Preliminary PT2335 2W X 2 Stereo Integrated Audio Amplifier DESCRIPTION FEATURES The PT2335 is an integrated audio amplifier design for the low voltage (5V) application purpose, built-in stereo 2W Class-D power amplifier with audio processor, it provides 4 stereo sources selector, and all signal process is based on pure analog processing to maintain high performances and low power consumption. The audio processor includes all the advanced control functions such like digital controlled volume, adaptive loudness, treble and bass control. It also provides line output for versatile application. The whole chip functions are controlled via I2C bus. • Supply voltage: 3 ~ 6V • 4 Stereo inputs • Input gain selectable (0dB, 3.75dB, 7.5dB, 11.25dB) • Independent channel volume controller • Loudness function • Bass and treble control. • 2W X 2 Class-D power amplifier (VDD=5V, RL=4Ω) • 2 voltage gain setting for power amp (20dB, 26dB) • Internal and external oscillator selectable • Dual switching frequency for avoid AM radio interference • Pop-Free circuitry eliminates unpleasant noises during power ON/OFF. • Low power shutdown • High PSRR • Over heat/over current protection circuitry • Controlled by I2C interface • High power CMOS processing • LQFP 48 pins package APPLICATIONS • • • • • Portable player duck speaker system Portable media player Digital photo frame Flat panel display and TV Other audio applications BLOCK DIAGRAM RGOUT RIN LOUDR RT RB2 RB1 R1 INP UT GA IN R2 V O LUME TREBLE BA SS ROUT R3 R4 RINP VDD AVDD AGND INT O SC RINN C LA SS-D RVDD CLOCK SEL OSC3 EXT O SC SD SCL OSC2 OSC1 OE SDA RO P RGND RO N Power GND Management BYPASS RC H 2W LGND C ontrol Interface LC H 2W C LA SS-D L4 LO N LVDD LO P LINN LINP L3 L2 INP UT GA IN V O LUME TREBLE BA SS LOUT L1 LGOUT LIN LOUDL LT LB2 LB1 Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2335 APPLICATION CIRCUIT HOST MCU 68n 8.2K 0.47uF 2.2uF 0.47uF 820p 0.1u 0.47uF 0.22uF 68n VDD 0.47uF AVDD RINN OE 1 3 SD 2 4 RINP 48 R1 NC 47 15 RGOUT RON 46 16 RIN RGND 45 17 LOUDR RVDD 44 PT2335 LB1 27 LB2 26 LT 25 0.1uF RSPK 1uF 10uF LSPK 0.47uF 0.47uF 0.1uF 68n 2.2uF 4.7K 4.7K 820p 36 37 35 38 LINP LINN NC L4 AGND L3 24 34 23 NC 39 33 LON VDD L2 32 22 31 40 OSC3 LGND 30 L1 21 OSC2 41 LGOUT 29 42 LVDD LIN 20 OSC1 LOP 19 28 43 LOUDL LOUT ROP 18 BYPASS 0.47uF SDA R4 5 0.47uF SCL Source 4 L4 6 0.47uF ROUT 0.47uF 7 R3 1uF RB1 L3 Source 3 8 0.1uF RB2 0.1uF RT R2 14 9 1uF R2 10 L2 13 R4 0.47uF 11 0.47uF R3 Source 2 R1 12 L1 Source 1 100uF 8.2K 68n 480KHz 429KHz 220p 2 220p 220p PRE1.0 April, 2009 PT2335 ORDER INFORMATION Valid Part Number PT2335-LQ (L) Package Type 48 Pins, LQFP Top Code PT2335-LQ PIN CONFIGURATION PRE1.0 3 April, 2009 PT2335 PIN DESCRIPTION Pin Name RINN AVDD OE I/O I P I SD I SDA SCL ROUT RB1 RB2 RT R4 R3 R2 R1 RGOUT RIN LOUDR LOUDL LIN LGOUT L1 L2 L3 L4 LT LB2 LB1 LOUT OSC1 OSC2 OSC3 BYPASS VDD NC 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 O O I O I I I I I I O O O I O P P P I I O P P O O P P O I PRE1.0 Description Negative input of right channel Class-D amp Power input for analog circuits Output enable setting, connect a 0.22μF cap to GND Shutdown. Sets to low level will turn off whole chip and pull up to high level is back to normal operation. I2C bus data input I2C bus clock input Right channel line out Capacitor 1 for right channel bass controller Capacitor 2 for right channel bass controller Capacitor for right channel treble controller Input 4 of right channel Input 3 of right channel Input 2 of right channel Input 1 of right channel Right channel selector out Right volume controller input Right channel loudness capacitor Left channel loudness capacitor Left volume controller input Left channel selector out Input 1 of left channel Input 2 of left channel Input 3 of left channel Input 4 of left channel Capacitor for left channel treble controller Capacitor 2 for left channel bass controller Capacitor 1 for left channel bass controller Left channel line out 480KHz ceramic resonator output Ceramic resonator summing input 429KHz ceramic resonator output Bypass cap for internal voltage reference, a 2.2µF cap is recommended. Power input No connect Ground for analog circuits Negative input of left channel Class-D amp Positive input of left channel Class-D amp No connect Negative output of left channel Class-D amp Power ground of left channel Class-D amp Power input of left channel Class-D amp Positive output of left channel Class-D amp Positive output of right channel Class-D amp Power input of right channel Class-D amp Power ground of right channel Class-D amp Negative output of right channel Class-D amp No connect Positive input of right channel Class-D amp 4 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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 April, 2009 PT2335 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 PRE1.0 5 April, 2009