Description Features Applications

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Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Satellite + Subwoofer 3-Speaker System Electronic Crossover IC PT2352 DESCRIPTION PT2352 is a 3-speaker system electronic crossover IC utilizing CMOS Technology specially designed for the new generation of audio equipment. A 3-channel electronic volume control, 2-channel 2nd order high pass filter, 2nd order low pass filter, and one mono subwoofer audio output are incorporated into a single high performance chip. PT2352 combines the electronic volume controller and crossover circuitry without MCU handling. The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. FEATURES • • • • • • • • CMOS Technology Low Power Consumption 2 Built-in Individual Volume Control: 0 dB to -68dB 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 APPLICATIONS • Audio Equipments PT2352 v1.0 -1- November, 2003 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Satellite + Subwoofer 3-Speaker System Electronic Crossover IC PT2352 BLOCK DIAGRAM LIN Main Volume LOUT HPF ROUT 3D Effect Circuit V REF RIN HPF Main Volume V REF V REF VDD + + LPF Subwoofer Volume REF + SOUT VSS V REF PT2352 v1.0 PO 3D_LED PK 3D SDW SUP MUP Control Unit -2- November, 2003 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Satellite + Subwoofer 3-Speaker System Electronic Crossover IC PT2352 PIN CONFIGURATION 3D_LED VDD ROUT RIN RT CR1 CR2 CR3 C2 REF C1N C1P SOUT PO PT2352 PT2352 v1.0 -3- November, 2003 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Satellite + Subwoofer 3-Speaker System Electronic Crossover IC PT2352 APPLICATION CIRCUIT VDD 9V VDD 9V 3D LED 3D 1 2 L OUT 100K 3 /3D VSS LOUT 3D_LED 28 VDD 27 100uF ROUT 26 10uF VDD 9V 10uF L IN ** 1K 100K 10uF 4 LIN RIN 25 5 LT RT 24 2K2 8n2 ** BAV99 6 220 u33 CR1 CL1 C 220 8 CL3 PT2352 CR3 21 /SUP 9 /SUP C2 20 /SDW 10 /SDW REF 19 CL2 C 8n2 R IN 10uF ** BAV99 100K u33 C REF C REF C2 100uF /MUP 11 /MUP C1N 18 /MDW 12 /MDW C1P 17 SOUT 16 33K ** 1K 23 22 7 VDD 9V 2K2 CR2 REF R OUT 100K 13 OSC C1 10uF S OUT 100K 2u2 14 PO /PK 15 Power Key * Notes: 1. Please refer to the PT2352 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. PT2352 v1.0 -4- November, 2003 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Satellite + Subwoofer 3-Speaker System Electronic Crossover IC PT2352 ORDER INFORMATION Valid Part Number PT2352 PT2352-S PT2352 v1.0 Package Type 28 Pins, DIP Package (600 mil) 28 Pins, SO Package (300 mil) -5- November, 2003