PT2369 4 Inputs, 2.6Wx2 Class-AB Audio Amplifier with I2C Volume DESCRIPTION The PT2369 is an audio amplifier design for the low voltage (5V) application purpose, built-in stereo 2.6W Class-AB power amplifier with 32 steps I2C controlled volume, it also provides 4 sources selector, and unique noise suppressor circuit eliminates unpleasant pop noise during power or shutdown on/off, and provides SE/BTL selection for headphone connection. APPLICATIONS • • • • • Portable DVD player Portable audio system Docking speaker system Flat panel monitor Other audio applications FEATURES • Supply voltage: 3~6V • 4 Stereo inputs • 32 steps, I2C controlled volume from -40dB to +26dB (BTL) • 2.6W x 2 Class-AB Power Amplifier (VDD=5V, RL=4Ω, THD=10%) • BTL and SE output selectable • Pop-Free circuitry eliminates unpleasant noises during power ON/OFF and changing the input source. • Low power shutdown • Over Temperature Protection • Over Current Protection • TSSOP 24 pin package with thermal pad BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2369 APPLICATION CIRCUIT ORDER INFORMATION Part Number PT2369-HT V1.1 Package Type 24 pins, HTSSOP, 173mil 2 Top Code PT2369-HT February 2012 PT2369 PIN CONFIGURATION PIN DESCRIPTION Pin Name IN4L IN3L IN2L IN1L AVDD BYPASS AGND MUTE IN1R IN2R IN3R IN4R SDA SCL RVDD ROUTRGND ROUT+ LOUT+ LGND LOUTLVDD SD SE/BTL V1.1 I/O I I I I P I P I I I I I I I I O P O O P O P I I Description Left channel positive input 4 Left channel positive input 3 Left channel positive input 2 Left channel positive input 1 Power input for volume control Internal 1/2 reference bypassing Ground for volume control Mute Input, H=muted, L=normal (internal pull down) Right channel positive input 1 Right channel positive input 2 Right channel positive input 3 Right channel positive input 4 I2C data input I2C clock input Right channel power input Right channel negative output Power GND Right channel positive output Left channel positive output Power GND Left channel negative output Left channel power input Shutdown, L=shutdown, H=normal operate. L=BTL (speaker out), H=SE (Headphone out) 3 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 February 2012 PT2369 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 V1.1 12 February 2012