CN204190616U - A kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS - Google Patents
A kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS Download PDFInfo
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- CN204190616U CN204190616U CN201420669815.4U CN201420669815U CN204190616U CN 204190616 U CN204190616 U CN 204190616U CN 201420669815 U CN201420669815 U CN 201420669815U CN 204190616 U CN204190616 U CN 204190616U
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Abstract
The utility model relates to a kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS, synchronous boost control integration circuit is: electrify restoration circuit is connected with oscillating circuit, oscillating circuit is connected with logical operation control circuit, logical operation control circuit is connected with boosting input detecting circuit, PWM output driving circuit, the output detection circuit that boosts, output overcurrent testing circuit respectively, PWM output driving circuit is connected with built-in MOS circuit, and built-in MOS circuit is connected with boosting output detection circuit.The utility model is used for boost control circuit and the input and output protection of portable power source, only needs minute quantity peripheral components can realize portable power source high conversion efficiency and exports, a large amount of saving peripheral components cost and production cost.
Description
Technical field
The utility model relates to a kind of integrated circuit, particularly relates to the high efficiency synchronous boosting rectifier control integrated circuit of the built-in MOS of a kind of Novel belt.
Background technology
Flourish along with smart mobile phone, intelligent use and various cell phone entertainment occupy people's more time, bring challenges also to the battery of mobile phone simultaneously, lithium battery capacity constantly promotes, but or the demand of people can not be met, the appearance of portable power source, well addresses this problem.The complex scenario that current most of portable power source still uses the asynchronous pressure boosting of outside MOS+ rectifier diode to manage, boosting efficiency is not high and need expensive peripheral components cost and production cost.
Summary of the invention
The purpose of this utility model, in order to overcome defect and the problem of the existence of above-mentioned prior art, provides the high efficiency synchronous boosting rectifier control integrated circuit of the built-in MOS of a kind of Novel belt.The utility model is used for boost control circuit and the input and output protection of portable power source, only needs minute quantity peripheral components can realize portable power source high conversion efficiency and exports, a large amount of saving peripheral components cost and production cost.
A kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS, comprise electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit, it is characterized in that: electrify restoration circuit is connected with oscillating circuit, oscillating circuit is connected with logical operation control circuit, logical operation control circuit respectively with boosting input detecting circuit, PWM output driving circuit is connected, boosting output detection circuit, output overcurrent testing circuit is connected with logical operation circuit respectively, PWM output driving circuit is connected with built-in MOS circuit, built-in MOS circuit is connected with boosting output detection circuit.
Oscillating circuit provides reference clock, and reference clock is supplied to logical operation control circuit, as the time base of the various signal of logical operation control circuit process.Boosting input detecting circuit is supplied to logical operation control circuit and carries out calculation process after being sampled by outside lithium battery voltage signal VIN.Boosting output signal VOUT is fed back to logical operation control circuit by boosting output detection circuit.Output overcurrent testing circuit by over-current detection result feedback to logical operation control circuit.The feedback signal of the boosting feedback signal of output detection circuit, the feedback signal of output overcurrent testing circuit and boosting input detecting circuit comprehensively analyzed by logical operation control circuit, determines rapidly the duty ratio that current PWM exports.Pwm signal is exported by PWM output driving circuit by logical operation control circuit, the built-in MOS circuit of PWM output driving circuit Direct driver.Electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit form the synchronous boost control system of a complete built-in MOS.
Described comprise electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit be existing classical circuit.
The electrify restoration circuit of this novel practical carries out Global reset action when powering on.Oscillating circuit, after electrification reset, provides the system clock of upper frequency to export.Whether the lithium battery voltage that boosting input detecting circuit detects input is greater than input undervoltage protection threshold values, testing result is passed to logical operation control circuit.If lithium battery voltage is lower than under-voltage protection threshold values, logical operation control circuit will cut out whole synchronous boost control system.If lithium battery voltage is more than or equal to under-voltage protection threshold values, synchronous boost control system starts lithium battery voltage to be boosted to 5.0V and exports.Boosting output detection circuit detects whether output voltage VO UT is overvoltage or under-voltage, testing result is passed to logical operation control circuit.Logical operation control circuit is according to the data of boosting output detection circuit feedback, and the duty ratio of adjustment PWM, makes VOUT voltage maintain about 5.0V rapidly.PWM ripple is passed to PWM output driving circuit by logical operation control circuit, the built-in MOS circuit of PWM output driving circuit Direct driver; Built-in MOS circuit comprises a nmos circuit and a PMOS circuit.PWM output driving circuit drives the grid of PMOS and NMOS respectively, and the raster data model of logical operation control circuit to PMOS and NMOS has done appropriate Power MOSFET, to ensure efficient boosting efficiency.Output overcurrent testing circuit detects output current whether overcurrent or short circuit in real time, testing result is given logical operation control circuit, and logical operation control circuit cuts out boosting and output circuit after feeding back to output overcurrent or short circuit.After overcurrent or short-circuit signal are removed, system returns to synchronous boost state again.
Synchronous boost refers to that arithmetic logic control circuit controls NMOS and PMOS of booster circuit simultaneously, reduces the loss in efficiency of booster circuit in boost process as much as possible.Asynchronous pressure boosting refers to that booster circuit is made up of a NMOS and rectifier diode and power inductance, and in step-up discharge process, rectifier diode can produce larger energy dissipation, has a strong impact on boosting efficiency.
The utility model, compared with outside NMOS+ rectifier diode general at present, the utility model has the advantages that MOS built-in, eliminates external component NMOS and rectifier diode, significantly reduce whole system cost and production cost.The utility model have employed synchronous boost control circuit and significantly improves boosting efficiency simultaneously.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
As shown in Figure 1, the utility model comprises electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit, it is characterized in that: electrify restoration circuit is connected with oscillating circuit, oscillating circuit is connected with logical operation control circuit, logical operation control circuit respectively with boosting input detecting circuit, PWM output driving circuit is connected, boosting output detection circuit, output overcurrent testing circuit is connected with logical operation circuit respectively, PWM output driving circuit is connected with built-in MOS circuit, built-in MOS circuit is connected with boosting output detection circuit.
Oscillating circuit provides reference clock, and reference clock is supplied to logical operation control circuit, as the time base of the various signal of logical operation control circuit process.Boosting input detecting circuit is supplied to logical operation control circuit and carries out calculation process after being sampled by outside lithium battery voltage signal VIN.Boosting output signal VOUT is fed back to logical operation control circuit by boosting output detection circuit.Output overcurrent testing circuit by over-current detection result feedback to logical operation control circuit.The feedback signal of the boosting feedback signal of output detection circuit, the feedback signal of output overcurrent testing circuit and boosting input detecting circuit comprehensively analyzed by logical operation control circuit, determines rapidly the duty ratio that current PWM exports.Pwm signal is exported by PWM output driving circuit by logical operation control circuit, the built-in MOS circuit of PWM output driving circuit Direct driver.Electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit form the synchronous boost control system of a complete built-in MOS.
Described comprise electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit be existing classical circuit.
The electrify restoration circuit of this novel practical carries out Global reset action when powering on.Oscillating circuit, after electrification reset, provides the system clock of upper frequency to export.Whether the lithium battery voltage that boosting input detecting circuit detects input is greater than input undervoltage protection threshold values, testing result is passed to logical operation control circuit.If lithium battery voltage is lower than under-voltage protection threshold values, logical operation control circuit will cut out whole synchronous boost control system.If lithium battery voltage is more than or equal to under-voltage protection threshold values, synchronous boost control system starts lithium battery voltage to be boosted to 5.0V and exports.Boosting output detection circuit detects whether output voltage VO UT is overvoltage or under-voltage, testing result is passed to logical operation control circuit.Logical operation control circuit is according to the data of boosting output detection circuit feedback, and the duty ratio of adjustment PWM, makes VOUT voltage maintain about 5.0V rapidly.PWM ripple is passed to PWM output driving circuit by logical operation control circuit, the built-in MOS circuit of PWM output driving circuit Direct driver; Built-in MOS circuit comprises a nmos circuit and a PMOS circuit.PWM output driving circuit drives the grid of PMOS and NMOS respectively, and the raster data model of logical operation control circuit to PMOS and NMOS has done appropriate Power MOSFET, to ensure efficient boosting efficiency.Output overcurrent testing circuit detects output current whether overcurrent or short circuit in real time, testing result is given logical operation control circuit, and logical operation control circuit cuts out boosting and output circuit after feeding back to output overcurrent or short circuit.After overcurrent or short-circuit signal are removed, system returns to synchronous boost state again.
Synchronous boost refers to that arithmetic logic control circuit controls NMOS and PMOS of booster circuit simultaneously, reduces the loss in efficiency of booster circuit in boost process as much as possible.Asynchronous pressure boosting refers to that booster circuit is made up of a NMOS and rectifier diode and power inductance, and in step-up discharge process, rectifier diode can produce larger energy dissipation, has a strong impact on boosting efficiency.
The above is only preferred implementation of the present utility model, and be appreciated that those skilled in the art are under the prerequisite not departing from spirit of the present utility model and design, the oher improvements and changes made, all belong to invention scope of the present utility model.
Claims (2)
1. the high efficiency synchronous boosting rectifier control integrated circuit of the built-in MOS of band, comprise electrify restoration circuit (POR), oscillating circuit (OSC), logical operation control circuit, boosting input detecting circuit, PWM output driving circuit, built-in MOS circuit, boosting output detection circuit, output overcurrent testing circuit, it is characterized in that: electrify restoration circuit is connected with oscillating circuit, oscillating circuit is connected with logical operation control circuit, logical operation control circuit respectively with boosting input detecting circuit, PWM output driving circuit, boosting output detection circuit, output overcurrent testing circuit is connected, PWM output driving circuit is connected with built-in MOS circuit, built-in MOS circuit is connected with boosting output detection circuit.
2. the high efficiency synchronous boosting rectifier control integrated circuit of the built-in MOS of band as claimed in claim 1, is characterized in that: a built-in NMOS and PMOS of built-in MOS circuit, and adopts synchronous boost control mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669815.4U CN204190616U (en) | 2014-11-11 | 2014-11-11 | A kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669815.4U CN204190616U (en) | 2014-11-11 | 2014-11-11 | A kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS |
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| Publication Number | Publication Date |
|---|---|
| CN204190616U true CN204190616U (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420669815.4U Active CN204190616U (en) | 2014-11-11 | 2014-11-11 | A kind of high efficiency synchronous boosting rectifier control integrated circuit with built-in MOS |
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| Country | Link |
|---|---|
| CN (1) | CN204190616U (en) |
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2014
- 2014-11-11 CN CN201420669815.4U patent/CN204190616U/en active Active
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Effective date of registration: 20231019 Address after: 518000 706, Zhonghua science and technology building, Guangxia Road, shangmeilin, Futian District, Shenzhen, Guangdong Province Patentee after: Shenzhen Zhihua Technology Co.,Ltd. Address before: 430074, 8th Floor, West Block, Building 6, Guanggu Headquarters International, Nanhu South Road, Hongshan District, Wuhan City, Hubei Province Patentee before: WUHAN ESHINE-IC TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |