Class D Audio Power Amplifier Using IRS2092 - …

1 Design KitClass D Audio Amplifier Using IRS20921 All Rights Reserved Copyright (c) Bee Technologies Inc. 2009 Slide # Frequency Note: Po[W] vs. Vin[VPEAK] .. vs. Measured Gain Oscillation on loss in the Standard Professional Standard vs. Professional circuit vs. switching output Circuit .. Performance of the circuit with different .. Index ..34-56-78-9101112-1415-1617-1819-2122-2 526-272829-3031-3334-3536-3839-4142-4445 -4748 Contents2 All Rights Reserved Copyright (c) Bee Technologies Inc. 20091. Specifications3 General Test ConditionsSimulation folderSupply Voltage+15 VLoad Impedance8-4 Self-Oscillating Frequency400kHzGain Setting24dBElectrical DataOutput Power 25W(1kHz, 4 )Efficiency93%(25W, 4 )[Efficiency] Audio PerformanceDistortionLess than (1kHz, 4 , 10W)[THD]Frequency Response : 20Hz~20kHz+1dB(20 ~ 20000 Hz, 4 , 2V Output)[FrqRsp]All Rights Reserved Copyright (c) Bee Technologies Inc.

2 20094 Condition : Po = 25[W], 4 LoadAnalysisTime Domain (Transient)Run to time: 3msStart saving data after: 1msMaximum step size: 100n Skip the initial transient bias point calculation (SKIPBP).OptionsRELTOL: : : : : : 500 ITL2: 200 ITL4: 10 Specifications : Efficiency Evaluation CircuitTEST CONDITION:C41nF0+B15V+ :Po = 25 WGv = L = 4f in = 1kHzC14 MMH250K684R4220C710uIC = 10R23kR1100kC1022uIC = 15 LOAD{RL}OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C OMPR5820-BHOR1510 LOVR175-B-15V0C210uIC = 7C810uIC = 7R1110kV1 FREQ = {f in}VAMPL = { *SQRT(Po*RL)/Gv }VOFF = +C16 EKMG500 ELL222 MLP1SC17 RPER11H104K2K1A01BR1210kC3 RPER11H103K2K1A01B+C1 EKMG500 ELL100ME11DC6 AMZ0050J102F ET1 IRFIZ24NF ET2 IRFIZ24 NLs120nH12Ls220nH12Ls320nH12Ls420nH12Ls5 20nH12 All Rights Reserved Copyright (c) Bee Technologies Inc.

3 20095 PSUPPLY[W]PO[W]%EfficiencySpecifications : Efficiency Simulation ResultAll Rights Reserved Copyright (c) Bee Technologies Inc. 2009C41nF0+B15V+ :Po = 10Gv = L = 4f in = 1kC14 MMH250K684R4220C710uIC = 10R23kR1100kC1022uIC = 15F ET1 IRFIZ24NF ET2 IRFIZ24 NTEST CONDITION:LOAD{RL}OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C OMPR5820HO-BR1510 LOVR175-B-15V0C210uIC = 7C810uIC = 7R1110kV1 FREQ = 1kVAMPL = { *SQRT(Po*RL)/Gv }VOFF = +C16 EKMG500 ELL222 MLP1SC310uIC = 14Ls520nH12C17 RPER11H104K2K1A01BR1210k6 Condition : fin= 1kHz, Po = 10[W], 4 LoadAnalysisTime Domain (Transient)Run to time: 3msStart saving data after: 0sMaximum step size: 100n Skip the initial transient bias point calculation (SKIPBP)Output File Perform Fourier AnalysisCenter Frequency: 1khzOutput Variables: V(OUT).

4 OptionsRELTOL: : : : : : 500 ITL2: 200 ITL4: 10 Specifications : THD Evaluation CircuitAll Rights Reserved Copyright (c) Bee Technologies Inc. 20097 HARMONICFREQUENCYFOURIERNORMALIZEDPHASEN ORMALIZEDNO(HZ)COMPONENTCOMPONENT(DEG) + + + + + + + + + + + + + + + + + + + + + + + + + + + + +03 TOTAL HARMONIC DISTORTION = : THD Simulation ResultAll Rights Reserved Copyright (c) Bee Technologies Inc. 20098 Condition : 20 ~ 20000 Hz, 4 Load, 2V OutputAnalysisTime Domain (Transient)Run to time: 2msStart saving data after: 0msMaximum step size: 100n Skip the initial transient bias point calculation (SKIPBP)Parametric Sweep Global parameterParameter name: RL Value list: 4, : : : : : : 500 ITL2: 200 ITL4: 10 Specifications : Frequency Response Evaluation Circuit0C41nF+B15V+ = = {RL}OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C OMPR5820HO-BR1510 LOVR175-B-15V0C210uIC = 7C810uIC = 7R1110kV1 FREQ = {f in}VAMPL = { *VOUT/Gv }VOFF = +C16 EKMG500 ELL222 MLP1 SLs520nH12C17 RPER11H104K2K1A01BR1210kPARAMETERS:R L = 8 VOUT = 2Gv = in = 20k+C1 EKMG500 ELL100ME11DC6 AMZ0050J102C3 RPER11H103K2K1A01 BTEST CONDITION.

5 F ET1 IRFIZ24NF ET2 IRFIZ24 NAll Rights Reserved Copyright (c) Bee Technologies Inc. 20099 VOUT+1dB (8 Load @ 20kHz)VOUT- (4 Load @ 20kHz)Specifications : Frequency Response Simulation ResultAll Rights Reserved Copyright (c) Bee Technologies Inc. 200910 Po [W] = Power output Rload [ ] = Load resistance GV= Amplifier voltage gain [ ]= Note : PO[W] vs. VIN[VPEAK]All Rights Reserved Copyright (c) Bee Technologies Inc. 2009+-SPEAKERF120AF ET1 IRFIZ24NF ET2 IRFIZ24N+C1 EKMG500 ELL100ME11DC6 AMZ0050J102C3 RPER11H103K2K1A01BV1 FREQ = {f in}VAMPL = { *VOUT/Gv }VOFF = 00C41nF+B15V+ = 10R23kR1100kC1022uIC = 15 OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C OMPHOR5820-BR1510 LOVR175-B-15V0C210uIC = 7C810uIC = +C16 EKMG500 ELL222 MLP1 SLs520nH12C17 RPER11H104K2K1A01BR1210kPARAMETERS:VOUT = 2Gv = in = 1kVVVVVV11 Class D Amplifier circuit are simulated and compared with measured waveforms from oscilloscope (Tektronix: TDS3054B)2.

6 Waveforms EvaluationAll Rights Reserved Copyright (c) Bee Technologies Inc. 200912 OUTVSS imulatedMeasured3. Simulated vs. Measured Waveform (1/3)All Rights Reserved Copyright (c) Bee Technologies Inc. 200913 HOLOS imulatedMeasured3. Simulated vs. Measured Waveform (2/3)All Rights Reserved Copyright (c) Bee Technologies Inc. 200914 COMPS imulatedMeasured3. Simulated vs. Measured Waveform (3/3)All Rights Reserved Copyright (c) Bee Technologies Inc. 2009+C1 EKMG500 ELL100ME11DC6 AMZ0050J102C3 RPER11H103K2K1A01BF ET1 IRFIZ24NF ET2 IRFIZ24N+-SPEAKERF120AV1 FREQ = {Freq}VAMPL = = 00C41nF+B15V+ = 10R2{RIN}R1100kC1022uIC = 15 OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSSC OMP0 HOR5820-BLOR1510VR175-B-15V0C210uIC = 7C810uIC = +C16 EKMG500 ELL222 MLP1 SLs520nH12C17 RPER11H104K2K1A01BR1210kPARAMETERS:Freq = 1kRIN = 3k15 RIN= ,3k RFB=47k = AnalysisTime Domain (Transient)Run to time: 1msStart saving data after: 100nMaximum step size: 100n Skip the initial transient bias point calculation (SKIPBP)Sweep variable Global parameter: RIN Value list: , : : : : : : 500 ITL2: 200 ITL4: 104.

7 Voltage gain of the Amplifier GV All Rights Reserved Copyright (c) Bee Technologies Inc. 200916GV = 26dBGV = 24dB4. Voltage gain of the Amplifier GV All Rights Reserved Copyright (c) Bee Technologies Inc. 2009+-SPEAKERF120AF ET1 IRFIZ24NF ET2 IRFIZ24N+C1 EKMG500 ELL100ME11DC6 AMZ0050J102C3 RPER11H103K2K1A01BV1 FREQ = 1kVAMPL = 0 VOFF = 00C41nF+B15V+ = 10R23kR1100kC1022uIC = 15 OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C OMPHOR5820-BR1510 LOVR175-B-15V0C210uIC = 7C810uIC = +C16 EKMG500 ELL222 MLP1 SLs520nH12C17 RPER11H104K2K1A01BR1210k17 Self oscillating frequency is design by setting the following items Integration capacitors. Integration capacitors:C4=C5 Integration resistor:R4+VR1 AnalysisTime Domain (Transient)Run to time: 1msStart saving data after: step size: 40n Skip the initial transient bias point calculation (SKIPBP).

8 OptionsRELTOL: : : : : : 500 ITL2: 200 ITL4: 105. Self-Oscillating FrequencyAll Rights Reserved Copyright (c) Bee Technologies Inc. 200918 Self-oscillation frequency= 400kHz (Simulated)Self-oscillation frequency= 400kHz (Measured)SimulatedMeasuredOUTOUTVSVS5. Self-Oscillating FrequencyAll Rights Reserved Copyright (c) Bee Technologies Inc. 2009+-SPEAKERF120AF ET1 IRFIZ24NF ET2 IRFIZ24N+C1 EKMG500 ELL100ME11DC6 AMZ0050J102C3 RPER11H103K2K1A01BV1 FREQ = 1kVAMPL = 0 VOFF = 00C41nF+B15V+ = 10R23kR1100kC1022uIC = 15 OUTC922uIC = + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C OMPHOR5820-BR1510 LOVR175-B-15V0C210uIC = 7C810uIC = +C16 EKMG500 ELL222 MLP1 SLs520nH12C17 RPER11H104K2K1A01BR1210k6. Dead-time19 Dead-time ModeR20R21DT1 (25ns) (40ns) (65ns) (105ns)-< 10kV(DT) Voltage DividerAnalysisTime Domain (Transient)Run to time: 1msStart saving data after: step size: 40n Skip the initial transient bias point calculation (SKIPBP).

9 OptionsRELTOL: : : : : : 500 ITL2: 200 ITL4: 10 All Rights Reserved Copyright (c) Bee Technologies Inc. 2009 Dead-time DT1(25ns)20DT1(25ns)DT1(25ns)Spike voltageAll Rights Reserved Copyright (c) Bee Technologies Inc. 2009 Dead-time DT3(65ns)21DT3(65ns)DT3(65ns)Spike voltages(Decrease for longer dead time)All Rights Reserved Copyright (c) Bee Technologies Inc. +C1 EKMG500 ELL100ME11DC6 AMZ0050J102C3 RPER11H103K2K1A01BC222uIC = 0F ET1 IRFIZ24NF ET2 IRFIZ24NC822uIC = 0C922uIC = 0C1022uIC = 0+-SPEAKERF120AV1 FREQ = 1kVAMPL = 0 VOFF = 00C41nF+B15VC710uIC = 0+ + OMPCSDVSSVREFOCSETDTCOMLOVCCVSHOVBCSHVCC 0 DTVSS0C +C16 EKMG500 ELL222 MLP1 SLs520nH12C17 RPER11H104K2K1A01BR1210kAll Rights Reserved Copyright (c) Bee Technologies Inc. 200922C7: 10u, 5u, and FAnalysisTime Domain (Transient)Run to time: 975msStart saving data after: 100nMaximum step size: 100u Skip the initial transient bias point calculation (SKIPBP).

10 OptionsRELTOL: : : 1nCHGTOL: : : 500 ITL2: 200 ITL4: 107. Turn-on transient Start-up sequencing is achieved through the charging of the CSD voltage (C7). Simulation will show how capacitors are charged to complete the sequence for each capacitance (VAA)V(VSS)V(CSD)V(LO)V(HO)V(VCC,COM)V(V B,VS)Vth1___Vth2___Class D Startup@ transient: C7 = 10uFAll Rights Reserved Copyright (c) Bee Technologies Inc. 200924V(VAA)V(VSS)V(CSD)V(LO)V(HO)V(VCC, COM)V(VB,VS)Vth1 Vth2 Class D Startup@ transient: C7 = 5uFAll Rights Reserved Copyright (c) Bee Technologies Inc. 2009 All Rights Reserved Copyright (c) Bee Technologies Inc. 200925V(VAA)V(VSS)V(CSD)V(LO)V(HO)V(VCC, COM)V(VB,VS)Vth1 Vth2 Class D Startup@ transient: C7 = This simulation shows how voltage and current are applied to each components at the maximum load condition (25W,4ohm).