Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 3CH, 2.2W, Class-D Audio Power Amplifier PT2002 DESCRIPTION The PT2002 is a Class-D power amplifier designed for audio equipments, maximum output power can reach up to 2.2W x 3CH (VDD = 5V, RL = 4Ω, THD = 10%). The PT2002 composed of exclusively designed Class-D circuitry (patented) by PTC, along with the most advanced semi-conductor technology. Compare with traditional Class-AB amplifiers, the PT2002 performs much better power efficiency (>80%), less heat dissipation, and produces superior audio quality. External circuitry is very simple and flexible, 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 3 channels, differential analog input Maximum output power 2.2W(4Ω) x 3CH @ THD=10% No external LC low-pass filter required 20dB fixed voltage gain Contains shutdown function POP noise free during shutdown and power ON/OFF period User adjustable power-on delay timing Built-in short circuit protection Built-in overheat protection Low distortion (0.3%) High efficiency (>85%, 8Ω load), low heat dissipation SSOP 24 pins, 173 mil body width miniature packages APPLICATIONS • • • • • • Small multimedia speakers Laptop LCD monitor Portable DVD player Portable Media player Other audio applications PT2002 V1.0 -1- May, 2008 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 3CH, 2.2W, Class-D Audio Power Amplifier PT2002 PIN CONFIGURATION PT2002 V1.0 -2- May, 2008 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 3CH, 2.2W, Class-D Audio Power Amplifier PT2002 APPICATION CIRCUIT OUTPUT WITH FERRITE BEAD FILTER SW1 SHUTDOWN L1 FB C13 IC1 P3 CH3 C1 0.22uF C2 0.22uF R1 1K 1 2 R2 1K 3 4 P2 CH2 C3 0.22uF R3 C4 0.22uF 1K 5 C5 6 R4 1K 7 0.22uF 8 C8 1uF P1 CH1 C6 0.22uF C7 0.22uF R5 1K 9 10 11 R6 1K 12 IN3P IN3N PT2002 OUT3P VDD3 NC GND3 NC OUT3N IN2N OUT2N IN2P GND2 MCLR VDD2 VDD OUT2P GND OUT1P SD VDD1 IN1P GND1 IN1N OUT1N C12 10uF L2 FB TP2 GND 10uF L3 24 C9 1uF L4 21 L5 20 L7 13 C16 1n C17 1n 1 2 OUT2 FB SP1 FB 15 OUT3 SP2 L6 16 1 2 FB C10 1uF 17 14 C14 1n C15 1n FB 19 18 SP3 FB 23 22 TP1 Vcc C11 1uF L8 C18 1n C19 1n 1 2 OUT1 FB Notes: 1. Ferrite Bead specification: Z=120Ω@100MHz, Current>3A 2. R1, R2, R3, R4, R5, R6 is an optional for reduce gain only; in general application these resistors are not required. PT2002 V1.0 -3- May, 2008 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 3CH, 2.2W, Class-D Audio Power Amplifier PT2002 ORDER INFORMATION Valid Part Number PT2002-TX PT2002 V1.0 Package Type 24 Pins, TSSOP, 173mil -4- Top Code PT2002-TX May, 2008