CN106877696A - Based on TOPSwitch-GX Switching Power Supplies - Google Patents
Based on TOPSwitch-GX Switching Power Supplies Download PDFInfo
- Publication number
- CN106877696A CN106877696A CN201510914816.XA CN201510914816A CN106877696A CN 106877696 A CN106877696 A CN 106877696A CN 201510914816 A CN201510914816 A CN 201510914816A CN 106877696 A CN106877696 A CN 106877696A
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- China
- Prior art keywords
- circuit
- switching power
- power supplies
- topswitch
- circuits
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Classifications
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2176—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Based on TOPSwitch-GX Switching Power Supplies, constituted by based on TOP249Y circuits, TOP249Y peripheral control circuits, T0P249Y protection circuits and compensation circuit, anti-jamming circuit, output filter circuit and feedback control circuit.The TOP249Y circuits are the Switching Power Supplies of the 24V/l0A using T0P249Y designs, and the circuit uses inverse-excitation type translation circuit.Can steadily in the long term be worked in the case where defeated people's voltage change is big based on TOPSwitch-GX Switching Power Supplies.This Single-Chip Switching Mode Power Circuit has the advantages that simple structure and control method, small volume, noise be small, high conversion efficiency, with wide applicability and practicality.
Description
Technical field
The present invention relates to be based on TOPSwitch-GX Switching Power Supplies.
Background technology
With flourishing that power-supply system is modernized, Switching Power Supply is widely used with its superior technology and economic performance.At present, one of development trend of Switching Power Supply is integrated and miniaturization, and the single-chip switching power supply that power switch, control circuit, feedback circuit etc. are integrated in same chip is had the advantages that high integration, high performance-price ratio, peak envelope peripheral circuit, optimal performance index.Because traditional switch power supply typically uses discrete MOSFET power switch and PWM integrated manipulators, cause system peripherals circuit complicated, the stability of a system is not strong.
The content of the invention
To solve the above problems, the present invention is devised based on TOPSwitch-GX Switching Power Supplies.
The technical solution adopted for the present invention to solve the technical problems is：Constituted by based on TOP249Y circuits, TOP249Y peripheral control circuits, T0P249Y protection circuits and compensation circuit, anti-jamming circuit, output filter circuit and feedback control circuit based on TOPSwitch-GX Switching Power Supplies.
Described is the Switching Power Supply of the 24V/l0A designed using T0P249Y based on TOP249Y circuits, and the circuit uses inverse-excitation type translation circuit.
The TOP249Y peripheral control circuits, under-voltage detection can guarantee that to be exported in the case where defeated people declines and do not interfere with that overvoltage detection can close the MOSFET pipes of T0P249Y in the case where defeated people is too high, it is to avoid component is damaged.
The T0P249Y protection circuits and compensation circuit, R2、R3、C3、D1、D2The drain electrode protection circuit of MOSFET pipes is constituted, for absorbing the peak voltage that high frequency transformer first winding leakage inductance is produced when T0P249Y is turned off, by R2、R3、C3With D1It is in parallel so that the most of consumption of energy in leakage inductance is in R2、R3On, therefore R2、R3Permission power must be guaranteed, can use 68k with（2W）, to ensure D1Normal work, meanwhile, by D1Restriction scope can be clamped the voltage at, makes the power supply in the case of unlatching and overload, can meet requirement.Because this power supply use environment is more severe, wherein D1Using transient voltage suppressor (TVS), D2Use Ultrafast recovery diode.C4、C5、R4And C6、R5Loop compensation circuit is constituted, meanwhile, by the shunt capacitance C of control end4、C5Parallel connection can preferably suppress noise jamming.
The anti-jamming circuit, CX、C1、L1Be connected on AC power end of incoming cables, for filtering grid line between series mode interference, C hereXReferred to as " X " electric capacity；Electric capacity CY
(referred to as " Y " electric capacity) is connected between defeated people's high pressure and output ground, common mode disturbances can be minimized, simultaneously as T0P249Y also has frequency jitter characteristic, by using rational wiring technique, restrained effectively noise jamming.
The output filter circuit, two grades of windings of high frequency transformer through common cathode Schottky to after pipe MBR1620CT (may further be used to further reduce the loss of diode to pipe using common cathode Schottky here) rectification by electrochemical capacitor C7、C8、C9Filtering, their value can use 47 μ F (50v), then through L2Composition low pass filter is exported to load, L2The main high-frequency noise that suppresses is exported to load, electrochemical capacitor C11It is mainly used in reducing the AC ripple of DC voltage.Meanwhile, the equivalent series resistance of output filter capacitor will set to obtain very little, be so avoided that capacity loss increase and reduce the reliability of power supply, in addition, by C7、C8、C9Three electrolytic capacitor filters are in parallel, and can substantially reduce its equivalent inductance.
The feedback control circuit, Switching Power Supply can steady operation in rated range, the design of feedback control circuit just seems extremely important.Another secondary windings as supply voltage winding, the voltage that will be exported are passed through into D3、C10It is added in after rectifying and wave-filtering on the positive pole of the diode of linear optical coupling, the control pole pin (C) of TO249Y provides foreign current by the linear optical coupling.R7It is the current-limiting resistance of optocoupler, Rg is used to be C2Discharge path, diode D are provided7With electric capacity C12Composition secondary buffering circuit, starting the output current of moment detection optocoupler for detecting, control pole pin (C) is set to have foreign current and be charged, so as to change the electric current of control pole pin (C) to realize pre-adjustment, it is ensured that the power supply can start in low-voltage and full load.By D4、D5、D6Three voltage-stabiliser tubes are in series and constitute optocoupler reference voltage source, the luminous intensity of Light-Emitting Diode can completely by output voltage control, through the control pole pin (C) optically coupling to TOP249Y, when low voltage so in optocoupler, the electric current of person who lives in exile's pin C declines, so that output voltage rises, when voltage is higher, the electric current of person who lives in exile's pin C rises, so that output voltage declines, by adjusting the dutycycle of output, the output of voltage is finally set to remain unchanged, to reach the purpose of voltage stabilizing.
The beneficial effects of the invention are as follows can steadily in the long term be worked in the case where defeated people's voltage change is big based on TOPSwitch-GX Switching Power Supplies.This Single-Chip Switching Mode Power Circuit has the advantages that simple structure and control method, small volume, noise be small, high conversion efficiency, with wide applicability and practicality.
Brief description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the 240W Switching Power Supply schematic diagrams based on TOP249Y circuits.
Specific embodiment
In Fig. 1, TOPSwitch-GX chip internals have 6 pins, are followed successively by control pole pin (C), voltage detecting pin (L), outside current limliting pin (X), source electrode pin (S), switching frequency base pin selection (F), drain pin (D).Its internal circuit is main to be made up of control voltage source, bandgap voltage reference, oscillator, shunt regulator/error amplifier, pulse width modulator PWM, door driving stage and output stage, current foldback circuit, overheating protection circuit, shut-off/automatic part such as circuit and high-voltage current source that restarts.In the family chip, TOP249Y peak power outputs meet the design requirement of this Switching Power Supply up to 29OW.TOP249Y peripheral control circuits, under-voltage detection can guarantee that to be exported in the case where defeated people declines and do not interfere with that overvoltage detection can close the MOSFET pipes of T0P249Y in the case where defeated people is too high, it is to avoid component is damaged.T0P249Y Specifeca tion speeifications：L) TOP249Y is the single-chip switching power supply module of wide-voltage range, and its peak power output is up to 290w；2) T0P249Y employs frequency jitter, can substantially reduce noise jamming, and when noise overtone order is higher, inhibitory action is more obvious；3) when Switching Power Supply underloading, TOP249Y further reduces power output using cycle-skipping wave technology, to improve stability during underloading, simultaneously, can according to load situation of change, Switching Power Supply can between normal work and cycle-skipping ripple mode automatic conversion, therefore, fictitious load can be connect in output end, it is possible to decrease the power consumption under unloaded or holding state.
Claims (7)
1. TOPSwitch-GX Switching Power Supplies are based on, are constituted by based on TOP249Y circuits, TOP249Y peripheral control circuits, T0P249Y protection circuits and compensation circuit, anti-jamming circuit, output filter circuit and feedback control circuit.
2. according to claim 1 based on TOPSwitch-GX Switching Power Supplies, it is characterized in that the TOP249Y circuits are the Switching Power Supplies of the 24V/l0A using T0P249Y designs, the circuit uses inverse-excitation type translation circuit.
3. according to claim 1 based on TOPSwitch-GX Switching Power Supplies, it is characterized in that the under-voltage detection of dynamic TOP249Y peripheral control circuits can guarantee that to be exported in the case where defeated people declines and not interfere with, overvoltage detection can close the MOSFET pipes of T0P249Y in the case where defeated people is too high, it is to avoid component is damaged.
4. according to claim 1 based on TOPSwitch-GX Switching Power Supplies, it is characterized in that the T0P249Y protection circuits and compensation circuit power supply are used to absorb the peak voltage that high frequency transformer first winding leakage inductance is produced when T0P249Y is turned off.
5. according to claim 1 based on TOPSwitch-GX Switching Power Supplies, it is characterized in that the anti-jamming circuit filters the series mode interference between grid line and is minimized common mode disturbances.
6. according to claim 1 based on TOPSwitch-GX Switching Power Supplies, it is characterized in that the AC ripple and equivalent inductance of output filter circuit reduction DC voltage.
7. according to claim 1 based on TOPSwitch-GX Switching Power Supplies, it is characterized in that the dutycycle of feedback control circuit regulation output, finally makes the output of voltage remain unchanged, to reach the purpose of voltage stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510914816.XA CN106877696A (en) | 2015-12-13 | 2015-12-13 | Based on TOPSwitch-GX Switching Power Supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510914816.XA CN106877696A (en) | 2015-12-13 | 2015-12-13 | Based on TOPSwitch-GX Switching Power Supplies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106877696A true CN106877696A (en) | 2017-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510914816.XA Pending CN106877696A (en) | 2015-12-13 | 2015-12-13 | Based on TOPSwitch-GX Switching Power Supplies |
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| Country | Link |
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| CN (1) | CN106877696A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592007A (en) * | 2017-09-21 | 2018-01-16 | 深圳市华星光电技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN108429467A (en) * | 2018-05-17 | 2018-08-21 | 深圳市三维自动化工程有限公司 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
-
2015
- 2015-12-13 CN CN201510914816.XA patent/CN106877696A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592007A (en) * | 2017-09-21 | 2018-01-16 | 深圳市华星光电技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN108429467A (en) * | 2018-05-17 | 2018-08-21 | 深圳市三维自动化工程有限公司 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170620 |