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| PT2334 Stereo 2W Class-D Amplifier with Built-In Audio Processor DESCRIPTION The PT2334 is an integrated stereo 2W Class-D amplifier accompany with a Class-AB headphone driver. The input interface accepts both analog and digital audio sources; the chip included a 16-bit DAC to convert digital audio source to analog signal. The signal process is basically in analog domain to maintain the high performances and low power consumption. The PT2334 also provide very useful multi-sources selection (Up to 4 sources) and tone control functions, thanks for the advanced CMOS technology now we could combine both audio processing and amplification into a single chip. The whole chip functions are controlled via I2C bus. FEATURES * Supply Voltage: 3.7~6V * Differential input power amplifier for improved CMRR. * 2W X 2 Class-D power amplifier (VDD=5V, RL=4) * 70mW X 2 Class-AB headphone driver (RL=32) * BASS and TREBLE control * 32 steps volume controller * 4 Inputs selection * Audio line out (same level with volume and tone) * Built-In 16 bits DAC for digital audio sources * Pop-Free circuitry eliminates unpleasant noises during power ON/OFF. * Low power shutdown * Over Heat/Over current protection circuitry * Controlled by I2C interface * High Power CMOS processing * Available in 48 Pins, LQFP APPLICATIONS * * * * * Flat panel display and TV Portable media player Portable player ducking system Digital photo frame Other audio applications BLOCK DIAGRAM DACRO R1 R2 R3 R4 RT RB2 RB1 ROUT HVDD RHPO RINP RINN SDI LRCI BCKI SDI LRCI BCKI TREBLE RCH BASS RCH HPR R1 R2 R3 16-Bit DAC Vref R-VOL R4 RCH 2W Bypass VDDA GNDA SD OE SDA SCL RVDD RGND ROP RON SPR CLASS-D BYPASS AVDD AGND SD OE SDA SCL HPEN Pow er Management Vref LCH 2W Vref LGND LVDD LON LOP SPL CLASS-D L-VOL HPL Control Interface L1 L2 HPEN L3 DACLO L1 L2 L3 L4 TREBLE LCH BASS LCH L4 LT LB2 LB1 LOUT HGND LHPO LINP LINN Tel: 886-66296288Fax: 886-29174598 http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2334 APPLICATION CIRCUIT R1 220 C19 2.2uF R3 8.2K P1 HO ST MC U C1 C5 C16 2n C2 C20 C13 C21 1uF LINE OUT ROUT LOUT C7 IC1 PT2334 C22 1uF C26 10uF L1 FB C31 100uF GND P2 +5V C6 1u 12 11 68n 68n 1u 1uF 1u 10 9 8 7 6 5 4 3 2 1 L6 FB 48 47 46 RINN R3 R4 RT RB2 RB1 ROUT SCL SDA SD OE AVDD 1u 1u R2 TV TUNER 13 14 15 16 17 R2 R1 DA C RO SDI LRC I BCKI NC DA C LO L1 L2 L3 L4 LOUT HPEN 29 RINP NC RO N C8 L2 FB C27 10uF C23 1uF L3 L4 C24 FB C34 1nF C32 1nF C33 1nF U1 L2 RGND 45 RVDD 44 RO P LOP LVDD 43 42 41 RSPK PC (VGA) AUDIO R3 L3 C9 1u 18 19 20 21 22 23 24 FB U2 LGND 40 LON NC LINP LINN 36 BYPASS 32 HVDD AGND HGND 31 RHPO LHPO 39 38 37 1uF C35 1nF LSPK C10 1u C VBS AUDIO R4 L4 C11 1u C12 1u L5 FB LB2 26 C3 68n LB1 27 LT 25 C17 R9 2K R7 C29 C25 1uF R5 100K 220uF C30 220uF R8 1K R10 2K 1K 1 3 11 10 2 U3 28 30 33 34 35 C4 68n C14 1u DSP or HDMI A udio R11 47K R12 47K R13 47K C15 1u 2.2uF C28 2n R2 220 R4 8.2K Headphone C18 2.2uF R6 100K V1.3 2 December, 2009 PT2334 ORDER INFORMATION Valid Part Number PT2334-LQ Package Type 48 Pins, LQFP Top Code PT2334-LQ PIN CONFIGURATION Top Layer of Evaluation Board Bottom Layer of Evaluation Board V1.3 3 December, 2009 PT2334 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 V1.3 4 December, 2009 |
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