LM4766 Overture Audio Pwr Amp Series Dual 40W Audio Pwr ...
Transcript of LM4766 Overture Audio Pwr Amp Series Dual 40W Audio Pwr ...
LM4766
LM4766 Overture Audio Power Amplifier Series Dual 40W Audio Power
Amplifier with Mute
Literature Number: JAJS634
2006幎 3æ
1© National Semiconductor Corporation DS100928-08-JP
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fixed overturecom
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ation and recomposed.
SGM
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1.doc Fixed (Kat)
SGM
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4.doc Fixed (Kat)
SGM
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8.doc Fixed (Kat)
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DS100928
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33020
19980623
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ual 40-Watt A
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ith Mute
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Top ViewNon-Isolated TO-220 Package
Order Number LM4766TSee NS Package Number TA15A
Isolated TO-220 PackageOrder Number LM4766TF
See NS Package Number TF15B
Plastic Package
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FIGURE 1. Typical Audio Amplifier Application Circuit
NoteïŒæ¬åŒ§å ã®æ°åã¯ã¢ã³ã Bã®ãã³ã¢ãŠãã§ããããã*ãªãã·ã§ã³éšåã¯å®éã®èšèšèŠä»¶ã«ãã£ãŠå€ãããŸãã
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絶察æ倧å®æ Œ (Note 4ã5)
æ¬ããŒã¿ã·ãŒãã«ã¯è»çšã»èªç©ºå®å®çšã®èŠæ Œã¯èšèŒãããŠããŸãããé¢é£ããé»æ°çä¿¡é Œæ§è©Šéšæ¹æ³ã®èŠæ Œãåç §ãã ããã
åäœå®æ Œ (Note 4ã5)
é»æ°çç¹æ§ (Note 4ã5)
ç¹èšã®ãªãéãã以äžã®ä»æ§ã¯ãVCCïŒïŒ 30VãVEEïŒïŒ 30VãIMUTEïŒïŒ 0.5mAãRLïŒ 8Ωã«å¯ŸããŠé©çšãããŸãããªãããå€ã¯ãTAïŒ 25°Cã«å¯ŸããŠé©çšãããŸãã
é»æºé»å§ |VCC|ïŒ |VEE|(å ¥åãªã ) 78Vé»æºé»å§ |VCC|ïŒ |VEE|
(å ¥åãã) 74Våçžå ¥åé»å§ (VCCãŸãã¯VEE)ããã³
|VCC|ïŒ |VEE|⊠60Vå·®åå ¥åé»å§ 60Våºåé»æµ å éšå¶éæ¶è²»é»å (Note 6) 62.5WESDèå§ (Note 7) 3000Væ¥åéšæž©åºŠ (Note 8) 150â
ç±æµæéçµ¶çž Tããã±ãŒãžÎžJC 1â /Wçµ¶çž TFããã±ãŒãžÎžJC 2â /Wãã³ãä»ãæ å ±
TãTFããã±ãŒãž 260âä¿å枩床 ïŒ 40âïœïŒ 150â
枩床ç¯å²TMIN⊠TA⊠TMAX ïŒ 20â⊠TAâŠïŒ 85â
é»æºé»å§ |VCC|ïŒ |VEE| (Note 1) 20Vïœ 60V
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ç¹èšã®ãªãéãã以äžã®ä»æ§ã¯ãVCCïŒïŒ 30VãVEEïŒïŒ 30VãIMUTEïŒïŒ 0.5mAãRLïŒ 8Ωã«å¯ŸããŠé©çšãããŸãããªãããå€ã¯ãTAïŒ 25°Cã«å¯ŸããŠé©çšãããŸãã
Note 1: åäœã¯ 60VãŸã§ä¿èšŒãããŠããŸãããé©åãªç±å¯Ÿå¿åŠçœ®ãè¬ããªããšãSPiKeãããã¯ã·ã§ã³åè·¯ã«ãã£ãŠæªã¿ãçºçããããšããããŸãã 詳现ã¯ãã¢ããªã±ãŒã·ã§ã³æ å ±ããåç §ããŠãã ããã
Note 2: DCé»æ°ãã¹ãã ãã¹ãåè·¯ #1ãåç §ã
Note 3: ACé»æ°ãã¹ãã ãã¹ãåè·¯ #2ãåç §ã
Note 4: ç¹èšã®ãªãéããé»å§ã¯ãã¹ãŠGND端å (5ã10)ãåºæºãšããŠæž¬å®ããŸãã
Note 5: ã絶察æ倧å®æ Œãã¯ããããè¶ ããå Žåã«ããã€ã¹ã«ç Žå£ãçããå¯èœæ§ããããªãããå€ã瀺ããŸãã ãåäœå®æ Œãã¯ãããã€ã¹ãåäœå¯èœã§ããæ¡ä»¶ã瀺ããŠãããã®ã§ãç¹å®ã®æ§èœãªãããå€ãä¿èšŒãããã®ã§ã¯ãããŸããããé»æ°çç¹æ§ãã¯ãç¹å®ã®æ§èœç¯å²ãä¿èšŒããç¹å®ã®è©Šéšæ¡ä»¶ã®ããšã«ããã DC ããã³ AC ã®é»æ°çä»æ§ã瀺ããŸãã ããã¯ãããã€ã¹ãåäœå®æ Œå ã«ããããšãåæãšããŠããŸãã ãªãããã®å®ãã®ãªããã©ã¡ãŒã¿ã«å¯ŸããŠã¯ãä»æ§ã¯ä¿èšŒãããŸããããTypå€ãããã€ã¹æ§èœã®åªããææšã«ãªããŸãã
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Note 7: 1.5kΩã®æµæãéã㊠100pFãæŸé»ããã人äœã¢ãã«ã
Note 8: åäœæ¥åéšæž©åºŠã®æé«å€ã¯ 150°Cã§ãããç¬éçå®å šåäœé å㯠250°Cã§ãã
Note 9: Typå€ã¯ 25°Cã«ããã枬å®å€ã§ããããã©ã¡ããªãã¯åºæºãè¡šããŸãã
Note 10: ãªãããå€ã¯ãå šéšå補é æ€æ»ã«ããèŠå®å€ãæºãããŠããããšãä¿èšŒããŠããŸãã
Note 11: äžè¶³é»å§ä¿è·åè·¯ãç¡å¹ã«ãããããã«ã¯ãVEEã¯ãã®ç«¯åã§ã°ã©ãŠã³ãããæäœïŒ 9Vã§ãªããã°ãªããŸããã ããã«ãVCCãšVEEãšã®é»å§å·®ã¯ 14Vããé«ããªããã°ãªããŸããã
Note 12: åºåããããã¢ãŠãé»å§ VODã¯ãé»æºé»å§ãšã¯ãªããã³ã°é»å§ãšã®å·®ã§ããã代衚çãªæ§èœç¹æ§ãã®âClipping Voltage vs. Supply Voltageâã®ã°ã©ããåç §ããŠãã ããã
Note 13: é絶çžåããã±ãŒãž (T)ã®ç±æµæΞJC㯠1â /Wã§ãããããã«å¯ŸããŠçµ¶çžåããã±ãŒãž (TF)ã®ÎžJC㯠2â /Wãšãªã£ãŠããŸãã絶çžåããã±ãŒãžã¯ããã®ããã«æ¥åéšããã±ãŒã¹ãžã®ç±æµæã倧ãããããé»æºé»å§ãäœãããŠããã±ãŒãžã®æ¶è²»é»åãæããå¿ èŠããããŸãã± 26V以äžã®é»æºãçšããå Žåã¯ãéåžžåäœæã«ãµãŒãã«ã»ã·ã£ããããŠã³ãèµ·ãããªããããç±æµæã 1â /W以äžã®ããŒãã·ã³ã¯ã䜵çšããŠãã ããã
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ãã¹ãåè·¯ #1 (Note 2) (DCé»æ°ãã¹ãåè·¯ )
ãã¹ãåè·¯ #2 (Note 3) (ACé»æ°ãã¹ãåè·¯ )
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FIGURE 2. Bridged Amplifier Application Circuit
7 www.national.com/jpn/
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FIGURE 3. Single Supply Amplifier Application Circuit
Note: *ãªãã·ã§ã³éšåã¯å®éã®èšèšèŠä»¶ã«ãã£ãŠå€ãããŸãã
å¿çšåè·¯äŸ
FIGURE 4. Special Audio Amplifier Application Circuit
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2 Ri Rfãšé£æºããŠACã²ã€ã³ãçããããã®åè»¢å ¥åæµæã
3 Rf Riãšé£æºããŠACã²ã€ã³ãçããããã®åž°éæµæã
4 Ci(Note 14)
DCã§ãŠããã£ã»ã²ã€ã³ãä¿èšŒããåž°éã³ã³ãã³ãµã ããã«ãRiãšé£æºããŠãfCïŒ 1/(2ÏRiCi)ã®ãã€ãã¹ã»ãã£ã«ã¿ãæ§æããŸãã
5 CS é»æºã®ãã£ã«ã¿ããã³ãã€ãã¹æ©èœãæãããŸãã ãã€ãã¹ã»ã³ã³ãã³ãµã®é©åãªé 眮ãšéžæã¯ããã¢ããªã±ãŒã·ã§ã³æ å ±ãã®ãé»æºãã€ãã¹åŠçœ®ããåç §ããŠãã ããã
6 RV(Note 14)
å ¥åé»å§ã¬ãã«ãèšå®ããããšã«ãããããªã¥ãŒã ã»ã³ã³ãããŒã«ã®åœ¹å²ãæãããŸãã
7 RIN(Note 14)
å路㫠CINãååšãããšãã«ãã¢ã³ãã®å ¥å端åã® DCãã€ã¢ã¹ç¹ãèšå®ããŸãã ããã«ãCINãšé£æºããŠãfCïŒ 1/(2ÏRINCIN)ã®ãã€ãã¹ã»ãã£ã«ã¿ãæ§æããŸããFigure 4ãåç §ã
8 CIN(Note 14)
å ¥åä¿¡å·ã® DCãªãã»ããããã®ãŸãŸã¢ã³ãã®å ¥åã«æµå ¥ããªãããé»æ¢ããå ¥åã³ã³ãã³ãµã
9 RSN(Note 14)
CSNãšé£æºããŠé«åšæ³¢ã®äžå®å®æ§ãäœæžãããããŒã«ã圢æããããšã«ãããåºå段ãå®å®ãããŸãã
10 CSN(Note 14)
RSNãšé£æºããŠé«åšæ³¢ã®äžå®å®æ§ãäœæžãããããŒã«ã圢æããããšã«ãããåºå段ãå®å®ãããŸãã ããŒã«ã¯ fCïŒ 1/(2ÏRSNCSN)ã«èšå®ãããŸããFigure 4ãåç §ã
11 L (Note 14) é«åšæ³¢ã§ã¯ãRãé«å®¹éæ§è² è·ãæžçµåããçŽåå ±æ¯å路㮠Qãäœäžãããããããã«é«ã€ã³ããŒãã³ã¹ã«ããŸãã ããã«ãäœåšæ³¢ã§ã¯ãRãç絡ããŠãªãŒãã£ãªä¿¡å·ããã®ãŸãŸè² è·ã«äŒããããã«äœã€ã³ããŒãã³ã¹ã«ããŸããFigure 4ãåç §ã
12 R (Note 14)
13 RA åäžé»æºåäœã§ããã©ã³ãžã¹ã¿Q1ã«DCé»å§ãã€ã¢ã¹ãäŸçµŠããŸãã
14 CA åäžé»æºåäœåãã«ããã€ã¢ã¹ã»ãã£ã«ã¿æ©èœãæãããŸãã
15 RINP(Note 14)
åäžé»æºåäœåãã«ãã¢ã³ãã®äž¡å ¥åéã®é»å§å·®ãå¶éããŸãã RINPæ©èœã®è©³çŽ°ã¯ããã¢ããªã±ãŒã·ã§ã³æ å ±ãã®ãã¯ãªã㯠/ãããããåç §ããŠãã ããã
16 RBI åäžé»æºåäœåãã«ãå ¥åãã€ã¢ã¹é»æµãäŸçµŠããŸããRBIã®æ©èœã®è©³çŽ°ã¯ããã¢ããªã±ãŒã·ã§ã³æ å ±ãã®ãã¯ãªã㯠/ãããããåç §ããŠãã ããã
17 RE åäžé»æºåäœã§ããã©ã³ãžã¹ã¿Q1ãžã®åºå® DCé»æµãèšå®ããŸãã ãã®æµæã¯ãCAãšé£æºã㊠1/2é»æºé»å§ç¹ãå®å®ãããŸãã
18 RM ãã¥ãŒãã£ã³ã°ããªãã«ããããã«ã端å 6ãŸã㯠11ãã0.5mAãæµåºã§ããããã«èšå®ããããã¥ãŒãæµæã â RMã¯ãåŒ RM⊠(|VEE|ïŒ 2.6V)/l ã§èšç®ããŸãã I⧠0.5mAã§ãã ã代衚çãªæ§èœç¹æ§ãã®æ²ç·âMute Attenuation vs Mute Current (per Amplifier)âãåç §ããŠãã ããã
19 CM ãã¥ãŒãã£ã³ã°ããªã³ããã³ãªãã«ããããã®å€§ããªæå®æ°ã圢æããããã«èšå®ããããã¥ãŒãã»ã³ã³ãã³ãµã
20 S1 ãªãŒãã³æã«ã¢ã³ããžã®å ¥åé³æ¥œä¿¡å·ããã¥ãŒãããããã¥ãŒãã»ã¹ã€ããã
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THDïŒ N vs Frequency THDïŒ N vs Frequency
THDïŒ N vs Output Power THDïŒ N vs Output Power
THDïŒ N vs Distribution THDïŒ N vs Distribution
11 www.national.com/jpn/
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Channel Separation vsFrequency
Clipping Voltage vsSupply Voltage
Output Power vsLoad Resustance
Output Power vsSupply Voltage
Power Dissipation vsOutput Power
Power Dissipation vsOutput Power
12www.national.com/jpn/
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Max Heatsink Thermal Resistance (â /W)at the Specified Ambient Temperature (â )
Note: äžã®è¡šã«ãããããŒãã·ã³ã¯ã®æ倧ç±æµæå€ÎžSAã¯ããµãŒãã«ã»ã³ã³ããŠã³ãã䜿çšããŠåŸãããΞCS = 0.2â /W ã§èšç®ãããã®ã§ãã
Safe Area SPiKe Protection
Response
Pulse Power Limit Pulse Power Limit
13 www.national.com/jpn/
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Pulse Response Large Signal Response
Power SupplyRejection Ratio
Common-ModeRejection Ratio
Open LoopFrequency Response
Supply Current vsCase Temperature
14www.national.com/jpn/
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Input Bias Current vsCase Temperature
Mute Attenuation vsMute Current (per Amplifier)
Mute Attenuation vsMute Current (per Amplifier)
Output Power/Channelvs Supply Voltage
fïŒ 1kHz, RLïŒ 4Ω, 80kHz BW
Output Power/Channelvs Supply Voltage
fïŒ 1kHz, RLïŒ 6Ω, 80kHz BW
Output Power/Channelvs Supply Voltage
fïŒ 1kHz, RLïŒ 8Ω, 80kHz BW
15 www.national.com/jpn/
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