CN203706129U - Power-on anti-impacting circuit of computer power circuit - Google Patents
Power-on anti-impacting circuit of computer power circuit Download PDFInfo
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- CN203706129U CN203706129U CN201420025368.9U CN201420025368U CN203706129U CN 203706129 U CN203706129 U CN 203706129U CN 201420025368 U CN201420025368 U CN 201420025368U CN 203706129 U CN203706129 U CN 203706129U
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Abstract
The utility model discloses a power-on anti-impacting circuit of a computer power circuit. The power-on anti-impacting circuit comprises an inductor L1, a rectifying diode BD1 and an MOS tube Q1, wherein the inductor L1, the rectifying diode BD1 and the MOS tube Q1are connected with one another, one end of the inductor L1 is connected with the cathode of the rectifying diode BD1, and the other end of the inductor L1 is connected with the output end of a bridge rectifying circuit in the computer power circuit; the drain electrode of the MOS tube Q1 is connected between the inductor L1 and the rectifying diode BD1, the source electrode of the MOS tube Q1 is grounded, and a capacitor C1 is arranged between the source electrode and the anode of the rectifying diode BD1. The power-on anti-impacting circuit further comprises a current shunt branch circuit which can reduce the surge current of the starting-up moment and prevent the rectifying diode BD1 from being damaged, the current shunt branch circuit is connected with one end of the inductor L1 and the rectifying diode BD1 in parallel, and the current shunt branch circuit comprises a diode and a current shunt resistor. The power-on anti-impacting circuit is simple in structure and capable of effectively reducing the surge current of the starting-up moment and reducing damage probability of the rectifying diode BD1, so that service life is prolonged.
Description
technical field:
The utility model relates to computer power circuit engineering field, refers in particular to a kind of Electrified anti-impact circuit of computer power circuit.
background technology:
Computer power is that 220V/110V alternating current is converted to direct current, and powers as parts such as mainboard, driver, video cards for computer fittings specially, and it is the hinge of the each parts power supply of computer, is the important component part of computer.
Along with social development; computer power requires efficiency more and more higher now; in order to raise the efficiency; conventionally thermistor in AC input end in computer power circuit can be cancelled, to reduce loss, but produce so again a problem; owing to there is no thermistor; start dash current is excessive, easily damages bridge rectifier, protective tube and the commutation diode etc. of AC voltage input end, so that shortens the serviceable life of computer power.
utility model content:
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of Electrified anti-impact circuit of computer power circuit is provided, this Electrified anti-impact circuit is simple in structure, it can effectively reduce the surge current of booting moment, reduce the damage probability of commutation diode BD1, to improve the life-span of whole computer power circuit.
In order to solve the problems of the technologies described above, the utility model has adopted following technical proposals: the Electrified anti-impact circuit of this computer power circuit comprises: interconnective inductance L 1, commutation diode BD1 and metal-oxide-semiconductor Q1, wherein, inductance L 1 one end is connected with the negative electrode of commutation diode BD1, the other end is connected with the output terminal of bridge rectifier circuit in computer power circuit, the drain electrode of metal-oxide-semiconductor Q1 is connected between inductance L 1 and commutation diode BD1, the source ground of metal-oxide-semiconductor Q1, and between the anode of this source electrode and commutation diode BD1, be provided with a capacitor C 1, this Electrified anti-impact circuit also comprises that one can reduce the surge current of booting moment, prevent the current distributing branch road that commutation diode BD1 damages, this current distributing branch road is in parallel with inductance L 1 one end and commutation diode BD1, and this current distributing branch road includes diode and shunt resistance.
Furthermore, in technique scheme, described diode comprises: first diode; Described shunt resistance comprises first shunt resistance, and wherein, the negative electrode of diode is connected with the output terminal of bridge rectifier circuit in computer power circuit, and shunt resistance two ends connect respectively the anode of diode and the anode of commutation diode BD1.
Furthermore, in technique scheme, described diode comprises: first diode; Described shunt resistance comprises first shunt resistance, and wherein, shunt resistance two ends connect respectively the output terminal of bridge rectifier circuit in the negative electrode of diode and computer power circuit, the anodic bonding of the anode of diode and commutation diode BD1.
Furthermore, in technique scheme, described diode comprises: the first diode and the first diode; Described shunt resistance comprises the first shunt resistance and the second shunt resistance, this first shunt resistance, the second shunt resistance, the first diode and the second diode are connected successively, wherein, the first shunt resistance connects the output terminal of described bridge rectifier circuit, the negative electrode and positive electrode of the first diode connects respectively the negative electrode of the second shunt resistance and the second diode, the anodic bonding of the anode of the second diode and commutation diode BD1.
Furthermore, in technique scheme, described diode comprises: the first diode and the first diode; Described shunt resistance comprises the first shunt resistance and the second shunt resistance, this first diode, the second diode, the first shunt resistance and the second shunt resistance are connected successively, wherein, the negative electrode and positive electrode of the first diode connects respectively the output terminal of described bridge rectifier circuit and the negative electrode of the second diode, and the second shunt resistance connects the anodic bonding of commutation diode BD1.
Furthermore, in technique scheme, described diode also comprises second diode; Described shunt resistance also comprises second shunt resistance, after this second diode and the series connection of the second shunt resistance, is connected in parallel on the first diode and the first shunt resistance.
Furthermore, in technique scheme, the anodic formation of the anode of described the first diode and the second diode is electrically connected.
Furthermore, in technique scheme, described diode also comprises second diode; Described shunt resistance also comprises second shunt resistance, after this second diode and the series connection of the second shunt resistance, is connected in parallel on the first diode and the first shunt resistance.
Furthermore, in technique scheme, the negative electrode of the negative electrode of described the first diode and the second diode forms and is electrically connected.
Adopt after technique scheme, the utility model has following beneficial effect compared with prior art: the course of work of the present utility model is: alternating current is through L, the input of N line, after 32 filtering of EMC filtering circuit and bridge rectifier circuit 1 rectification, become direct current, positive polarity is charged to capacitor C 1 through inductance L 1 and commutation diode BD1, other road first diode and the first shunt resistance charge to capacitor C 1, so that the first diode and the first shunt resistance have effectively been shared the surge current of commutation diode BD1, can reduce the surge current of booting moment, also reduced the damage probability of commutation diode BD1 simultaneously, to improve the life-span of whole computer power circuit.
brief description of the drawings:
Fig. 1 is the circuit diagram that computer power circuit of the present utility model is installed;
Fig. 2 is the circuit diagram of the utility model the first structure;
Fig. 3 is the circuit diagram of the utility model the second structure;
Fig. 4 is the circuit diagram of the utility model the 3rd structure;
Fig. 5 is the circuit diagram of the utility model the 4th structure;
Fig. 6 is the circuit diagram of the utility model the 5th structure;
Fig. 7 is the circuit diagram of the utility model the 6th structure;
Fig. 8 is the circuit diagram of the utility model the 7th structure;
Fig. 9 is the circuit diagram of the utility model the 8th structure;
embodiment:
Below in conjunction with specific embodiments and the drawings, the utility model is further illustrated.
Shown in Figure 1, for a kind of computer power circuit, it comprises: AC input end 31, EMC filtering circuit 32, bridge rectifier circuit 1, upper voltage anti-impact circuit 2, PFC control circuit 33, main-transformer 34, voltage follower circuit 35 and power management integrated circuit 39 and the energy-saving electric power load control circuit 36, computer power signal controlling 37, the modulating frequency and width control circuit 38 that are connected with power management integrated circuit 39 respectively.
In described AC input end 31, be provided with protective tube, described can export+12V of voltage follower circuit 35 ,-12V ,+5V, the voltage of+3.3V.
Described Electrified anti-impact circuit, it comprises: interconnective inductance L 1, commutation diode BD1, metal-oxide-semiconductor Q1 and one can reduce the surge current of booting moment, prevents the current distributing branch road 20 that commutation diode BD1 damages.Wherein, inductance L 1 one end is connected with the negative electrode of commutation diode BD1, the other end is connected with the output terminal of bridge rectifier circuit 1 in computer power circuit, the drain electrode of metal-oxide-semiconductor Q1 is connected between inductance L 1 and commutation diode BD1, the source ground of metal-oxide-semiconductor Q1, and be provided with a capacitor C 1 between this source electrode and the anode of commutation diode BD1.
Described current distributing branch road 20 is in parallel with inductance L 1 one end and commutation diode BD1, and this current distributing branch road 20 includes diode and shunt resistance.
Particularly, current distributing branch road 20 comprises following eight kinds of structures:
The first structure: shown in Fig. 2, described diode comprises: first diode 21; Described shunt resistance comprises first shunt resistance 23, and wherein, the negative electrode of diode is connected with the output terminal of bridge rectifier circuit 1 in computer power circuit, and shunt resistance two ends connect respectively the anode of diode and the anode of commutation diode BD1.
The second structure: shown in Fig. 3, described diode comprises: first diode 21; Described shunt resistance comprises first shunt resistance 23, and wherein, shunt resistance two ends connect respectively the output terminal of bridge rectifier circuit 1 in the negative electrode of diode and computer power circuit, the anodic bonding of the anode of diode and commutation diode BD1.
The third structure: shown in Fig. 4, described diode comprises: the first diode 21 and the first diode 21; Described shunt resistance comprises the first shunt resistance 23 and the second shunt resistance 24, this first shunt resistance 23, the second shunt resistance 24, the first diode 21 and the second diode 22 are connected successively, wherein, the first shunt resistance 23 connects the output terminal of described bridge rectifier circuit 1, the negative electrode and positive electrode of the first diode 21 connects respectively the negative electrode of the second shunt resistance 24 and the second diode 22, the anodic bonding of the anode of the second diode 22 and commutation diode BD1.
The 4th kind of structure: shown in Fig. 5, described diode comprises: the first diode 21 and the first diode 21; Described shunt resistance comprises the first shunt resistance 23 and the second shunt resistance 24, this first diode 21, the second diode 22, the first shunt resistance 23 and the second shunt resistance 24 are connected successively, wherein, the negative electrode and positive electrode of the first diode 21 connects respectively the output terminal of described bridge rectifier circuit 1 and the negative electrode of the second diode 22, and the second shunt resistance 24 connects the anodic bonding of commutation diode BD1.
The 5th kind of structure: shown in Fig. 6, it is on the basis of the first structure, to increase by second diode 22 and second shunt resistance 24, after this second diode 22 and the second shunt resistance 24 series connection, is connected in parallel on the first diode 21 and the first shunt resistance 23.
The 6th kind of structure: shown in Fig. 7, it is on the basis of the 5th kind of structure, the anodic formation of the anode of described the first diode 21 and the second diode 22 to be electrically connected, and makes the first diode 21, the first shunt resistance 23, the second diode 22, the second shunt resistance 24 form a H bridge construction.
The 7th kind of structure: shown in Fig. 8, it is on the basis of the second structure, to increase by second diode 22 and second shunt resistance 24, after this second diode 22 and the second shunt resistance 24 series connection, is connected in parallel on the first diode 21 and the first shunt resistance 23.
The 8th kind of structure: shown in Fig. 9, it is on the basis of the 5th kind of structure, the negative electrode of the negative electrode of described the first diode 21 and the second diode 22 to be formed and is electrically connected, and makes the first diode 21, the first shunt resistance 23, the second diode 22, the second shunt resistance 24 form a H bridge construction.
In the present embodiment, current distributing branch road 20 adopts the first structure, the course of work is: alternating current is through L, the input of N line, after 32 filtering of EMC filtering circuit and bridge rectifier circuit 1 rectification, become direct current, positive polarity is charged to capacitor C 1 through inductance L 1 and commutation diode BD1, other road first diode 21 and the first shunt resistance 23 charge to capacitor C 1, so that the first diode 21 and the first shunt resistance 23 have effectively been shared the surge current of commutation diode BD1, can reduce the surge current of booting moment, also reduced the damage probability of commutation diode BD1 simultaneously, to improve the life-span of whole computer power circuit.
Certainly, the foregoing is only specific embodiment of the utility model, be not to limit the utility model practical range, all according to equivalence variation or modification that described in the utility model claim, structure, feature and principle are done, all should be included in the utility model claim.
Claims (9)
1. the Electrified anti-impact circuit of computer power circuit, it comprises: interconnective inductance L 1, commutation diode BD1 and metal-oxide-semiconductor Q1, wherein, inductance L 1 one end is connected with the negative electrode of commutation diode BD1, the other end is connected with the output terminal of bridge rectifier circuit (1) in computer power circuit, the drain electrode of metal-oxide-semiconductor Q1 is connected between inductance L 1 and commutation diode BD1, the source ground of metal-oxide-semiconductor Q1, and between the anode of this source electrode and commutation diode BD1, be provided with a capacitor C 1, it is characterized in that: also comprise that one can reduce the surge current of booting moment, prevent the current distributing branch road (20) that commutation diode BD1 damages, this current distributing branch road (20) is in parallel with inductance L 1 one end and commutation diode BD1, and this current distributing branch road (20) includes diode and shunt resistance.
2. the Electrified anti-impact circuit of computer power circuit according to claim 1, is characterized in that: described diode comprises: first diode (21); Described shunt resistance comprises first shunt resistance (23), and wherein, the negative electrode of diode is connected with the output terminal of bridge rectifier circuit (1) in computer power circuit, and shunt resistance two ends connect respectively the anode of diode and the anode of commutation diode BD1.
3. the Electrified anti-impact circuit of computer power circuit according to claim 1, is characterized in that: described diode comprises: first diode (21); Described shunt resistance comprises first shunt resistance (23), and wherein, shunt resistance two ends connect respectively the output terminal of bridge rectifier circuit (1) in the negative electrode of diode and computer power circuit, the anodic bonding of the anode of diode and commutation diode BD1.
4. the Electrified anti-impact circuit of computer power circuit according to claim 1, is characterized in that: described diode comprises: the first diode (21) and the first diode (21); Described shunt resistance comprises the first shunt resistance (23) and the second shunt resistance (24), this first shunt resistance (23), the second shunt resistance (24), the first diode (21) and the second diode (22) are connected successively, wherein, the first shunt resistance (23) connects the output terminal of described bridge rectifier circuit (1), the negative electrode and positive electrode of the first diode (21) connects respectively the negative electrode of the second shunt resistance (24) and the second diode (22), the anode of the second diode (22) and the anodic bonding of commutation diode BD1.
5. the Electrified anti-impact circuit of computer power circuit according to claim 1, is characterized in that: described diode comprises: the first diode (21) and the first diode (21); Described shunt resistance comprises the first shunt resistance (23) and the second shunt resistance (24), this first diode (21), the second diode (22), the first shunt resistance (23) and the second shunt resistance (24) are connected successively, wherein, the negative electrode and positive electrode of the first diode (21) connects respectively the output terminal of described bridge rectifier circuit (1) and the negative electrode of the second diode (22), and the second shunt resistance (24) connects the anodic bonding of commutation diode BD1.
6. the Electrified anti-impact circuit of computer power circuit according to claim 2, is characterized in that: described diode also comprises second diode (22); Described shunt resistance also comprises second shunt resistance (24), after this second diode (22) and the second shunt resistance (24) series connection, is connected in parallel on the first diode (21) and the first shunt resistance (23).
7. the Electrified anti-impact circuit of computer power circuit according to claim 6, is characterized in that: the anodic formation of the anode of described the first diode (21) and the second diode (22) is electrically connected.
8. the Electrified anti-impact circuit of computer power circuit according to claim 3, is characterized in that: described diode also comprises second diode (22); Described shunt resistance also comprises second shunt resistance (24), after this second diode (22) and the second shunt resistance (24) series connection, is connected in parallel on the first diode (21) and the first shunt resistance (23).
9. the Electrified anti-impact circuit of computer power circuit according to claim 8, is characterized in that: the negative electrode of the negative electrode of described the first diode (21) and the second diode (22) forms and is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420025368.9U CN203706129U (en) | 2014-01-16 | 2014-01-16 | Power-on anti-impacting circuit of computer power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420025368.9U CN203706129U (en) | 2014-01-16 | 2014-01-16 | Power-on anti-impacting circuit of computer power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203706129U true CN203706129U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420025368.9U Expired - Fee Related CN203706129U (en) | 2014-01-16 | 2014-01-16 | Power-on anti-impacting circuit of computer power circuit |
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| CN (1) | CN203706129U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016192448A1 (en) * | 2015-06-03 | 2016-12-08 | 中兴通讯股份有限公司 | Silicon carbide diode anti-surge apparatus |
-
2014
- 2014-01-16 CN CN201420025368.9U patent/CN203706129U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016192448A1 (en) * | 2015-06-03 | 2016-12-08 | 中兴通讯股份有限公司 | Silicon carbide diode anti-surge apparatus |
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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: 20140709 Termination date: 20170116 |