tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2002 v1.0 - 1 - may, 2008 3ch, 2.2w, class-d audio power amplifier PT2002 description the PT2002 is a class-d power am plifier designed for audio equipments, maximum output power can reach up to 2.2w x 3ch (vdd = 5v, rl = 4 ? , 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 am plifiers, the PT2002 performs much better power efficiency (>80%), less heat dissipation, and produces s uperior audio quality. external circuitry is very simple and flexible, and consists of flawless self-pro tection capabilities. the chip?s packaging is small, thus it occupies an insignificant amount of spac e on the circuit board; t herefore, making it the predominant choice when it comes to audio amplifiers. features ? cmos technology ? 3 channels, differential analog input ? maximum output power 2.2w(4 ? ) 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%, 8 ? 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
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2002 v1.0 - 2 - may, 2008 3ch, 2.2w, class-d audio power amplifier PT2002 pin configuration
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2002 v1.0 - 3 - may, 2008 3ch, 2.2w, class-d audio power amplifier PT2002 appication circuit output with ferrite bead filter in3p 1 in3n 2 nc 3 nc 4 in2n 5 in2p 6 mclr 7 vdd 8 gnd 9 sd 10 in1p 11 in1n 12 out1n 13 gnd1 14 vdd1 15 out1p 16 out2p 17 vdd2 18 gnd2 19 out2n 20 out3n 21 gnd3 22 vdd3 23 out3p 24 ic1 PT2002 r1 1k r2 1k r3 1k r4 1k r5 1k r6 1k c1 0.22uf c2 0.22uf c3 0.22uf c4 0.22uf c6 0.22uf c7 0.22uf c8 1uf c5 0.22uf c9 1uf c10 1uf c11 1uf c14 1n c15 1n c16 1n c17 1n c18 1n c19 1n l1 fb l2 fb 1 2 sp 3 out3 1 2 sp 2 out2 1 2 sp 1 out1 c12 10uf tp1 vcc tp2 gnd p1 ch1 p2 ch2 p3 ch3 c13 10uf l3 fb l4 fb l5 fb l6 fb l7 fb l8 fb sw1 shutdown notes: 1. ferrite bead specification: z=120 ? @100mhz, current>3a 2. r1, r2, r3, r4, r5, r6 is an optional for reduce gain only; in general applicat ion these resistors are not required.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2002 v1.0 - 4 - may, 2008 3ch, 2.2w, class-d audio power amplifier PT2002 order information valid part number package type top code PT2002-tx 24 pins, tssop, 173mil PT2002-tx
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