CN208209905U - A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation - Google Patents

A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation Download PDF

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Publication number
CN208209905U
CN208209905U CN201820802194.0U CN201820802194U CN208209905U CN 208209905 U CN208209905 U CN 208209905U CN 201820802194 U CN201820802194 U CN 201820802194U CN 208209905 U CN208209905 U CN 208209905U
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China
Prior art keywords
switching tube
diode
connection
capacitor
clamp diode
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Expired - Fee Related
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CN201820802194.0U
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Chinese (zh)
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钟曙
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Abstract

The efficient binary channels Mono-pole switch power amplifier of a kind of integrated DC-DC transformation provided by the utility model, including half-bridge inversion circuit, frequency converter CH1, frequency converter CH2, the diode-capacitive absorption circuit, transformer for integrating DC-DC converter；The half-bridge inversion circuit, frequency converter CH1, frequency converter CH2 are connected by transformer.The circuit is the efficient TC-SSA circuit of integrated DC-DC transformation, the circuit do not need using active switch pipe can real frequency converter switching tube the reliable change of current, realize binary channels single-stage power conversion audio enlarging function, realize transformer secondary voltage clamping, perceptual energy recovery function, it also avoids using active clamping switch tube, circuit is simple.

Description

A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation
Technical field
The utility model relates to a kind of efficient binary channels Mono-pole switch power amplifiers of integrated DC-DC transformation, 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.Existing binary channels (Two Channel, TC) SSA circuit is complicated, each channel requires one A transformer, furthermore there are Commutation Problems for frequency converter, thus lead to extremely complex active clamp circuit.
Utility model content
Technical problem: in order to solve the defects of prior art, the utility model provides a kind of height of integrated DC-DC transformation Imitate binary channels Mono-pole switch power amplifier.
A kind of technical solution: efficient binary channels Mono-pole switch power amplifier electricity of integrated DC-DC transformation provided by the utility model Road, including half-bridge inversion circuit, frequency converter CH1, frequency converter CH2, the diode-capacitor for integrating DC-DC converter Absorbing 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；
Diode-capacitive absorption circuit of integrated DC-DC converter includes clamp diode D1, clamp diode D2, clamper Diode D3, clamp diode D4, clamp diode D5, clamp diode D6, clamp diode D7, clamp diode D8, clamper Capacitor C1, clamp capacitor C2, clamping switch tube SD1, clamping switch tube SD2；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, the clamp diode D7Anode and clamp diode D8Cathode connection, clamper Capacitor C1With clamp capacitor C2Connection；The clamping switch tube SD1Source electrode and clamping switch tube SD2Drain electrode connection；Described two Pole pipe D1Cathode, diode D3Cathode, diode D5Cathode, diode D7Cathode, capacitor C1One end, clamping switch tube SC1Drain electrode connection；The diode D1Anode, diode D3Anode, diode D5Anode, diode D7Anode, Capacitor C2, clamping switch tube SC2Source electrode connection；The clamp diode D1Anode and clamp diode D2Cathode between with Secondary coil and two-way switch pipe S11-S12Connection；The clamp diode D3Anode and clamp diode D4Cathode between With secondary coil and two-way switch pipe S14-S13Between connect；Switching tube SD1Drain electrode and switching tube SD2Drain electrode between with filtering Inductance L3One end connection；Filter inductance L3Other end and filter capacitor C3With load resistance R3It is formed by parallel circuit Connection；Filter capacitor C3With load R3Parallel circuit other end is formed by connect with reference.
The utility model has the advantages that circuit provided by the utility model is the efficient TC-SSA circuit of integrated DC-DC transformation, the circuit is not Need using active switch pipe can real frequency converter switching tube the reliable change of current, realize binary channels single-stage power conversion Audio enlarging function realizes transformer secondary voltage clamping, perceptual energy recovery function, it is thus also avoided that open using active clamp Guan Guan, circuit are simple.
Detailed description of the invention
Fig. 1 is the efficient binary channels Mono-pole switch power amplifier figure of integrated DC-DC transformation；
Fig. 2 is TC-SSA modulation timing waveform diagram；
Fig. 3 is TC-SSA drive waveforms generation circuit figure.
Fig. 4 is sawtooth carrier wave waveform and former secondary side drive signal waveform.
Fig. 5 is primary side current of transformer and secondary voltage waveform.By Fig. 5, it can be seen that, voltage is not present in transformer secondary Spike.
Specific embodiment
The efficient binary channels Mono-pole switch power amplifier for integrating DC-DC transformation to the utility model below is made furtherly It is bright.
The efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation, is shown in Fig. 1, including half-bridge inversion circuit, cycle Converter CH1, frequency converter CH2, the diode-capacitive absorption circuit, transformer for integrating DC-DC converter；
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；
Diode-capacitive absorption circuit of integrated DC-DC converter includes clamp diode D1, clamp diode D2, clamper Diode D3, clamp diode D4, clamp diode D5, clamp diode D6, clamp diode D7, clamp diode D8, clamper Capacitor C1, clamp capacitor C2, clamping switch tube SD1, clamping switch tube SD2；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, the clamp diode D7Anode and clamp diode D8Cathode connection, clamper Capacitor C1With clamp capacitor C2Connection；The clamping switch tube SD1Source electrode and clamping switch tube SD2Drain electrode connection；Described two Pole pipe D1Cathode, diode D3Cathode, diode D5Cathode, diode D7Cathode, capacitor C1One end, clamping switch tube SC1Drain electrode connection；The diode D1Anode, diode D3Anode, diode D5Anode, diode D7Anode, Capacitor C2, clamping switch tube SC2Source electrode connection；The clamp diode D1Anode and clamp diode D2Cathode between with Secondary coil and two-way switch pipe S11-S12Connection；The clamp diode D3Anode and clamp diode D4Cathode between With secondary coil and two-way switch pipe S14-S13Between connect；Switching tube SD1Drain electrode and switching tube SD2Drain electrode between with filtering Inductance L3One end connection；Filter inductance L3Other end and filter capacitor C3With load resistance R3It is formed by parallel circuit Connection；Filter capacitor C3With load R3Parallel circuit other end is formed by connect with reference.
The working principle of the circuit, is shown in Fig. 2 and 3:
Primary side CP1、CP2、SP1And SP2Form half-bridge inversion circuit, transformer secondary square-wave voltage VEFBy CH1, CH2 two Channel shares.Active clamp circuit clamping switch tube SC1~SC2, clamp diode D1~D6And clamp capacitor C1~C2Composition. 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 synchronizing, dead time drives slightly long than primary side switch pipe.vin1、vin2Respectively CH1, CH2 are logical The audio signal in road generates two-way pwm pulse compared with carrier signal, adjusts respectively to the frequency converter in two channels System.
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.With It is compared using multiple single channel SSA, TC-SSA is significantly reduced switching tube and number transformer, simplified by circuit multiplexer Circuit structure.Pass through diode D1~D4With capacitor C1、C2, by transformer secondary voltage VEFClamper；Pass through diode D5~D8With Capacitor C1、C2, by the channel CH1 P1Point and the channel CH2 P2Voltage clamping at point.Leakage inductance energy and filter inductance energy pass through two poles Pipe D1~D8It is recycled to capacitor C1、C2, and exported by DC-DC converter, it powers for auxiliary circuit.

Claims (1)

1. a kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation, it is characterised in that: including semi-bridge inversion electricity Road, frequency converter CH1, frequency converter CH2, diode-capacitive absorption circuit, integrated DC-DC converter, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitor CP1, capacitor CP2, direct-current input power supplying Vdc；It is described Switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitor CP1With capacitor CP2Series circuit it is in parallel, 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 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 a secondary coil, and secondary coil is that the number of turns can be changed secondary coil；Transformation Primary coil one end of device is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to capacitor CP1 With capacitor CP2Between；Secondary coil one end of transformer respectively with two-way switch pipe S11-S12, two-way switch pipe S21-S22Connection, The other end respectively with two-way switch pipe S14-S13, two-way switch pipe S24-S23Connection；
The diode-capacitive absorption circuit includes clamp diode D1, clamp diode D2, clamp diode D3, two pole of clamper Pipe D4, clamp diode D5, clamp diode D6, clamp diode D7, clamp diode D8, clamp capacitor C1, clamp capacitor C2、 Clamping switch tube SD1, clamping switch tube SD2；The clamp diode D1Anode and clamp diode D2Cathode connection, it is described Clamp diode D3Anode and clamp diode D4Cathode connection, the clamp diode D5Anode and clamp diode D6Cathode connection, the clamp diode D7Anode and clamp diode D8Cathode connection, clamp capacitor C1With clamp capacitor C2 Connection；The clamping switch tube SD1Source electrode and clamping switch tube SD2Drain electrode connection；The diode D1Cathode, diode D3Cathode, diode D5Cathode, diode D7Cathode, capacitor C1One end, clamping switch tube SC1Drain electrode connection；It is described Diode D1Anode, diode D3Anode, diode D5Anode, diode D7Anode, capacitor C2, clamping switch tube SC2Source electrode connection；The clamp diode D1Anode and clamp diode D2Cathode between with secondary coil and two-way opened Close pipe S11-S12Connection；The clamp diode D3Anode and clamp diode D4Cathode between with secondary coil and two-way Switching tube S14-S13Between connect；
The integrated DC-DC converter includes switching tube SD1, switching tube SD2, filter inductance L3, filter capacitor C3And load resistance R3；Switching tube SD1Drain electrode and switching tube SD2Drain electrode between with filter inductance L3One end connection；Filter inductance L3In addition One end and filter capacitor C3With load resistance R3It is formed by parallel circuit connection；Filter capacitor C3With load R3It is formed by simultaneously Connection circuit other end is connect with reference.
CN201820802194.0U 2018-05-28 2018-05-28 A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation Expired - Fee Related CN208209905U (en)

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CN201820802194.0U CN208209905U (en) 2018-05-28 2018-05-28 A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation

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Application Number Priority Date Filing Date Title
CN201820802194.0U CN208209905U (en) 2018-05-28 2018-05-28 A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108832902A (en) * 2018-05-28 2018-11-16 钟曙 A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108832902A (en) * 2018-05-28 2018-11-16 钟曙 A kind of efficient binary channels Mono-pole switch power amplifier of integrated DC-DC transformation

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Granted publication date: 20181207

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