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