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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 I2C 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 (8) 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 I2C bus Dual headphone output mode Integrated. (PT2307-A or PT2307-B) Mute function Shutdown (power save) mode I2C 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
PIN CONFIGURATION
L1L L2L MIC1 VS S2 SCL SDA VCC MICOUT MIC2 L1R 1 2 3 4 5 6 7 8 9 11 24 23 22 21 20 MIC_S ENS E HP_S ENSE LOUT VP 1 SP + VE E(*) SP VP 2 ROUT VS S1 /SHUT DOWN MUTE
PT23 07
19 18 17 16 15 14 13
L2R 10 REF 12
Note: *=PIN 19 OF PT2307-A IS VEE, PIN 19 OF PT2307-B IS NC.
PT2307 V1.2
-2-
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 1F 10K R3
10 F
Cb1
MICROPHONE JACK
C8 INTERNAL MICIN 1F C2 MICOUT 1F C7 L1L 1F C6 L2L 1F 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
1F C5 RR1 24K + 1F Cb
10 L2R 11 L1R 12 REF
/SHUTDOWN MUTE
L1R
1F
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
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
1W Audio Power Integration Amplifier
PT2307
ORDER INFORMATION
Valid Part Number PT2307 Package Type 24 Pins, TSSOP, 173mil Top Code PT2307
PT2307 V1.2
-4-
April, 2006

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