Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw 2.2W×2 Class-D Audio Power Amplifier Preliminary PT2332 DESCRIPTION The PT2332 is a CLASS-D power amplifier designed for audio equipments, maximum output power can reach up to 2.2W x 2 (VDD = 5V, RL = 4Ω, THD = 10%). The PT2332 composed of exclusively designed CLASS-D circuitry (patented) by PTC, along with the most advanced semi-conductor technology. When compared to the traditional CLASS-AB amplifiers, the PT2332’s has a much higher efficiency (> 80%), low heat dissipation, and produces superior audio quality. PT2332’s external circuitry is simple and easily accessible, and consists of flawless self-protection capabilities. The chip’s packaging is small, thus it occupies an insignificant amount of space on the circuit board; therefore, making it the predominant choice when it comes to audio amplifiers. FEATURES • • • • • • • • • • • • CMOS Technology Stereo differential analogue input Maximum output power 2.2W(4Ω) × 2 @ THD=10% Output low-pass LC filter is not necessary Preset 2 voltage gain selection (20dB and 26dB) Contains shutdown function POP noise free in shutdown changed and power ON/OFF period Built-in short circuit protection Built-in overheat protection Low harmonic distortion (0.1%), superior sound quality High efficiency (8Ω load > 85%), low heat dissipation SOP-16 pins and SSOP-16 pins, miniature packages APPLICATIONS • • • • • • • Portable Media Player Portable DVD Player LCD Monitor Small multimedia speakers Hand-free phone Laptop Other audio applications PT2332 PRE1.0 -1- September, 2006 Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw 2.2W×2 Class-D Audio Power Amplifier Preliminary PT2332 PIN CONFIGURATION 1 INRP OUTRP 16 2 INRN GNDR 15 3 VCC VDDR 14 4 GAIN OUTRN 13 5 /SD OUTLN 12 6 GND VDDL 11 7 INLN GNDL 10 8 INLP OUTLP 9 PIN DESCRIPTION Pin I/O Symbol Function Pin I/O Symbol Function 1 I INRP Right channel input (+) 9 O OUTLP Left channel output (+) 2 I INRN Right channel input (-) 10 Power GNDL Ground (Left channel) 3 Power VCC Power input 11 Power VDDL Left channel power input 4 I GAIN Gain setting 12 O OUTLN Left channel output (-) 5 I /SD Shutdown 13 O OUTRN Right channel output (-) 6 Power GND Ground 14 Power VDDR Right channel power input 7 I INLN Left channel input (-) 15 Power GNDR Ground (Right channel) 8 I INLP Left channel input (+) 16 O OUTRP Right channel output (+) PT2332 PRE1.0 -2- September, 2006 Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw 2.2W×2 Class-D Audio Power Amplifier Preliminary PT2332 APPICATION CIRCUIT DIAGRAM (1) DIRECT DRIVING LOAD VCC C9 10uF C2 P1 AINR C3 1 0.22uF 2 0.22uF C8 3 0.1uF GAIN IC1 4 5 6 /SD C4 7 0.22uF C5 P2 AINL 8 0.22uF INRP OUTRP INRN GNDR VCC VDDR GAIN OUTRN /SD OUTLN GND VDDL INLN GNDL INLP OUTLP P3 OUTRP 16 15 14 C6 1uF P4 OUTRN 13 12 P5 OUTLN 11 10 C7 1uF 9 P6 OUTLP PT2332 (The system must have well radiation shielded in direct driving load) (2) OPERATION USING OUTPUT FILTER VCC C9 10uF C2 P1 AINR C3 0.22uF 0.22uF C8 0.1uF GAIN 1 2 3 4 5 6 /SD C4 P2 AINL PT2332 PRE1.0 7 0.22uF C5 0.22uF 8 IC1 INRP OUTRP INRN GNDR VCC VDDR GAIN OUTRN /SD OUTLN GND VDDL INLN GNDL INLP PT2332 -3- OUTLP L1 16 22uH 15 14 C6 1uF 13 L2 12 L3 22uH 9 C10 0.33uF C11 0.33uF P4 OUTRN 22uH P5 OUTLN C12 0.33uF L4 C13 0.33uF 11 10 P3 OUTRP C7 1uF 22uH P6 OUTLP September, 2006 Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw 2.2W×2 Class-D Audio Power Amplifier Preliminary PT2332 (3) OPERATION WITH FERRITE BEAD AT THE OUTPUT VCC C9 10uF C2 P1 AINR C3 0.22uF 0.22uF C8 0.1uF GAIN IC1 1 2 3 4 5 6 /SD C4 P2 AINL 0.22uF 7 C5 8 0.22uF INRP OUTRP INRN GNDR VCC VDDR GAIN OUTRN /SD OUTLN GND VDDL INLN GNDL INLP OUTLP PT2332 L1 16 FB 15 14 C6 1uF 13 L2 12 L3 10 9 C11 1nF FB FB 11 C10 1nF C7 1uF L4 FB C12 1nF C13 1nF P3 OUTRP P4 OUTRN P5 OUTLN P6 OUTLP Ferrite Bead specification: Z=80Ω@100MHz PT2332 PRE1.0 -4- September, 2006 Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw 2.2W×2 Class-D Audio Power Amplifier Preliminary PT2332 ORDER INFORMATION Valid Part Number PT2332-S PT2332-X PT2332 PRE1.0 Package Type 16 Pins, SOP, 150mil 16 Pins, SSOP, 150mil -5- Top Code PT2332-S PT2332-X September, 2006