preliminary pt2335 2w x 2 stereo integrated audio amplifier tel: 886-66296288 ? fax: 886-29174598 ? http://www.princeton.com.tw ? 2f, 233-1, baociao road, si ndian, taipei 23145, taiwan description the pt2335 is an integrated audio amplifier design for the low voltage (5v) application purpose, built-in stereo 2w class-d power amplifier with audio processor, it provides 4 stereo sources selector, and all signal process is based on pure analog processing to maintain high performances and low power consumption. the audio processor includes all the advanced control functions such like digital controlled volume, adaptive loudness, treble and bass control. it also provides line output fo r versatile application. the whole chip functions are controlled via i 2 c bus. applications ? portable player duck speaker system ? portable media player ? digital photo frame ? flat panel display and tv ? other audio applications features ? supply voltage: 3 ~ 6v ? 4 stereo inputs ? input gain selectable (0db, 3.75db, 7.5db, 11.25db) ? independent channel volume controller ? loudness function ? bass and treble control. ? 2w x 2 class-d power amplifier (vdd=5v, rl=4 ? ) ? 2 voltage gain setting for power amp (20db, 26db) ? internal and external oscillator selectable ? dual switching frequency for avoid am radio interference ? pop-free circuitry eliminates unpleasant noises during power on/off. ? low power shutdown ? high psrr ? over heat/over current protection circuitry ? controlled by i 2 c interface ? high power cmos processing ? lqfp 48 pins package block diagram l1 l2 l3 class-d lch 2w class-d rc h 2w r3 r2 r1 lop lon ro n ro p power management byp ass gnd agnd rvdd rgnd lvdd lgnd oe control interface sda scl sd rb1 rt rb2 treble r4 l4 rout ri np ri nn linn linp avdd vdd gain input lgout rgout ri n loudr volume lin loudl ba ss treble lout gain input volume ba ss lt lb1 lb2 ext osc osc1 osc2 osc3 int osc clock sel
pt2335 pre1.0 2 april, 2009 application circuit 0.1uf 1uf vdd 100uf 10uf rspk lspk 0.1u 2.2uf 820p 68n 68n 8.2k 820p 68n 68n 8.2k 0.47uf host mcu 0.47uf 0.47uf 0.47uf 0.47uf 0.47uf 0.47uf 0.47uf 0.47uf 0.1uf 0.47uf 0.47uf 0.22uf 0.47uf 2.2uf source 2 source 3 source 4 source 1 l1 l2 l3 l4 r1 r2 r3 r4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 rop rgnd nc rvdd ron rout lon lvdd nc lgnd lop l1 l2 l3 r1 r2 r3 rb1 rb2 rt lb1 lb2 lt lgout rgout avdd agnd bypass ri n loudr loudl sd oe osc1 sda scl nc osc2 l4 r4 vdd lout osc3 45 linn 46 linp 47 rinn 48 ri np lin pt2335 480khz 429khz 4.7k 4.7k 220p 220p 220p 1uf 0.1uf 0.1uf 1uf
pt2335 pre1.0 3 april, 2009 order information valid part number package type top code PT2335-Lq (l) 48 pins, lqfp PT2335-Lq pin configuration
pt2335 pre1.0 4 april, 2009 pin description pin name i/o description pin no. rinn i negative input of ri ght channel class-d amp 1 avdd p power input for analog circuits 2 oe i output enable setting, connect a 0.22 f cap to gnd 3 sd i shutdown. sets to low level will turn off w hole chip and pull up to high level is back to normal operation. 4 sda i i 2 c bus data input 5 scl i i 2 c bus clock input 6 rout o right channel line out 7 rb1 i capacitor 1 for right channel bass controller 8 rb2 o capacitor 2 for right channel bass controller 9 rt i capacitor for right channel treble controller 10 r4 i input 4 of right channel 11 r3 i input 3 of right channel 12 r2 i input 2 of right channel 13 r1 i input 1 of right channel 14 rgout o right channel selector out 15 rin i right volume controller input 16 loudr o right channel loudness capacitor 17 loudl o left channel loudness capacitor 18 lin i left volume controller input 19 lgout o left channel selector out 20 l1 i input 1 of left channel 21 l2 i input 2 of left channel 22 l3 i input 3 of left channel 23 l4 i input 4 of left channel 24 lt i capacitor for left channel treble controller 25 lb2 i capacitor 2 for left channel bass controller 26 lb1 o capacitor 1 for left channel bass controller 27 lout o left channel line out 28 osc1 o 480khz ceramic resonator output 29 osc2 i ceramic resonator summing input 30 osc3 o 429khz ceramic resonator output 31 bypass p bypass cap for internal voltage refe rence, a 2.2f cap is recommended. 32 vdd p power input 33 nc - no connect 34 agnd p ground for analog circuits 35 linn i negative input of left channel class-d amp 36 linp i positive input of left channel class-d amp 37 nc - no connect 38 lon o negative output of left channel class-d amp 39 lgnd p power ground of left channel class-d amp 40 lvdd p power input of left channel class-d amp 41 lop o positive output of left channel class-d amp 42 rop o positive output of right channel class-d amp 43 rvdd p power input of right channel class-d amp 44 rgnd p power ground of right channel class-d amp 45 ron o negative output of ri ght channel class-d amp 46 nc - no connect 47 rinp i positive input of right channel class-d amp 48
pt2335 pre1.0 5 april, 2009 important notice princeton technology corporation (ptc ) reserves the right to make co rrections, 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, taipei 23145, taiwan tel: 886-2-66296288 fax: 886-2-29174598 http://www.princeton.com.tw
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