CN208571928U - A kind of high efficiency binary channels output Mono-pole switch power amplifier - Google Patents
A kind of high efficiency binary channels output Mono-pole switch power amplifier Download PDFInfo
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- CN208571928U CN208571928U CN201820800905.0U CN201820800905U CN208571928U CN 208571928 U CN208571928 U CN 208571928U CN 201820800905 U CN201820800905 U CN 201820800905U CN 208571928 U CN208571928 U CN 208571928U
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Abstract
A kind of high efficiency binary channels provided by the utility model exports Mono-pole switch power amplifier, including half-bridge inversion circuit, frequency converter CH1, frequency converter CH2, active clamp circuit, transformer；The half-bridge inversion circuit, frequency converter CH1, frequency converter CH2 are connected by transformer.TC-SSA circuit of the circuit based on active clamp, circuit structure is simple, it can be achieved that the single-stage power conversion and leakage inductance energy in two channels recycle, and has the advantages that high efficiency low distortion.The circuit, by being multiplexed TC-SSA circuit, significantly reduces switching tube and number transformer, simplifies circuit structure compared with using multiple single channel SSA.Meanwhile active clamp circuit greatly reduces the stress of switch tube voltage, and realizes leakage inductance and the utilization of filter inductance energy regenerating, improves system effectiveness.
Description
Technical field
The utility model relates to a kind of high efficiency binary channels to export Mono-pole switch power amplifier, belong to electricity field.
Background technique
Two-channel stereo audio frequency power amplifier has very extensive application, Mono-pole switch power amplifier (Single stage
Amplifier, SSA) SSA passes through DC bus without image of Buddha D class power amplifier like that and powers for multiple power amplifier channels, thus realizes SSA
Multichannel output is relatively difficult.And existing binary channels (Two Channel, TC) SSA circuit is complicated, each channel needs
A transformer is wanted, furthermore there is frequency converter Commutation Problem.
Utility model content
Technical problem: in order to solve the defects of prior art, the utility model provides a kind of high efficiency binary channels output
Mono-pole switch power amplifier.
Technical solution: a kind of high efficiency binary channels output Mono-pole switch power amplifier provided by the utility model, including half
Bridge inverter circuit, frequency converter CH1, frequency converter CH2, active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitor CP1, capacitor CP2, direct-current input power supplying Vdc；
The switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitor CP1With capacitor CP2Series circuit it is in parallel, it is in parallel
Circuit both ends respectively with direct-current input power supplying VdcAnode connected with cathode；
The frequency converter CH1 includes switching tube S11, switching tube S12, switching tube S14With switching tube S13, the switching tube
S11Source electrode and switching tube S12Source electrode connect to form two-way switch pipe S11-S12, the switching tube S14Source electrode and switching tube
S13Source electrode connect to form two-way switch pipe S14-S13；Switching tube S12Drain electrode and switching tube S13Drain electrode connection, and with filtering
Inductance L1One end connection；Filter inductance L1Other end and filter capacitor C1With load resistance R1It is formed by parallel circuit
Connection；Filter capacitor C1With load R1Parallel circuit other end is formed by connect with reference；
The frequency converter CH2 includes switching tube S21, switching tube S22, switching tube S24With switching tube S23, the switching tube
S21Source electrode and switching tube S22Source electrode connect to form two-way switch pipe S21-S22, the switching tube S24Source electrode and switching tube
S23Source electrode connect to form two-way switch pipe S24-S23；Switching tube S22Drain electrode and switching tube S23Drain electrode connection, and with filtering
Inductance L2One end connection；Filter inductance L2Other end and filter capacitor C2With load resistance R2It is formed by parallel circuit
Connection；Filter capacitor C2With load R2Parallel circuit other end is formed by connect with reference；
The half-bridge inversion circuit, frequency converter CH1, frequency converter CH2 are connected by transformer；
The transformer includes a primary coil and a secondary coil, and secondary coil is that the number of turns can be changed secondary coil；
Primary coil one end of transformer is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to electricity
Hold CP1With capacitor CP2Between；Secondary coil one end of transformer respectively with two-way switch pipe S11-S12, two-way switch pipe S21-S22
Connection, the other end respectively with two-way switch pipe S14-S13, two-way switch pipe S24-S23Connection；
The active clamp circuit includes clamping switch tube SC1, clamping switch tube SC2, clamp diode D1, clamp diode
D2, clamp diode D3, clamp diode D4, clamp diode D5, clamp diode D6, clamp capacitor C1, clamp capacitor C2；Institute
State clamping switch tube SC1Source electrode and clamping switch tube SC2Drain electrode connection, the clamp diode D1Two pole of anode and clamper
Pipe D2Cathode connection, the clamp diode D3Anode and clamp diode D4Cathode connection, the clamp diode D5
Anode and clamp diode D6Cathode connection, clamp capacitor C1With clamp capacitor C2Connection；The clamping switch tube SC1Leakage
Pole, diode D1Cathode, diode D3Cathode, diode D5Cathode and capacitor C1One end connection；The clamping switch tube
SC2Source electrode, diode D1Anode, diode D3Anode, diode D5Anode and capacitor C2One end connection；
The clamping switch tube SC1Source electrode and clamping switch tube SC2Drain electrode between with secondary coil and two-way switch pipe
S11-S12Connection；The clamp diode D1Anode and clamp diode D2Cathode between with secondary coil and two-way switch
Pipe S14-S13Between connect.
The utility model has the advantages that TC-SSA circuit of the circuit provided by the utility model based on active clamp, circuit structure is simple,
The single-stage power conversion and leakage inductance energy that two channels can be achieved recycle, and have the advantages that high efficiency low distortion.
The circuit is compared with using multiple single channel SSA, by being multiplexed TC-SSA circuit, significantly reducing switching tube and becoming
Depressor quantity, simplifies circuit structure.Meanwhile active clamp circuit greatly reduces the stress of switch tube voltage, and realizes
Leakage inductance and filter inductance energy regenerating utilize, and improve system effectiveness.
Detailed description of the invention
Fig. 1 is that high efficiency binary channels exports Mono-pole switch power amplifier figure.
Fig. 2 is TC-SSA modulation timing waveform diagram.
Fig. 3 is TC-SSA drive waveforms generation circuit.
Fig. 4 is the former secondary side phase shift modulation timing waveform of TC-SSA.
Fig. 5 is the pulse-width modulation waveform and waveform input signal in the channel CH1 and the channel CH2.
Fig. 6 is that output voltage electric current and pulse-width modulation waveform are distinguished in the channel CH1 and the channel CH2.
Fig. 7 is the voltage waveform that the channel CH1 and the channel CH2 export different frequency respectively.
Specific embodiment
The utility model high efficiency binary channels output Mono-pole switch power amplifier is further illustrated below.
High efficiency binary channels exports Mono-pole switch power amplifier, sees Fig. 1, including half-bridge inversion circuit, frequency converter
CH1, frequency converter CH2, active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitor CP1, capacitor CP2, direct-current input power supplying Vdc；
The switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitor CP1It is in parallel with the series circuit of capacitor CP2, and
Join circuit both ends respectively with direct-current input power supplying VdcAnode connected with cathode；
The frequency converter CH1 includes switching tube S11, switching tube S12, switching tube S14With switching tube S13, the switching tube
S11Source electrode and switching tube S12Source electrode connect to form two-way switch pipe S11-S12, the switching tube S14Source electrode and switching tube
S13Source electrode connect to form two-way switch pipe S14-S13；Switching tube S12Drain electrode and switching tube S13Drain electrode connection, and with filtering
One end of inductance L1 connects；The other end and filter capacitor C of filter inductance L11With load resistance R1It is formed by parallel circuit
Connection；Filter capacitor C1With load R1Parallel circuit other end is formed by connect with reference；
The frequency converter CH2 includes switching tube S21, switching tube S22, switching tube S24With switching tube S23, the switching tube
S21Source electrode and switching tube S22Source electrode connect to form two-way switch pipe S21-S22, the switching tube S24Source electrode and switching tube
S23Source electrode connect to form two-way switch pipe S24-S23；Switching tube S22Drain electrode and switching tube S23Drain electrode connection, and with filtering
Inductance L2One end connection；Filter inductance L2Other end and filter capacitor C2With load resistance R2It is formed by parallel circuit
Connection；Filter capacitor C2With load R2Parallel circuit other end is formed by connect with reference；
The half-bridge inversion circuit, frequency converter CH1, frequency converter CH2 are connected by transformer；
The transformer includes a primary coil and a secondary coil, and secondary coil is that the number of turns can be changed secondary coil；
Primary coil one end of transformer is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to electricity
Hold CP1With capacitor CP2Between；Secondary coil one end of transformer respectively with two-way switch pipe S11-S12, two-way switch pipe S21-S22
Connection, the other end respectively with two-way switch pipe S14-S13, two-way switch pipe S24-S23Connection；
The active clamp circuit includes clamping switch tube SC1, clamping switch tube SC2, clamp diode D1, clamp diode
D2, clamp diode D3, clamp diode D4, clamp diode D5, clamp diode D6, clamp capacitor C1, clamp capacitor C2；Institute
State clamping switch tube SC1Source electrode and clamping switch tube SC2Drain electrode connection, the clamp diode D1Two pole of anode and clamper
Pipe D2Cathode connection, the clamp diode D3Anode and clamp diode D4Cathode connection, the clamp diode D5
Anode and clamp diode D6Cathode connection, clamp capacitor C1With clamp capacitor C2Connection；The clamping switch tube SC1Leakage
Pole, diode D1Cathode, diode D3Cathode, diode D5Cathode and capacitor C1One end connection；The clamping switch tube
SC2Source electrode, diode D1Anode, diode D3Anode, diode D5Anode and capacitor C2One end connection；
The clamping switch tube SC1Source electrode and clamping switch tube SC2Drain electrode between with secondary coil and two-way switch pipe
S11-S12Connection；The clamp diode D1Anode and clamp diode D2Cathode between with secondary coil and two-way switch
Pipe S14-S13Between connect.
The working principle of the device:
See Fig. 2 and 3, transformer secondary square-wave voltage VEFIt is shared by two channels CH1, CH2.The channel CH1 frequency converter
Two-way switch pipe driving signal S11/S12With S13/S14For complementation conducting.The channel CH2 frequency converter two-way switch pipe driving signal
S21/S22With S23/S24Complementation conducting.Active clamping switch tube SC1、SC4With SC2、SC3Respectively with primary side switch pipe SP1、SP2It keeps
Synchronous, dead time drives slightly long than primary side switch pipe.vin1、vin2The respectively audio signal in the channel CH1, CH2, with carrier wave
Signal, which compares, generates two-way pwm pulse, is modulated respectively to the frequency converter in two channels.
The channel CH1, CH2 output voltage vo1And vo2It indicates, vo1And vo2For
D in formula1、d2It respectively indicates CH1 and CH2 and exports PWM wave duty ratio.Duty ratio d1With carrier amplitude VM, audio input
Signal vin1Meet relationship
Convolution (1), (2) can obtain
It can similarly obtain
By formula (3) and formula (4) it is found that the channel CH1, CH2 output voltage vo1And vo2Only input signal with each channel
vin1And vin2Related, audio signal amplification factor is Vdc/(2nVM), i.e., two channels can be realized independent Linear Amplifer.
Claims (1)
1. a kind of high efficiency binary channels exports Mono-pole switch power amplifier, it is characterised in that: become including half-bridge inversion circuit, cycle
Parallel operation CH1, frequency converter CH2, active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitorC P1, capacitorC P2, direct-current input power supplyingV dc；It is described
Switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and and capacitorC P1And capacitorC P2Series circuit it is in parallel, parallel circuit
Both ends respectively with direct-current input power supplyingV dcAnode connected with cathode；
The frequency converter CH1 includes switching tube S11, switching tube S12, switching tube S14With switching tube S13, the switching tube S11's
Source electrode and switching tube S12Source electrode connect to form two-way switch pipe S11-S12, the switching tube S14Source electrode and switching tube S13's
Source electrode connects to form two-way switch pipe S14-S13；Switching tube S12Drain electrode and switching tube S13Drain electrode connection, and and filter inductance
L1One end connection；Filter inductance L1Other end and filter capacitor C1With load resistance R1It is formed by parallel circuit connection；
Filter capacitor C1With load R1Parallel circuit other end is formed by connect with reference；
The frequency converter CH2 includes switching tube S21, switching tube S22, switching tube S24With switching tube S23, the switching tube S21's
Source electrode and switching tube S22Source electrode connect to form two-way switch pipe S21-S22, the switching tube S24Source electrode and switching tube S23's
Source electrode connects to form two-way switch pipe S24-S23；Switching tube S22Drain electrode and switching tube S23Drain electrode connection, and and filter inductance
L2One end connection；Filter inductance L2Other end and filter capacitor C2With load resistance R2It is formed by parallel circuit connection；
Filter capacitor C2With load R2Parallel circuit other end is formed by connect with reference；
The half-bridge inversion circuit, frequency converter CH1, frequency converter CH2 are connected by transformer；
The transformer includes a primary coil and two secondary coils, and two secondary coils are that the number of turns can be changed secondary coil；
Primary coil one end of transformer is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to electricity
HoldC P1And capacitorC P2Between；The the first secondary coil Same Name of Ends and two-way switch pipe S of transformer11-S12, two-way switch pipe S21-
S22Connection, different name end are connect with reference；Second subprime coil different name end and two-way switch pipe S14-S13, two-way switch pipe S24-
S23Connection, Same Name of Ends are connect with reference；
The active clamp circuit includes clamping switch tube SC1, clamping switch tube SC2, clamp diode D1, clamp diode D2、
Clamp diode D3, clamp diode D4, clamp diode D5, clamp diode D6, clamp capacitorC 1, clamp capacitorC 2；It is described
Clamping switch tube SC1Source electrode and clamping switch tube SC2Drain electrode connection, the clamp diode D1Anode and clamp diode
D2Cathode connection, the clamp diode D3Anode and clamp diode D4Cathode connection, the clamp diode D5's
Anode and clamp diode D6Cathode connection, clamp capacitorC 1And clamp capacitorC 2Connection；The clamping switch tube SC1Leakage
Pole, diode D1Cathode, diode D3Cathode, diode D5Cathode and capacitor C1One end connection；The clamping switch tube
SC2Source electrode, diode D1Anode, diode D3Anode, diode D5Anode and capacitor C2One end connection；
The clamping switch tube SC1Source electrode and clamping switch tube SC2Drain electrode between with the first secondary coil Same Name of Ends and two-way
Switching tube S11-S12Connection；The clamp diode D1Anode and clamp diode D2Cathode between with second subprime coil
Different name end and two-way switch pipe S14-S13Between connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820800905.0U CN208571928U (en) | 2018-05-28 | 2018-05-28 | A kind of high efficiency binary channels output Mono-pole switch power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820800905.0U CN208571928U (en) | 2018-05-28 | 2018-05-28 | A kind of high efficiency binary channels output Mono-pole switch power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208571928U true CN208571928U (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820800905.0U Expired - Fee Related CN208571928U (en) | 2018-05-28 | 2018-05-28 | A kind of high efficiency binary channels output Mono-pole switch power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208571928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923655A (en) * | 2018-05-28 | 2018-11-30 | 钟曙 | A kind of high efficiency binary channels output Mono-pole switch power amplifier |
-
2018
- 2018-05-28 CN CN201820800905.0U patent/CN208571928U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923655A (en) * | 2018-05-28 | 2018-11-30 | 钟曙 | A kind of high efficiency binary channels output Mono-pole switch power amplifier |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190301 Termination date: 20210528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |