CN217590611U - Low-voltage large-current direct-current power supply conversion circuit - Google Patents
Low-voltage large-current direct-current power supply conversion circuit Download PDFInfo
- Publication number
- CN217590611U CN217590611U CN202221816435.XU CN202221816435U CN217590611U CN 217590611 U CN217590611 U CN 217590611U CN 202221816435 U CN202221816435 U CN 202221816435U CN 217590611 U CN217590611 U CN 217590611U
- Authority
- CN
- China
- Prior art keywords
- resistance
- triode
- resistor
- current
- stabiliser
- 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
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a low-voltage heavy current DC power supply converting circuit still includes amplifier circuit, protection circuit, the stabiliser that flows expands is including expanding flow resistance, stabiliser, it is parallelly connected with the stabiliser to expand flow resistance, the amplifier circuit includes amplifier, fourth resistance, fifth resistance, ninth resistance, fourth electric capacity, third triode, sixth resistance, seventh resistance, eighth resistance, protection circuit includes fourth triode, protection circuit control chip. The utility model discloses in order to avoid the stabiliser when out of control, increased the ripple voltage of output, the utility model discloses still set up amplifier circuit and bypass circuit in the circuit, bypass circuit and stabiliser are the parallel state also, utilize amplifier circuit to control bypass circuit to alleviate the ripple voltage of output.
Description
Technical Field
The utility model relates to a power supply switching circuit technical field specifically is a low-voltage heavy current DC power supply switching circuit.
Background
At present, with the rapid development of power supply technology, more and more direct-current power supplies such as mobile power supplies and the like are in the lives of people, and convenience is brought to the lives and the study of people.
However, some dc power supplies have a small current when outputting a low voltage, and cannot meet the power supply or charging requirements of a load, but the current expanding circuit cannot adapt to a variable load, otherwise, the voltage stabilizer is out of control during a light load, and the ripple voltage of the output end is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low-voltage heavy current DC power supply converting circuit can solve the stabiliser out of control, alleviates the ripple voltage's of output technical problem to circuit structure is simple, and is with low costs.
In order to achieve the above object, the utility model provides a technical scheme: the utility model provides a low-voltage heavy current DC power supply converting circuit, is including expanding a class stabiliser, amplifier circuit, protection circuit, expand a class stabiliser including expanding a class resistance, stabiliser, expand a class resistance and stabiliser parallelly connected, amplifier circuit includes amplifier, fourth resistance, fifth resistance, ninth resistance, fourth electric capacity, third triode, sixth resistance, seventh resistance, eighth resistance, protection circuit includes fourth triode, protection circuit control chip, the inverting input termination of amplifier is the one end of fourth resistance, the other termination of fourth resistance expands the anodal output of class stabiliser, the one end of the homophase input termination fifth resistance of amplifier, the one end of ninth resistance, the one end of fifth resistance, the projecting pole of third triode, the output of another termination amplifier of ninth resistance, the one end of eighth resistance, the other termination of eighth resistance base of third triode, the collecting electrode of third triode connects the one end of seventh resistance, the negative output of expanding a class stabiliser, another negative pole of the negative pole of seventh resistance, the output of sixth resistance, the positive termination of protection circuit expands the anodal output of class stabiliser and the input control chip of the input termination of fourth triode, the negative pole control chip of expansion protection triode, the input termination of input control chip of triode.
Preferably, the voltage stabilizer comprises a first triode, a second triode, a first capacitor, a first resistor, a second resistor and a voltage regulator tube, wherein an emitting electrode of the second triode is connected with an emitting electrode of a fourth triode, one end of a current expansion resistor, one end of the second resistor and one end of the first capacitor, the other end of the second resistor is connected with a base electrode of the second triode and a collector electrode of the first triode, an emitting electrode of the first triode is connected with one end of the first resistor and one end of the voltage regulator tube, a collector electrode of the second triode is connected with the other end of the current expansion resistor, a base electrode of the first triode is connected with one end of the second capacitor, and the other end of the first resistor and the other end of the second capacitor are connected with a negative output end of the current expansion voltage stabilizer.
Preferably, the current-amplifying voltage stabilizer further comprises a tenth resistor and an eleventh resistor, one end of the tenth resistor is connected to the positive output end of the current-amplifying voltage stabilizer, the other end of the tenth resistor is connected to one end of the eleventh resistor and the base of the first triode, and the other end of the eleventh resistor is connected to the negative output end of the current-amplifying voltage stabilizer.
Preferably, the current-amplifying voltage stabilizer further comprises a third capacitor, one end of the third capacitor is connected to the positive output end of the current-amplifying voltage stabilizer, and the other end of the third capacitor is connected to the negative output end of the current-amplifying voltage stabilizer.
Preferably, the power end of the protection circuit control chip is connected in parallel with a capacitor.
Preferably, the power end of the protection circuit control chip is connected with a backup battery.
Preferably, the protection circuit control chip is of a NUP4201MR6T1G model.
Compared with the prior art, the beneficial effects of the utility model are that:
1. when avoiding the stabiliser out of control, increased the ripple voltage of output, the utility model discloses still set up amplifier circuit and bypass circuit in the circuit, bypass circuit and stabiliser are also parallel state, utilize amplifier circuit to control bypass circuit to alleviate the ripple voltage of output. When the current-expanding voltage stabilizer works normally, the third electrode tube is in a conducting state, the resistors in the bypass circuit are a sixth resistor and a seventh resistor, the seventh resistor is large and is equivalent to an infinite resistor which is connected with the current-expanding resistor in parallel, and current flows through a current-expanding resistor branch circuit to output large current; when the current expansion voltage stabilizer is out of control, the current output by the current expansion voltage stabilizer is compared by the amplifier, the output end of the amplifier controls the third electrode tube to be disconnected, the resistor in the bypass circuit is the sixth resistor, and the sixth resistor is used for realizing the shunting effect, so that the ripple voltage of the output end is relieved.
2. When the current is abnormal, the protection circuit control chip controls the fourth triode to be disconnected, so that the whole current expansion voltage stabilizer is disconnected, the damage of components is avoided, and the circuit protection is realized.
3. The utility model discloses a protection circuit control chip power supply safety makes protection circuit control chip's power end and an electric capacity C31 parallelly connected.
4. The utility model discloses a protection circuit control chip's power end is connected with backup battery, and protection circuit control chip independently comes out from the circuit, and protection circuit control chip still can normally work when the circuit is unusual.
5. The utility model discloses a circuit structure is simple, and is with low costs, and safe and reliable can use widely on a large scale.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a schematic circuit diagram of the protection circuit of the present invention.
In the figure: r1 and a first resistor; r2 and a second resistor; r3, a current expansion resistor; r4 and a fourth resistor; r5 and a fifth resistor; r6 and a sixth resistor; r7 and a seventh resistor; r8 and an eighth resistor; r9 and a ninth resistor; r10 and a tenth resistor; r11 and an eleventh resistor; c1, a first capacitor; c2, a second capacitor; c31, capacitance; q1, a first triode; q2 and a second triode; q3, a third triode; U1A and an amplifier; u6, a protection circuit chip;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1-2, an embodiment of the present disclosure provides a low-voltage large-current dc power conversion circuit, which includes a current expansion regulator, an amplifier circuit, and a protection circuit, where the current expansion regulator includes a current expansion resistor R3 and a voltage regulator, the current expansion resistor R3 is connected in parallel with the voltage regulator, the amplifier circuit includes an amplifier U1A, a fourth resistor R4, a fifth resistor R5, a ninth resistor R9, a fourth capacitor C31, a third triode Q3, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8, the protection circuit includes a fourth triode and a protection circuit control chip, an inverting input terminal of the amplifier U1A is connected to one end of the fourth resistor R4, another terminal of the fourth resistor R4 is connected to an anode output terminal of the current expansion regulator, a non-inverting input terminal of the amplifier U1A is connected to one end of the fifth resistor R5 and one end of the ninth resistor R9, the other end of the fifth resistor R5 is connected with one end of the sixth resistor R6 and the emitting electrode of the third triode Q3, the other end of the ninth resistor R9 is connected with the output end of the amplifier U1A and one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected with the base electrode of the third triode Q3, the collector electrode of the third triode Q3 is connected with one end of the seventh resistor R7 and the negative output end of the current expansion voltage stabilizer, the other end of the seventh resistor R7 is connected with the negative output end of the current expansion voltage stabilizer, the other end of the sixth resistor R6 is connected with the positive input end of the current expansion voltage stabilizer, the positive input end of the current expansion voltage stabilizer is connected with the emitting electrode of the fourth triode, the collector electrode of the fourth triode is connected with the output end of the protection circuit control chip, the positive input end of the protection circuit control chip is connected with the positive output end of the current expansion voltage stabilizer, and the negative input end of the protection circuit control chip is connected with the negative output end of the current expansion voltage stabilizer.
The voltage stabilizer comprises a first triode Q1, a second triode Q2, a first capacitor C31C1, a first resistor R1, a second resistor R2 and a voltage stabilizing tube, wherein an emitting electrode of the second triode is connected with an emitting electrode of a fourth triode, one end of a current spreading resistor R3, one end of a second resistor R2 and one end of a first capacitor C31C1, the other end of the second resistor R2 is connected with a base electrode of the second triode Q2 and a collector electrode of the first triode Q1, the emitting electrode of the first triode Q1 is connected with one end of the first resistor R1 and one end of the voltage stabilizing tube, the collector electrode of the second triode Q2 is connected with the other end of the current spreading resistor R3, a base electrode of the first triode Q1 is connected with one end of the second capacitor C31C2, the other end of the first resistor R1 and the other end of the second capacitor C31C2 are connected with a negative output end of the current spreading voltage stabilizer, one end of a tenth resistor R10 is connected with a positive output end of the current spreading voltage stabilizer,
the utility model discloses a further improve the steady voltage function of circuit, still include tenth resistance R10, eleventh resistance R11, third electric capacity C31, another termination eleventh resistance R11's of tenth resistance R10 one end, first triode Q1's base, another termination of eleventh resistance R11 expands the negative pole output of a current stabiliser, a termination of third electric capacity C31 expands the positive output of a current stabiliser, another termination of third electric capacity C31 expands the negative pole output of a current stabiliser.
The utility model discloses a protection circuit control chip power supply safety makes protection circuit control chip's power end and an electric capacity C31 parallelly connected.
The utility model discloses a protection circuit control chip's power end is connected with backup battery, and protection circuit control chip is independent from the circuit, and protection circuit control chip still can normally work when the circuit is unusual, and protection circuit control chip chooses for use the NUP4201MR6T1G model.
The working principle is as follows: in principle, all devices which are connected with the voltage stabilizer in parallel and can increase output electricity can be used for current expansion, so that the output current of the voltage stabilizer can be expanded after the current expansion resistor R3 is connected with the voltage stabilizer in parallel, the voltage stabilizer comprises a first triode Q1, a second triode Q2, a first capacitor C31C1, a first resistor R1, a second resistor R2, a voltage stabilizing tube, a tenth resistor R10, an eleventh resistor R11 and a third capacitor C31, and the voltage stabilizing effect can be achieved through the voltage stabilizing tube, the tenth resistor R10 and the eleventh resistor R11.
When avoiding the stabiliser out of control, increased the ripple voltage of output, the utility model discloses still set up amplifier circuit and bypass circuit in the circuit, bypass circuit and stabiliser are also parallel state, utilize amplifier circuit to control bypass circuit to alleviate the ripple voltage of output. When the current-expanding voltage stabilizer works normally, the third electrode tube is in a conducting state, the resistors in the bypass circuit are a sixth resistor and a seventh resistor, the seventh resistor is large and is equivalent to an infinite resistor which is connected with the current-expanding resistor in parallel, and current flows through a current-expanding resistor branch circuit to output large current; when the current expansion voltage stabilizer is out of control, the current output by the current expansion voltage stabilizer is compared by the amplifier, the output end of the amplifier controls the third electrode tube to be disconnected, the resistor in the bypass circuit is a sixth resistor, and the sixth resistor is utilized to realize the shunting effect, so that the ripple voltage of the output end is relieved.
In addition, the current output by the current expansion voltage stabilizer enters the protection circuit control chip, and when the current is abnormal, the protection circuit control chip controls the fourth triode to be disconnected, so that the whole current expansion voltage stabilizer is disconnected, the damage of components is avoided, and the circuit protection is realized.
In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a low-voltage heavy current DC power supply converting circuit, is including expanding a class stabiliser, its characterized in that still includes amplifier circuit, protection circuit, expand a class stabiliser including expanding a class resistance, stabiliser, expand a class resistance and stabiliser are parallelly connected, amplifier circuit includes amplifier, fourth resistance, fifth resistance, ninth resistance, fourth electric capacity, third triode, sixth resistance, seventh resistance, eighth resistance, protection circuit includes fourth triode, protection circuit control chip, the inverting input termination of amplifier connects the one end of fourth resistance, the other termination of fourth resistance expands the anodal output of a class stabiliser, the homophase input termination of amplifier connects the one end of fifth resistance, the one end of ninth resistance, the one end of the projecting pole of another termination sixth resistance of fifth resistance, the projecting pole of third triode, the output of another termination of ninth resistance amplifier, the one end of eighth resistance, the other termination of eighth resistance of third triode, the collector termination of third triode connects the one end of seventh resistance, the output of the negative pole of expanding a class stabiliser, the other termination of the negative pole of seventh resistance amplifier, the other termination of the positive pole protection circuit protection chip of the input termination of fourth resistance expands the anodal output of a class stabiliser and expands the input termination of input control chip and expands the anodal output of triode, the input termination of input control chip protection triode.
2. The low-voltage large-current direct-current power supply conversion circuit according to claim 1, wherein the voltage stabilizer comprises a first triode, a second triode, a first capacitor, a first resistor, a second resistor and a voltage regulator tube, wherein an emitter of the second triode is connected with an emitter of a fourth triode, one end of a current spreading resistor, one end of the second resistor and one end of the first capacitor, the other end of the second resistor is connected with a base of the second triode and a collector of the first triode, an emitter of the first triode is connected with one end of the first resistor and one end of the voltage regulator tube, a collector of the second triode is connected with the other end of the current spreading resistor, a base of the first triode is connected with one end of the second capacitor, and the other end of the first resistor and the other end of the second capacitor are connected with a negative output end of the current spreading voltage stabilizer.
3. The low-voltage large-current direct-current power conversion circuit according to claim 2, further comprising a tenth resistor and an eleventh resistor, wherein one end of the tenth resistor is connected to the positive output terminal of the current-spreading regulator, the other end of the tenth resistor is connected to one end of the eleventh resistor and the base of the first triode, and the other end of the eleventh resistor is connected to the negative output terminal of the current-spreading regulator.
4. The low-voltage large-current direct-current power conversion circuit according to claim 2, further comprising a third capacitor, wherein one end of the third capacitor is connected to the positive output end of the current-expanding voltage regulator, and the other end of the third capacitor is connected to the negative output end of the current-expanding voltage regulator.
5. A low-voltage high-current dc power conversion circuit according to claim 1, wherein the power supply terminal of the protection circuit control chip is connected in parallel with a capacitor.
6. The low-voltage high-current direct-current power conversion circuit according to claim 1, wherein a power supply end of the protection circuit control chip is connected with a backup battery.
7. The low-voltage high-current direct-current power conversion circuit according to claim 1, wherein the protection circuit control chip is of a NUP4201MR6T1G type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816435.XU CN217590611U (en) | 2022-06-27 | 2022-06-27 | Low-voltage large-current direct-current power supply conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816435.XU CN217590611U (en) | 2022-06-27 | 2022-06-27 | Low-voltage large-current direct-current power supply conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217590611U true CN217590611U (en) | 2022-10-14 |
Family
ID=83535832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221816435.XU Active CN217590611U (en) | 2022-06-27 | 2022-06-27 | Low-voltage large-current direct-current power supply conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217590611U (en) |
-
2022
- 2022-06-27 CN CN202221816435.XU patent/CN217590611U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201682417U (en) | Power supply protection circuit based on super capacitor | |
| CN201699585U (en) | Novel intelligent voltage stabilizing circuit | |
| CN104779795A (en) | High-gain direct-current boost converter based on improved impedance source | |
| CN104270085A (en) | DC/DC conversion circuit in solar photovoltaic power generation system | |
| CN217590611U (en) | Low-voltage large-current direct-current power supply conversion circuit | |
| CN101308392B (en) | Constant power output control circuit for communication power supply | |
| CN209767213U (en) | Super capacitor energy storage system and power management system based on super capacitor energy storage system | |
| CN219268725U (en) | Self-adaptive wide power input circuit for water quality sensor | |
| CN206602383U (en) | A kind of charged state cue circuit | |
| CN114977789A (en) | Low-voltage large-current direct-current power supply conversion circuit | |
| CN102024968B (en) | Module for prolonging operating service life of fuel battery and using method thereof | |
| CN201877515U (en) | Module for improving service life of fuel cell | |
| CN210037954U (en) | Power supply voltage overvoltage and undervoltage protection indicating circuit | |
| CN210111001U (en) | Heating circuit, aluminum substrate with same, battery pack and solar battery | |
| CN204517695U (en) | A kind of inverter | |
| CN110784003A (en) | Control circuit and control method of single-phase and three-phase compatible charger without electrolytic capacitor | |
| CN202997922U (en) | Auxiliary power supply used for switch power supply starting | |
| CN212572115U (en) | Multi-section efficient super capacitor charging and discharging management circuit suitable for TTU | |
| CN220822653U (en) | Dual-path step-down switching output circuit and lithium battery | |
| CN204190688U (en) | DC/DC translation circuit in a kind of solar photovoltaic generation system | |
| CN212367122U (en) | Power-on and power-off control device of energy storage inverter | |
| CN217427704U (en) | Photovoltaic power generation energy storage control circuit | |
| CN219576852U (en) | Novel voltage soft start circuit | |
| CN219436870U (en) | Isolation DC converter suitable for high-end, long-cruising and primary-level controlled electric motor car | |
| CN210348295U (en) | Novel voltage stabilizing module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |