PT2338 150mW Stereo Audio Power Amplifier DESCRIPTION FEATURES The PT2338 is a stereo power amplifier designed for the audio equipment; it is possible to delivery up to 150mW power to the 16Ω loads. Overall voltage gain is determine by the external resistors, for some application needs higher common mode reject performance to canceling common mode noises, the input port of the PT2338 is configuration as differential input. Very low quiescent current and low voltage operation capability let it become a best choice for the portable audio application. • • • • • • • • • CMOS processing Stereo differential inputs Wide operation range: from 2.5V to 5.5V Driving capability up to 16Ω headphone Low quiescent current:1.5mA POP noise free circuitry Thermal and Short-Circuit protection Low Harmonic distortion and low residual noise Available in 10 Pins, MSOP small outline package APPLICATIONS • • • • • • • Portable media player Wireless headset Mobile phone LCD TV Mini compo PC audio Other audio applications BLOCK DIAGRAM Bias C ontrol 1 9 2 3 4 10 A MP 1 350K 8 A MP 2 7 350K 5 6 Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2338 APPLICATION CIRCUIT DIAGRAM SINGLE ENDED CONFIGURATION G R L LCH 2 1 3 RCH Co1 220uF VO1 Bias C ontrol 1 Ci RIN R1D 100K R1C IP1 R1A 0.47uF 100K 3 R1B 100K Cbypass BYPA SS 4 GND 1uF VDD VDD Cs 10 1uF VO2 2 0.47uF 100K Ci IN1 Co2 220uF 9 R2D 100K IN2 A MP 1 8 350K A MP 2 350K IP2 7 R2B 100K SD 5 R2C Ci 100K 0.47uF R2A Ci 100K 0.47uF LIN 6 VDD Hi=Shutdown On Note : 1. Single-ended inverted amplifier configuration can get the better performance of the PSRR. 2. Increase the capacitance of the Cbypass can improve the PSRR performance, but it also extends power on muting period. DIFFERENTIAL INPUT CONFIGURATION G R L 2 1 3 LCH RCH Co1 220uF VO1 Bias C ontrol 1 Ci R1C 0.47uF 100K Ci R1A RIN- RIN+ 0.47uF R1D 100K IN1 3 100K R1B 100K Cbypass 1uF BYPA SS 4 GND 5 10 VDD Cs 1uF VO 2 2 IP1 VDD Co2 220uF 9 IN2 A MP 1 350K 350K R2D 100K 8 A MP 2 IP2 7 SD R2B 100K R2C Ci 100K 0.47uF R2A Ci 100K 0.47uF LIN- LIN+ 6 VDD Hi=Shutdown O n V1.0 2 PT2338 ORDER INFORMATION Valid Part Number PT2338-MS Package Type 10 pins, MSOP Top Code PT2338-MS PIN CONFIGURATION PIN DESCRIPTION Pin Name VO1 IN1 IP1 BYPASS GND SD IP2 IN2 VO2 VDD V1.0 I/O O I I I I I I O - Description Audio output for channel 1 Negative input for channel 1 Positive input for channel 1 Internal mid-supply voltage bypassing Ground Put the device in low quiescent current mode when held high Positive input for channel 2 Negative input for channel 2 Audio output for channel Supply voltage terminal Pin No. 1 2 3 4 5 6 7 8 9 10 3