CN203617908U - Multipath non-isolation switching power supply - Google Patents
Multipath non-isolation switching power supply Download PDFInfo
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- CN203617908U CN203617908U CN201320815375.4U CN201320815375U CN203617908U CN 203617908 U CN203617908 U CN 203617908U CN 201320815375 U CN201320815375 U CN 201320815375U CN 203617908 U CN203617908 U CN 203617908U
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Abstract
The utility model relates to a multipath non-isolation switching power supply. According to the multipath non-isolation switching power supply, an input inductor L1 is connected in series with a main power switch Q1; at least one output branch is connected between the input inductor and the main power switch; at least one branch is provided with a diode D1 and an output capacitor C1. The anode of the diode is connected between the input inductor and the main power supply while the cathode of the diode is connected with a positive electrode of the output capacitor, and the negative electrode of the capacitor is connected with the loop ground. For each added branch, a branch power switch and an output branch capacitor are provided, wherein one end of each branch power switch is connected between the input inductor and the main power switch while the other end is connected with the positive electrode of the corresponding branch capacitor, and the negative electrode of each branch capacitor is connected with the loop ground. The branches are connected in parallel. The multipath non-isolation switching power supply can realize multipath output. Since each path of output can be independently controlled, each path of output voltage or current can be accurately controlled; and since the branches shares one inductor, the size and cost of the circuit can become very low.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, relates in particular to a kind of multichannel Unisolated switch power supply, is applicable to non-isolation multichannel output application scenario.
Background technology
The non-insulating power supply of multichannel has a wide range of applications in daily life, such as with battery powered portable set, or the equipment of other direct direct current supplys, wherein, often use the non-insulating power supply of multichannel.Adopted two kinds of methods to realize the non-insulating power supply power supply of multichannel, method 1, utilizes multiple power conversion circuits, directly obtains each road required voltage in the past.Method 2, utilizes power conversion circuit to realize the wherein voltage on the highest amplitude one tunnel, and uses line style voltage stabilizing technique, obtains other each road voltage.The advantage of method 1 is that power conversion efficiency is high, and shortcoming is circuit complexity, and cost is high, and volume ratio is larger.The advantage of method 2 is that power conversion is simple, and cost is low, but owing to adopting linear voltage stabilization, whole efficiency is low, and caloric value is large.
Utility model content
Technical problem to be solved: the utility model proposes a kind of multichannel Unisolated switch power supply for above problem.Can realize multichannel output.The output of every road is all independently to control, and therefore, every road output voltage or electric current can accurately be controlled.Share an inductance, the volume of circuit and cost can be accomplished very low.The non-insulating power supply of multichannel has a wide range of applications in daily life, such as with battery powered portable set, or the equipment of other direct direct current supplys etc.
Technical scheme: provide a kind of multichannel Unisolated switch power supply for above problem the utility model, it is characterized in that: comprise 1, one master power switch Q1 of an input inductance L, input inductance L 1 is connected with master power switch Q1;
Between input inductance L 1 and master power switch Q1, be connected with the output branch road that is more than or equal to 1, have at least a branch road to be provided with a diode D1 and output capacitance C1, the anodic bonding of diode D1 is between input inductance L 1 and master power switch Q1, the negative electrode of diode D1 is connected with the positive pole of output capacitance C1, is connected to the negative pole of capacitor C 1 and loop;
Branch road of every increase, with regard to many branch power switches and an output branch road electric capacity, one end of branch power switch is connected between input inductance L 1 and master power switch Q1, the other end is connected to the anodal utmost point of branch road electric capacity, the negative pole of branch road electric capacity is connected to ground, loop, is in parallel between each branch road.
Described master power switch Q1 and branch power switch adopt static semiconductor switch.
Described master power switch adopts power field effect pipe.
Branch power switch Q2, Q3 adopt pliotron.
Branch power switch Q2, Q3 adopt power field effect pipe, between the drain electrode end of branch power switch Q2 and the anode tap of diode D1, are connected with diode D2.The anode of diode D2 is connected with diode D1 anode, and the negative electrode of diode D2 connects the drain electrode of branch power switch Q2.
Beneficial effect: the utility model design can realize multichannel output.The output of every road is all independently to control, and therefore, every road output voltage or electric current can accurately be controlled.And share an inductance, the volume of circuit and cost can be accomplished very low.Every increase by one tunnel, only needs to increase a switching tube and storage capacitor.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of embodiment 1 of the present utility model;
Fig. 2 is the work schedule schematic diagram of embodiment 1 of the present utility model;
Fig. 3 is the circuit diagram of embodiment 2 of the present utility model;
Fig. 4 is the circuit diagram of embodiment 3 of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The utility model is applicable to the non-insulation output power supply of any multichannel, and the output of every increase Yi Ge road, need to increase a power switch.Yi San road is output as example below.
Embodiment 1:
Circuit structure is as Fig. 1, and this multichannel Unisolated switch power supply comprises 1, one master power switch Q1 of an input inductance L, and input inductance L 1 is connected with master power switch Q1;
Between input inductance L 1 and master power switch Q1, be connected with the output branch road that is more than or equal to 1, have at least a branch road to be provided with a diode D1 and output capacitance C1, the anodic bonding of diode D1 is between input inductance L 1 and master power switch Q1, the negative electrode of diode D1 is connected with the positive pole of output capacitance C1, is connected to the negative pole of capacitor C 1 and loop;
Branch road of every increase, with regard to many branch power switches (as Q2, Q3) and an output branch road electric capacity (as C2, C3), one end of branch power switch is connected between input inductance L 1 and master power switch Q1, the other end is connected to the positive pole of branch road electric capacity, the negative pole of branch road electric capacity is connected to ground, loop, is in parallel between each branch road.
All power switch periodic duties, in a switch periods, all power switchs are opened successively, are turn-offed, and its work schedule is as Fig. 2.First conducting of master power switch Q1, after conducting a period of time, master power switch Q1 turn-offs; Be branch power switch Q2 conducting afterwards, after conducting a period of time, branch power switch Q2 turn-offs; Be branch power switch Q3 conducting afterwards, after conducting a period of time, branch power switch Q3 turn-offs; After all power switchs all turn-off, diode D1 can nature conducting.
An obvious advantage Shi Mei road output voltage of the present utility model can independently be controlled.Output voltage U o1 is controlled by master power switch Q1, and other respectively export branch voltage by the control of each branch power switch.When a certain road output voltage is lower than set point, increase the ON time of this road power switch; When output voltage is higher than set point, reduce the ON time of this road power switch.
Embodiment 2: as shown in Figure 3, the places different from embodiment 1 are: master power switch Q1 adopts power field effect pipe, branch power switch Q2, branch power switch Q3 adopt pliotron.
Embodiment 3: as shown in Figure 4, the places different from embodiment 1 are: master power switch Q1 adopts power field effect pipe, branch power switch Q2, branch power switch Q3 adopt power field effect pipe, between the drain electrode end of branch power switch Q2 and the anode tap of diode D1, be connected with diode D2, the anode of diode D2 is connected with diode D1 anode, and the negative electrode of diode D2 connects the drain electrode of branch power switch Q2.
Because above circuit is all to have adopted semiconductor technology, be easy to, by all power switchs, comprise power switch pipe Q1, Q2, Q3 etc., with diode D1, and control circuit is integrated in an integrated chip, because peripheral components is fewer, in multiple-output electric power, will have wide application.
Claims (5)
1. a multichannel Unisolated switch power supply, is characterized in that: comprise 1, one master power switch Q1 of an input inductance L, input inductance L 1 is connected with master power switch Q1;
Between input inductance L 1 and master power switch Q1, be connected with the output branch road that is more than or equal to 1, have at least a branch road to be provided with a diode D1 and output capacitance C1, the anodic bonding of diode D1 is between input inductance L 1 and master power switch Q1, the negative electrode of diode D1 is just connected with output capacitance C1's, is connected to the negative pole of capacitor C 1 and loop;
Branch road of every increase, with regard to many branch power switches and an output branch road electric capacity, one end of branch power switch is connected between input inductance L 1 and master power switch Q1, the other end is connected to the positive pole of branch road electric capacity, the negative pole of branch road electric capacity is connected to node publicly, is in parallel between each branch road.
2. a kind of multichannel Unisolated switch power supply according to claim 1, is characterized in that: described master power switch Q1 and branch power switch adopt static semiconductor switch.
3. a kind of multichannel Unisolated switch power supply according to claim 1, is characterized in that: described master power switch adopts power field effect pipe.
4. a kind of multichannel Unisolated switch power supply according to claim 3, is characterized in that: branch power switch Q2, Q3 adopt pliotron.
5. a kind of multichannel Unisolated switch power supply according to claim 3, it is characterized in that: branch power switch Q2, Q3 adopt power field effect pipe, between the drain electrode end of branch power switch Q2 and the anode tap of diode D1, be connected with diode D2, the anode of diode D2 is connected with diode D1 anode, and the negative electrode of diode D2 connects the drain electrode of branch power switch Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815375.4U CN203617908U (en) | 2013-12-11 | 2013-12-11 | Multipath non-isolation switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815375.4U CN203617908U (en) | 2013-12-11 | 2013-12-11 | Multipath non-isolation switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617908U true CN203617908U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320815375.4U Expired - Fee Related CN203617908U (en) | 2013-12-11 | 2013-12-11 | Multipath non-isolation switching power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849562A (en) * | 2015-05-04 | 2015-08-19 | 华为技术有限公司 | Device and method for detecting impedance abnormality of power supply system |
| CN111106749A (en) * | 2020-01-14 | 2020-05-05 | 上海波圆电子科技有限公司 | Multi-path half-bridge power supply and control method thereof |
| CN113709941A (en) * | 2021-09-09 | 2021-11-26 | 深圳市优仕拓科技有限公司 | Circuit of high PF value non-isolation multichannel intelligent power supply |
-
2013
- 2013-12-11 CN CN201320815375.4U patent/CN203617908U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849562A (en) * | 2015-05-04 | 2015-08-19 | 华为技术有限公司 | Device and method for detecting impedance abnormality of power supply system |
| CN104849562B (en) * | 2015-05-04 | 2017-11-17 | 华为技术有限公司 | Detect the abnormal apparatus and method of supply system impedance |
| CN111106749A (en) * | 2020-01-14 | 2020-05-05 | 上海波圆电子科技有限公司 | Multi-path half-bridge power supply and control method thereof |
| CN111106749B (en) * | 2020-01-14 | 2023-09-12 | 上海波圆电子科技有限公司 | Multi-path half-bridge power supply and control method thereof |
| CN113709941A (en) * | 2021-09-09 | 2021-11-26 | 深圳市优仕拓科技有限公司 | Circuit of high PF value non-isolation multichannel intelligent power supply |
| CN113709941B (en) * | 2021-09-09 | 2024-03-08 | 深圳市优仕拓科技有限公司 | Circuit of non-isolated multichannel intelligent power supply of high PF value |
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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 |
Granted publication date: 20140528 Termination date: 20161211 |
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| CF01 | Termination of patent right due to non-payment of annual fee |