CN203617878U - Resonance soft switch with constant conductive time - Google Patents
Resonance soft switch with constant conductive time Download PDFInfo
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- CN203617878U CN203617878U CN201320413061.1U CN201320413061U CN203617878U CN 203617878 U CN203617878 U CN 203617878U CN 201320413061 U CN201320413061 U CN 201320413061U CN 203617878 U CN203617878 U CN 203617878U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
Disclosed is a resonance soft switch with a constant conductive time. The soft switch includes: a MOS tube Q1, a MOS tube Q2, a capacitor Cr, a capacitor C2, a transformer T1, an inductor Lr, a diode D1 and a diode D2. The MOS tube Q1 is provided with a Vg1 connecting terminal and a Vin connecting terminal. The MOS tube Q2 is provided with a Vg2 connecting terminal; the MOS tube Q2, the inductor Lr, the capacitor Cr and the primary side of the transformer T1 are connected to each other in series; A primary grounding GND is connected between the primary side of the transformer T1 and the MOS tube Q2; the MOS tube Q1 is connected between the MOS tube Q2 and the capacitor Cr; the secondary side of the transformer T1 is connected to the diode D1 and the diode D2 in series; the capacitor C2 is connected to the diode D1 in parallel; one side of the capacitor C2 is connected to an output terminal V0 and the other side of the capacitor C2 is connected to a secondary grounding SG. Compared with a conventional resonance circuit, the resonance soft switch of the utility model is higher in efficiency and smaller in switch tube stress. The EMI (Electromagnetic Interference) is reduced. The circuit of the resonance soft switch is simple and easy to achieve. The reasonable soft switch can be used in the LED driving power supply with high and medium power, the industrial switching power supply and the charger with high power, and can achieve the effect of energy saving, environmental protection and cost reduction.
Description
Technical field
The utility model relates to field of switches, is specially a kind of resonant type soft-switch of fixing ON time.
Background technology
Traditional PWM Chopper Regulators, its power component works under hard switching pattern, and switching loss is large, efficiency is low, is difficult to realize by high frequency the lifting of power density, and EM work characteristic is poor simultaneously, need to increase a lot of filtering and suppress unit, both increase cost, also reduce efficiency.
Controlled resonant converter utilizes resonant circuit to create soft Switching Condition for power component, has reduced switching loss.In controlled resonant converter, with three element LLC current resonance converter typical case the most, apply the most general; Than other soft switch transducer, the no-voltage that LLC converter can be realized former limit MOSFET in whole loading range is opened the zero-current switching with secondary diode.This had both reduced switching loss, had improved efficiency, was convenient to high frequency, improved power density, had also reduced components and parts stress simultaneously, had reduced EMI.
The shortcoming of LLC converter: due near only operating efficiency optimum resonance frequency of LLC, therefore often rated operation point is arranged near resonant frequency point, in the time of input voltage reduction or output voltage increase, obtain larger gain by reducing operating frequency; In the time of input voltage increase or output voltage reduction, obtain lower gain by improving operating frequency.But on resonance frequency, frequency is inadequate to gain-adjusted ability, and adjustable range is narrower, allow to regulate, operating frequency range also can non-constant width.Therefore, LLC converter is not suitable for wide-voltage range application, comprises wide input voltage range and wide output voltage range.This has limited the application of LLC soft switch transducer to a great extent.In many occasions that need wide-voltage range application, existing LLC converter is difficult to obtain application preferably.
Utility model content
The technical problem that the utility model solves is to provide a kind of resonant type soft-switch of fixing ON time, to solve the problem proposing in above-mentioned background technology.
The technical problem that the utility model solves realizes by the following technical solutions: a kind of resonant type soft-switch of fixing ON time, comprise: metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, capacitor C r, capacitor C 2, transformer T1, inductance L r, diode D1, diode D2, described metal-oxide-semiconductor Q1 is provided with Vg1 incoming end, Vin incoming end, metal-oxide-semiconductor Q2 is provided with Vg2 incoming end, metal-oxide-semiconductor Q2, inductance L r, capacitor C r, transformer T1 primary side are connected in series, between transformer T1 primary side and metal-oxide-semiconductor Q2, access elementary ground GND, metal-oxide-semiconductor Q1 accesses between metal-oxide-semiconductor Q2 and capacitor C r; Described transformer T1 secondary side and diode D1, diode D2 are connected in series, and capacitor C 2 is connected in parallel with diode D1, and capacitor C 2 one side joints have output V0, opposite side access secondary ground SG.
Between described capacitor C r and metal-oxide-semiconductor Q1 access point, be provided with contact a.
Between described inductance L r and transformer T1 primary side, be provided with access point b.
Compared with prior art, the beneficial effects of the utility model are: the utility model is compared with traditional resonant circuit, has higher efficiency, and less switching tube stress reduces EMI and disturbs, and circuit is simple, easily realizes; Can be used in high and medium power (50W-1000W) LED driving power, industrial Switching Power Supply, on high-power charger, the effect that can reach energy-conserving and environment-protective, reduces costs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
In order to make of the present utility modelly to realize technological means, creation characteristic, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of resonant type soft-switch of fixing ON time, comprise: metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, capacitor C r, capacitor C 2, transformer T1, inductance L r, diode D1, diode D2, described metal-oxide-semiconductor Q1 is provided with Vg1 incoming end, Vin incoming end, metal-oxide-semiconductor Q2 is provided with Vg2 incoming end, metal-oxide-semiconductor Q2, inductance L r, capacitor C r, transformer T1 primary side are connected in series, between transformer T1 primary side and metal-oxide-semiconductor Q2, access elementary ground GND, metal-oxide-semiconductor Q1 accesses between metal-oxide-semiconductor Q2 and capacitor C r; Described transformer T1 secondary side and diode D1, diode D2 are connected in series, and capacitor C 2 is connected in parallel with diode D1, and capacitor C 2 one side joints have output V0, opposite side access secondary ground SG.
Between described capacitor C r and metal-oxide-semiconductor Q1 access point, be provided with contact a.
Between described inductance L r and transformer T1 primary side, be provided with access point b.
Traditional resonance oscillation semi-bridge (LLC) can not be accomplished zero-current switching completely; Setting maximum switching frequency is
low-limit frequency is 1/2fm, in the time that switching frequency is less than 1/2fm, system enters PWM pattern, in the time that switching frequency is greater than 1/2fm and is less than fm, system enters PFM pattern, in PFM pattern, there is the fixing ON time Ton of setting, and ON time Ton>=1/2fm of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, two switching tube metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 are zero current turning-on, secondary switch pipe is also zero current passing, and this circuit is resonant circuit, the through-put power P=CrVin of transformer completely
2f, in the time that load becomes large, capacitor C r, inductance L r are constant, and frequency f becomes large, makes output voltage constant, maintains output constant voltage.In the time of maximum load, equal when frequency
in the time that load reduces, switching frequency f also reduces, and switching frequency changes between 1/2fm at fm, LC resonance frequency is constant, so reduce switching frequency during fm becomes 1/2fm in load, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 are also in zero current turning-on and cut-off, and secondary commutation diode D1, diode D2 are also at Zero Current Switch state, thereby greatly reduce the loss of primary and secondary switching tube and rectifying tube, improved the efficiency of complete machine.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.Claimed scope of the present utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. the resonant type soft-switch of a fixing ON time, comprise: metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, capacitor C r, capacitor C 2, transformer T1, inductance L r, diode D1, diode D2, it is characterized in that: described metal-oxide-semiconductor Q1 is provided with Vg1 incoming end, Vin incoming end, metal-oxide-semiconductor Q2 is provided with Vg2 incoming end, metal-oxide-semiconductor Q2, inductance L r, capacitor C r, transformer T1 primary side are connected in series, between transformer T1 primary side and metal-oxide-semiconductor Q2, access elementary ground GND, metal-oxide-semiconductor Q1 accesses between metal-oxide-semiconductor Q2 and capacitor C r; Described transformer T1 secondary side and diode D1, diode D2 are connected in series, and capacitor C 2 is connected in parallel with diode D1, and capacitor C 2 one side joints have output V0, opposite side access secondary ground SG.
2. the resonant type soft-switch of a kind of fixing ON time according to claim 1, is characterized in that: between described capacitor C r and metal-oxide-semiconductor Q1 access point, be provided with contact a.
3. the resonant type soft-switch of a kind of fixing ON time according to claim 1, is characterized in that: between described inductance L r and transformer T1 primary side, be provided with access point b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320413061.1U CN203617878U (en) | 2013-07-04 | 2013-07-04 | Resonance soft switch with constant conductive time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320413061.1U CN203617878U (en) | 2013-07-04 | 2013-07-04 | Resonance soft switch with constant conductive time |
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| Publication Number | Publication Date |
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| CN203617878U true CN203617878U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320413061.1U Expired - Fee Related CN203617878U (en) | 2013-07-04 | 2013-07-04 | Resonance soft switch with constant conductive time |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849537A (en) * | 2015-04-28 | 2015-08-19 | 成都芯源系统有限公司 | Switch converter, controller thereof and zero current detection method |
| CN105490540A (en) * | 2014-09-19 | 2016-04-13 | 万国半导体(开曼)股份有限公司 | Constant on-time switching converter |
| CN108494260A (en) * | 2018-04-11 | 2018-09-04 | 深圳市金威源科技股份有限公司 | A kind of soft switch circuit |
| CN113595400A (en) * | 2021-07-13 | 2021-11-02 | 华为技术有限公司 | Control method and controller of DC/DC converter |
-
2013
- 2013-07-04 CN CN201320413061.1U patent/CN203617878U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490540A (en) * | 2014-09-19 | 2016-04-13 | 万国半导体(开曼)股份有限公司 | Constant on-time switching converter |
| CN105490540B (en) * | 2014-09-19 | 2019-09-06 | 万国半导体(开曼)股份有限公司 | Fixed turn-on time suitching type conversion equipment |
| CN104849537A (en) * | 2015-04-28 | 2015-08-19 | 成都芯源系统有限公司 | Switch converter, controller thereof and zero current detection method |
| CN104849537B (en) * | 2015-04-28 | 2017-08-22 | 成都芯源系统有限公司 | Switch converter, controller thereof and zero current detection method |
| CN108494260A (en) * | 2018-04-11 | 2018-09-04 | 深圳市金威源科技股份有限公司 | A kind of soft switch circuit |
| CN113595400A (en) * | 2021-07-13 | 2021-11-02 | 华为技术有限公司 | Control method and controller of DC/DC converter |
| CN113595400B (en) * | 2021-07-13 | 2023-08-22 | 华为数字能源技术有限公司 | Control method and controller of DC/DC converter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20190704 |
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| CF01 | Termination of patent right due to non-payment of annual fee |