CN213817579U - Novel starting circuit - Google Patents
Novel starting circuit Download PDFInfo
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- CN213817579U CN213817579U CN202022798235.3U CN202022798235U CN213817579U CN 213817579 U CN213817579 U CN 213817579U CN 202022798235 U CN202022798235 U CN 202022798235U CN 213817579 U CN213817579 U CN 213817579U
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Abstract
The utility model discloses a novel starting circuit; the input end is connected with a filter X capacitor, the input end is electrically connected with an input rectifier bridge, a first resistor and a second resistor are respectively and electrically connected between the filter X capacitor and the input rectifier bridge, one end of the first resistor is electrically connected with a first capacitor, one end of the second resistor is electrically connected with a second capacitor, one ends of the first capacitor and the second capacitor are electrically connected with a resistance-capacitance step-down rectifier bridge, one end of the resistance-capacitance step-down rectifier bridge is electrically connected with a voltage management chip, one side of the voltage management chip is electrically connected with a VCC power supply filter capacitor, and one side of the VCC power supply filter capacitor is connected with a VCC auxiliary power supply winding in parallel; the utility model discloses a resistance-capacitance voltage reduction circuit does control chip starting voltage, and resistance-capacitance voltage reduction circuit closes after the start-up, makes the no-load consumption of power reduce.
Description
Technical Field
The utility model belongs to the technical field of the starting circuit, concretely relates to novel starting circuit.
Background
The starting circuit is widely applied to the technical field of electronics. In the application of the switching power supply, whether a DC-DC converter or an AC-DC converter, the product needs to obtain a stable direct current starting power supply (such as Vcc) from a wide range of input voltage, and supply power to a control IC (also called a chip) or a control circuit, and then the control circuit drives an electronic switch, and the electronic switch controls an inductive component to periodically deliver power to an output end, however, various starting circuits in the market still have various problems.
As shown in fig. 1, in a starting circuit in the prior art, a conventional starting circuit controls a chip VCC pull-up resistor R, and the pull-up resistor R always has current after starting, which affects no-load power consumption of a power supply.
Disclosure of Invention
An object of the utility model is to provide a novel starting circuit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel starting circuit, includes the input, be connected with filtering X electric capacity on the input, the last electric connection of input has the input rectifier bridge, filtering X electric capacity with between the input rectifier bridge respectively electric connection have first resistance and second resistance, the one end electric connection of first resistance has first electric capacity, the one end electric connection of second resistance has the second electric capacity, first electric capacity with the one end electric connection of second electric capacity has resistance-capacitance step-down rectifier bridge, the one end electric connection of resistance-capacitance step-down rectifier bridge has the voltage management chip, one side electric connection of voltage management chip has VCC power supply filtering electric capacity, VCC power supply filtering electric capacity's one side is parallelly connected with VCC auxiliary power supply winding, electric connection has VCC auxiliary power supply rectifier resistor on the VCC auxiliary power supply winding.
Preferably, one side of the input rectifier bridge is electrically connected with an input direct current filter capacitor, and one end of the input direct current filter capacitor is grounded.
Preferably, the first resistor is connected in series with the first capacitor, and the first resistor is electrically connected to the N-terminal of the input terminal.
Preferably, the second resistor is connected in series with the second capacitor, and the second resistor is electrically connected to the L terminal of the input terminal.
Preferably, one end of the resistance-capacitance step-down rectifier bridge is grounded.
Preferably, the VCC power supply filter capacitor and one end of the VCC auxiliary power supply winding are grounded.
Preferably, the types and specifications of four groups of resistors in the input rectifier bridge are the same, and the specifications of four groups of resistor signals in the resistance-capacitance step-down rectifier bridge are the same.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a starting circuit adopts resistance-capacitance step-down circuit to do control chip starting voltage, and the resistance-capacitance step-down circuit closes after the start-up, makes the no-load consumption of power reduce.
Drawings
FIG. 1 is a schematic diagram of a prior art start-up circuit;
fig. 2 is a schematic diagram of the improved starting circuit of the present invention.
In the figure: 1. an input end; 2. a filter X capacitor; 3. an input rectifier bridge; 4. inputting a direct current filter capacitor; 5. a first resistor; 6. a first capacitor; 7. a second resistor; 8. a second capacitor; 9. a resistance-capacitance step-down rectifier bridge; 10. a voltage management chip; 11. a VCC power supply filter capacitor; 12. VCC auxiliary power supply rectifier resistor; 13. VCC assists the power supply winding.
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.
Referring to fig. 2, the present invention provides a technical solution: the utility model provides a novel starting circuit, including input 1, input 1 is last and be connected with filtering X electric capacity 2, input 1's last electric connection has input rectifier bridge 3, there are first resistance 5 and second resistance 7 between filtering X electric capacity 2 and the input rectifier bridge 3 respectively electric connection, the one end electric connection of first resistance 5 has first electric capacity 6, the one end electric connection of second resistance 7 has second electric capacity 8, the one end electric connection of first electric capacity 6 and second electric capacity 8 has resistance-capacitance step-down rectifier bridge 9, the one end electric connection of resistance-capacitance step-down rectifier bridge 9 has voltage management chip 10, one side electric connection of voltage management chip 10 has VCC power supply filter electric capacity 11, VCC power supply filter electric capacity 11's one side is parallelly connected with VCC auxiliary power supply winding 13, the electric connection has VCC auxiliary power supply rectifier resistance 12 on the VCC auxiliary power supply winding 13.
When in use, the input end 1 of the novel starting circuit is connected with the second resistor 7 and the second capacitor 8 through the L line, and a first resistor 5 and a first capacitor 6 connected with the input end N line realize the power supply of the resistance-capacitance step-down rectifier bridge 9, the resistance-capacitance step-down rectifier bridge 9 converts the alternating voltage, so that the alternating voltage is converted into direct current, then, the power is supplied to the VCC power supply filter capacitor 11, so that the VCC power supply filter capacitor 11 can supply power to the voltage management chip 10 after being fully charged, after the voltage management chip 10 can normally operate, the voltage management chip 10 is powered through the VCC auxiliary power supply winding 13, and at the moment, the resistance-capacitance step-down rectifier bridge 9, the first resistor 5, the first capacitor 6, the second resistor 7 and the second capacitor 8 stop supplying power, and compared with the attached drawing 1, the resistance-capacitance step-down circuit can be turned off after starting, so that the no-load power consumption of the power supply is reduced.
In order to filter and remove the dc wave, in this embodiment, preferably, an input dc filter capacitor 4 is electrically connected to one side of the input rectifier bridge 3, and one end of the input dc filter capacitor 4 is grounded.
In order to achieve the effective voltage reduction effect and the effect of filtering the dc wave, in this embodiment, preferably, the first resistor 5 is connected in series with the first capacitor 6, the first resistor 5 is electrically connected to the N terminal of the input terminal 1, the second resistor 7 is connected in series with the second capacitor 8, and the second resistor 7 is electrically connected to the L terminal of the input terminal 1.
In order to maintain stable operation of the rc-configured step-down rectifier bridge 9, in this embodiment, preferably, one end of the rc-configured step-down rectifier bridge 9 is grounded.
In order to protect the power supply circuit and the voltage management chip 10, in this embodiment, it is preferable that one end of the VCC power supply filter capacitor 11 and one end of the VCC auxiliary power supply winding 13 are grounded.
In order to enable the rectifier bridge to keep stable operation without circuit loss, in this embodiment, preferably, the specifications of four sets of resistors in the input rectifier bridge 3 are the same, and the specifications of four sets of resistor signals in the resistance-capacitance step-down rectifier bridge 9 are the same.
The utility model discloses a theory of operation: when in use, the input end 1 of the novel starting circuit is connected with the second resistor 7 and the second capacitor 8 through the L line, and a first resistor 5 and a first capacitor 6 connected with the input end N line realize the power supply of the resistance-capacitance step-down rectifier bridge 9, the resistance-capacitance step-down rectifier bridge 9 converts the alternating voltage, so that the alternating voltage is converted into direct current, then, the power is supplied to the VCC power supply filter capacitor 11, so that the VCC power supply filter capacitor 11 can supply power to the voltage management chip 10 after being fully charged, after the voltage management chip 10 can normally operate, the voltage management chip 10 is powered through the VCC auxiliary power supply winding 13, and at the moment, the resistance-capacitance step-down rectifier bridge 9, the first resistor 5, the first capacitor 6, the second resistor 7 and the second capacitor 8 stop supplying power, and compared with the attached drawing 1, the resistance-capacitance step-down circuit can be turned off after starting, so that the no-load power consumption of the power supply is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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. A novel starting circuit comprises an input end (1), and is characterized in that: the input end (1) is connected with a filter X capacitor (2), the input end (1) is electrically connected with an input rectifier bridge (3), a first resistor (5) and a second resistor (7) are respectively and electrically connected between the filter X capacitor (2) and the input rectifier bridge (3), one end of the first resistor (5) is electrically connected with a first capacitor (6), one end of the second resistor (7) is electrically connected with a second capacitor (8), one ends of the first capacitor (6) and the second capacitor (8) are electrically connected with a resistance-capacitance step-down rectifier bridge (9), one end of the resistance-capacitance step-down rectifier bridge (9) is electrically connected with a voltage management chip (10), one side of the voltage management chip (10) is electrically connected with a VCC power supply filter capacitor (11), one side of the VCC power supply filter capacitor (11) is connected with a VCC auxiliary power supply winding (13) in parallel, and the VCC auxiliary power supply winding (13) is electrically connected with a VCC auxiliary power supply rectifying resistor (12).
2. The novel startup circuit of claim 1, wherein: one side of the input rectifier bridge (3) is electrically connected with an input direct current filter capacitor (4), and one end of the input direct current filter capacitor (4) is grounded.
3. The novel startup circuit of claim 1, wherein: the first resistor (5) is connected with the first capacitor (6) in series, and the first resistor (5) is electrically connected to the N end of the input end (1).
4. The novel startup circuit of claim 1, wherein: the second resistor (7) is connected with the second capacitor (8) in series, and the second resistor (7) is electrically connected to the L end of the input end (1).
5. The novel startup circuit of claim 1, wherein: one end of the resistance-capacitance step-down rectifier bridge (9) is grounded.
6. The novel startup circuit of claim 1, wherein: and one end of the VCC power supply filter capacitor (11) and one end of the VCC auxiliary power supply winding (13) are grounded.
7. The novel startup circuit of claim 1, wherein: the four groups of resistors in the input rectifier bridge (3) are same in model and specification, and the four groups of resistors in the resistance-capacitance step-down rectifier bridge (9) are same in signal specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022798235.3U CN213817579U (en) | 2020-11-27 | 2020-11-27 | Novel starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022798235.3U CN213817579U (en) | 2020-11-27 | 2020-11-27 | Novel starting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213817579U true CN213817579U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022798235.3U Active CN213817579U (en) | 2020-11-27 | 2020-11-27 | Novel starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213817579U (en) |
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2020
- 2020-11-27 CN CN202022798235.3U patent/CN213817579U/en active Active
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