PT2334 Stereo 2W Class-D Amplifier with Built-In Audio Processor DESCRIPTION FEATURES 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. • Supply Voltage: 3.7~6V • Differential input power amplifier for improved CMRR. • 2W X 2 Class-D power amplifier (VDD=5V, RL=4Ω) • 70mW X 2 Class-AB headphone driver (RL=32Ω) • 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 SDI LRCI BCKI R4 SDI LRCI BCKI RT TREBLE RCH R4 R3 R3 R2 R2 R1 R1 DACRO RB2 RB1 ROUT HVDD RHPO HPR 16-Bit DAC R-VOL OE SDA SCL GNDA Pow er Management ROP CLASS-D RGND RON LCH 2W LGND LON LVDD LOP SPR Vref SD OE SDA SCL HPEN Vref CLASS-D L-VOL Control Interface HPL L1 HPEN VDDA DACLO L1 L2 TREBLE LCH L4 SD Bypass L3 AGND RVDD RCH 2W L2 AVDD RINN BASS RCH Vref BYPASS RINP L3 L4 LT BASS LCH LB2 LB1 LOUT HGND LHPO LINP LINN Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan SPL PT2334 APPLICATION CIRCUIT R1 220 C19 2.2uF R3 8.2K P1 1u C21 1uF C13 1uF 68n RINN AVDD OE SD SDA SCL ROUT RB1 47 15 DA C RO RO N 46 16 SDI RGND 45 17 LRC I RVDD 44 BCKI RO P 43 NC LOP 42 C11 1u L4 C12 1u LVDD DA C LO LGND 40 22 L2 LON FB C27 10uF C23 1uF L3 L4 34 35 C15 1u L5 2 C34 1nF U2 C35 1nF LSPK 2K R7 C29 C25 1uF 1K 220uF C30 220uF 220 RSPK FB R5 100K C18 2.2uF C33 1nF R9 R13 47K R2 U1 1uF LINN 36 RHPO AGND C28 68n 68n C14 1u C4 33 C3 2n 2.2uF LB1 27 C17 30 LB2 26 28 LT 25 HVDD 37 HGND 31 38 LINP LHPO NC L4 HPEN 29 L3 24 LOUT 23 C32 1nF FB FB 39 R4 8.2K R12 47K +5V 41 L1 HDMI A udio R11 47K P2 L2 C24 21 BYPASS 32 R4 L1 1 2 3 4 5 6 7 8 NC 19 DSP or V1.3 C20 C2 R1 18 C10 1u C VBS RB2 48 20 GND C31 100uF FB RINP L3 1u C26 10uF L6 R3 C9 AUDIO 9 14 68n R2 C1 L2 13 RT AUDIO C8 1u R4 PC (VGA) 1u 10 11 R3 TV TUNER C7 C22 1uF FB 12 R2 1u IC1 PT2334 LOUT 1u OUT ROUT C16 2n C5 C6 LINE HO ST MC U R8 R6 1K R10 100K 2K 1 3 11 10 2 U3 Headphone 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 V1.3 Bottom Layer of Evaluation Board 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