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| Datasheet File OCR Text: |
| NJM2149 LOW VOLTAGE AUDIO POWER AMPLIFIER s GENERAL DESCRPTION The NJM2149 is an audio power amplifier designed for telephone applications. No external coupling capacitors are required because of the differential outputs. The closed loop gain is adjusted by two external resistors, and a CD pin permit powering down with muting the input signal. The NJM2149 improves the tern noise reduction in switching Power Down mode and external high band noise reduction, compared with NJM2135. It is suitable for portable telephone , wireless telephone, button telephone, and other speaker amplifier applications. s FEATURES qOperating Voltage qOperating Current qSupply Current in Power Down Mode qOutput Power Exceeds250mW qGain Range qLoad Impedance qBipolar Technology qPackage Outline s PIN CONFIGURATION V+ 6 s PACKAGE OUTLENE NJM2149D NJM2149M NJM2149V NJM2149R NJM2149RB1 +2 - +6V 2.2mA typ., at V+=3V 0.1A typ V+=6V,RL=32 GVD=0-43dB,Voise Band RL=8-200 DIP8,DMP8,SSOP8,VSP8,TVSP8 BIAS -VIN 4 +VIN 3 1 CD #A 20k 5 VOUT1 PIN FUNCTION 1.CD 2.+VREF 3.+VIN 4.-VIN 5.VOUT1 6.V + 7.GND 8.VOUT2 50k +VREF 2 145k 50k 7 #B 20k 8 VOUT2 GND -1- NJM2149 s ABSOLUTE MAXMUM RANGE PARAMETER SYMBOL Supply Voltage V+ (Ta=25C) UNIT V RATINGS +7 (DIP8) (DMP8) (SSOP8) (VSP8/TVSP8) Power Dissipation PD 500 500 (note1) 360 (note1) 320 mW Operating Temperature Range Storage Temperature Range (note1)Mounted on PC Board Topr Tstg -40 to +85 -40 to +125 C C (V+=6.0V, 1pin=2V, Ta=25C unless otherwise specified) s ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Operating Voltage V+ 2.0 6.0 V + Operating Current ICC 2.2 3.5 mA V =3.0V, RL=, No Signal Operating Current ICCD 0.1 1.0 V+=3.0V, RL=, 1pin=0.8V, No Signal A at Power Down Mode Open Loop Gain A V1 84 90 dB Amp#A, f<100Hz Closed Loop Gain AV2 -0.35 0 +0.35 dB Amp#B, f=1kHz, RL=32 Output Power PO1 55 mW V+=3.0V, RL=16, THD10% (note2) PO2 250 mW V+=6.0V, RL=32, THD10% (note2) Total Harmonic THD1 0.5 1.0 % V+=6V, RL=32, PO=125mW, Distortion f =1kHz, GVD=34dB THD2 0.5 % V+3V, RL=8, PO=20mW, f=1kHz, GVD=12dB Power Supply SVR1 50 dB C1=, C2=0.01F, DC Rejection Ratio SVR2 12 dB C1=0.1F, C2=0, f=1kHz (V+=3.0V-6.0V) SVR3 47 dB C1=1.0F, C2=5.0F, f=1kHz Mute Attenuation MAT f =1kHz-20kHz, 1pin=0.8V 70 dB Output Voltage VO1 1.00 1.15 1.25 V V+=3.0V, RL=16 V+=6.0V 2.60 V VO2 (Rf=75k, DC) + + Output High Level VOH IOUT=-75mA, V =2.0-6.0V V -1.1 V Output Low Level VOL IOUT=75mA, V+=2.0-6.0V -30 0.21 V Output DC Offset -30 0 +30 mV VO Rf=75k, RL=32, 5pin-8pin Input Bias Current IB 4pin 0 -200 nA Equivalent Resistance R+IN 3pin 100 170 220 k RREF 2pin 18 26 40 k + CD Input Voltage H VCDH 1pin 2.0 V V CD Input Voltage L VCDL 1pin 0.0 0.8 V CD Input Resistance RCD V+=VCD=6.0V, 1pin 50 85 175 k (note2) NJM2149M,NJM2149V,NJM2149R,NJM2149RB1:Mounted on PC Board s CONTROL TERMINAL EXPLANATION CHIP DISABLE CONTROL(CD PIN) PARAMETER CONTROL SIGNAL CD OFF H(=VCDH) CD ON L(=VCDL) STATUS IC is active. IC is standby. (with Mute) -2- NJM2149 s APPLICATION CURCUIT V+=+6V 10F Rf 75k 6 BIAS Ci INPUT 0.1F 3.0k 3 C1 1.0F C2 2 4.7F 50k Ri 4 #A 1 CD(POWER DOWN) 5 SPEAKER 32 50k 145k #B 8 7 note:1.The CD terminal(1pin) should connect High level(>2.0V), when NJM2149 is active. The standby mode, when the CD terminal is Low level(<0.8V). 2.To add the C1 and C2 capacitor, the power-supply-rejection-ratio will be improved. When C1 is large value, C2 will be unnecessary. 3.The power-up time depend on the C1 and C2 capacitor. 4.The input current of CD terminal is as shown below figure. V + 72k 1pin 80k GND 5.No connect oscillation-protect RC required. To connect oscillation-protect RC, if the NJM2149 oscillate with PC board/stray capacitor/long speaker wire and others condition. -3- NJM2149 s TYPCAL CHARACTERISTICS Operating Current vs. Operating Voltage (VCD=V+,Ta=25C) 4 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 V [V] + Standby Current vs. Operating Voltage (VCD=GND,Ta=25C) 2 1.5 1 0.5 0 4 5 6 0 1 2 3 + V [V] 4 5 6 CD Sink Current vs. CD Voltage (V+=6V,Ta=25C) 200 1000 Power Dissipation vs. Output Power (R L=8,Ta=25C) 3V 150 800 6V 600 100 400 50 200 0 0 1 2 3 V [V] CD 0 4 5 6 0 100 200 300 Po[mW] 400 500 Power Dissipation vs. Output Power (R L=16,Ta=25C) 1000 1000 Power Dissipation vs. Output Power (R L=32,Ta=25C) 800 3V 800 3V 6V 600 6V 600 400 400 200 200 0 0 100 200 300 Po[mW] 400 500 0 0 100 200 300 Po[mW] 400 500 -4- NJM2149 s TYPCAL CHARACTERISTICS Total Harmonic Distortion vs. Output Power (f=1kHz,GVD=34dB,Ta=25C) 10 V+=3V,RL=8OHM V+=3V,RL=16OHM V+=6V,RL=16OHM V+=6V,RL=32OHM Total Harmonic Distortion vs. Output Power (f=3kHz,GVD=34dB,Ta=25C) 10 V+=3V,RL=8OHM V+=3V,RL=16OHM V+=6V,RL=16OHM V+=6V,RL=32OHM 8 8 6 6 4 4 2 2 0 0 0.1 0.2 Po[W] 0.3 0.4 0.5 0 0 0.1 0.2 Po[W] 0.3 0.4 0.5 Total Harmonic Distortion vs. Output Power (f=1.3kHz,GVD=12dB,Ta=25C) 10 V+=3V,RL=8OHM V+=3V,RL=16OHM V+=6V,RL=16OHM V+=6V,RL=32OHM 8 6 4 2 0 0 0.1 0.2 Po[W] 0.3 0.4 0.5 Maximum Output Swing vs. Load Current (V+ Side,V+=6V,Ta=25C) 2000 1800 1600 1400 Maximum Output Swing vs. Load Current (GND Side,V+=6V,Ta=25C) 2000 1500 1000 1200 1000 800 600 0 50 100 150 I [mA] L 500 0 200 250 300 0 50 100 150 I [mA] L 200 250 300 -5- NJM2149 s TYPCAL CHARACTERISTICS Supply Voltage Rejection Ratio vs. Frequency (V+=6V,GVD=34dB,C2=0F,Ta=25C) 70 60 50 40 30 20 10 0 200 1000 f[Hz] C1=5uF C1=1uF C1=0.1uF Supply Voltage Rejection Ratio vs. Frequency (V+=6V,GVD=34dB,C2=1F,Ta=25C) 70 60 50 40 30 20 10 C1=5uF C1=1uF C1=0.1uF C1=0uF 10 4 0 200 1000 f[Hz] 10 4 Supply Voltage Rejection Ratio vs. Frequency (V+=6V,GVD=34dB,C2=5F,Ta=25C) 70 60 50 40 30 20 10 0 200 1000 f[Hz] 4 C1=1uF C1=0.1uF C1=0uF Supply Voltage Rejection Ratio vs. Frequency (V+=6V,GVD=34dB,C2=10F,Ta=25C) 70 60 50 40 30 20 10 0 200 1000 f[Hz] 4 C1=1uF C1=0.1uF C1=0uF 10 10 Operating Current vs. Temperature (V+=6V) 4 3.5 3 2.5 2 1.5 Icc3[mA] Standby Current vs. Temperature (V+=6V) 0.0001 10 10 10 10 10 10 -5 -6 -7 -8 1 -9 0.5 0 -100 -50 0 Ta[ C] o -10 50 100 150 -40 -20 0 20 o Ta[ C] 40 60 80 -6- NJM2149 s TYPCAL CHARACTERISTICS Output Offset Voltage vs. Temperature (V+=6V) 10 500 Output Power vs. Temperature (V+=6V) 5 400 300 0 200 Po3[mW] Po6[mW] -5 100 -10 -100 -50 0 Ta[ C] o 0 50 100 150 -40 -20 0 20 o Ta[ C] 40 60 80 MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right -7- |
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