CN105375575A - Portable power supply circuit with novel structure - Google Patents
Portable power supply circuit with novel structure Download PDFInfo
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- CN105375575A CN105375575A CN201510875836.0A CN201510875836A CN105375575A CN 105375575 A CN105375575 A CN 105375575A CN 201510875836 A CN201510875836 A CN 201510875836A CN 105375575 A CN105375575 A CN 105375575A
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- charging
- tube
- drain electrode
- discharging
- pmos1
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Abstract
The present invention discloses a portable power supply circuit with a novel structure. The portable power supply circuit comprises a PMOS1 tube for charging, a PMOS2 tube for discharging and a NMOS tube for charging and discharging; the drain electrode of the PMOS1 tube for charging is connected with a voltage input end VIN, and the drain electrode of the PMOS2 tube for discharging is connected with a voltage output end VOUT; source electrodes of the PMOS1 tube for charging and the PMOS2 tube for discharging are respectively connected with the drain electrode of the NMOS tube for charging and discharging; and the drain electrode of the NMOS tube for charging and discharging is connected with an external power supply BATT through an inductor L, a sampling resistor RS and an output capacitor C in turn. Compared with the prior art, the portable power supply circuit with a novel structure is able to realize the switch mode charging function and the synchronous voltage rising function of a synchronous voltage reduction mode, and reduces a power tube, therefore the cost is reduced and the work efficiency is improved.
Description
Technical field
The present invention relates to a kind of portable power source circuit of new structure.
Background technology
Existing portable power source discharge and recharge chip, under the framework adopting switching regulator discharge and recharge, at least needs four power tubes could realize charging and discharging function.And in charging and discharging process, power flow there are three power tubes, reduce the efficiency of discharge and recharge.
Summary of the invention
The defect that the present invention seeks to exist for prior art provides a kind of portable power source circuit of new structure.
The present invention for achieving the above object, adopts following technical scheme: a kind of portable power source circuit of new structure, comprise charging PMOS1 manage, discharge with PMOS2 pipe and discharge and recharge share NMOS tube; Wherein, the described charging drain electrode of PMOS1 pipe is connected with voltage input end VIN, and the described electric discharge drain electrode of PMOS2 pipe is connected with voltage output end VOUT; Described charging PMOS1 pipe is connected with the drain electrode that the source electrode of PMOS2 pipe shares NMOS tube with described discharge and recharge respectively with electric discharge; The drain electrode that described discharge and recharge shares NMOS tube is also connected with external power source BATT by inductance L, sampling resistor RS and output capacitance C successively.
Beneficial effect of the present invention: compared with prior art: portable power source circuit of the present invention can realize switching regulator charge function and the synchronous boost function of synchronous buck pattern; And in this circuit, decrease a power tube, reduce cost, improve operating efficiency.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present invention.
Fig. 2 is the embody rule schematic diagram of the present invention in portable power source module.
Fig. 3 be the present invention under pressure-increasning state, the grid voltage of charging PMOS and underlayer voltage control waveform figure.
Embodiment
Shown in Fig. 1, relate to a kind of portable power source circuit of new structure, comprise charging PMOS1 manage, discharge with PMOS2 pipe and discharge and recharge share NMOS tube; Wherein, the described charging drain electrode of PMOS1 pipe is connected with voltage input end VIN, and the described electric discharge drain electrode of PMOS2 pipe is connected with voltage output end VOUT; Described charging PMOS1 pipe is connected with the drain electrode that the source electrode of PMOS2 pipe shares NMOS tube with described discharge and recharge respectively with electric discharge; The drain electrode that described discharge and recharge shares NMOS tube is also connected with external power source BATT by inductance L, sampling resistor RS and output capacitance C successively.
Fig. 2 is the embody rule schematic diagram of the present invention in portable power source module; Circuit of the present invention is the V_CONTROL module in figure.When systems axiol-ogy is opened to charged state during input voltage, discharging is in normal off state with PMOS2 pipe, and system works is in the switching regulator charge mode of standard.For preventing electric discharge PMOS2 pipe from leaking electricity, in the charge state, gate voltage VG2 and the underlayer voltage VB2 of PMOS2 are chosen as VG2=VB2=VIN.
When system does not detect input voltage, system works is in discharge condition, and charge with the normal shutoff of PMOS1 pipe, system works is in the synchronous boost pattern of standard.Because discharge process induction charging, cause inductance end pulse voltage VSW>VOUT, charge and must to select between VSW and VOUT (the V_CONTROL module namely in Fig. 2) with the gate voltage VG1 of PMOS1 pipe and underlayer voltage VB1.
Fig. 3 be the present invention under pressure-increasning state, charge with the grid voltage of PMOS1 pipe and underlayer voltage control waveform figure.Known in figure, within the TON time of NMOS tube conducting, VG1=VB1=VOUT; Within the TOFF time that NMOS tube is closed, because VSW>VOUT, for preventing inductance to the electric leakage of VIN end, select VG1=VB1=VSW.
To sum up, according to the work schedule of standard charging and boosting, select suitable grid voltage and substrate level, effectively can control power tube, leak electricity to prevent unwanted power tube.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a portable power source circuit for new structure, is characterized in that, comprise charging PMOS1 manage, discharge with PMOS2 pipe and discharge and recharge share NMOS tube; Wherein, the described charging drain electrode of PMOS1 pipe is connected with voltage input end VIN, and the described electric discharge drain electrode of PMOS2 pipe is connected with voltage output end VOUT; Described charging PMOS1 pipe is connected with the drain electrode that the source electrode of PMOS2 pipe shares NMOS tube with described discharge and recharge respectively with electric discharge; The drain electrode that described discharge and recharge shares NMOS tube is also connected with external power source BATT by inductance L, sampling resistor RS and output capacitance C successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875836.0A CN105375575A (en) | 2015-12-03 | 2015-12-03 | Portable power supply circuit with novel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875836.0A CN105375575A (en) | 2015-12-03 | 2015-12-03 | Portable power supply circuit with novel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105375575A true CN105375575A (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510875836.0A Pending CN105375575A (en) | 2015-12-03 | 2015-12-03 | Portable power supply circuit with novel structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN105375575A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090108908A1 (en) * | 2007-10-24 | 2009-04-30 | Fuji Electric Device Technology Co., Ltd. | Bootstrap circuit and step-down converter using same |
| US20100259234A1 (en) * | 2007-11-09 | 2010-10-14 | David James Megaw | Power FET gate charge recovery |
| CN201947182U (en) * | 2011-01-21 | 2011-08-24 | 杭州通测微电子有限公司 | Bi-directional DC/DC (direct current to direct current) power supply |
| CN204465342U (en) * | 2015-03-25 | 2015-07-08 | 宁波拜特测控技术有限公司 | A kind of two-way ultralow pressure DC/DC converter |
| CN104883057A (en) * | 2015-06-18 | 2015-09-02 | 深圳市华芯邦科技有限公司 | Mobile power converter of boost and linear charging shared power device |
| CN105281390A (en) * | 2014-07-22 | 2016-01-27 | 无锡麟力科技有限公司 | Two-in-one mobile power supply single-inductor novel structure |
| CN205178587U (en) * | 2015-12-03 | 2016-04-20 | 无锡矽林威电子有限公司 | Novel portable power source circuit of structure |
-
2015
- 2015-12-03 CN CN201510875836.0A patent/CN105375575A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090108908A1 (en) * | 2007-10-24 | 2009-04-30 | Fuji Electric Device Technology Co., Ltd. | Bootstrap circuit and step-down converter using same |
| US20100259234A1 (en) * | 2007-11-09 | 2010-10-14 | David James Megaw | Power FET gate charge recovery |
| CN201947182U (en) * | 2011-01-21 | 2011-08-24 | 杭州通测微电子有限公司 | Bi-directional DC/DC (direct current to direct current) power supply |
| CN105281390A (en) * | 2014-07-22 | 2016-01-27 | 无锡麟力科技有限公司 | Two-in-one mobile power supply single-inductor novel structure |
| CN204465342U (en) * | 2015-03-25 | 2015-07-08 | 宁波拜特测控技术有限公司 | A kind of two-way ultralow pressure DC/DC converter |
| CN104883057A (en) * | 2015-06-18 | 2015-09-02 | 深圳市华芯邦科技有限公司 | Mobile power converter of boost and linear charging shared power device |
| CN205178587U (en) * | 2015-12-03 | 2016-04-20 | 无锡矽林威电子有限公司 | Novel portable power source circuit of structure |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160302 |