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| MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL Description The GMA7496L is a stereo 2W+2W class AB power amplifier assembled in the @DIP-20 package, specially designed for high quality sound, TV and Monitor applications. Features of the GMA7496L include linear volume control , Standby and Mute functions. Features 2W+2W Output Power RL = 8W @THD = 10% VCC = 14V Standby and Mute Functions Low Turn- on Turn-off POP Noise Linear Volume Control DC Coupled With Power Op- amp. No Boucherot Cell No St-by RC Input Network Single Supply Ranging up to 15V Short Circuit Protection Thermal Overload Protection Internally Fixed Gain Soft Clipping Variable Output After Volume Control Circuit DIP- 20 Package TYPICAL APPLICATION CIRCUITS Varout_R GND 7 1,2,3,13, 18,19,20 9 470nF 30K Volume VS 15,16 OP- Amp + - INR 14 1000F OUTR S1 ST-BY 11 STBY MUTE/STBY PROTECTIONS Volume INL 470nF SVR 10 470F Volume 6 5 Varout_L +5V 4 30K + OP- Amp 60K 17 OUTL 1000F 10K 12 MUTE 1F S2 MUTE +5V S_GND +5V 100nF 300K www.gammamicro.com GMA7496L V0.1 1 MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL MARKING INFORMATION & PIN CONFIGURATIONS (TOP VIEW) DIP-20 VS OUTL GND GND GND 20 19 18 17 16 15 14 13 12 11 VS OUTR GND MUTE STBY GMA7496L AYWW 1 2 3 4 5 6 7 8 9 10 GND GND GND INL VAROUT_L A : Assembly Location Y : Year W W : weekly SVR INR N.C. VAROUT_R VOLUME ORDERING INFORMATION ORDERING NUMBER GMA7496LD20 PACKAGE DIP-20 SHIPPING 18 Units/ Tube * For detail Ordering Number identification, please see last page. GMA7496L 2 MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL ABSOLUTE MAXIMUM RATINGS Parameter DC Supply Voltage Maximum Input Voltage Total Power Dissipation (Tcase= 60C) Ambient Operating Temperature Storage and Junction Temperature Volume CTRL DC Voltage Symbol VS VIN Ptot Tamp Tstg, Tj V6 Value 26 8 6 0 to 70 -40 to 150 7 Unit V Vpp W C C V THERMAL DATA Parameter Thermal Resistance Junction-pins (max.) Thermal Resistance Junction-ambient (max.) (*) Mounted on PCB with no hestsink Symbol Rth j-pins Rth j-amb(*) Value 15 50 Unit C/ W C/W GMA7496L 3 MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL ELECTRICAL CHARACTERISTICS ( Refer to the test circuit VS = 14V; RL = 8W, Rg = 50 , Tamb = 25C). Parameter Supply Voltage Range Total Quiescent Current Output DC Offset Referred to SVR Potential Quiescent Output Voltage Output Power Total Harmonic Distortion Output Peak Current Input Signal Closed Loop Gain Monitor Out Gain Attenuation at Minimum Volume Frequency Response SYMBOL VS IQ DCVOS VO PO THD Ipeak VIN GV GVLine Amin VOL BW TEST CONDITIONS Min 10 Typ Max 18 Unit V mA mV V W W 25 No Input Signal 200 7 THD= 10%; RL= 8W THD= 1%; RL= 8W GV= 30dB; PO=1W; f= 1kHz (Internally Limited) 0.7 0.9 1.6 2 1.3 50 0.4 % A 2.8 Vol Ctrl > 4.5V Vol Ctrl > 4.5V; Zload > 30KW Vol Ctrl < 0.5V 28.5 -1.5 80 0.6 f= 20Hz to 22kHz Play, max volume 500 100 60 5 22.5 8 30 30 2 f= 1kHz; max volume CSVR= 470F; VRIP= 1Vrms f= 1kHz; max attenuation CSVR= 470F; VRIP= 1Vrms 35 55 39 65 150 160 100 800 250 150 30 0 31.5 1.5 Vrms dB dB dB MHz V V V V/ s KW W KW dB dB C C Total Output Noise eN f= 20Hz to 22kHz Play, max attenuation f= 20Hz to 22kHz Mute Slew Rate Input Resistance Variable Output Resistance Variable Output Load SR Ri Rvar out Rload var out Supply Voltage Rejection SVR Thermal Muting Thermal Shut-Down TM TS MUTE STAND- BY & INPUT SELECTION FUNCTIONS Stand- by ON Threshold Stand- by OFF Threshold Mute ON Threshold Mute OFF Threshold Quiescent Current @ Stand- by Mute Attenuation VST ON VST OFF VM ON VM OFF IQST-BY AMUTE IstbyBIAS Stand by on VST-BY= 5V VMUTE= 5V Play or Mute ImuteBIAS Mute Play -20 50 0.6 65 80 -5 1 0.2 5 2 3.5 1.5 1 3.5 1.5 V V V V mA dB A A A A GMA7496L 4 Stand- by Bias Current Mute Attenuation Mute Bias Current MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL APPLICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure 1A. Different values can be used, the following table reference for the designer. Component Suggestion Value Purpose R1 R2 P1 C1 C2 C3 C4 C5 C6 C7 C8 C9 300k 10k 50k 1000F 470nF 470nF 470F 100nF 1000F 1F 1000F 100nF Volume control Circuit Mute time control Volume control Circuit Supply voltage bypass Input DC decoupling Input DC decoupling Ripple rejection Volume control time costant Larger than Suggestion Larger volume regulation time Larger mute on/ off time Smaller than Suggestion Smaller volume regulation time Smaller mute on/ off time Danger of oscillation Lower low frequency cutoff Lower low frequency cutoff Better SVR Larger volume regulation time Higher low frequency cutoff Higher low frequency cutoff Worse SVR Smaller volume regulation time Higher low frequency cutoff Smaller mute on/ off time Higher low frequency cutoff Danger of oscillation Output DC decoupling Lower Low frequency cutoff Mute time costant Larger mute on/ off time Output DC decoupling Lower low frequency futoff Supply voltage bypass APPLICATION CIRCUIT +VS C1 1000F Varout_R PW_GND 1,2,3,13, 18,19,20 INR C2 470nF 9 30K 7 Volume VS 15,16 OP-Amp + - C9 0.1F 14 C8 1000F PW_GND OUTR S1 STBY 11 MUTE/STBY PROTECTIONS C3 470nF INL Volume 4 30K SVR 10 C4 470F 6 Volume C5 100nF 5 Varout_L R1 300K VOL P1 50K LOG + - +5V 12 60K 17 C7 1F R2 10K S_GND S2 MUTE OUTL PW_GND OP- Amp C6 1000F +5V TP1 GMA7496L 5 +5V MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL Turn ON/OFF Sequences (for optimizing the POP performances) (A) USING MUTE AND STAND-BY FUNCTIONS VS (V) ST-BY pin#11 (V) 5 VSVR pin#10(V) 2.5V MUTE pin#12 (V) 5 INPUT (mV) VOUT (V) OFF IQ (mA) MUTE STBY PLAY OFF MUTE STBY (B) USING ONLY THE MUTE FUNCTION To simplify the application, the stand-by pin can be connected directly to Ground. During the ON/OFF transitions is recommend to respect the following conditions. - At the turn-on, the transition mute - play must be made when the SVR pin is higher than 2.5V - At the turn-off, the GMA7496L must be brought to mute from the play condition when the SVR pin is higher than 2.5V. GMA7496L 6 MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL TYPICAL PERFORMANCE CHARACTERISTICS Iq (mA) 34 32 30 28 26 24 22 20 18 16 10 11 12 13 14 15 16 Supply Voltage (V) 17 18 Vodc (V) 10 9.5 9.0 8.5 VI= 0 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 10 11 VI= 0 12 13 14 15 16 Supply Voltage (V) 17 18 Figure 1. Quiescent current vs. Supply voltage Vodc- Vsvr (V) 300 280 Figure 2. Output DC Voltage vs. Supply Voltage Output Power (W) 4.0 3.5 260 240 220 200 180 1.5 160 140 120 100 10 11 12 13 14 15 16 Supply Voltage (V) 17 18 1.0 0.5 0 3.0 RI= 8W F= 1kHz VI= 0 2.5 2.0 THD= 10% THD= 1% 10 11 12 13 14 15 16 Supply Voltage (V) 17 18 Figure 3. Output DC Offset vs. Supply Voltage Figure 4. Output DC Voltage vs. Supply Voltage Distortion (%) 10 Colosed Loop (dB) 32 31 30 29 VS= 12V RI= 8W 1.0 27 26 25 0.1 F= 1kHz 24 23 22 21 RI= 8W Pout= 0.5W Cin= 470nF Cout= 1000F Csvr= 470F 0.01 20 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Output Power (V) 0.02 0.2 2.0 20 Frequency (kHz) Figure 5. Output DC Offset vs. Supply Voltage Figure 6. Closed Loop gain vs. Frequency GMA7496L 7 F= 15kHz 28 MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Stand- by Attenuation (dB) 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 RI= 8W -130 0 dB @ Pout= 1W -140 0 0.5 1 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Vpin#11(V) Mute Attenuation (dB) 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 RI= 8W 0 dB @ Pout= 1W 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 Vpin#12(V) Figure 7. St- By Attenuation vs. Vpin 11 Figure 8. Mute Attenuation vs. Vpin 12 PIN DESCRIPTION VS VS VS + 30K 20K SVR 20K 6K 1K 30K 6K 1K OUT L GMA7496L 100A 8 + OUT R PIN: SVR MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL PIN DESCRIPTION (Continued) PINS: INL, INR VS PINS: VAROUT- L, VAROUT-R VS 6K INn 500A VAROUT-L 30K SVR PIN: VOLUME VS 10A VOL PIN: MUTE VS MUTE 200 10K 50A PIN: PW- GND, S- GND PIN: OUT R, OUT L VS GND VS OUT VS 10A 200 STBY 65K GMA7496L 9 PIN: STBY MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL DIP-20 PACKAGE OUTLINE DIMENSIONS 1.022 - 1.045 25.950 - 26.550 7.620 TYP 0.300 TYP 0.244 - 0.260 6.200 - 6.600 0.008 - 0.014 0.204 - 0.360 0.323 - 0.370 8.200 - 9.400 0.146 - 0.170 3.710 - 4.310 0.118 - 0.142 3.000 - 3.600 0.060 TYP 1.524 TYP 0.014 - 0.022 0.360 - 0.560 2.540 TYP 0.100 TYP 0.126 - 0.142 3.200 - 3.600 0.020 MIN 0.510 MIN Inches ( mm ) ORDERING NUMBER GMA 7496L D20 T Gamma Micro. Shipping T: Tube Circuit Type GMA7496L 18 ea / Tube , 40 Tube / Box Package D20: DIP-20 10 MICROELECTRONICS A A Audio Amp. GMA7496L 2W+2W AMPLIFIER W/ DC VOLUME CONTROL GMA7496L 11 |
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