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| PT12311 Stereo Audio Processor for Car Audio DESCRIPTION The PT12311 is an audio processor designed for versatile application, includes 3 stereo input selector with adjustable gain, master volume control with low frequency loudness compensation, individual output attenuator and tone control. It is a good solution for the car audio signal processing. Due to the high reliability requirement from the car audio business, the PT12311 improves both audio performances and input surge current capability, these causes the PT12311 is the best solution for the cost-effective car audio systems. FEATURES * 3 stereo inputs with gain selection, range from 0dB to +11.25dB in 3.75dB/step * Master volume from 0 dB to -78.75dB in 1.25dB/step * Speaker attenuator for balance and fader, range from 0dB to -38.75dB in 1.25dB/step * Each channel output can be muted individually. * Low frequency loudness compensation * Bass and Treble control, range from -14dB to +14dB in 2dB/step * Wide operation range (VDD = 5V to 10V) * Low harmonic distortion, low noise APPLICATIONS * Car Audio * Home Audio System * Powered Speaker System APPLICATION CIRCUIT 22uF PT12311 1 REF SCL 28 SDA 27 DGND 26 LFOUT 25 RFOUT 24 LROUT 23 RROUT 22 BOUT_R 21 BIN_R 20 BOUT_L 19 BIN_L 18 LOUT 17 LIN 16 LIN1 15 100n 5.6K 100n 100n 5.6K 100n 2.2uF Rear Right Rear Left 10uF 10uF 10uF 10uF Front Right Front Left VDD 2 VDD 3 AGND 2.7n 2.7n MCU 4 TREB_L 5 TREB_R 6 RIN 7 ROUT 8 LOUD_R 9 RIN3 10 RIN2 11 RIN1 12 LOUD_L Input Surge Protection L AUDIO 3 R L AUDIO 2 R L AUDIO 1 R 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K 2.2uF 2.2uF 100n 2.2uF 2.2uF 2.2uF 100n 2.2uF 2.2uF 13 LIN3 14 LIN2 Power Amplifier Tel: 886-66296288Fax: 886-29174598 http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT12311 BLOCK DIAGRAM Speaker Attenuator With Mute LROUT REF REF RROUT LFOUT REF REF RFOUT TREB_L BIN_L BOUT_L TREBLE TREBLE TREB_R BIN_R BOUT_R BASS REF Master Volume Loud SW REF BASS LOUD_L LIN LOUT LIN1 LIN2 LIN3 REF VDD LOUDNESS LOUDNESS LOUD_R RIN ROUT Input SW and GAIN Input SW and GAIN RIN1 RIN2 RIN3 REF SCL INT Ref REF REF BIAS I2C DECODER SDA DGND AGND V1.1 2 January 2010 1NIL 51 NIL 61 TUOL 71 L_NIB 81 L_TUOB 91 R_NIB 02 R_TUOB 12 TUORR 22 TUORL 32 TUOFR 42 TUOFL 52 DN D 62 G ADS 72 LCS 82 41 2NIL 31 3NIL 21 L_DUOL 11 1NIR 01 2NIR 9 3NIR 8 R_DUOL 7 TUOR 6 NIR 5 R_BERT 4 L_BERT 3 DN A G 2 DDV 1 FER V1.1 PIN CONFIGURATION ORDER INFORMATION Valid Part Number PT12311-S Package Type 28 Pins, SOP, 300mil PT12311 3 Top Code PT12311 January 2010 PT12311 PT12311 PIN DESCRIPTION Pin Name REF VDD AGND TREB_L TREB_R RIN ROUT LOUD_R RIN3 RIN2 RIN1 LOUD_L LIN3 LIN2 LIN1 LIN LOUT BIN_L BOUT_L BIN_R BOUT_R RROUT LROUT RFOUT LFOUT DGND SDA SCL I/O I I I O I I I I I I I I I O I O I O O O O O I I Description Analog reference voltage (1/2VDD) Supply input voltage Analog ground Left channel input for treble controller Right channel input for treble controller Right channel volume controller input Right channel Input selector output Right channel loudness input Right channel input 3 Right channel input 2 Right channel input 1 Left channel loudness input Left channel input 3 Left channel input 2 Left channel input 1 Left channel volume controller input Left channel Input selector output Left channel input for bass controller Left channel output for bass controller Right channel input for bass controller Right channel output for bass controller Right rear speaker output Left rear speaker output Right front speaker output Left front speaker output Digital ground 2 I C data input 2 I C clock input Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 V1.1 4 January 2010 PT12311 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.1 5 January 2010 |
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