PT2004 2.2w x 2 class-d audio power amplifier tel: 886-66296288 ? fax: 886-29174598 ? http://www.princeton.com.tw ? 2f, 233-1, baociao road, si ndian, taipei 23145, taiwan description the PT2004 is a class-d power amplifier designed for audio equipments, maximum output power can reach up to 2.2w x 2 (vdd=5v, rl=4 ? , thd=10%). the PT2004 composed of exclusively designed class-d circuitry (patented) by ptc, along with the most advanced semi-conductor fabricate technology. when compared to the traditional class-ab amplifiers, the PT2004?s shows much higher efficiency (> 80%), low heat dissipat ion, and also performs superior audio quality. the PT2004?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. applications ? mobile phone ? portable media player ? personal navigation device ? hands-free phone features ? cmos technology ? stereo differential analogue input ? maximum output power 2.2w(4 ? ) 2 @ thd=10% ? output low-pass lc filter is not necessary ? low emi radiation, cispr 22 regulation compliant ? 4 level voltage gain selection ? contains shutdown function for individual channel ? fast start-up time (3.5ms) when shutdown awake up ? built-in short circuit protection ? built-in over-temperature protection ? high efficiency (85%, 8 ? load), low heat dissipation ? wafer level wlcsp 16 balls package block diagram PT2004 internal block diagram (diagram shows single channel only) a1 r4 r3 inl+ inl- a2 vref sq-wave generator vref a3 vref comp gate driver pvdd outl+ pgnd pvdd outl- pgnd and control logic g1 sdr power management r1 r2 g0 sdl vref agnd avdd 300k 300k
PT2004 v1.0 2 appication circuit diagram (1) single-ended input inl+ a1 inl- b1 inr- c1 inr+ d1 pvdd a2 g1 b2 g0 c2 avdd d2 outr + d3 agnd c3 sdr b3 outl+ a3 outr- d4 pgnd c4 sdl b4 outl- a4 PT2004 0.22uf 0.22uf 0.22uf 0.22uf lin rin 1uf vdd fb fb fb fb 1n 1n 1n 1n l spk r sp k gain control shutdown control (2) differential input inl+ a1 inl- b1 inr- c1 inr+ d1 pvdd a2 g1 b2 g0 c2 avdd d2 outr+ d3 agnd c3 sdr b3 outl+ a3 outr - d4 pgnd c4 sdl b4 outl- a4 PT2004 0.22uf 0.22uf 0.22uf 0.22uf lin- lin+ rin+ 1uf vdd fb fb fb fb 1n 1n 1n 1n l spk r sp k gain control shutdown control rin- ferrite bead (fb) specification: z = 220 ? @100mhz, current capability > 2a.
PT2004 v1.0 3 order information valid part number package type top code PT2004-cs 16 balls, wlcsp PT2004 pin configuration (top view) pin description pin i/o symbol function a1 i inl+ left channel input (+) b1 i inl- left channel input (-) c1 i inr- right channel input (-) d1 i inr+ right channel input (+) a2 power pvdd output supply b2 i g1 gain setting 1 c2 i g0 gain setting 0 d2 power avdd analog supply a3 o outl+ left channel output (+) b3 i sdr right channel shutdown c3 power agnd analog ground d3 o outr+ right channel output (+) a4 o outr- left channel output (-) b4 i sdl left channel shutdown c4 power pgnd power ground d4 o outr- right channel output (-)
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