CN105278607A - Temperature linear compensating circuit applied in large-current voltage stabilizer and charger - Google Patents
Temperature linear compensating circuit applied in large-current voltage stabilizer and charger Download PDFInfo
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- CN105278607A CN105278607A CN201410355798.1A CN201410355798A CN105278607A CN 105278607 A CN105278607 A CN 105278607A CN 201410355798 A CN201410355798 A CN 201410355798A CN 105278607 A CN105278607 A CN 105278607A
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- temperature
- charger
- chip
- voltage stabilizer
- compensating circuit
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a temperature linear compensating circuit applied in a large-current voltage stabilizer and a charger, which comprises a PMOSFET and an NMOSFET, wherein the PMOSFET and the NMOSFET are connected to a diode, a reference voltage and a current source. Through linear conversion of a chip junction temperature, a chip input current is controlled to decrease with increase of the junction temperature, so that a chip can reach a dynamic thermal equilibrium state. A working temperature of the chip is ensured to reach design requirements under a maximum load condition, so that a power provided by the input current to the load can be utilized to the hilt.
Description
Technical field
The present invention relates to compensating circuit, be specifically related to a kind of temperature linearity compensating circuit be applied in big current voltage stabilizer and charger.
Background technology
In all kinds of voltage stabilizer and charger design, temperature protection module generally adopts digital processing mode, when temperature raises and exceedes protection point, logically directly closes power flow or reduces power input, decontroling Power Limitation more when the temperature decreases.The shortcoming of these class methods to maximize use power input.Again because temperature protection point generally design in value higher, when bearing power is larger, chip may work under the very near hot environment of distance protection point, and in portable equipment, this problem often has very large potential safety hazard.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of temperature linearity compensating circuit be applied in big current voltage stabilizer and charger is provided.
The present invention is realized by following technical scheme: a kind of temperature linearity compensating circuit be applied in big current voltage stabilizer and charger, comprises PMOSFET and NMOSFET, and described PMOSFET, NMOSFET connect diode, reference voltage, current source.
The invention has the advantages that: according to junction temperature of chip Automatic adjusument input current, without the need to other control ports.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that IOUT varies with temperature schematic diagram;
In figure: M1/2/3/4/8/9 is PMOSFET, M5/6/7 be NMOSFET, D1 is diode, and VR is reference voltage, and IS1/2/3 is current source.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
As shown in Figure 1 and Figure 2, a kind of temperature linearity compensating circuit be applied in big current voltage stabilizer and charger, comprises PMOSFET and NMOSFET, and described PMOSFET, NMOSFET connect diode, reference voltage, current source.
The present invention is suitable for, in the Design of Temperature Control of all kinds of voltage stabilizer and charger, utilizing the linear transformation of junction temperature of chip, and control chip input current declines with the rising of junction temperature, and chip reaches a dynamic thermal equilibrium state.Guarantee that the chip operating temperature under maximum load condition reaches designing requirement, maximum using input current provides power to load.Under set current IS 1 condition, diode drop VD is set value, and VD raises with temperature and linearly reduces.Along with temperature raises, VD gets suitable breadth length ratio close to VR, M1/2 and M3/4 just can be operated in linear zone, and the electric current flowing through M6 is designated as I_SENSE.IOUT is acted in the design of voltage stabilizer input current restriction, be designed to input current and increase with IOUT and reduce.
Above-described is only the present invention one preferred implementation, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (1)
1. be applied to the temperature linearity compensating circuit in big current voltage stabilizer and charger, it is characterized in that: comprise PMOSFET and NMOSFET, described PMOSFET, NMOSFET connect diode, reference voltage, current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355798.1A CN105278607A (en) | 2014-07-22 | 2014-07-22 | Temperature linear compensating circuit applied in large-current voltage stabilizer and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355798.1A CN105278607A (en) | 2014-07-22 | 2014-07-22 | Temperature linear compensating circuit applied in large-current voltage stabilizer and charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105278607A true CN105278607A (en) | 2016-01-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355798.1A Pending CN105278607A (en) | 2014-07-22 | 2014-07-22 | Temperature linear compensating circuit applied in large-current voltage stabilizer and charger |
Country Status (1)
| Country | Link |
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| CN (1) | CN105278607A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113760033A (en) * | 2021-09-08 | 2021-12-07 | 中国电子科技集团公司第二十四研究所 | Packaging structure of voltage reference chip and output voltage temperature compensation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039683A (en) * | 1988-07-21 | 1990-02-14 | 约翰弗兰克制造公司 | The battery charger that has the Vbe temperature-compensation circuit |
| JP2003133854A (en) * | 2001-10-29 | 2003-05-09 | Toyo Commun Equip Co Ltd | Voltage generator for compensating temperature and oscillator |
| US20070098041A1 (en) * | 2005-08-10 | 2007-05-03 | Samsung Electronics Co., Ltd. | On chip temperature detector, temperature detection method and refresh control method using the same |
| CN102111007A (en) * | 2011-03-18 | 2011-06-29 | 青岛海信移动通信技术股份有限公司 | Battery charging circuit with protection function and seat-type charger |
| CN102412611A (en) * | 2011-12-07 | 2012-04-11 | 西安启芯微电子有限公司 | Constant-current charging circuit applied to linear charger |
| US20130033305A1 (en) * | 2011-08-02 | 2013-02-07 | Renesas Electronics Corporation | Reference voltage generating circuit |
| CN103744464A (en) * | 2013-12-20 | 2014-04-23 | 中国科学院微电子研究所 | Band-gap reference circuit with current compensation |
-
2014
- 2014-07-22 CN CN201410355798.1A patent/CN105278607A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039683A (en) * | 1988-07-21 | 1990-02-14 | 约翰弗兰克制造公司 | The battery charger that has the Vbe temperature-compensation circuit |
| JP2003133854A (en) * | 2001-10-29 | 2003-05-09 | Toyo Commun Equip Co Ltd | Voltage generator for compensating temperature and oscillator |
| US20070098041A1 (en) * | 2005-08-10 | 2007-05-03 | Samsung Electronics Co., Ltd. | On chip temperature detector, temperature detection method and refresh control method using the same |
| CN102111007A (en) * | 2011-03-18 | 2011-06-29 | 青岛海信移动通信技术股份有限公司 | Battery charging circuit with protection function and seat-type charger |
| US20130033305A1 (en) * | 2011-08-02 | 2013-02-07 | Renesas Electronics Corporation | Reference voltage generating circuit |
| CN102412611A (en) * | 2011-12-07 | 2012-04-11 | 西安启芯微电子有限公司 | Constant-current charging circuit applied to linear charger |
| CN103744464A (en) * | 2013-12-20 | 2014-04-23 | 中国科学院微电子研究所 | Band-gap reference circuit with current compensation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113760033A (en) * | 2021-09-08 | 2021-12-07 | 中国电子科技集团公司第二十四研究所 | Packaging structure of voltage reference chip and output voltage temperature compensation method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |