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 Ω) 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 PT2301 V1.4 L1L 1 24 MIC_SENSE L2L 2 23 HP_SENSE MIC1 3 22 LOUT VSS2 4 21 VP1 SCL 5 20 SP+ SDA 6 19 VEE VCC 7 MICOUT 8 17 VP2 MIC2 9 16 ROUT L2R 10 15 VSS1 L1R 11 14 /SHUTDOWN REF 12 13 MUTE L1L 1 24 MIC_SENSE L2L 2 23 HP_SENSE MIC1 3 22 LOUT VSS2 4 21 VP1 SCL 5 20 SP+ SDA 6 19 NC VCC 7 MICOUT 8 17 VP2 MIC2 9 16 ROUT L2R 10 15 VSS1 L1R 11 14 /SHUTDOWN REF 12 13 MUTE PT2301-A PT2301-B -2- 18 SP- 18 SP- 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 C9 1uF R3 10K C8 1uF R4 10K Cb1 10uF Microphone Jack Internal MIC IN C2 1uF MIC OUT C7 1uF RL1 24K 1 L1L MIC_SENSE 2 L2L HP_SENSE 23 3 MIC1 LOUT 22 4 VSS2 VP1 21 SCL 5 SCL SP+ 20 SDA 6 SDA VEE 19 7 VCC SP- 18 8 MICOUT VP2 17 9 MIC2 ROUT 16 10 L2R VSS1 15 11 L1R /SHUTDOWN 14 /SHUTDOWN 12 REF MUTE 13 MUTE L1L C6 1uF L2L RL2 24K VCC 100uF C4 1uF RR2 24K L2R C5 1uF L1R RR1 24K PT2301-A 24 VCC Headphone Jack 8 ohm VCC 100uF C3 100uF Cb 1uF 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 (R3、R4、RL1、RL2、RR1、RR2 ) 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 C9 1uF VCC R3 10K R8 10K Microphone Jack C8 1uF R10 1K R4 10K Internal MIC IN R7 10K C2 1uF MIC OUT C7 1uF 1 L1L MIC_SENSE 2 L2L HP_SENSE 23 3 MIC1 LOUT 22 4 VSS2 VP1 21 SCL 5 SCL SP+ 20 SDA 6 SDA NC 19 7 VCC SP- 18 8 MICOUT VP2 17 9 MIC2 ROUT 16 10 L2R VSS1 15 11 L1R /SHUTDOWN 14 /SHUTDOWN 12 REF MUTE 13 MUTE C6 1uF L2L RL2 24K VCC 100uF C4 1uF R9 1K C11 300uF RL1 24K L1L RR2 24K L2R C5 1uF L1R Cb1 10uF RR1 24K PT2301-B 24 C12 300uF VCC Headphone Jack 8 ohm VCC 100uF C3 100uF Cb 1uF 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 (R3、R4、RL1、RL2、RR1、RR2 ) 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 ORDER INFORMATION Valid Part Number PT2301-A PT2301-B PT2301 V1.4 Package Type 24 Pins, TSSOP, 173mil 24 Pins, TSSOP, 173mil -5- Top Code PT2301-A PT2301-B April, 2006