative pole connects fuse RF, the fuse RF other end connects inductance L, the inductance L other end connects electric capacity C1 and transformer T coil L1 respectively, and the electric capacity C1 other end connects diode VD2 positive pole respectively, resistance R4 and electric capacity C6, the resistance R4 other end connects the electric capacity C6 other end and resistance R5 respectively, and the resistance R5 other end connects diode VD6 negative pole, and diode VD6 positive pole connects chip U1 pin S respectively, electric capacity C2, electric capacity C5, diode VD3 positive pole, resistance R2, electric capacity C3 and electric capacity C4, the electric capacity C5 other end connects chip U1 pin FB respectively, the resistance R2 other end and resistance R1, the resistance R1 other end connects the electric capacity C3 other end and transformer T1 coil L3 respectively, and the transformer T coil L3 other end connects diode VD3 negative pole, and the described electric capacity C4 other end connects diode VD5 positive pole respectively, resistance R3, electric capacity C5 and transformer T coil L2, the transformer T coil L2 other end connects diode VD4 positive pole, and diode VD4 negative pole connects the electric capacity C5 other end respectively, the resistance R3 other end, diode VD5 negative pole and output end vo, described chip U1 adopts LNK564P.
2. lithium cell charging control circuit according to claim 1, is characterized in that, described diode VD5 is voltage stabilizing didoe.
3. lithium cell charging control circuit according to claim 1, is characterized in that, described output end vo connects 3.7V lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754618.7U CN205051406U (en) | 2015-09-25 | 2015-09-25 | Lithium batteries control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754618.7U CN205051406U (en) | 2015-09-25 | 2015-09-25 | Lithium batteries control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205051406U true CN205051406U (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520754618.7U Expired - Fee Related CN205051406U (en) | 2015-09-25 | 2015-09-25 | Lithium batteries control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205051406U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681455A (en) * | 2017-07-17 | 2019-04-26 | 宁夏天绿健知识产权运营有限公司 | A kind of smart home fan control system |
-
2015
- 2015-09-25 CN CN201520754618.7U patent/CN205051406U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681455A (en) * | 2017-07-17 | 2019-04-26 | 宁夏天绿健知识产权运营有限公司 | A kind of smart home fan control system |
| CN109707652A (en) * | 2017-07-17 | 2019-05-03 | 宁夏天绿健知识产权运营有限公司 | A kind of fan control system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20190925 |