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 (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 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 1 24 MIC_S ENS E L2L 2 23 HP_S ENSE MIC1 3 22 LOUT VS S2 4 21 VP 1 SCL 5 20 SP + SDA 6 19 VE E(*) VCC 7 18 SP - MICOUT 8 17 VP 2 MIC2 9 16 ROUT L2R 10 15 VS S1 11 14 /SHUT DOWN REF 12 13 MUTE L1R PT23 07 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 4.7K 2 4 3 1 C9 R3 1 F 10K C8 R4 1 F 10K 10 F Cb1 MICROPHONE JACK INTERNAL MICIN C2 MICOUT 1 F C7 L1L RL1 24K 1 L1L MIC_SENSE 24 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 1 F RL2 24K C6 L2L 1 F VCC + 100 F C4 L2R RR2 24K 1 F C5 L1R 1 F RR1 24K + 1 F ROUT 16 10 L2R VSS1 15 11 L1R /SHUTDOWN 14 12 REF MUTE 13 Cb J1 2 4 3 1 VCC EARPHONE JACK STEREO 8 VCC + + 100 F C3 100 F /SHUTDOWN MUTE 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 PT2307 V1.2 Package Type 24 Pins, TSSOP, 173mil -4- Top Code PT2307 April, 2006