Document
1 Watt Audio Power Amplifier
DESCRIPTION
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
PT2301
PT2301 is a multi-purpose audio power amplifier IC utilizing advanced CMOS technology. PT2301 includes 2 microphone inputs and 2 stereo line inputs. PT2301 supports headphone stereo sound output and a single channel loudspeaker output terminal. PT2301 is a low noise power amplifier with a maximum output of 1 watt. It uses the I2C protocol and has a broad volume control range (+15dB ~ -90dB).
FEATURES
• 1W (8 Ω) single channel loudspeaker output + stereo headphones driver • Digital volume control (49 steps /+15dB ~ -90dB) • 2 microphone inputs, 1 microphone output • The output-port does not need to be connected to the AC capacitor (PT2301-A) • Standby mode and Mute function • Thermal shutdown protection circuit • Energy Save function • Extremely low (POP) noise • Wide working voltage range: 2.7V ~ 5.5V • Low THD: earphone < 0.07%, speaker < 0.03% • Available in 24 Pin, TSSOP Package
APPLICATIONS
• Electronic dictionary • PDA • DSC (Digital Still Camera)
PT2301 v1.2
-1-
August, 2004
1 Watt Audio Power Amplifier
PIN CONFIGURATION
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
PT2301
L1L 1 L2L 2 MIC1 3 VSS2 4 SCL 5 SDA 6 VCC 7 MICOUT 8 MIC2 9 L2R 10 L1R 11 REF 12
PT2301
Note: PT2301-A Pin 19 is VEE, PT2301-B Pin 19 is NC.
24 MIC_SENSE 23 HP_SENSE 22 LOUT 21 VP1 20 SP+ 19 VEE (*) 18 SP17 VP2 16 ROUT 15 VSS1 14 /SHUTDOWN 13 MUTE
PT2301 v1.2
-2-
August, 2004
1 Watt Audio Power Amplifier
APPLICATION CIRCUIT I (PT2301-A)
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
PT2301
VCC
J1 2 4
EXTERNAL MICIN
C9 1 F 3
1
MICROPHONE JACK 0
R3 10K
INTERNAL MICIN
C8 1 F R4 10K C2 1 F
MICOUT
C7 1 F RL1 24K
L1L C6 1 F
L2L RL2 24K
VCC
+
100 F
SCL SDA
L2R L1R
0 C4 1 F RR2 24K
C5 1 F RR1 24K
0
4.7K
4.7K
Cb1 10 F 0
1 L1L
MIC_SENSE 24
2 L2L
HP_SENSE 23
3 MIC1
LOUT 22
4 VSS2
VP1 21
5 SCL
SP+ 20
6 7 8 9 10 11 12 Cb 1F
SDA VCC
PT2301-A
VEE 19 SP- 18
MICOUT
VP2 17
MIC2
ROUT 16
L2R
VSS1 15
L1R
/SHUTDOWN 14
REF
13 MUTE
J1 2 4
3 1 VCC
EARPHONE JACK STEREO
8 ohm
VCC ++
100 F
C3 100 F
0 /SHUTDOWN
MUTE
Note 1: I/O capacitance’s positive should face to high level. Note 2: Pin23 HP_SENSE should connect to Pin22 LOUT。
Note 3: When you layout, input resistors R3、R4、RL1、RL2、RR1、RR2 as far as possible near to
PT2301.
PT2301 v1.2
-3-
August, 2004
1 Watt Audio Power Amplifier
APPLICATION CIRCUIT II (PT2301-B)
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
PT2301
VCC
J1 2 4
EXTERNAL MICIN
C9 1 F 3
1
MICROPHONE JACK 0
R3 10K
INTERNAL MICIN
C8 1 F R4 10K C2 1 F
MICOUT
C7 1 F RL1 24K
L1L C6 1 F
L2L RL2 24K
VCC
+
100 F
SCL SDA
0 C4 1 F RR2 24K L2R
C5 1 F
L1R RR1 24K
4.7K
4.7K Cb1 10 F
VCC
1 L1L
MIC_SENSE 24
2 L2L
HP_SENSE 23
3 MIC1
LOUT 22
4 VSS2
VP1 21
5 SCL
SP+ 20
6 7 8 9 10 11 12 Cb 1F
SDA VCC
PT2301-B
VEE 19 SP- 18
MICOUT
VP2 17
MIC2
ROUT 16
L2R VSS1 15
L1R /SHUTDOWN 14
REF
13 MUTE
R8 10K
R7 10K
C11 300 F
VCC
C12 300 F
8 ohm
VCC ++
100 F
C3 100 F
0 /SHUTDOWN
MUTE
R9 1K
R10 1K
J1 2 4
3 1
EARPHONE JACK STEREO
Note 1: I/O capacitance’s positive should face to high level. Note 2: Pin23 HP_SENSE should connect to Pin22 LOUT。
Note 3: When you layout, input resistors R3、R4、RL1、RL2、RR1、RR2 as far as possible near to
PT2301.
PT2301 v1.2
-4-
August, 2004
1 Watt Audio Power Amplifier
ORDER INFORMATION
Order Part Number PT2301-A PT2301-B
PT2301-A (L) PT2301-B (L)
Package Information 24 Pins, TSSOP, 173 mil 24 Pins, TSSOP, 173 mil 24 Pins, TSSOP, 173 mil 24 Pins, TSSOP, 173 mil
Notes: 1. (L) = Lead Free 2. The Lead Free mark is put in front of the date code.
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
PT2301
Top Code PT2301-A PT2301-B PT2301-A PT2301-B
PT2301 v1.2
-5-
August, 2004
.