NJM2192A PRELI M I NARY SRS TruBass Bass Enhancement Processor ■GENERAL DESCRIPTION The NJM2192A is a Bass Enhancement Processor, based on SRS TruBass technology. The NJM2192A eliminates the need for large speakers to create low frequency fundamental tones, and it enhances and complements subwoofer performance. The NJM2192A is suitable for audio applications which are speaker system for mini components, CD radio cassette, multimedia speaker systems, TV and others. ■PACKAGE OUTLINE NJM2192AL NJM2192AM ■FEATURES ●Operating Voltage 4.7 to 13V ●Punch Control ●Internal Bass Gain Control Switch ●Bypass Function (Through) ●Internal Mode Switch ●External Adjustment for Speaker Size (Small, Medium, Large) ●Bipolar Technology ●Package Outline SDIP30, SDMP30 The TruBass technology right incorporated in the NJM2192A are owned by SRS Labs, a U.S. Corporation and licensed to New Japan Radio Co., Ltd. TruBass is protected under U.S. and foreign patents issued and/or pending. TruBass and the , are trademarks of SRS Labs, Inc. in the United States and selected foreign countries. Neither the purchase of the NJM2192A, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS technology. SRS Labs requires that all users of the NJM2192A must enter into a license agreement directly with SRS Labs if the royalty is not included in the purchase price. SRS Labs also requires any users to comply with all rules and regulations as outlined in the SRS Trademark Usage Manual. For further information, please contact: SRS Labs, Inc. 2909 Daimler Street. Santa Ana, CA 92705 USA Tel:949-442-1070 Fax:949-852-1099 http://www.srslabs.com - 1 –A NJM2192A ■PIN CONFIGURATION 1 30 2 29 3 28 4 27 5 26 6 25 7 24 8 23 9 22 10 21 11 20 12 19 13 18 14 17 15 16 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. FILOUT FIL1 FIL2 FIL3 FIL4 FIL5 FIL6 FIL7 PCOUT PCIN FIL8 FIL9 C1 C2 GND 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. V+ VREFOUT VREFIN GAINSW MODE2 MODE1 BASSOUT OUTR OUTL BASSINR INR BASSINL INL C3 C4 ■TruBass BLOCK DIAGRAM a b c INL 50K VREF GAIN SW BASSINL ( ) Filter ✼ VCA 50K VREF Punch VR VREF (✼) ■SPEAKER SIZE SETTING The standard setting of speaker size is as follows.(Reference) •Large Mode : fo ≤ 80Hz •Medium Mode : 80Hz < fo ≤ 150Hz •Small Mode : 150Hz < fo ≤ 250Hz Set the speaker size by TruBass effect of your application. -2- BYPASS BASS2 BASS1 BASSOUT BASSINR +6dB OUTR a b c 50K VREF +6dB OUTL a b c INR 50K VREF MODE SW Set the speaker size. NJM2192A ■ABSOLUTE MAXIMUM RATINGS (Ta=25°°C) PARAMETER SYMBOL Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range + V PD Topr Tstg RATING UNIT 15 700 -40 to +85 -40 to +125 V mW °C °C + ■ELECTRICAL CHARACTERISTICS (V =12V,Ta=25°C,VIN=-20dBV(100mVrms), Speaker Size : Medium) TEST CONDITION PARAMETER Operating Voltage Supply Current Reference Voltage Maximum Input Voltage IN SYMBOL OUT MODE PUNCH VR MIN. TYP. MAX. UNIT - - - - 4.7 12.0 13.0 V 0 0 - BYPASS - 6.6 11.6 16.6 0 0 - BASS1 MAX 6.6 11.6 16.6 0 0 - BASS2 MAX 6.6 11.6 16.6 V /2 0 0 - - - 5.8 6.0 6.2 f=1kHz THD=3% VIN - L BYPASS - 10.7 (3.1) 11.7 (3.8) - BASS1 MAX -6.3 (0.5) -4.3 (0.6) - BASS2 MAX -4.7 (0.6) -2.7 (0.7) - BYPASS - - -105 (5.6) -98 (12.6) Total Harmonic Distortion ICC VREF VIM No Signal + - VNO THD VIN R VIN VIN L VIN VIN R VIN VIN L VIN VIN Rg=0Ω A-Weighted 0 0 R L R Rg=0Ω A-Weighted Gain ”L” 0 f=1kHz VIN =-10dBV VIN - L - VIN R VIN VIN L VIN VIN R VIN VIN L VIN VIN R VIN - L - VIN R f=100Hz Gain “L” GVBYP - f=100Hz THD=3% Gain “L” f=100Hz Gain “L” BYPASS Gain R + V f=100Hz THD=3% Gain “L” Output Noise L f=1kHz L 0 BASS2 MAX - -94 (20.0) -88 (40.0) BYPASS - - 0.005 0.01 BASS1 MAX - 0.1 1.0 BASS2 MAX - 0.1 1.0 BYPASS - -1.0 0.0 1.0 R mA V dBV (Vrms) dBV (uVrms) % dB -3- NJM2192A + ■ELECTRICAL CHARACTERISTICS (V =12V,Ta=25°C,VIN=-20dBV(100mVrms), Speaker Size : Medium ) TEST CONDITION PARAMETER SYMBOL BASS Gain GVBASS IN f=100Hz Gain “L” f=100Hz Gain “L” f=100Hz Gain “H” f=100Hz Gain “L” f=100Hz Gain “H” Switch Control Voltage OUT VIN VIN L VIN VIN R VIN VIN L VIN VIN R VIN VIN L VIN VIN R VIN VIN L VIN VIN R VIN VIN L VIN VIN R VIH 19,20,21pin - - - VIL 19,20,21pin - - - MODE PUNCH VR MIN. TYP. MAX. BASS1 MAX 11.2 13.2 15.2 BASS1 MIN -18.4 -14.4 -10.4 BASS1 MAX 15.7 17.7 19.7 BASS2 MAX 12.8 14.8 16.8 BASS2 MAX 16.6 18.6 20.6 - - 2.0 - V 0.0 - 0.7 dB + V ■MODE SWITCH FUNCTION MODE1 MODE2 NOTES BYPASS (a) L - Input Through BASS1 (c) H L Low Frequency Content of TruBass BASS2 (b) H H TruBass Mode (1) (2) (1) BASS1:The output signal is low frequency content of TruBass derived from the stereo audio signal. (2) BASS2:TruBass Mode. ■BASS INPUT AMP GAIN SWITCH FUNCTION To Increase the TruBass effect with the GAIN Switch. -4- UNIT GAIN NOTES Gain Low L Normal Position Gain High H Gain +6dB NJM2192A ■INPUT TERMINAL OPERATING INSTRUCTION NJM2192As input equip 4 terminals INL(28pin), INR(26pin), BASSINL(27pin) and BASSINR(25pin). “Normal Setting” Short INL and BASSINL, INR and BASSINR at the normal TruBass mode. Lch input OUTL INL TruBass output signal OUT BASSINL Rin input NJM2192A INR BASSINR “Connect to the other surround ICs(TruSurround, SRS, etc.)” If NJM2192A is used with the other surround ICs, the low frequency signal is possible to be amplified by the other surround ICs. Then the audio stereo signal input into the BASSIN L/R, and the other surround signal input into INL/R. Lch input Rch input OUTL INL Passive Matrix TruSurround NJM2188 etc. OUT BASSINL NJM2192A INR BASSINR “Adjust TruBass effect” Insert an attenuator before the BASSIN L/R if necessary. Lch input INL RA RB VREF ( ) Input attenuator ✼ Rch input BASSINL 50kΩ OUTR 50kΩ NJM2192A INR 50kΩ RA RB OUTL BASSINR 50kΩ VREF (✼) Set the attenuator : (RA+RB)≥50kΩ -5- NJM2192A ■PIN DESCRIPTION NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ 10 PCIN PUNCH Control VR 29 C3 Filter Input VOLTAGE V+ V+/2 V+ 3 FIL2 30 C4 V+ Filter Input V+/2 V+ 1 FILOUT Filter Output 17 VREFOUT Vref Output 22 BASSOUT TruBass Output V+ V+ 50 V+/2 (Low Frequency Content) 50 23 OUTR Rch Audio Output 24 OUTL Lch Audio Output V+ V+ V+ 50 2 FIL1 Filter Input V+/2 50 Vref -6- NJM2192A NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ 4 FIL3 5 FIL4 7 FIL6 VOLTAGE V+ 50K Filter Input V+/2 50K 50K 11.6K V+ 6 FIL5 8 FIL7 11 FIL8 V+ 150 Filter Input V+/2 V+ 9 PCOUT PUNCH Control VR 12 FIL9 Filter Output V+ V+ 50 V+/2 50 V+ 13 C1 V+ V+ Filter Input 0V 10K -7- NJM2192A NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ VOLTAGE V+ 50 14 C2 Filter Input 0V 10K V+ V+ V+ 50K 18 VREFIN Vref Input V+ 19 GAINSW Gain SW 20 MODE2 MODE2 SW 21 MODE1 MODE1 SW V+ BASSINR 26 INR V+ 150 0V 150K V+ 25 V+ V+ 150 Audio Input 27 BASSINL 28 INL V+/2 50K Vref -8- V+/2 50K NJM2192A NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE 15 GND GND 0V 16 V+ V+ V+ -9- NJM2192A C3 INL BASS INL INR BASS INR OUTL OUTR BASS OUT MODE 1 MODE 2 GAIN SW VREF IN VREF OUT V+ 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 a b c +6dB +6dB C4 ■BLOCK DIAGRAM e d e d 50K a:BYPASS b:BASS2 c:BASS1 a b c 50K d:Nomal e:+6dB FILTER VREF FILTER GND 12 No. 1 2 3 4 5 6 SYMBOL FILOUT FIL1 FIL2 FIL3 FIL4 FIL5 FUNCTION Filter Output Filter Input Filter Input Filter Input Filter Input Filter Input No. 16 17 18 19 20 21 SYMBOL V+ VREFOUT VREFIN GAINSW MODE2 MODE1 7 FIL6 Filter Input 22 BASSOUT 8 9 10 11 12 13 14 15 FIL7 PCOUT PCIN FIL8 FIL9 C1 C2 GND Filter Input Punch Control VR Punch Control VR Filter Input Filter Output Filter Input Filter Input GND 23 24 25 26 27 28 29 30 OUTR OUTL BASSINR INR BASSINL INL C3 C4 (1) The BASSOUT is low frequency signal derived from the stereo audio signal. (2),(3) Refer to “■ ■INPUT TERMINAL OPERATING INSTRUCTION” - 10 - 13 14 15 GND 11 C2 10 C1 9 FIL9 8 FIL8 FIL3 7 PC IN FIL2 6 PC OUT FIL1 5 FIL7 4 FIL6 3 FIL5 2 VCA FIL4 1 FIL OUT FILTER MATRIX FUNCTION Supply Voltage + V /2 Output + V /2 Input Gain Switch MODE2 Switch MODE1 Switch TruBass Output (1) (Low Frequency Content) Rch Output Lch Output (2) TruBass Input Rch Input (3) TruBass Input Lch Input Filter Input Filter Input 45.3K R15 SW2 SW2 0.1uF 0.1uF C4 57.6K PCIN 3 4 5 6 7 8 9 10 0.01uF SW C1 C2 GND 11 12 C22 MODE1 BASSOUT Rch OUT Lch OUT GND V+ VREFOUT VREFIN 18 10uF PCOUT 2 19 1uF/ C8 FIL7 1 20 C7 FIL6 BASSINR INR 21 NJM2192A GAINSW FIL5 BASSINL 22 FIL9 FIL4 INL 23 MODE2 FIL3 C3 24 FIL8 FIL2 C4 25 PUNCH VR Max 0.1uF 0.1uF C2 C1 26 10KB Min SW1 SW1 FIL1 27 H L 158K R13 H L R12 13K R1 C3 56.2K R2 FILOUT 28 H L 107K R14 H 3.09K R3 29 0.1uF 0.1uF 8.87K R5 L 21K R4 30 C6 C5 37.4K R6 2.32K R10 VREF 22.1K VREF R11 17 GND LARGE 13 14 15 MODE2 100uF C9 V+ 12V 10uF C10 C11 10uF 10uF C12 10uF C13 10uF C14 10uF C15 C16 10uF 10uF C17 10uF C18 10uF C19 0.1uF C20 C21 0.01uF VREF 10K R7 10K 10K R8 R9 BASS OUT Rch OUT Lch OUT Rch IN Lch IN GND GND GAIN H L H L MODE2 H L MODE1 NJM2192A ■APPLICATION CIRCUIT(1) 16 GND VREF SPEAKER SIZE MEDIUM SMALL SW1 H L L SW2 H H L 3 MODE SPEAKER SIZE MODE1 Bypass - L BASS1 L H BASS2 H H FUNCTION SETTING - 11 - - 12 VREF VREF VREF 3 4 5 6 7 8 9 10 11 R GND 2 C2 1 BASSINR OUTL GND 18 V+ VREFOUT VREFIN GAINSW MODE2 MODE1 BASSOUT 19 C8 INR 20 10uF FIL8 BASSINL 21 C1 PCIN INL 22 1uF C7 PCOUT C3 OUTR C4 23 FIL9 FIL7 24 PUNCH VR FIL6 25 Max FIL5 26 Min R6 FIL4 27 0.1uF FIL3 28 0.1uF C6 0.1uF C5 R3 FIL2 29 10KB C3 0.1uF C4 FIL1 30 R5 R4 R2 R1 0.1uF 0.1uF C2 C1 FILOUT 17 GND 12 13 14 15 100uF C9 V+ 12V 10uF C10 C11 10uF 10uF C12 10uF C13 10uF C14 10uF C15 C16 10uF 10uF C17 10uF C18 10uF C19 0.1uF C20 C21 0.01uF VREF 10K R7 10K 10K R8 R9 BASS OUT Rch OUTPUT Lch OUTPUT Rch INPUT Lch INPUT GND GND GAIN H L H L MODE2 H L MODE1 NJM2192A ■APPLICATION CIRCUIT(2) 16 NJM2192A C22 0.01uF GND SPEAKER SIZE LARGE MEDIUM R1 56.2K 21K 21K R2 13K 3.09K 3.09K SMALL R3 158K 42K 42K R4 37.4K 37.4K 22.1K R5 8.87K 8.87K 2.32K R6 107K 107K 32K NJM2192A ■BASS1 MODE TYPICAL CHRACTERISITCS NJM2192(TruBass) GAIN STRUCTURE “Speaker Size : Small” +16 +14 +12 +10 +8 +6 +4 dB +2 +0 -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k 5k 10k 20k 10k 20k Hz Vin=-12.2dBV(245mVrms), Lch In → Lch Out, Punch VR : MAX V+ = 12V NJM2192(TruBass) GAIN STRUCTURE “Speaker Size : Medium” +16 +14 +12 +10 +8 +6 dB +4 +2 +0 -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k 5k Hz Vin=-12.2dBV(245mVrms), Lch In → Lch Out, Punch VR : MAX V+ = 12V - 13 - NJM2192A NJM2192(TruBass) GAIN STRUCTURE “Speaker Size : Large” +16 +14 +12 +10 +8 +6 dB +4 +2 +0 -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k 5k Hz Vin=-12.2dBV(245mVrms), Lch In → Lch Out, Punch VR : MAX V+ = 12V - 14 - 10k 20k NJM2192A ■BASS2 MODE TYPICAL CHRACTERISITCS NJM2192(TruBass) GAIN STRUCTURE “Speaker Size : Small” +16 +14 +12 a:MAX +10 +8 +6 +4 dB b:MIN +2 +0 -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k 5k 10k 20k Hz Vin=-12.2dBV(245mVrms), Lch In → Lch Out, Punch VR a:MAX, b:MIN V+ = 12V NJM2192(TruBass) GAIN STRUCTURE “Speaker Size : Medium” +16 +14 +12 a:MAX +10 +8 +6 +4 dB b:MIN +2 +0 -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k 5k 10k 20k Hz Vin=-12.2dBV(245mVrms), Lch In → Lch Out, Punch VR a:MAX, b:MIN V+ = 12V - 15 - NJM2192A NJM2192(TruBass) GAIN STRUCTURE “Speaker Size : Large” +16 +14 +12 a:MAX +10 +8 +6 +4 dB +2 b:MIN +0 -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k 5k 10k 20k Hz Vin=-12.2dBV(245mVrms) V+ = 12V Lch In → Lch Out, Punch VR a:MAX, b:MIN [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. - 16 -