PT2347 PTC | Alldatasheet
Document overview
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Technical content
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
DESCRIPTION
The PT2347 is an audio processor designed for versatile application, it adopts all of functions from successful predecessor- the PT2313L, and it includes 3 stereo input selector with adjustable gain, master volume control with low frequency loudness compensation, individual output attenuator and tone control. In car audio applications, maximum power output of the audio set is measurement on saturated condition, it may not achieve the goal if power amplifier does not have enough gain, therefore, the PT2347 provides extra +10dB voltage gain in final output stage, it is easy to drive the power amplifier into saturated power and eliminates external gain OPAMP.
APPLICATIONS
- Car audio
- Home audio system
- Powered speaker system
FEATURES
- Controlled by I²C interface
- Direct replace the PT2313L with +10dB output gain
- 3 stereo inputs with gain selection, range from 0dB to +11.25dB in 3.75dB/step
- Master volume from 0dB to -78.75dB in 1.25dB/step
- Speaker attenuator for balance and fader, range from 0dB to -38.75dB in 1.25dB/step
- Each 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 = 4V to 10V)
- Low harmonic distortion Low noise BLOCK DIAGRAM LOUT LIN1 LIN2 LIN3 REF LOUDNESS LIN LOUD_L REF BOUT_L BIN_L TREB_L TREBLE BASS LFOUT LROUT REF REF REF REF LOUDNESS REF TREBLE BASS RROUT RFOUT TREB_R BOUT_R LOUD_R RIN RIN3 RIN2 RIN1 ROUT REF VDD REF AGND REF SCL SDA DGND I2C DECODERBIAS BIN_R Speaker Attenuator With Mute Master Volume Loud SW +10dB GAIN +10dB GAIN Input SW and GAIN Input SW and GAIN
PRE1.0 2 APPLICATION CIRCUIT DIAGRAM 14 15 28REF VDD AGND TREB_L TREB_R RIN ROUT LOUD_R RIN3 RIN2 RIN1 LOUD_L LIN3 LIN2 LIN1 LIN LOUT BOUT_L BIN_L BIN_R BOUT_R RROUT LROUT RFOUT LFOUT DGND SDA SCL 2.2uF 2.2uF 22uF VDD 27n 27n 100n 100n 100n 100n 100n 100n 5.6K 5.6K Front Left Front Right Rear Left Rear Right 10uF 10uF 10uF 10uF Pow er Amplifier 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF AUDIO 1 AUDIO 2 AUDIO 3 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K L L L R R R Input Surge Protection PT2347
PRE1.0 3 ORDER INFORMATION Valid Part Number Package Type Top Code PT2347-S 28 Pins, SOP, 300mil PT2347-S PIN CONFIGURATION PIN DESCRIPTION Pin Name I/O Description Pin No. REF - Analog reference voltage (1/2VDD) 1 VDD - Supply input voltage 2 AGND - Analog ground 3 TREB_L I Left channel input for treble controller 4 TREB_R I Right channel input for treble controller 5 RIN I Right channel volume controller input 6 ROUT O Right channel Input selector output 7 LOUD_R I Right channel loudness input 8 RIN3 I Right channel input 3 9 RIN2 I Right channel input 2 10 RIN1 I Right channel input 1 11 LOUD_L I Left channel loudness input 12 LIN3 I Left channel input 3 13 LIN2 I Left channel input 2 14 LIN1 I Left channel input 1 15 LIN I Left channel volume controller input 16 LOUT O Left channel Input selector output 17 BIN_L I Left channel input for bass controller 18 BOUT_L O Left channel output for bass controller 19 BIN_R I Right channel input for bass controller 20 BOUT_R O Right channel output for bass controller 21 RROUT O Right rear speaker output 22 LROUT O Left rear speaker output 23 RFOUT O Right front speaker output 24 LFOUT O Left front speaker output 25 DGND - Digital ground 26 SDA I I 2C data input 27 SCL I I 2C clock input 28