CN110768525A - Large-current DC-DC conversion device - Google Patents
Large-current DC-DC conversion device Download PDFInfo
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- CN110768525A CN110768525A CN201911196334.XA CN201911196334A CN110768525A CN 110768525 A CN110768525 A CN 110768525A CN 201911196334 A CN201911196334 A CN 201911196334A CN 110768525 A CN110768525 A CN 110768525A
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- resistor
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- diode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a large-current DC-DC conversion device, which has the following circuit structure: the high-current DC-DC conversion device has the functions of thermal shutdown and current limitation and output short-circuit protection, and is simple in system design, convenient, flexible and high in power density, and the efficiency is up to more than 90%.
Description
Technical Field
The invention relates to the field of electronic circuits, in particular to a high-current DC-DC conversion device.
Background
The DC/DC converter is a voltage converter that effectively outputs a fixed voltage after converting an input voltage. DC/DC converters are divided into three categories: a step-up DC/DC converter, a step-down DC/DC converter, and a step-up/step-down DC/DC converter. Three types of control can be used as required. The PWM control type is efficient and has good output voltage ripple and noise. The PFM control type has an advantage of low power consumption even when used for a long time, particularly when used under a small load. The PWM/PFM switching type PFM control is carried out at the time of a small load, and is automatically switched to the PWM control at the time of a heavy load. At present, the DC-DC converter is widely used in products such as mobile phones, MP3, digital cameras, portable media players, and the like. Belonging to chopper circuits in circuit type classification. The invention aims to design a DC-DC conversion device capable of realizing large current.
Disclosure of Invention
The invention aims to provide a high-current DC-DC conversion device with a reasonable structural design.
The technical scheme adopted by the invention for solving the problems is as follows:
a large current DC-DC conversion device has the following circuit structure: a voltage access terminal VCC is connected to one end of a coupling capacitor CIN, one end of a capacitor C1, one end of a capacitor CC and a VIN pin of a chip U1, the other end of the coupling capacitor CIN is grounded, the other end of the capacitor C1 is grounded, the other end of the capacitor CC is connected to a VC pin of the chip U1, a GND pin of the chip U1 is grounded, an FB pin of the chip U1 is connected to one end of a resistor R1 and one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected to one end of an oscillation coil L1, the other end of the oscillation coil L1 is connected to a SW pin of the chip U1 and one end of a diode D1, the other end of the diode D1 is grounded, the other end of the resistor R2, one end of the capacitor C; the other end of the resistor R4 is connected with the anode of the diode LED1, and the cathode of the diode LED1 is connected with the negative voltage output end Vout-; one end of the coupling capacitor COUT is connected with the negative voltage output end Vout-, and the other end is grounded.
The further improvement lies in that: the other end of the resistor R3 is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the control module.
The further improvement lies in that: and the control module adopts an STM32 singlechip.
The further improvement lies in that: the chip U1 adopts an MP2359 DC voltage reduction conversion chip.
Compared with the prior art, the invention has the following advantages and effects: the high-current DC-DC conversion device has the functions of thermal shutoff, current limitation and output short circuit protection, and has the advantages of simple system design, convenience, flexibility, high power density and efficiency of more than 90 percent.
Drawings
Fig. 1 is a schematic circuit diagram of a large-current DC-DC converter according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1, the present embodiment includes a large current DC-DC converter, and the circuit structure thereof is as follows: a voltage access terminal VCC is connected to one end of a coupling capacitor CIN, one end of a capacitor C1, one end of a capacitor CC and a VIN pin of a chip U1, the other end of the coupling capacitor CIN is grounded, the other end of the capacitor C1 is grounded, the other end of the capacitor CC is connected to a VC pin of the chip U1, a GND pin of the chip U1 is grounded, an FB pin of the chip U1 is connected to one end of a resistor R1 and one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected to one end of an oscillation coil L1, the other end of the oscillation coil L1 is connected to a SW pin of the chip U1 and one end of a diode D1, the other end of the diode D1 is grounded, the other end of the resistor R2, one end of the capacitor C; the other end of the resistor R4 is connected with the anode of the diode LED1, and the cathode of the diode LED1 is connected with the negative voltage output end Vout-; one end of the coupling capacitor COUT is connected with the negative voltage output end Vout-, and the other end is grounded.
In this embodiment, the other end of the resistor R3 is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the control module. The control module adopts an STM32 singlechip. The chip U1 adopts MP2359 DC step-down conversion chip.
The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. A high-current DC-DC conversion device, characterized in that: the circuit structure is as follows: a voltage access terminal VCC is connected to one end of a coupling capacitor CIN, one end of a capacitor C1, one end of a capacitor CC and a VIN pin of a chip U1, the other end of the coupling capacitor CIN is grounded, the other end of the capacitor C1 is grounded, the other end of the capacitor CC is connected to a VC pin of the chip U1, a GND pin of the chip U1 is grounded, an FB pin of the chip U1 is connected to one end of a resistor R1 and one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected to one end of an oscillation coil L1, the other end of the oscillation coil L1 is connected to a SW pin of the chip U1 and one end of a diode D1, the other end of the diode D1 is grounded, the other end of the resistor R2, one end of the capacitor C; the other end of the resistor R4 is connected with the anode of the diode LED1, and the cathode of the diode LED1 is connected with the negative voltage output end Vout-; one end of the coupling capacitor COUT is connected with the negative voltage output end Vout-, and the other end is grounded.
2. A high current DC-DC conversion device according to claim 1, wherein: the other end of the resistor R3 is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the control module.
3. A high current DC-DC conversion device according to claim 1, wherein: and the control module adopts an STM32 singlechip.
4. A high current DC-DC conversion device according to claim 1, wherein: the chip U1 adopts an MP2359 DC voltage reduction conversion chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196334.XA CN110768525A (en) | 2019-11-29 | 2019-11-29 | Large-current DC-DC conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196334.XA CN110768525A (en) | 2019-11-29 | 2019-11-29 | Large-current DC-DC conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110768525A true CN110768525A (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911196334.XA Pending CN110768525A (en) | 2019-11-29 | 2019-11-29 | Large-current DC-DC conversion device |
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| CN (1) | CN110768525A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102573189A (en) * | 2010-12-27 | 2012-07-11 | 海洋王照明科技股份有限公司 | Step-down light-emitting diode (LED) driving circuit |
| US20150229123A1 (en) * | 2014-02-11 | 2015-08-13 | Tyco Electronics Corporation | Pre-charge circuit for an electromechanical relay |
| US20160105096A1 (en) * | 2014-10-13 | 2016-04-14 | Metal Industries Research & Development Centre | Power factor correction controller and power supply apparatus using the same |
| CN206807035U (en) * | 2017-03-01 | 2017-12-26 | 东莞市优琥电子科技有限公司 | A onboard charger short-circuit protection improves circuit |
-
2019
- 2019-11-29 CN CN201911196334.XA patent/CN110768525A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102573189A (en) * | 2010-12-27 | 2012-07-11 | 海洋王照明科技股份有限公司 | Step-down light-emitting diode (LED) driving circuit |
| US20150229123A1 (en) * | 2014-02-11 | 2015-08-13 | Tyco Electronics Corporation | Pre-charge circuit for an electromechanical relay |
| US20160105096A1 (en) * | 2014-10-13 | 2016-04-14 | Metal Industries Research & Development Centre | Power factor correction controller and power supply apparatus using the same |
| CN206807035U (en) * | 2017-03-01 | 2017-12-26 | 东莞市优琥电子科技有限公司 | A onboard charger short-circuit protection improves circuit |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200207 |