PT2811 3W Stereo Class-D Amplifier with Audio Processor DESCRIPTION FEATURES The PT2811 is an integrated 3W stereo Class-D amplifier with audio processor. The input selector supports 3 Single-Ended and 1 Fully-Differential input can be chose. The highly integration of the audio processor and class-D amplifier can further reduce external components BOM and provides better audio experience. All of functions are controlled via I2C bus. APPLICATIONS PC/Video Projector Portable media player Audio duck system Flat panel display with audio inputs Supply Voltage: 3~6V 3W X 2 Class-D power amplifier (VDD=5V, RL=4Ω) 1 Fully-Differential input 3 Single-Ended audio inputs Programmable input gain from 0 to +15dB Bass and Treble control Master volume in 1dB/step from 0 to -79dB Advanced soft-mute and multiple soft-step volume technology eliminate audible click during volume and input sources changing. Built-in RF noise filter Shutdown function for power saving Over temperature and over current protection 2 Controlled by I C interface Available in 48 Pins, LQFP package block diagram LON LGND LVDD LOP ROP RVDD RGND RON LINP RINP LCH CLASS-D (+20/+26 dB) RCH CLASS-D (+20/+26 dB) OSC Generator LINN RINN SD OE SDA VDD Digital Interface Bypass Logic Control SCL GND Power Management LOUT ROUT LB2 RB2 Bass Bass LB1 LT RB1 Volume Soft Step (0~-79dB) Treble Volume Soft Step (0~-79dB) Treble Soft Mute Soft Mute Protection Circuitry INPUT Gain Fully-Differential input INPUT Multiplexer L3 L2 RT L1 DIFFL+ DIFFL- DIFFR- INPUT Gain INPUT Multiplexer DIFFR+ R1 R2 R3 Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan PT2811 3W Stereo Class-D Amplifier with Audio Processor APPLICATION CIRCUIT R2 L1 8.2K C1 C36 C35 1uF 1uF 1uF 68nF 1uF C4 68nF C22 C5 10 9 8 7 6 5 4 3 2 1 RB2 RB1 ROUT SCL SDA SD VDD2 VDD1 NC RINP RINN L2 GND NC 48 RON 47 R2 NC 46 R1 RGND 45 17 DIFFR+ RVDD 44 18 DIFFR- ROP 43 DIFFL- 20 DIFFL+ PT2811 LOP 21 L1 LGND 40 22 L2 NC 39 LINN NC 34 35 36 32 LINP GND1 31 33 GND2 30 NC OE BYPASS 29 28 37 LOUT NC 27 NC LB1 24 26 38 LB2 LON 25 L3 LT 23 C33 C34 10uF 10uF 100uF L3 FB C27 1uF 42 LVDD 41 C32 L4 FB L5 FB C26 1uF L6 FB C30 1nF C31 1nF 19 P2 FB C28 1nF C29 1nF 16 11 15 Host MCU RT TV Tuner R3 +5V 12 Audio 14 2nF BT NC C6 AUX 13 P1 FB U1 RSPK U2 LSPK Lowpass Filter (option) C25 1uF 1uF C37 1uF C2 C21 2.2uF C18 68nF 2nF C17 68nF C16 R6 8.2K BT=Bluetooth module with fully differential output. The ferrite bead lowpass filter is an optional item; it is useful to reduction the EMI emission. V1.1 2 January 2014 PT2811 3W Stereo Class-D Amplifier with Audio Processor ORDER INFORMATION Valid Part Number Package Type Top Code PT2811-LQ 48 Pins, LQFP, 7 X 7 mm PT2811-LQ V1.1 38 37 NC 42 LOP LON 43 ROP 39 44 RVDD NC 45 RGND 2 40 46 NC RINN LGND 47 RON 1 LVDD 41 48 NC PIN CONFIGURATION NC 36 RINP LINN 35 3 NC LINP 34 4 VDD1 NC 33 5 VDD2 GND1 32 6 SD GND2 31 7 SDA OE 30 8 SCL 9 ROUT LOUT 28 10 RB1 LB1 27 11 RB2 LB2 26 12 RT LT 25 PT2811 NC R3 R2 R1 DIFFR+ DIFFR- DIFFL- DIFFL+ L1 L2 L3 NC 13 14 15 16 17 18 19 20 21 22 23 24 BYPASS 29 3 January 2014 PT2811 3W Stereo Class-D Amplifier with Audio Processor PIN DESCRIPTION Pin Name RINN RINP NC VDD1 VDD2 I/O I I P P SD I SDA SCL ROUT RB1 RB2 RT NC R3 R2 R1 DIFFR+ DIFFRDIFFLDIFFL+ L1 L2 L3 NC LT LB2 LB1 LOUT BYPASS OE GND2 GND1 NC LINP LINN NC NC LON NC LGND LVDD LOP ROP RVDD RGND NC RON NC I I O I O I I I I I I I I I I I I O I O P I P P I I O P P O O P P O - V1.1 Description Pin No. Negative input of right channel Class-D amp 1 Positive input of right channel Class-D amp 2 No connection 3 Power input for internal circuits 4 Power input for internal circuits 5 Shutdown control pin. Sets to “logic-low” will turn off whole chip and pull up to 6 “logic-high” to back to normal operation. 2 I C bus data input 7 2 I C bus clock input 8 Right channel line out 9 Capacitor 1 for right channel Bass controller 10 Capacitor 2 for right channel Bass controller 11 Capacitor for right channel Treble controller 12 No connection 13 Input 3 of right channel 14 Input 2 of right channel 15 Input 1 of right channel 16 Differential right channel “+” input 17 Differential right channel “-” input 18 Differential left channel “-“ input 19 Differential left channel “+” input 20 Input 1 of left channel 21 Input 2 of left channel 22 Input 3 of left channel 23 No connection 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 Bypass cap for Internal Voltage Reference, a 2.2µF cap is recommended. 29 30 Output Enable setting, connect a 0.22F cap to GND. Ground 31 Ground 32 No connection 33 Positive input of left channel Class-D amp 34 Negative input of left channel Class-D amp 35 No connection 36 No connection 37 Negative output of left channel Class-D amp 38 No connection 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 No connection 46 Negative output of right channel Class-D amp 47 No connection 48 4 January 2014 PT2811 3W Stereo Class-D Amplifier with Audio Processor 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 V1.1 22 January 2014