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| Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 1 Watt Audio Power Amplifier PT2301 DESCRIPTION The PT2301 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 volumes have 49 steps from +15dB ~ -90dB and all the functions can be controlled via I2C bus. In the output section, the PT2301 is equipped with both stereo headphone driver and mono speaker amp maximum output up to 1 watt. The PT2301 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 PT2301 has two mode types for different purposes, A-type (Output Capacitor-less) or B-type (Output with Capacitor). FEATURES * * * * * * * * * * * * * 1W (8 ) mono channel speaker driver + stereo headphone driver Digital controlled volume (49 steps /+15dB ~ -90dB) 2 mono microphone inputs, 1 microphone output 2 stereo line input Input gain can be setting individually in each input port. Eliminate DC block capacitor in the headphone driver output (Only PT2301-A supported) Standby mode and Mute function Thermal shutdown protection circuit Energy Save function Very low "POP" noise during function changed. Wide operation voltage range: 2.7V ~ 5.5V Low Distortion: earphone output < 0.05%, speaker output< 0.04% Available in 24 Pin, space saving TSSOP Package APPLICATIONS * * * * * Electronic dictionary Translator PDA DSC (Digital Still Camera) GPS PT2301 V1.4 -1- April, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 1 Watt Audio Power Amplifier PT2301 PIN CONFIGURATION L1L L2L MIC1 VSS2 SCL SDA VCC MICOUT MIC2 L2R L1R REF 1 2 3 4 5 6 7 8 9 10 11 12 24 MIC_SENSE 23 HP_SENSE 22 LOUT 21 VP1 20 SP+ 19 VEE PT2301-A 18 SP17 VP2 16 ROUT 15 VSS1 14 /SHUTDOWN 13 MUTE L1L L2L MIC1 VSS2 SCL SDA VCC MICOUT MIC2 L2R L1R REF 1 2 3 4 5 6 7 8 9 10 11 12 24 MIC_SENSE 23 HP_SENSE 22 LOUT 21 VP1 20 SP+ 19 NC PT2301-B 18 SP17 VP2 16 ROUT 15 VSS1 14 /SHUTDOWN 13 MUTE PT2301 V1.4 -2- April, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 1 Watt Audio Power Amplifier PT2301 APPLICATION CIRCUIT I (PT2301-A) VCC 4.7K 4.7K External MIC IN Microphone Jack C8 1uF Internal MIC IN C2 1uF MIC OUT C7 1uF L1L C6 1uF L2L RL2 24K RL1 24K 1 2 3 4 SCL VCC SDA 5 6 7 100uF C4 1uF L2R C5 1uF L1R RR1 24K Cb 1uF RR2 24K 8 9 L1L L2L MIC1 VSS2 SCL SDA VCC MICOUT MIC2 MIC_SENSE HP_SENSE LOUT VP1 SP+ VEE 24 23 22 21 20 19 18 17 16 15 14 13 /SHUTDOWN MUTE 100uF VCC C3 100uF 8 ohm VCC Headphone Jack R4 10K C9 1uF R3 10K Cb1 10uF PT2301-A SPVP2 ROUT VSS1 10 L2R 11 L1R 12 REF /SHUTDOWN MUTE Notes 1. The (+) polarity of DC block capacitor installed in the I/O pin of the PT2301 should face towards the higher potential. 2. HP_SENSE (Pin 23) must be connected to Pin22 LOUT. 3. The gain setting resistors (R3R4RL1RL2RR1RR2 ) should keep as close as possible with the PT2301 chip to prevent pick up noises. 4. DO NOT CONNECT HEADPHONE COMMON (VEE) TO OTHER AUDIO EQUIPMENT! THIS MAY CAUSES IC DAMAGE. PT2301 V1.4 -3- April, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 1 Watt Audio Power Amplifier PT2301 APPLICATION CIRCUIT II (PT2301-B) VCC 4.7K 4.7K External MIC IN Microphone Jack C8 1uF Internal MIC IN C2 1uF MIC OUT C7 1uF L1L C6 1uF L2L RL2 24K RL1 24K 1 2 3 4 SCL VCC SDA 5 6 7 100uF C4 1uF L2R C5 1uF L1R RR1 24K Cb 1uF RR2 24K 8 9 L1L L2L MIC1 VSS2 SCL SDA VCC MICOUT MIC2 MIC_SENSE HP_SENSE LOUT VP1 SP+ NC 24 23 22 21 20 19 18 17 16 15 14 13 /SHUTDOWN MUTE 100uF VCC C3 100uF 8 ohm C12 300uF VCC Headphone Jack R4 10K R7 10K C11 300uF C9 1uF R3 10K VCC R8 10K R10 1K R9 1K Cb1 10uF PT2301-B SPVP2 ROUT VSS1 10 L2R 11 L1R 12 REF /SHUTDOWN MUTE Notes 1. The (+) polarity of DC block capacitor installed in the I/O pin of the PT2301 should face towards the higher potential. 2. The gain setting resistors (R3R4RL1RL2RR1RR2 ) should be kept as close as possible with the PT2301 chip to prevent pick up noises. PT2301 V1.4 -4- April, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 1 Watt Audio Power Amplifier PT2301 Package Type 24 Pins, TSSOP, 173mil 24 Pins, TSSOP, 173mil Top Code PT2301-A PT2301-B ORDER INFORMATION Valid Part Number PT2301-A PT2301-B PT2301 V1.4 -5- April, 2006 |
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