Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
1W Audio Power Integration Amplifier
PT2307
DESCRIPTION
The PT2307 is an integration audio power amplifier IC utilizing advanced CMOS technology.
Supports 2 mono MIC input and 2 stereo line input, input gain of each amp can be set individually to
meet customers’ needs. Built-in digital controlled volume has 32 steps from 0dB ~ -90dB, the
headphone volume control has 8 steps ranging from 0dB ~ -10.5dB which can be further attenuate
from the main volume. All functions can be controlled via I
2
C bus. In the output section, the PT2307 is
equipped with both stereo headphone driver and mono speaker amp maximum output up to 1 watt.
The PT2307 also equipped “Energy Save” power management systems; user can turn off the unused
portion to minimize total power consumption for extended battery endurance. For different applications,
the headphone section of the PT2307 has two mode types for different purposes, A-type (Output
Capacitor-less) or B-type (Output with Capacitor).
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1W (8Ω) mono channel speaker output + stereo headphone driver
Digital controlled volume
Main volume: 32 steps/0dB ~ -90dB
Headphone volume: 8 steps/0dB ~ -10.5dB
2 microphone inputs, 1 microphone output
2 stereo audio inputs, selected via I
2
C bus
Dual headphone output mode Integrated. (PT2307-A or PT2307-B)
Mute function
Shutdown (power save) mode
I
2
C register keeps the last status when the shutdown active
Each section can be turn off individually for most power saving
Over Temperature protection
Very low pop noise when mode changed
Wide operating voltage: 2V ~ 6V
Available in 24 Pins TSSOP
APPLICATIONS
•
•
•
•
•
•
PDA
Portable mini audio system
Multimedia audio household appliances system
Electronic Dictionary
Translator
GPS
PT2307 V1.2
-1-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
1W Audio Power Integration Amplifier
PT2307
APPLICATION CIRCUIT I (PT2307-A)
VCC
4.7K
J1
EXTERNAL MICIN
2
4
3
1
4.7K
C9
1 F
10K
R3
10 F
Cb1
MICROPHONE JACK
C8
INTERNAL MICIN
1 F
C2
MICOUT
1 F
C7
L1L
1 F
C6
L2L
1 F
SCL
VCC
+
SDA
R4
10K
RL1 24K
1
2
3
4
5
6
7
8
L1L
L2L
MIC1
VSS2
SCL
SDA
VCC
MICOUT
MIC2
MIC_SENSE 24
HP_SENSE 23
LOUT 22
VP1 21
SP+ 20
VEE 19
SP- 18
VP2 17
ROUT 16
VSS1 15
/SHUTDOWN 14
MUTE 13
100 F
VCC
+ +
VCC
RL2 24K
2
4
3
1
J1
EARPHONE JACK STEREO
8
100 F
C4
RR2 24K
9
C3
100 F
L2R
1 F
C5
RR1 24K
+
1 F
Cb
10 L2R
11 L1R
12 REF
/SHUTDOWN
MUTE
L1R
1 F
PT2307
0
Notes:
1. The (+) polarity of DC block capacitor installed in the I/O pin of the PT2307 should face towards the
higher potential.
2. HP_SENSE (Pin 23) must be connected to Pin22 LOUT.
3. The gain setting resistors (R3, R4, RL1, RL2, RR1, RR2) should keep as close as possible with the
PT2307 chip to prevent pick-up noises.
4. DO NOT CONNECT HEADPHONE COMMON (VEE) TO OTHER AUDIO EQUIPMENT! THIS
MAY CAUSE IC DAMAGE.
PT2307 V1.2
-3-
April, 2006
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
