LOW VOLTAGE AUDIO POWER AMPLIFIER

Transcription

1 LOW VOLTAGE AUDIO POWER AMPLIFIER NJM19 GENERAL DESCRPTION The NJM19 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 NJM19 improves the tern noise reduction in switching Power Down mode and external high band noise reduction, compared with NJM15. It is suitable for portable telephone, wireless telephone, button telephone, and other speaker amplifier applications. PACKAGE OUTLENE NJM19D NJM19V NJM19M NJM19R FEATURES NJM19RB1 Operating Voltage + - +V Operating Current.mA typ., at V + =V Supply Current in Power Down Mode.1µA typ Output Power Exceeds5mW V + =V,R L =Ω Gain Range GVD=-dB,Voise Band Load Impedance R L =-Ω Bipolar Technology Package Outline DIP,DMP,SSOP,VSP,TVSP PIN CONFIGURATION -V IN +V IN V + BIAS 1 #A 5 kω CD V OUT 1 PIN FUNCTION 1.CD.+V REF.+V IN.-V IN 5.V OUT 1.V + 7.GND.V OUT +V REF 5kΩ 15kΩ #B kω V OUT 5kΩ 7 GND -1 -

2 NJM19 ABSOLUTE MAXMUM RANGE (Ta=5 C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V + +7 V Power Dissipation P D (DIP) 5 (DMP) 5 (note1) (SSOP) (note1) (VSP/TVSP) mw Operating Temperature Range Topr - to +5 C Storage Temperature Range Tstg - to +15 C (note1)mounted on PC Board ELECTRICAL CHARACTERISTICS (V + =.V, 1pin=V, Ta=5 C unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Operating Voltage V V Operating Current I CC V + =.V, R L =, No Signal -..5 ma Operating Current I CCD V + =.V, R L =, 1pin=.V, No Signal µa at Power Down Mode Open Loop Gain A V 1 Amp#A, f<1hz 9 - db Closed Loop Gain A V Amp#B, f=1khz, R L =Ω db Output Power P O 1 V + =.V, R L =1Ω, THD 1% (note) mw P O V + =.V, R L =Ω, THD 1% (note) mw Total Harmonic THD1 V + =V, R L =Ω, P O =15mW, % Distortion f =1kHz, G VD =db THD V + V, R L =Ω, P O =mw, % f=1khz, G VD =1dB Power Supply SVR1 C1=, C=.1µF, DC db Rejection Ratio SVR C1=.1µF, C=, f=1khz db (V + =.V-.V) SVR C1=1.µF, C=5.µF, f=1khz db Mute Attenuation MAT f =1kHz-kHz, 1pin=.V db Output Voltage V O 1 V + =.V, R L =1Ω V (R f =75kΩ, DC) V O V + =.V -. - V Output High Level V OH I OUT =-75mA, V + =.-.V - V V Output Low Level V OL I OUT =75mA, V + =.-.V V Output DC Offset V O R f =75kΩ, R L =Ω, 5pin-pin - + mv Input Bias Current I B pin - - na Equivalent Resistance R +IN pin 1 17 kω R REF pin 1 kω CD Input Voltage H V CDH 1pin. - V + V CD Input Voltage L V CDL 1pin. -. V CD Input Resistance R CD V + =V CD =.V, 1pin kω (note) NJM19M,NJM19V,NJM19R,NJM19RB1:Mounted on PC Board CONTROL TERMINAL EXPLANATION CHIP DISABLE CONTROL(CD PIN) PARAMETER CONTROL SIGNAL STATUS CD OFF H(=V CDH ) IC is active. CD ON L(=V CDL ) IC is standby. (with Mute) - -

3 NJM19 APPLICATION CURCUIT V + =+V 1µF Rf 75kΩ INPUT Ci Ri.1µF.kΩ #A BIAS 1 5 CD(POWER DOWN) C 1 1.µF 5kΩ SPEAKER Ω C.7µF 15kΩ 5kΩ #B 7 note:1.the CD terminal(1pin) should connect High level(>.v), when NJM19 is active. The standby mode, when the CD terminal is Low level(<.v)..to add the C1 and C capacitor, the power-supply-rejection-ratio will be improved. When C1 is large value, C will be unnecessary..the power-up time depend on the C1 and C capacitor..the input current of CD terminal is as shown below figure. V + 1pin 7kΩ kω GND 5.No connect oscillation-protect RC required. To connect oscillation-protect RC, if the NJM19 oscillate with PC board/stray capacitor/long speaker wire and others condition. - -

4 NJM19 Operating Current vs. Operating Voltage Standby Current vs. Operating Voltage (V CD =V +,Ta=5 C) (V CD =GND,Ta=5 C) V + [V] 1 5 V + [V] CD Sink Current vs. CD Voltage Power Dissipation vs. Output Power (V + =V,Ta=5 C) (R L =Ω,Ta=5 C) 1 15 V V V [V] CD 1 5 Po[mW] 1 Power Dissipation vs. Output Power Power Dissipation vs. Output Power (R L =1Ω,Ta=5 C) (R L =Ω,Ta=5 C) 1 V V V V 1 5 Po[mW] 1 5 Po[mW] - -

5 NJM19 Total Harmonic Distortion vs. Output Power (f=1khz,g VD =db,ta=5 C) 1 Total Harmonic Distortion vs. Output Power (f=khz,g VD =db,ta=5 C) 1 V+=V,RL=OHM V+=V,RL=1OHM V+=V,RL=1OHM V+=V,RL=OHM V+=V,RL=OHM V+=V,RL=1OHM V+=V,RL=1OHM V+=V,RL=OHM Po[W] Po[W] Total Harmonic Distortion vs. Output Power (f=1.khz,g VD =1dB,Ta=5 C) 1 V+=V,RL=OHM V+=V,RL=1OHM V+=V,RL=1OHM V+=V,RL=OHM Po[W] Maximum Output Swing vs. Load Current Maximum Output Swing vs. Load Current (V + Side,V + =V,Ta=5 C) (GND Side,V + =V,Ta=5 C) I [ma] L I [ma] L - 5 -

6 NJM19 Supply Voltage Rejection Ratio vs. Frequency Supply Voltage Rejection Ratio vs. Frequency (V + =V,G VD =db,c=µf,ta=5 C) (V + =V,G VD =db,c=1µf,ta=5 C) C1=5uF C1=.1uF 5 C1=5uF C1=.1uF C1=uF Supply Voltage Rejection Ratio vs. Frequency Supply Voltage Rejection Ratio vs. Frequency (V + =V,G VD =db,c=5µf,ta=5 C) (V + =V,G VD =db,c=1µf,ta=5 C) 7 5 C1=.1uF C1=uF 7 5 C1=.1uF C1=uF Operating Current vs. Temperature Standby Current vs. Temperature (V + =V) (V + =V) Icc[mA]

7 NJM19 Output Offset Voltage vs. Temperature Output Power vs. Temperature (V + =V) (V + =V) Po[mW] Po[mW] 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 -