DESCRIPTION APPLICATION FEATURES BLOCK DIAGRAM

PT12913
2 Band Car Audio Processor
DESCRIPTION
FEATURES
 3 SE stereo inputs and 1 Quasi-Differential input
with selectable input gain
 Input gain control: 0 to +20dB, 1dB/step
 2 channels electronic volume with soft step
function: +15 to -79dB with 1dB/step
 Soft mute
 Tone control (Bass and Treble): -20 to +20dB,
1dB/step with softstep
. Bass: f0=100Hz, Q=1.0
. Treble: f0=10KHz, Q=1.25
 Loudness: 0 to 20dB, 1dB/step with softstep
function.
 4 independent speaker outputs with softstep
volume: +15 to -79dB with 1dB/step
2
 Controlled by I C BUS interface
 Low distortion and low noise
 20-pin SSOP package
The PT12913 is a 2 band audio signal processor
specially designed for car radio applications. The
device includes a high performance audio processor
with fully integrated audio filters. The digital control
allows programming in a wide range of filter
characteristics.
APPLICATION
 Car Audio System
BLOCK DIAGRAM
Mute
11
SE1L
2
SE1R
3
Input Gain
SE2L
4
SE2R
5
SE3L
6
SE3R
7
DIFFL
8
DIFFG
9
DIFFR
10
Soft-step
Loudness
Soft-Mute
Soft-step
Volume
Soft-step
2 Band EQ
(Tone Control)
Soft-step
MonoFader
16
OUTLF
Soft-step
MonoFader
15
OUTRF
Soft-step
MonoFader
14
OUTLR
Soft-step
MonoFader
13
OUTRR
INPUT
MULTIPLEXER
DIGITAL
CONTROL
SUPPLY
I2C BUS
17
20
1
18
19
VDD
GND
CREF
SCL
SDA
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian Dist., New Taipei City 23145, Taiwan
PT12913
APPLICATION CIRCUIT
10μF
1
CREF
GND
20
2
SE1L
SDA
19
3
SE1R
SCL
18
4
SE2L
VDD
17
5
SE2R
OUTLF
16
2.2μF
2.2μF
2.2μF
2.2μF
PT12913
10μF
47k
10μF
47k
10μF
47k
10μF
47k
2.2μF
SE3L
6
OUTRF
15
2.2μF
SE3R
7
OUTLR
14
2.2μF
8
DIFFL
OUTRR
13
10μF
9
DIFFG
NC
12
10
DIFFR
MUTE
11
2.2μF
ORDER INFORMATION
Part Number
PT12913-X
V1.2
Package Type
20 Pins, SSOP, 150mil
2
Top Code
PT12913-X
April 2015
PT12913
PIN CONFIGURATION
CRE F
1
20
GND
S E1 L
2
19
S DA
S E1 R
3
18
S CL
S E2 L
4
17
V DD
S E2 R
5
16
OUT LF
S E3 L
6
15
OUT RF
S E3 R
7
14
OUT LR
DIFFL
8
13
OUT RR
DIFFG
9
12
NC
DIFFR
10
11
MUT E
PT12913
PIN DESCRIPTION
Pin Name
CREF
SE1L
SE1R
SE2L
SE2R
SE3L
SE3R
DIFFL
DIFFG
DIFFR
Mute
N.C
OUTRR
OUTLR
OUTRF
OUTLF
VCC
SCL
SDA
GND
V1.2
I/O
O
I
I
I
I
I
I
I
I
I
I
O
O
O
O
I
I/O
-
Description
Reference capacitor
Single-ended input 1 left channel
Single-ended input 1 right channel
Single-ended input 2 left channel
Single-ended input 2 right channel
Single-ended input 3 left channel
Single-ended input 3 right channel
Quasi-differential input left channel
Quasi-differential input ground
Quasi-differential input right channel
Hardware/external Mute control pin
No connection
Rear right output
Rear left output
Front right output
Front left output
Power supply
2
I C bus clock
2
I C bus data
Ground
3
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
April 2015
PT12913
IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, 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
V1.2
20
April 2015