Tone Control Subwoofer Cross-Over Low Pass Filter IC

Ref. No. 2350 v1.1

3

Written July 1999

Princeton Technology Corp.

Tel: 886-2-29162151

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

PT2350

APPLICATION CIRCUIT

Notes: 1. If you use the above values: Treble Control Range = 4KHz + 10 dB

Bass Control Range = 50 Hz + 10 dB

Subwoofer Output Roll-Off Point is at -3dB at 130Hz

Slope Rate = -12dB/oct

2. It is recommended that you use Mylar or Metal Capacitors for better audio quality.

3. Please do not connect 0.1µF or any by-pass capacitor between the GND and VDD.

1

2

3

0.005uF

CH2

Right Channel Treble Control VR

CL2

0.05uF

1

1

3

3

2

2

10K

100K (B) VR

100K (B) VR

Right Channel Bass Control VR

LIN

LB1

LB2

LB3

LT1

LT2

LOUT

VREF

C2

Vss

RIN

RB1

RB2

RB3

RT1

RT2

ROUT

SOUT

C1

VDD

PT2350

4.7uF/16V

0.15uf

+

+

4.7uF/16V

Left

Channel Output

1

2

3

0.005uF

CH1

Left Channel Treble Control VR

CL1

0.05uF

1

3

2

10K

100K (B) VR

100K (B) VR

Left Channel Bass Control VR

+

1

2

3

4.7uF

Left

Channel Input

4.7uF

Right

Channel Input

10K VR

(A)

Right

Channel Output

4.7uF/16V

4.7uF/16V

Subwoofer Output

0.068uF

C1

220Ohms

12V

100uF

8.2VZD

10KVR

(A)