PT2334 Stereo 2W Class-D Amplifier with Built-In Audio Processor DESCRIPTION FEATURES 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 2 Controlled by I C interface High Power CMOS processing Available in 48 Pins, LQFP 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 2 whole chip functions are controlled via I C bus. 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 RCH 2W OE SDA SCL Power Management RVDD CLASS-D RGND LCH 2W LGND ROP SPR RON Vref SD OE SDA SCL HPEN Vref CLASS-D L-VOL Control Interface LVDD LON LOP HPL L1 HPEN GNDA DACLO L1 L2 TREBLE LCH L4 SD VDDA L3 AGND Bypass 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, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan SPL PT2334 APPLICATION CIRCUIT R1 220 C19 2.2uF R3 8.2K P1 1u 1uF 68n C21 1uF C13 C20 C2 68n RINN AVDD OE SD SDA SCL ROUT RB1 RB2 NC 47 15 DACRO RON 46 16 SDI RGND 45 17 LRCI RVDD 44 L3 19 NC LOP 42 20 DACLO LVDD 41 FB C27 10uF 1uF L3 L4 C32 1nF U1 C33 1nF RSPK C34 1nF U2 C35 1nF LSPK FB FB 1uF L5 FB LINN LB1 LB2 LT 33 28 27 26 25 36 37 35 LINP RHPO L4 AGND 24 32 38 31 39 NC HGND LON L3 30 L2 23 LHPO 22 29 40 HPEN LGND LOUT L1 34 C12 1u L2 C24 21 HVDD BYPASS L4 1u P2 +5V C23 43 C11 L1 1 2 3 4 5 6 7 8 9 RT R1 ROP C10 1u CVBS 48 BCKI R4 GND C31 100uF FB RINP 18 1u C26 10uF L6 R3 C9 AUDIO 14 10 1u R2 C1 1u PC(VGA) AUDIO C8 L2 13 R4 R2 TV TUNER 1u 2n 11 R3 C7 C22 1uF FB 12 IC1 PT2334 LOUT 1u ROUT C16 C5 C6 LINE OUT HOST MCU R9 2K R7 1u C28 C14 C29 C25 1uF R4 8.2K R11 47K R12 47K 1K 220uF R5 100K R13 47K C30 220uF R2 R8 1 3 11 10 2 U3 Headphone 1K C18 2.2uF 220 V1.4 2.2uF 68n 68n 2n HDMI Audio C4 C3 C17 DSP or C15 1u 2 R6 R10 100K 2K September 2015 PT2334 ORDER INFORMATION Valid Part Number PT2334-LQ Package Type 48 Pins, LQFP Top Code PT2334-LQ PIN CONFIGURATION V1.4 3 September 2015 PT2334 PIN DESCRIPTION Pin Name RINN AVDD OE I/O I P I SD I SDA SCL ROUT RB1 RB2 RT R4 R3 R2 R1 DACRO SDI LRCI BCKI NC DACLO L1 L2 L3 L4 LT LB2 LB1 LOUT HPEN LHPO HGND BYPASS HVDD RHPO AGND LINN LINP NC LON LGND LVDD LOP ROP RVDD RGND RON NC RINP I I O I O I I I I I O I I I O I I I I I I O O I O P P P O P I I O P P O O P P O I V1.4 Description Pin No. Negative input of right channel Class-D amp 1 Power input for DAC and internal circuits 2 3 Output Enable setting, connect a 0.22F cap to GND. Shutdown Sets to low level will turn off whole chip and pull up to High level is back to normal 4 operation. 2 I C bus data input 5 2 I C bus clock input 6 Right channel line out 7 Capacitor 1 for right channel Bass controller 8 Capacitor 2 for right channel Bass controller 9 Capacitor for right channel Treble controller 10 Input 4 of right channel 11 Input 3 of right channel 12 Input 2 of right channel 13 Input 1 of right channel 14 Right channel DAC output 15 Serial data input of DAC 16 Channel clock input of DAC 17 Bit clock input of DAC 18 No connect 19 Left channel DAC output 20 Input 1 of left channel 21 Input 2 of left channel 22 Input 3 of left channel 23 Input 4 of left channel 24 Capacitor for left channel Treble controller 25 Capacitor 2 for left channel Bass controller 26 Capacitor 1 for left channel Bass controller 27 Left channel line out 28 Headphone sense input 29 Left channel headphone driver output. 30 Ground of headphone driver. 31 Bypass cap for Internal Voltage Reference, a 2.2µF cap is recommended. 32 Power input for headphone amplifier 33 Right channel headphone driver output 34 Ground for DAC and internal circuits 35 Negative input of left channel Class-D amp 36 Positive input of left channel Class-D amp 37 No connect 38 Negative output of left channel Class-D amp 39 Power ground of left channel Class-D amp 40 Power input of left channel Class-D amp 41 Positive output of left channel Class-D amp 42 Positive output of right channel Class-D amp 43 Power input of right channel Class-D amp 44 Power ground of right channel Class-D amp 45 Negative output of right channel Class-D amp 46 No connect 47 Positive input of right channel Class-D amp 48 4 September 2015 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 Dist, New Taipei City 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.4 17 September 2015