CN205945523U - Half -bridge resonant mode DC DC converter - Google Patents
Half -bridge resonant mode DC DC converter Download PDFInfo
- Publication number
- CN205945523U CN205945523U CN201620643018.8U CN201620643018U CN205945523U CN 205945523 U CN205945523 U CN 205945523U CN 201620643018 U CN201620643018 U CN 201620643018U CN 205945523 U CN205945523 U CN 205945523U
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- China
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- resistance
- control chip
- diode
- electric capacity
- inductance
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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
The utility model discloses a half -bridge resonant mode DC DC converter relates to transfer circuit technical field. When input voltage is lower, through the influence of feedback signal to control chip U1, make the frequency of operation of circuit reduce to second output voltage has been stabilized. When input voltage rose, the switching frequency that control chip U1 provided improved thereupon, had reduced the energy transduction of circuit, made second output voltage stabilization at the rated value. Be input voltage in certain extent when change, LLC resonant transformation ware comes the frequency of operation of control chip regulating switch pipe through feedback circuit, makes the output voltage can be stably at rated output value state.
Description
Technical field
The utility model is related to translation circuit technical field, more particularly to half-bridge resonance formula DC-DC converter.
Background technology
Mode of resonance switch converters are when Development of Power Electronic Technology is to certain degree, according to the requirement of circuit performance
And produce.The operating efficiency of hard switching mode can be gradually lowered with the raising of switching frequency, and solving this problem becomes non-
Often it is necessary.At the initial stage eighties, controlled resonant converter has obtained quick development.As a kind of soft switch circuit, controlled resonant converter
Can effectively solve the problem that low efficiency problem during high-frequency work environment, this results in domestic and international researcher and greatly pay close attention to.At first
To development is LC series resonant converter (SRC).It is humorous that some researchers subsequent begin to focus on another kind of topological structure LC parallel connection
Shake converter (PRC), and through years of researches Outcome accumulation, people have analysed in depth the operating characteristic of SRC and PRC, draw
When carrying out VFC to SRC and PRC, they all have the shortcomings that certain, and SRC is to export non-adjustable, underloading under no-load condition
When output frequency is changed insensitive, PRC is that the energy ratio in resonance loop is larger, very big on the impact of the efficiency of converter, separately
When external input voltage is higher, switching loss is larger.
Utility model content
The utility model embodiment provides half-bridge resonance formula DC-DC converter, can solve present in prior art
Problem.
A kind of half-bridge resonance formula DC-DC converter, described converter includes control chip U1 and photoelectrical coupler, described control
The input of coremaking piece U1 limits and checks that resistance R1 and input power V is passed through at endi1Connect, simultaneously also by resistance R2 ground connection；Described
The current detecting end of control chip U1 passes sequentially through diode D1, electric capacity C2, resistance R4, inductance L1 and inductance L2 and described control
The high-side driver output common port of chip U1 connects；The current detecting end of described control chip U1 also by resistance R3 in parallel and
Electric capacity C1 is grounded, and the negative pole of described diode D1 is connected with described current detecting end, between described diode D1 and electric capacity C2 and
The negative pole of diode D2 connects, the plus earth of described diode D2；Described inductance L1 is also in parallel with inductance L3；Described control core
The standby mode end of piece U1 is grounded by electric capacity C3, connects simultaneously also by resistance R5 to the minimum vibration of described control chip U1
Frequency setting end；The standby mode end of described control chip U1 is connected by resistance R6 to the input of described photoelectrical coupler U2
End；The minimum oscillation frequency of described control chip U1 sets end and is grounded by resistance R7, simultaneously also by series connection resistance R8 with
Electric capacity C4 is grounded, and connects to the soft start end of described control chip U1 between described resistance R8 and electric capacity C4；Described control chip
The timing capacitor end of U1 is grounded by electric capacity C5, and the delay protection time of described control chip U1 sets end resistance in parallel
R9 and electric capacity C6 ground connection；The high-side driver bootstrap voltage mode input of described control chip U1 is connected to described control by electric capacity C7
The high-side driver common port of chip U1；The high-side driver output end of described control chip U1 resistance R10 in parallel and two poles
Pipe D3 connects to the gate of transistor Q1, and the positive pole of wherein said diode D3 is connected with the base stage of described transistor Q1；Described
The high-side driver that the base stage of transistor Q1 connects to described control chip U1 also by resistance R11 exports common port；Described crystal
The source electrode of pipe Q1 and input power Vi2Connect, simultaneously the source electrode of described transistor Q1 and drain electrode between be connected in parallel to electric capacity C8 and
Diode D4, the negative pole of wherein said diode D4 is connected with the source electrode of described transistor Q1；The drain electrode of described transistor Q1 with
The source electrode of transistor Q2 connects, the grounded drain of described transistor Q2, is connected in parallel to electric capacity C9 and two between source electrode and drain electrode
Pole pipe D5, the negative pole of described diode D5 is connected with the source electrode of described transistor Q2；Electric capacity is passed through in the drain electrode of described transistor Q2
C10 connects between described resistance R4 and inductance L1, is connected with resistance R12 between the base stage of described transistor Q2 and drain electrode, with
The low side that the base stage of Shi Suoshu transistor Q2 connects to described control chip U1 also by resistance R13 in parallel and diode D6 drives
Dynamic output end, the positive pole of wherein said diode D6 is connected with the base stage of described control chip U1；The electricity of described control chip U1
Source feeder ear passes through resistance R14 and electric capacity C11 ground connection, is additionally coupled to+12V electricity between described resistance R14 and electric capacity C11 simultaneously
Source；The earth terminal ground connection of described control chip U1；Described inductance L3 is coupled with the inductance L4 and inductance L5 of series connection, described inductance L4
Connect with diode D8 and diode D9 with inductance L5, the negative pole of the negative pole of wherein said diode D8 and diode D9 connects；
Electric capacity C13 in parallel and resistance R19 one end connect between described diode D8 and diode D9, and the other end connects to described electricity
Between sense L4 and inductance L5；Described resistance R19 two ends are output end Vo2；The earth terminal ground connection of described photoelectrical coupler U2, the
One output end is connected to output end V by resistance R14o1, second output end of described photoelectrical coupler U2 is by reference voltage source
D7 is grounded, the plus earth of wherein said reference voltage source D7；Second output end of described photoelectrical coupler U2 passes through resistance R15
Connect to described output end Vo1, described output end Vo1By the resistance R17 and resistance R18 ground connection of series connection, described photoelectrical coupler
Second output end of U2 is connected between described resistance R17 and resistance R18 by the electric capacity C12 and resistance R16 of series connection, described base
The control end of reference voltage source D7 is also connected between described resistance R17 and resistance R18.
It is preferred that model L6599 of described control chip U1.
It is preferred that model PC817 of described photoelectrical coupler U2.
It is preferred that model KA431 of described reference voltage source D7.
In the utility model embodiment, half-bridge resonance formula DC-DC converter is when input voltage is relatively low, by feeding back signal
Impact to control chip U1, makes the operating frequency of circuit reduce, thus stabilizing the second output end voltage.When input voltage liter
Gao Shi, the switching frequency that control chip U1 is provided improves therewith, reduces the energy transfer of circuit, makes the second output end voltage
Stablize in rated value.When i.e. input voltage changes within the specific limits, LLC resonant converter is by feedback circuit come control chip
Adjust the operating frequency of switching tube, so that output voltage is stablized in rated output state of value.
Brief description
Fig. 1 is for having the circuit structure diagram of the half-bridge resonance formula DC-DC converter of the utility model embodiment offer.
Specific embodiment
Below in conjunction with the accompanying drawings, a specific embodiment of the present utility model is described in detail, it is to be understood that this
The protection domain of utility model is not limited by specific embodiment.
With reference to Fig. 1, the utility model embodiment provides a kind of half-bridge resonance formula DC-DC converter, described converter bag
Include control chip U1 and photoelectrical coupler U2, in the present embodiment, model L6599 of described control chip U1, described photoelectricity
Model PC817 of coupler U2.
The input of described control chip U1 limits and checks that resistance R1 and input power V is passed through at endi1Connect, simultaneously also by electricity
Resistance R2 ground connection.The current detecting end of described control chip U1 passes sequentially through diode D1, electric capacity C2, resistance R4, inductance L1 and electricity
Sense L2 is connected with the high-side driver output common port of described control chip U1.The current detecting end of described control chip U1 also by
Resistance R3 in parallel and electric capacity C1 ground connection, the negative pole of described diode D1 is connected with described current detecting end, described diode D1
It is connected with the negative pole of diode D2 and electric capacity C2 between, the plus earth of described diode D2.Described inductance L1 also with inductance L3
In parallel.
The standby mode end of described control chip U1 is grounded by electric capacity C3, connects to described control simultaneously also by resistance R5
The minimum oscillation frequency of coremaking piece U1 sets end.The standby mode end of described control chip U1 is connected to described light by resistance R6
The input of electric coupler U2.The minimum oscillation frequency of described control chip U1 is set end and is grounded by resistance R7, also leads to simultaneously
Cross the resistance R8 and electric capacity C4 ground connection of series connection, connect between described resistance R8 and electric capacity C4 to the soft start of described control chip U1
End.The timing capacitor end of described control chip U1 is grounded by electric capacity C5, and the delay protection time of described control chip U1 sets
Hold resistance R9 in parallel and electric capacity C6 ground connection.
The high-side driver bootstrap voltage mode input of described control chip U1 is connected to described control chip U1 by electric capacity C7
High-side driver common port.The high-side driver output end of described control chip U1 resistance R10 in parallel and diode D3 is even
It is connected to the gate of transistor Q1, the positive pole of wherein said diode D3 is connected with the base stage of described transistor Q1.Described transistor
The high-side driver that the base stage of Q1 connects to described control chip U1 also by resistance R11 exports common port.Described transistor Q1's
Source electrode and input power Vi2Connect, be connected in parallel to electric capacity C8 and diode between the source electrode of described transistor Q1 and drain electrode simultaneously
D4, the negative pole of wherein said diode D4 is connected with the source electrode of described transistor Q1.The drain electrode of described transistor Q1 and transistor
The source electrode of Q2 connects, the grounded drain of described transistor Q2, is connected in parallel to electric capacity C9 and diode D5 between source electrode and drain electrode,
The negative pole of described diode D5 is connected with the source electrode of described transistor Q2.The drain electrode of described transistor Q2 is connected by electric capacity C10
To between described resistance R4 and inductance L1, it is connected with resistance R12 between the base stage of described transistor Q2 and drain electrode, described crystalline substance simultaneously
The low side that the base stage of body pipe Q2 connects to described control chip U1 also by resistance R13 in parallel and diode D6 drives output
End, the positive pole of wherein said diode D6 is connected with the base stage of described control chip U1.
The power supply side of described control chip U1 pass through resistance R14 and electric capacity C11 ground connection, simultaneously described resistance R14 and
It is additionally coupled to+12V power supply between electric capacity C11.The earth terminal ground connection of described control chip U1.
Described inductance L3 is coupled with the inductance L4 and inductance L5 of series connection, described inductance L4 and inductance L5 and diode D8 and two
Pole pipe D9 is connected, and the negative pole of the negative pole of wherein said diode D8 and diode D9 connects.Electric capacity C13 in parallel and resistance R19
One end connects between described diode D8 and diode D9, and the other end connects between described inductance L4 and inductance L5.Described
Resistance R19 two ends are output end Vo2.
The earth terminal ground connection of described photoelectrical coupler U2, the first output end is connected to output end V by resistance R14o1, described
Second output end of photoelectrical coupler U2 is grounded by reference voltage source D7, the plus earth of wherein said reference voltage source D7.
In the present embodiment, model KA431 of described reference voltage source D7.
Second output end of described photoelectrical coupler U2 is connected to described output end V by resistance R15o1, described output end
Vo1By the resistance R17 and resistance R18 ground connection of series connection, second output end of described photoelectrical coupler U2 passes through the electric capacity of series connection
C12 and resistance R16 connects between described resistance R17 and resistance R18, and the control end of described reference voltage source D7 is also connected to institute
State between resistance R17 and resistance R18.
In sum, in the utility model embodiment, half-bridge resonance formula DC-DC converter, when input voltage is relatively low, is passed through
The feedback impact to control chip U1 for the signal, makes the operating frequency of circuit reduce, thus stabilizing the second output end voltage.When defeated
When entering voltage and raising, the switching frequency that control chip U1 is provided improves therewith, reduces the energy transfer of circuit, makes second defeated
Go out terminal voltage to stablize in rated value.When i.e. input voltage changes within the specific limits, LLC resonant converter by feedback circuit Lai
Control chip adjusts the operating frequency of switching tube, so that output voltage is stablized in rated output state of value.
Only several specific embodiments of the present utility model disclosed above, but, the utility model embodiment not office
It is limited to this, the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (4)
1. a kind of half-bridge resonance formula DC-DC converter is it is characterised in that described converter includes control chip U1 and photoelectric coupling
Device, the input of described control chip U1 limits and checks that resistance R1 and input power V is passed through at endi1Connect, simultaneously also by resistance R2
Ground connection；The current detecting end of described control chip U1 passes sequentially through diode D1, electric capacity C2, resistance R4, inductance L1 and inductance L2
It is connected with the high-side driver output common port of described control chip U1；The current detecting end of described control chip U1 is also by parallel connection
Resistance R3 and electric capacity C1 ground connection, the negative pole of described diode D1 is connected with described current detecting end, described diode D1 and electricity
Hold and be connected with the negative pole of diode D2 between C2, the plus earth of described diode D2；Described inductance L1 is also in parallel with inductance L3；
The standby mode end of described control chip U1 is grounded by electric capacity C3, connects to described control chip U1 simultaneously also by resistance R5
Minimum oscillation frequency set end；The standby mode end of described control chip U1 is connected to described photoelectrical coupler by resistance R6
The input of U2；The minimum oscillation frequency of described control chip U1 is set end and is grounded by resistance R7, simultaneously also by series connection
Resistance R8 and electric capacity C4 ground connection, connects between described resistance R8 and electric capacity C4 to the soft start end of described control chip U1；Described
The timing capacitor end of control chip U1 is grounded by electric capacity C5, and the delay protection time of described control chip U1 sets end and passes through simultaneously
The resistance R9 of connection and electric capacity C6 ground connection；The high-side driver bootstrap voltage mode input of described control chip U1 by electric capacity C7 connect to
The high-side driver common port of described control chip U1；The high-side driver output end of described control chip U1 resistance in parallel
R10 and diode D3 connects to the gate of transistor Q1, the base stage of the positive pole of wherein said diode D3 and described transistor Q1
Connect；The high-side driver that the base stage of described transistor Q1 connects to described control chip U1 also by resistance R11 exports common port；
The source electrode of described transistor Q1 and input power Vi2Connect, be connected in parallel between the source electrode of described transistor Q1 and drain electrode simultaneously
Electric capacity C8 and diode D4, the negative pole of wherein said diode D4 is connected with the source electrode of described transistor Q1；Described transistor Q1
Drain electrode be connected with the source electrode of transistor Q2, the grounded drain of described transistor Q2, source electrode and drain electrode between be connected in parallel to electricity
Hold C9 and diode D5, the negative pole of described diode D5 is connected with the source electrode of described transistor Q2；The drain electrode of described transistor Q2
Connected between described resistance R4 and inductance L1 by electric capacity C10, between the base stage of described transistor Q2 and drain electrode, be connected with electricity
Hinder R12, the base stage of described transistor Q2 connects to described control chip U1 also by resistance R13 in parallel and diode D6 simultaneously
Low side drive output, the positive pole of wherein said diode D6 is connected with the base stage of described control chip U1；Described control core
The power supply side of piece U1 passes through resistance R14 and electric capacity C11 ground connection, is additionally coupled between described resistance R14 and electric capacity C11 simultaneously
+ 12V power supply；The earth terminal ground connection of described control chip U1；Described inductance L3 is coupled with the inductance L4 and inductance L5 of series connection, described
Inductance L4 and inductance L5 is connected with diode D8 and diode D9, the negative pole of wherein said diode D8 and the negative pole of diode D9
Connect；Electric capacity C13 in parallel and resistance R19 one end connect between described diode D8 and diode D9, the other end connect to
Between described inductance L4 and inductance L5；Described resistance R19 two ends are output end Vo2；The ground connection termination of described photoelectrical coupler U2
Ground, the first output end is connected to output end V by resistance R14o1, second output end of described photoelectrical coupler U2 is by benchmark electricity
Potential source D7 is grounded, the plus earth of wherein said reference voltage source D7；Second output end of described photoelectrical coupler U2 passes through electricity
Resistance R15 connects to described output end Vo1, described output end Vo1By the resistance R17 and resistance R18 ground connection of series connection, described photoelectricity
Second output end of coupler U2 is connected between described resistance R17 and resistance R18 by the electric capacity C12 and resistance R16 of series connection,
The control end of described reference voltage source D7 is also connected between described resistance R17 and resistance R18.
2. converter as claimed in claim 1 is it is characterised in that model L6599 of described control chip U1.
3. converter as claimed in claim 1 is it is characterised in that model PC817 of described photoelectrical coupler U2.
4. converter as claimed in claim 1 is it is characterised in that model KA431 of described reference voltage source D7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620643018.8U CN205945523U (en) | 2016-06-25 | 2016-06-25 | Half -bridge resonant mode DC DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620643018.8U CN205945523U (en) | 2016-06-25 | 2016-06-25 | Half -bridge resonant mode DC DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945523U true CN205945523U (en) | 2017-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620643018.8U Expired - Fee Related CN205945523U (en) | 2016-06-25 | 2016-06-25 | Half -bridge resonant mode DC DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945523U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108990216A (en) * | 2018-08-31 | 2018-12-11 | 大连昌正光电科技有限公司 | A kind of LED lamp power supply device and its light-dimming method |
| CN113867462A (en) * | 2021-09-30 | 2021-12-31 | 深圳安吉尔饮水产业集团有限公司 | Current source circuit |
-
2016
- 2016-06-25 CN CN201620643018.8U patent/CN205945523U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108990216A (en) * | 2018-08-31 | 2018-12-11 | 大连昌正光电科技有限公司 | A kind of LED lamp power supply device and its light-dimming method |
| CN113867462A (en) * | 2021-09-30 | 2021-12-31 | 深圳安吉尔饮水产业集团有限公司 | Current source circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170208 Termination date: 20170625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |