tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2353 v1.1 - 1 - november, 2003 satellite + subwoofer 3-speaker system electronics crossover ic PT2353 description PT2353 is a 3-speaker system electronic crosso ver ic utilizing cmos technology specially designed for the new generation of audio equipments. 3-channel electronic volume control, 2-channel 2nd order high pass filt er, 2nd order low pass filter and one mono subwoofer audio output are incorporated into a si ngle high performance chips. pt 2353 combines the electronic volume controller and crossover circuitry without mcu handling. pin assignments and application circuit are optimized for easy pcb la yout and cost saving advantages. features ? cmos technology ? low power consumption ? 2 built-in individual volume control: 0 db to -60db ? 2-channel 2nd order high pass filter + 1 mixed mono subwoofer low pass filter ? cross-over frequency adjustable by external passive components ? control interface of volume control: up/down key (mcu is not necessary) ? built-in 3d effect and loudness function ? supply voltage: 5v to 9v application ? audio equipments
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2353 v1.1 - 2 - november, 2003 satellite + subwoofer 3-speaker system electronics crossover ic PT2353 block diagram lin lout rin vdd ref ref ref ref ref vss mup sup 3d 3d pk po sdw rout sout subwoofer vo l u m e main vo l u m e main vo l u m e + + + 3d effect circuit hpf hpf lpf control unit +
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2353 v1.1 - 3 - november, 2003 satellite + subwoofer 3-speaker system electronics crossover ic PT2353 pin configuration 3d_led vdd rout rin rt cr1 cr2 cr3 c2 ref c1n c1p sout po pt235 3
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2353 v1.1 - 4 - november, 2003 satellite + subwoofer 3-speaker system electronics crossover ic PT2353 application circuit /3d vss lout lin lt cl1 cl2 cl3 /sup /sdw /mup /mdw osc /pk 3d_led vdd rout rin rt cr1 cr2 cr3 c2 ref c1n c1p sout po 100k 33k 10uf 10uf 100uf c2 c1 u33 3d /sup 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 2k2 220 c c c c /sdw /mup /mdw power key 100k 3d led 100uf 2k2 220 100k 8n2 10uf 1k bav99 10uf 100k 8n2 u33 1k 2u2 bav99 10uf 100k * l out vdd 9v vdd 9v vdd 9v r out vdd 9v r in ref ref ref s out l in ** ** ** ** notes: 1. please refer to the PT2353 crossover frequency response curve for the values of c, c1, and c2. 2. please refer to power control (po) section of this document. 3. ** for input port high voltage pulse protection. PT2353
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2353 v1.1 - 5 - november, 2003 satellite + subwoofer 3-speaker system electronics crossover ic PT2353 order information valid part number package type PT2353 28 pins, dip package (600 mil) PT2353-s 28 pins, so package (300 mil)
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