CN204013205U - A kind of bridge rectifier of anti-overflow with and bleeder circuit - Google Patents
A kind of bridge rectifier of anti-overflow with and bleeder circuit Download PDFInfo
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- CN204013205U CN204013205U CN201420474230.7U CN201420474230U CN204013205U CN 204013205 U CN204013205 U CN 204013205U CN 201420474230 U CN201420474230 U CN 201420474230U CN 204013205 U CN204013205 U CN 204013205U
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Abstract
The bridge rectifier that the utility model discloses a kind of anti-overflow with and bleeder circuit, bleeder circuit is encapsulated in SOT-23-6 encapsulation, in encapsulation, be provided with the first, second, third, fourth, the 5th, the 6th pin, it comprises: the first earial drainage protection switch group, one end is coupled to the first pin, and the other end is coupled to the 6th pin; The second earial drainage protection switch group, one end is coupled to three-prong, and the other end is coupled to the 4th pin; Also comprise transformer and two brachium pontis, described brachium pontis comprises: rectifier switch circuit, be parallel on transformer secondary winding, and one is terminated at transformer secondary Motor Winding Same Name of Ends, and another termination secondary winding different name end, for realizing circuit rectification; Above-mentioned bleeder circuit, is parallel on transformer secondary winding equally, and one is terminated at transformer secondary Motor Winding Same Name of Ends, and another termination secondary winding different name end, for the protection of rectifier diode, coordinates rectifier diode to form rectifier bridge simultaneously.So, by one group of TVS pipe belt, for common rectifier diode, can realize the overcurrent protection of rectifier diode.
Description
Technical field
The utility model relates to a kind of bridge rectifier, more particularly, the bridge rectifier that it relates to a kind of anti-overflow with and bleeder circuit.
Background technology
Rectification circuit (rectifying circuit) is converted to AC energy in the circuit of direct current energy.The compositions such as most of rectified current routing transformers, rectification main circuit and filter.It is used widely in fields such as the speed governing of DC motor, the excitation regulation of generator, electrolysis, plating.Rectification circuit is comprised of main circuit, filter and transformer conventionally.After 20 century 70s, the multiplex silicon rectifier diode of main circuit and thyristor form.Filter is connected between main circuit and load, for the alternating component of filtering pulsating dc voltage.Whether transformer setting is determined on a case-by-case basis.The effect of transformer be realize between AC-input voltage and VD mate and AC network and rectification circuit between electricity isolation.
Bridge rectifier is to use maximum a kind of rectification circuits.Sort circuit, is comprised of a transformer (comprising former limit winding, secondary winding and iron core) and two brachium pontis (comprising two pairs of rectifier diodes), can realize full-wave rectification, and has overcome to a certain extent the shortcoming of halfwave rectifier simultaneously.
The rectification circuit bridge rectifier of application is in the majority in the market, but bridge rectifier diode used generally is rectifier diode, face junction type, so junction capacitance is larger, is generally below 3kHZ.High backward voltage is from totally 22 grades of 25 volts to 3000 volts minutes A～X.Be classified as follows: 1. Si semiconductor rectifier diode 2CZ type, 2. silicon dridge type rectifier QL type, 3. for the 2CLG type of the nearly 100KHz of TV set high-voltage silicon stack operating frequency.Although but the above adaptable operating frequency of three kinds is very high, when there is larger current spike or surge current, may cause diode to burn out.
Utility model content
The deficiency existing for prior art, the bridge rectifier that the purpose of this utility model is to provide a kind of anti-overflow with and bleeder circuit.
For achieving the above object, the utility model provides following technical scheme: a kind of bleeder circuit, be encapsulated in SOT-23-6 encapsulation, and in encapsulation, be provided with the first, second, third, fourth, the 5th, the 6th pin, it comprises:
The first earial drainage protection switch group, one end is coupled to the first pin, and the other end is coupled to the 6th pin;
The second earial drainage protection switch group, one end is coupled to three-prong, and the other end is coupled to the 4th pin;
So, while there is no peak current or surge current in circuit, can do common full-bridge rectification switches set uses, while having peak current or surge current in circuit, can play the effect of earial drainage, be encapsulated in a chip simultaneously, can, using this bleeder circuit dismounting wiring more flexible, have also greatly improved production efficiency.
For achieving the above object, the utility model provides following technical scheme: a kind of bridge rectifier of anti-overflow, is characterized in that:
Rectifier switch circuit, is parallel on transformer secondary winding, and one is terminated at transformer secondary Motor Winding Same Name of Ends, and another termination secondary winding different name end, for realizing circuit rectification.
Above-mentioned any one bleeder circuit, is parallel on transformer secondary winding equally, and one is terminated at transformer secondary Motor Winding Same Name of Ends, and another termination secondary winding different name end, for the protection of rectifier diode, coordinates rectifier diode to form rectifier bridge simultaneously.
So, while normally working, wherein bleeder circuit can be used as switching circuit use, and the work of auxiliary rectifier switching circuit occurs current spike or surge current in circuit, as bleeder circuit, uses, and just can realize the effect of earial drainage.
In one embodiment, the first rectifier diode anode can be coupled to transformer secondary Motor Winding Same Name of Ends, its anode is also coupled to the 6th pin; The second rectifier diode negative electrode can be coupled to the first rectifier diode negative electrode, its anode is coupled to transformer secondary winding different name end, and its anode is also coupled to the first pin.One group of earial drainage protection switch group is set, when playing rectified action, also other two pairs of diodes in full-bridge circuit is played a protective role.
In one embodiment, the 3rd rectifier diode anode can be coupled to transformer secondary Motor Winding Same Name of Ends, its anode is also coupled to the 4th pin; The 4th rectifier diode negative electrode can be coupled to the 3rd rectifier diode negative electrode, its anode is coupled to transformer secondary winding different name end, and its anode is also coupled to three-prong.If the first earial drainage protection switch group is damaged, can use the same method and say two rectifier diode access second switch groups in rectification circuit.
In one embodiment, the first rectifier diode anode can be coupled to transformer secondary Motor Winding Same Name of Ends, its anode is also coupled to the 6th pin and the 4th pin; The second rectifier diode negative electrode can be coupled to the first rectifier diode negative electrode, its anode is coupled to transformer secondary winding different name end, and its anode is also coupled to the first pin and three-prong.Can also arrange first, second earial drainage protection switch group is accessed in rectification circuit simultaneously, play better protection effect, when a protection switch group lost efficacy, another can directly use.
The utility model can also further be set to: described the first earial drainage protection switch group comprises:
The one TVS pipe, its negative electrode is connected to the first pin, and its anode is connected to the second pin, and its anode is also connected to the 5th pin;
The 2nd TVS pipe, its negative electrode is connected to the 6th pin, and its anode is connected to a TVS tube anode;
Described the second earial drainage protection switch group comprises:
The 3rd TVS pipe, its negative electrode is connected to three-prong, and its anode is connected to the second pin, and its anode is also connected to the 5th pin;
The 4th TVS pipe, its negative electrode is connected to the 4th pin, and its anode is connected to the 3rd TVS tube anode.
When the two poles of the earth of TVS diode are subject to reverse transient state high energy impact events; it can be with the speed of 10-12 second-time; the high impedance of its two interpolar is become to Low ESR; the surge power of absorption up to thousands of watts; make the voltage clamping of two interpolars in a predetermined value, the rectifier switch circuit in protective circuit can not burn out effectively.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the utility model embodiment 1;
Fig. 2 is the circuit structure diagram of the utility model embodiment 2;
Fig. 3 is the circuit structure diagram of the utility model embodiment 3;
Fig. 4 is the circuit structure diagram of the utility model embodiment 4.
Reference numeral: 1-6, six pins of encapsulation; 7, rectifier switch circuit; 8, bleeder circuit; D1, a TVS pipe; D2, the 2nd TVS pipe; D3, the 3rd TVS pipe; D4, the 4th TVS pipe; D5, the first rectifier diode; D6, the second rectifier diode; D7, the 3rd rectifier diode; D8, the 4th rectifier diode.
Embodiment
Referring to figs. 1 through Fig. 4, the bridge rectifier of the new a kind of anti-overflow of this practicality and bleeder circuit encapsulation embodiment thereof are described further.
Shown in Fig. 1, embodiment 1 is:
Encapsulation is provided with six pins, and numbering is respectively 1-6 respectively.
Encapsulation internal circuit: pin one is connected to a TVS pipe D1 negative electrode, and the anode of a TVS pipe D1 is connected to pin two and pin 5, and its anode is also connected to the anode of the 2nd TVS pipe D2, and the negative electrode of the 2nd TVS pipe D2 is connected to pin 6, forms the first earial drainage protection switch group.Pin 3 is connected to the 3rd TVS pipe D3 negative electrode, and the anode of the 3rd TVS pipe D3 is connected to pin two and pin 5, and its anode is also connected to the anode of the 4th TVS pipe D4, and the negative electrode of the 4th TVS pipe D4 is connected to pin 4,
Form the second earial drainage protection switch group.
Package outside circuit: the first rectifier diode D5 anode is connected to respectively transformer secondary Motor Winding Same Name of Ends and package outside pin 6, its negative electrode is connected to respectively one end of the second rectifier diode D6 negative electrode and rectifier output voltage, the rectifier output voltage other end is connected to pin 5, the second rectifier diode D6 anodes and is connected to respectively transformer secondary winding different name end and package outside pin one.
So by a TVS pipe D1 and the first rectifier diode D5, formed the forward brachium pontis of rectification circuit; The 2nd TVS pipe D2 and the second rectifier diode D6 have formed the reverse brachium pontis of rectification circuit.
The operation principle of bridge rectifier is as follows: when E2 is positive half cycle, to D1, D5 and direction voltage, Dl, D5 conducting; D2, D6 are added to reverse voltage, D2, D6 cut-off.In circuit, form E2, Dl, U, D5 power circuit, on U, form just lower negative halfwave rectifier voltage, when E2 is negative half period, D2, D6 are added to forward voltage, D2, D6 conducting; D1, D5 are added to reverse voltage, D1, D5 cut-off.In circuit, form E2, D2, U, D6 power circuit, on U, form equally the commutating voltage of just lower negative other half-wave.
So in loop, there is current spike or excessive surge current; in circuit, TVS pipe is because cathode voltage is obviously greater than anode voltage; the conducting of meeting snap back, completes earial drainage function, thereby has protected rectifier diode to burn out because circuit is excessive.
Embodiment 2 is:
Shown in Fig. 2, encapsulation internal structure is identical with embodiment 1;
Package outside circuit: the 3rd rectifier diode D7 anode is connected to respectively transformer secondary Motor Winding Same Name of Ends and package outside pin 4, its negative electrode is connected to respectively one end of the 4th rectifier diode D8 negative electrode and rectifier output voltage, the rectifier output voltage other end is connected to pin 5, the four rectifier diode D8 anodes and is connected to respectively transformer secondary winding different name end and package outside pin 3.
So by the 3rd TVS pipe D3 and the 3rd rectifier diode D7, formed the forward brachium pontis of rectification circuit; The 4th TVS pipe D4 and the 4th rectifier diode D8 have formed the reverse brachium pontis of rectification circuit.
The operation principle of bridge rectifier is as follows: when E2 is positive half cycle, to D3, D7 and direction voltage, D3, D7 conducting; D4, D8 are added to reverse voltage, D4, D8 cut-off.In circuit, form E2, D3, U, D7 power circuit, on U, form just lower negative halfwave rectifier voltage, when E2 is negative half period, D4, D8 are added to forward voltage, D4, D8 conducting;
D3, D7 are added to reverse voltage, D3, D7 cut-off.In circuit, form E2, D4, U, D8 power circuit, on U, form equally the commutating voltage of just lower negative other half-wave.
Just in case a damage in D1 or D2, can also play the identical effect with embodiment 1 equally by the connection shown in embodiment 2.
Shown in Fig. 3, embodiment 3 is: on the basis of embodiment 1, added one group of protection TVS diode.
Encapsulation internal structure is identical with embodiment 1;
The difference of package outside circuit is: the first described rectifier diode anode is also connected to pin 4, and the second described rectifier diode anode is also connected to pin 3.
Added one group of TVS pipe, its normal work limitation fruit is constant.
With the difference of embodiment 1 be, two TVS pipes are worked simultaneously, can make the earial drainage time shorter, effect is faster, can also manage default voltage stabilizing value difference by TVS, realize the effect of classification earial drainage, and when a TVS pipe damages, because the TVS adding pipe is that parallel connection and direction are identical with it, whole circuit still can continue operation.
Shown in Fig. 4, embodiment 4 is: on the basis of embodiment 2, added one group of protection TVS diode.
Encapsulation internal structure is identical with embodiment 2;
The difference of package outside circuit is: the first described rectifier diode anode is also connected to pin 6, and the second described rectifier diode anode is also connected to pin one.
Added one group of TVS pipe, its normal work limitation fruit is constant.
With the difference of embodiment 2 be, two TVS pipes are worked simultaneously, can make the earial drainage time shorter, and effect is faster,
Can also manage default voltage stabilizing value difference by TVS, realize the effect of classification earial drainage, and when a TVS pipe damages,
Because the TVS adding pipe is that parallel connection and direction are identical with it, whole circuit still can continue operation.
Above four kinds of embodiment can play a good protective effect to rectifier diode when there is current spike and excessive surge current.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (8)
1. a bleeder circuit, is characterized in that: be encapsulated in SOT-23-6 encapsulation, be provided with the first, second, third, fourth, the 5th, the 6th pin in encapsulation, it comprises:
The first earial drainage protection switch group, one end is coupled to the first pin, and the other end is coupled to the 6th pin;
The second earial drainage protection switch group, one end is coupled to three-prong, and the other end is coupled to the 4th pin;
Wherein, while there is no peak current or surge current in circuit; the first earial drainage protection switch group and the second earial drainage protection switch group are common full-bridge rectification switches set; while having peak current or surge current in circuit; the first earial drainage protection switch group and the protection of the second earial drainage change on off state, play the effect of earial drainage.
2. bleeder circuit according to claim 1, is characterized in that: described the first earial drainage protection switch group comprises:
The one TVS pipe, its negative electrode is coupled to the first pin, and its anode is coupled to the second pin, and its anode is also coupled to the 5th pin; The 2nd TVS pipe, its negative electrode is coupled to the 6th pin, and its anode is coupled to a TVS tube anode.
3. bleeder circuit according to claim 1, is characterized in that: described the second earial drainage protection switch group comprises:
The 3rd TVS pipe, its negative electrode is coupled to three-prong, and its anode is coupled to the second pin, and its anode is also coupled to the 5th pin; The 4th TVS pipe, its negative electrode is coupled to the 4th pin, and its anode is coupled to the 3rd TVS tube anode.
4. the bridge rectifier of an anti-overflow, comprise transformer and two brachium pontis, it is characterized in that: described two brachium pontis comprise: rectifier switch circuit, be parallel on transformer secondary winding, its one end is coupled to transformer secondary Motor Winding Same Name of Ends, the other end couples secondary winding different name end, for realizing circuit rectification;
Bleeder circuit as described in claim 1 to 3 any one; be parallel to equally on transformer secondary winding, its one end is coupled to transformer secondary Motor Winding Same Name of Ends, and the other end couples secondary winding different name end; for the protection of rectifier diode, coordinate rectifier diode to form full-bridge rectification bridge simultaneously.
5. the bridge rectifier of a kind of anti-overflow according to claim 4, is characterized in that: described rectifier switch circuit comprises:
The first rectifier diode, its anode is coupled to transformer secondary Motor Winding Same Name of Ends, and its anode is also coupled to the 6th pin;
The second rectifier diode, its negative electrode is coupled to the first rectifier diode negative electrode, and its anode is coupled to transformer secondary winding different name end, and its anode is also coupled to the first pin.
6. the bridge rectifier of a kind of anti-overflow according to claim 4, is characterized in that: described rectifier switch circuit comprises:
The 3rd rectifier diode, its anode is coupled to transformer secondary Motor Winding Same Name of Ends, and its anode is also coupled to the 4th pin;
The 4th rectifier diode, its negative electrode is coupled to the 3rd rectifier diode negative electrode, and its anode is coupled to transformer secondary winding different name end, and its anode is also coupled to three-prong.
7. the bridge rectifier of a kind of anti-overflow according to claim 5, is characterized in that: described its anode of the first rectifier diode is also coupled to the 4th pin, and described its anode of the second rectifier diode is also coupled to three-prong.
8. the bridge rectifier of a kind of anti-overflow according to claim 6, is characterized in that: described the 3rd its anode of rectifier diode is also coupled to the first pin, and described the 4th its anode of rectifier diode is also coupled to the 6th pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474230.7U CN204013205U (en) | 2014-08-21 | 2014-08-21 | A kind of bridge rectifier of anti-overflow with and bleeder circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474230.7U CN204013205U (en) | 2014-08-21 | 2014-08-21 | A kind of bridge rectifier of anti-overflow with and bleeder circuit |
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| CN204013205U true CN204013205U (en) | 2014-12-10 |
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| CN201420474230.7U Expired - Fee Related CN204013205U (en) | 2014-08-21 | 2014-08-21 | A kind of bridge rectifier of anti-overflow with and bleeder circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682731A (en) * | 2015-03-11 | 2015-06-03 | 禾邦电子（中国）有限公司 | Protection type bridge rectifier circuit and module comprising the same |
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2014
- 2014-08-21 CN CN201420474230.7U patent/CN204013205U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682731A (en) * | 2015-03-11 | 2015-06-03 | 禾邦电子（中国）有限公司 | Protection type bridge rectifier circuit and module comprising the same |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20141210 Termination date: 20190821 |