3544L-S08-R

3544_09 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD

3544 LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw 1 of 9 Copyright © 2009 Unisonic Technologies Co., Ltd QW-R107-040,C 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 fo r prevention of t he popping sound when power is turned on and off. To pr event damage from short circuits the UTC 3544 is equipped with thermal shutdown 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 Package Packing 3544L-D08-T 3544G-D08-T DIP-8 Tube 3544L-S08-R 3544G-S08-R SOP-8 Tape Reel

UNISONIC TECHNOLOGIES CO., LTD 2 of 10 www.unisonic.com.tw QW-R107-040,C „ PIN DESCRIPTIONS PIN NO. PIN NAME I/O PIN VOLTAGE INTERNAL EQUIVALENT CIRCUIT FUNCTION OUT1 OUT2 O O 2.1V 2.1V CC=5V) Vcc 10k Output pin 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) IN1 IN2 I I 2.1V 2.1V CC=5V) Vcc 180k BIAS Input pin 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 GND I

8 V CC I

UNISONIC TECHNOLOGIES CO., LTD 3 of 10 www.unisonic.com.tw QW-R107-040,C „ BLOCK DIAGRAM

UNISONIC TECHNOLOGIES CO., LTD 4 of 10 www.unisonic.com.tw QW-R107-040,C „ ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL RATINGS UNIT Applied Voltage V MAX 7.0 V 450 mW Power Dissipation Derate above 25°C PD 4.5 mW/°C Operating Temperature T OPR -25 ~ +75 °C Storage Temperature T STG -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 SYMBOL MIN TYP MAX UNIT Power Supply Voltage V CC 2.8 6.5 V „ ELECTRICAL CHARACTERISTICS (Ta=25°C, VCC=5.0V, RL=32Ω, VIN= -6dBV, f=1kHz) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Mute Pin Control Voltage V TM 0.3 0.7 1.6 V Quiescent Current I Q V IN=0Vrms 4 7 10 mA Voltage Gain Gv 4 6 8 dB Voltage Gain Difference Between Channels △Gv(DIFF) -0.5 0 0.5 dB Total Harmonic Distortion THD BW=20~20kHz 0.02 0.1 % Rated Output 1 Po1 R L=32Ω,THD<0.1% 25 31 mW Rated Output 2 Po2 R L=16Ω,THD<0.1% 50 62 mW Output Noise Voltage eN BW=20~20kHz,Rg=0 Ω -93 -85 dBV Channel Separation CS Rg=0 Ω 82 90 dB Mute Attenuation ATT Rg=0 Ω 70 80 dB Ripple Rejection RR f RR=100Hz, VRR= -20dBV 50 57 dB

UNISONIC TECHNOLOGIES CO., LTD 5 of 10 www.unisonic.com.tw QW-R107-040,C „ MEASUREMENT CIRCUIT 8 7 65 12 34 BIAS 90K 90K 6dB 6dB TSD MUTE OUT1 MUTE IN1 GND Vcc OUT2 BIAS IN2 V V SW5 VIN2 47μ + 330μ +SW7 V2AC 10μA SW8B IQ 12SW8A VRR Vcc 330μ +SW1 V1AC VTM SW3 VIN1 21μ „ MEASUREMENT CONDITIONS SW TABLE SIGNAL SW1 SW3 SW5 SW7 SW8A SW8B MONITOR CONDITIONS IQ 1 1 1 1 2 OFF I Q VTM GVC 1 2 2 1 2 ON V1AC,V2AC f=1kHz,VIN1/2=-6dBV, VTM=1.6V Gvc△ GVC1 – GVC2 THD 1 2 2 1 2 ON V1AC,V2AC fin=1kHz,VIN1/2= -6dBV, VTM=1.6V Po1 1 2 2 1 2 ON V1AC,V2AC fin=1kHz,VIN1/2= -6dBV, VTM=1.6V Po2 2 2 2 2 2 ON V1AC,V2AC fin=1kHz,VIN1/2= -6dBV, VTM=1.6V VNO 1 1 1 1 2 ON V1AC,V2AC CS 1 ON ON V1AC,V2AC V1AC,V2AC fin=1kHz,VIN2= -6dBV, VTM=1.6V fin=1kHz,VIN1= -6dBV, VTM=1.6V ATT 1 2 2 1 2 ON V1AC,V2AC fin=1kHz,VIN1/2= -6dBV, VTM=0.3VB RR 1 1 1 1 1 ON V1AC,V2AC V RR= -20dBV, fRR=100Hz

UNISONIC TECHNOLOGIES CO., LTD 6 of 10 www.unisonic.com.tw QW-R107-040,C „ CIRCUIT OPERATION Rising edge timing VMUTE OUT Vcc B C Play periodRising period Descending period A A and therefore possesses a time constant ,so be careful of the timing). A: MUTE period(use with MUTE=Low to prevent the popping noise when the power is turned on and off ). B: MUTE release time(used to prevent the popping noise at the release of MUTE with the external C 2 and R2 C: MUTE start time(also possesses a time constant like the MUTE release time).

UNISONIC TECHNOLOGIES CO., LTD 7 of 10 www.unisonic.com.tw QW-R107-040,C „ APPLICATION EXAMPLE 8 7 65 12 34 BIAS 90K 90K 6dB 6dB TSD MUTE OUT1 MUTE IN1 GND Vcc OUT2 BIAS IN2 VMUTE H:Active L:Mute 100k 1μ VIN1 VIN247μ+ 330μ Vcc C3 330μ „ EXPLANATION OF EXTERNAL COMPONENTS (1)Input coupling capacitor (C3 and C5) First determined by the low-band cut-off fr equency. Because the input impedance is 180k Ω for this IC, it can be determined by this formula C 3 ( C 5 ) = 1 / ( 2 π×180kΩ×f) But make sure taki ng the fluctuations, ambient temperature, etc into consideration. A multi-layered ceramic capacitor is recommended. (2)BIAS capacitor(C6) 4 7 μF when Vcc=5V, and 33μF when Vcc=3V. Before changing these values take the sufficient considerations.It is because the electrical characteristics will be adversely affected and popping noise may occur if the capacitance is lowered too much. (3)MUTE pin for anti-pop measures (R2 and C2) An impedance of 190k Ω must be possessed with respect to GND, so the MUTE mode may become unable to be released if R2 is increased too much. (4)Output coupling capacitor(C1 and C7) Also determined by the low-band cutoff frequency. Like the output load resistance value R L (a resistor Rx will be inserted ,assuming that for output protection or current limiting), it can be calculated by this formula (5)Input gain adjustment resistor(R3 and R4) External resistors R3 and R4 can perform input gain adjustment .The desired gain can be calculated by this formula G v = 6 + 2 0 l o g ( 9 0 k Ω/(90kΩ+R3))[dB]

UNISONIC TECHNOLOGIES CO., LTD 8 of 10 www.unisonic.com.tw QW-R107-040,C „ TYPICAL CHARACTERISTICS Quiescent Current vs. Power Supply Voltage Pin DC Current vs. Power Supply Voltage 0 2 468 1 0 Supply Voltage, Vcc (V) Quiescent Current, IQ (m Ta=25℃ RL=32Ω Supply Voltage, Vcc(V) Bias DC Voltage, V BIAS (V) 0 246 8 10 Output DC Voltage, V OUT (V) Ta=25℃ RL=32Ω MUTE: OFF MUTE: ON -10 -12 100 1k 100k 10k Frequency, F(Hz) Voltage Gain, Gv (dB) Voltage Gain vs. Frequency Ta=25℃ RL=32Ω Vcc=5V 0 0.4 -10 -20 -30 -40 -50 -60 -70 -80 -90 0.8 1.2 1.6 2 Mute Control Voltage, VTM (V) Output Voltage vs. Mute Control Voltage Output Voltage, V OUT (dBV) Ta=25℃ RL=32Ω Vcc=5V VIN=0dBV f=1kHz 0.1 0.01 0.001 -40 -30 -20 10-10 0 Output Voltage, VOUT (dBV) Total Harmonic Distortion vs. Output Voltage ( I ) Ta=25℃ RL=32Ω Vcc=5V f=10kHz f=1kHz f=100Hz 0.1 0.01 0.001 -40 -30 -20 10-10 0 Total Harmonic Distortion vs. Output Voltage ( II ) f=10kHz f=1kHz f=100Hz Ta=25℃ RL=32Ω Vcc=3V Output Voltage, VOUT (dBV)

UNISONIC TECHNOLOGIES CO., LTD 9 of 10 www.unisonic.com.tw QW-R107-040,C „ TYPICAL CHARACTERISTICS(Cont.)

UNISONIC TECHNOLOGIES CO., LTD 10 of 10 www.unisonic.com.tw QW-R107-040,C UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, oper ating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in lif e support appliances, devices or systems where malfunction of these products can be reasonably expe cted to result in personal injury. Reproduction in whole or in part is prohibited without the prior writ ten consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.