3544L-D08-T

UNISONIC TECHNOLOGIES CO., LTD 3544 HEADPHONE AMPLIFIER FOR CD-ROMS DESCRIPTION As a dual headphone amplifier the UTC 3544 is digital-source. The UTC 3544 has a steady gain of 6dB and so it is unnecessary for external gain setting. The UTC 3544 has internal mute function so that it is greatly simplified for prevention of the popping sound when power is turned on and off. To prevent damage from short circuits the UTC 3544 is equipped with thermal shutdown circuit. LINEAR INTEGRATED CIRCUIT FEATURES * Internal mute function to prevent popping sounds when *the power is turned on and off. * Built-in thermal shutdown circuit (150°C) to prevent *damage to the IC if a short circuit occurs. ORDERING INFORMATION Ordering Number Lead Free Halogen Free 3544L-D08-T 3544G-D08-T 3544L-S08-R 3544G-S08-R Package DIP-8 SOP-8 Packing Tube Tape Reel www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd 1 of 9 QW-R107-040,C 3544 PIN DESCRIPTIONS PIN NO. PIN NAME I/O PIN VOLTAGE LINEAR INTEGRATED CIRCUIT INTERNAL EQUIVALENT CIRCUIT Vcc FUNCTION 1 OUT1 O 2.1V 1 Output pin 10k 7 OUT2 O 2.1V (VCC=5V) 7 2 MUTE I 0.1V (When open) Mute control pin (set to low for prevention of popping noise when power is turned on and off). Operating: High Muting: Low(open) Vcc 3 IN1 I 2.1V 3 Input pin 180k BIAS 5 IN2 I 2.1V (VCC=5V) 5 6 BIAS I/O 2.1V (VCC=5V) Bias pin (the external 47μF capacitor also serves as the anti-pop time constant, therefore make the proper considerations be changing it). 4 8 GND VCC I I UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R107-040,C 3544 BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 10 QW-R107-040,C 3544 ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER Applied Voltage Power Dissipation Derate above 25°C LINEAR INTEGRATED CIRCUIT SYMBOL VMAX PD RATINGS 7.0 450 UNIT V mW 4.5 mW/°C Operating Temperature TOPR -25 ~ +75 °C Storage Temperature TSTG -55 ~ +125 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. RECOMMENDED OPERATING CONDITIONS (Ta=25°C) PARAMETER Power Supply Voltage SYMBOL VCC MIN 2.8 TYP MAX 6.5 UNIT V ELECTRICAL CHARACTERISTICS (Ta=25°C, VCC=5.0V, RL=32Ω, VIN= -6dBV, f=1kHz) PARAMETER Mute Pin Control Voltage Quiescent Current Voltage Gain Voltage Gain Difference Between Channels Total Harmonic Distortion Rated Output 1 Rated Output 2 Output Noise Voltage Channel Separation Mute Attenuation Ripple Rejection SYMBOL VTM IQ Gv △Gv(DIFF) THD Po1 Po2 eN CS ATT RR CONDITIONS VIN=0Vrms MIN 0.3 4 4 -0.5 25 50 82 70 50 TYP 0.7 7 6 0 0.02 31 62 -93 90 80 57 MAX 1.6 10 8 0.5 0.1 UNIT V mA dB dB % mW mW dBV dB dB dB BW=20~20kHz RL=32Ω,THD