Transcription of 群馬大学大学院 工学研究科 ... - el.gunma-u.ac.jp
1 1 26 LSI WasedaD 2 D D D 3 D D D 4 20-20kHz HP D D D 6D PWM D PWM LC NFB LPFLPF D LC PWM LPF EMI EMI 7D PWM LC PWM PWM PWM 8 PWM PWM Pulse Width Modulation D PWM 9 Half Bridge VInput LevelShifterLevelShifterD LCLPF 2 2 10 Full Bridge H Bridge VInput LevelShifterLevelShifterVDDL evelShifterLevelShifter 3 11 MOSFET MOSFET VDD LvelShifterLevelShifterM1 M1 M2 M2-VDD LPF 12D
2 OFFONOFFONOFFONV inputVoutputDead timeV1V2M1 M2 OFFONOFFONOFFON LevelShifterLevelShifterM1M2 VinputVoutputV1V2 VDDMOSFET 13D LevelShifterLevelShifterM1M2 VinputVoutputV1V2 OFFONOFFONOFFONV inputVoutputDead timeV1V2M1 M2 VDDD 14 MOSFET D MOSFET 20ns MOSFET MOSFET LC EMI 1 15 20-20kHz EMI 16 LC L1L C1C == ==LccLRfCCfRLL 2122122221RL 8 Fc=40kHz L1= 17 ( )Frequency / Hertz100m200m400m1241020401002004001k2k4 k10k20k40k100k200k400k1 MdBV(Probe3-P-Probe3-N)
3 2 +6dB +6dB0 dB-10 dB40kHz3dB 18 EMI Frequency / Hertz100k200k500k1M2M5M10 MdB-180-160-140-120-100-80-60-40-200 FFT 19D FFT LC 3 LPF FFT 20 D D D 21 +-A++ N =R2/(R1+R2) DVinVoutA++ N DVinVout ..)(1111111)(DNAVVDANAVAAVDNVVAVDNVAV inoutinoutoutinoutinout+ + ++ ++ +=++ =++ = A 100dB D Vin R1R2 A 22 D D D 23 D PWM Vinpp LCLPFVDDVPWMVoutA2A3=1A1 VTriangleDDTriangleinppPWMDDT rianglePWMinpp321 VVVVVVVVAAAA total = = =Vinpp=1[V] VTriangle= [V] VDD=40[V]
4 Atotal= 2 Atotal= 100dB 24 PWM LPF LPF time/mSecs500 time/mSecs5 LCLPFPOWER Vout D A1A2A1++ N1 D1 Vout+ PWM C ( 400-650kHz)LCLPF A2 + N2 Power MOSFETPOWER MOSFET PSRR=0dB + D2 Vin C LCLPF leftintotaloutleftinoutCDDANNAVAVCDNADNV AV++ ++ + =+++ ++ =212212222111)( 26D N2+-Vin R1R2 D A1++ N1 D1+ PWM C ( 400-650kHz)LCLPF A2 +Power MOSFET+ D2 VoutLPFlefttotaltotalintotaltotaloutleft outtotalintotalouttotalleftoutinoutCDNAD NAAVAAVCDNADNVAVAVAAACDNADNAVVV++ +++ ++ +=+++++ == +++++ =)(11)(11)())((221122221121222111 Atotal 27 PWM VPWMPWM + 80 VppLPF Vpp1 orderButterworth LPFVPWM+-80 VppLPF PWM + Vpp LPF 0-20kHz 1kHz 400kHzLPF CUTOFF 33kHz Demo 28 PWM Frequency/kHertz2kHertz/div0246810121416 1820 Spectrum(LAP2-OUTP) / dB-100-80-60-40-20020 Frequency/kHertz2kHertz/div0246810121416 1820 Spectrum(Probe1-NODE)
5 / =0 = 29 Frequency/kHertz2kHertz/div0246810121416 1820 Spectrum(Probe1-NODE) / dB-100-80-60-40-20020 Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(Probe1-NODE) / dB-100-80-60-40-20020 = = 30 1 orderButterworth LPF+-80 Vpp VppLPF leftFBinoutleftFBinoutleftFBoutinoutCCDN AAVAAVACCAADNAAVAAVCDNACVVV+++ +++ >> + + ++ +++=+++ =)(1111)(11)( PWM + CFB 31 32 D D D 33 EMI 34 D D D 35 Vpp1 orderButterworth LPF+-80 VppLPF Time/mSecs200 / V-2-1012 Time/mSecs5 / V-2-1012 PWM + 1 orderButterworth LPF 36 1 Fc=200kHz-80-70-60-50-40-30-20-10 Frequency /
6 Hertz1k2k4k10k20k40k100k200k400k1M2M4M10 MdB-35-30-25-20-15-10-5Fc=100kHzFc=200kH zFc=100kHzPWM 400kHz Fc=200kHz 1 Fc=100kHz 1 400 KHz 20kHz phaseGain 37 Vpp1 orderButterworth LPF+-80 VppLPF +- PWM + Time/uSecs1uSecs/div988989990991992993V- 4-3-2-10123 38 Vpp1 orderButterworth LPF+-80 VppLPF ++PWM + Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(Probe1-NODE) / dB-100-80-60-40-20020 Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(Probe1-NODE) / dB-100-80-60-40-20020 Time/mSecs1 39 EMI 40 VInput LevelShifterLevelShifterVDDL evelShifterLevelShifter 41 400kHz Frequency / Hertz100k200k500k1M2M5M10 MSpectrum(E3-P) / dB-50-40-30-20-10010400kHz 42 VInput 400kHzGND time/mSecs200 / Hertz1002004001k2k4k10k20k40k100k400k1M2 M4M10 MdB-160-140-120-100-80-60-40-200 FFT Fc=100kHz 400kHz 10dB (-6db)
7 43 VInput 400kHz-1400kHz Frequency / Hertz100k200k500k1M2M5M10 MdB-50-40-30-20-10010time/mSecs200 Fc=100kHz 44 time/uSecs10uSecs/div5060708090100nofilt er / V-40-2002040 15kHz 45ON MOSFET VDDVDDVDDVDD00 VDDVDDOFF ONOFF ON0046 Vin-pVin-mVout-pVout-mVin-pVin-mVout-pVo ut-m0000010110101100 Time/uSecs10uSecs/div708090100110120130E 1-P / V-40-30-20-1001020304047 VInputLSLSVDD-1 LSLS 48 Maxim D D D 50 VInput LevelShifterLevelShifterVDDL evelShifterLevelShifter 51E3-PE3-Ptime/mSecs500 / V-4-3-2-101234 2 PWM PWM time/mSecs20 / 52 Frequency / Hertz200k500k1M2M5M10 MdB-70-60-50-40-30-20-100 Frequency / Hertz200k500k1M2M5M10 MdB-70-60-50-40-30-20-100 PWM FFT PWM 400kHz 400kHz400kHz 800kHz PWM 800kHz 400kHz800kHz 53 BTL 130dB SNDR , Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(E4-P)
8 / dB-140-120-100-80-60-40-20020 Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(E4-P) / dB-140-120-100-80-60-40-20020 Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(E4-P) / dB-140-120-100-80-60-40-20020 Frequency/kHertz2kHertz/div0246810121416 182022 Spectrum(E4-P) / dB-140-120-100-80-60-40-20020 1kHz 5kHz 15kHz 20kHz 54 time/uSecs10uSecs/div60708090100110120E4 -P / V-4-3-2-101234 20kHz 4 55 1 Vin-pVin-mVout-pVout-mtime/uSecs10uSecs/ div01020304050nofilter / V-40-200204056 2 EMI Victor 57 SimetrixDEMO DEMO D PC
9 58 D / CQ 2003 8 CQ Class D Audio Amplifiers -Theory and Design, Sergio S nchezMoreno,Edited & Additional Text by Rod Elliott (ESP) IRF Class D Audio Amplifier Design
