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GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Description
The GMA7496L is a stereo 2W+2W class AB power amplifier assembled in the Powerdip 14+3+3 package, specially designed for high quality sound, TV and monitor applications. Features of the GMA7496L include linear volume control, stand-by and mute functions.
Features
2W+2W Output Power RL = 8 @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 & SOP- 20 Package
Typical Application Circuit
Varout_R GND INR 470nF 1, 2, 3, 13, 18, 19, 20 9 30K 7 Volume
VS 15, 16
OP-Amp
14 OUTR
1000F
S1 11 STBY MUTE/STBY PROTECTIONS 470nF INL Volume 4 30K SVR 10 6 Volume 5 Varout_L 300K OP-Amp 60K 12 MUTE 10K 1F 17 OUTL 1000F S2
ST-BY
+5V GND
MUTE
+5V
+5V
www.gammamicro.com.tw
GMA7496LV1.00
1
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Marking Information and Pin Configurations (Top View)
GND 1. GND 2. GND 3. INL 4. 20. GND GND 1 19. GND 18. GND 17. OUTL GND 2. GND 3. INL 4. VAROUT_L 5. 20. GND 19. GND 18. GND 17. OUTL 16. VS 15. VS 14. OUTR 13. GND 12. MUTE 11. STBY
GMA7496L AYWW
GMA7496L AYWW
VAROUT_L 5. VOLUME 6. VAROUT_R 7. NC 8. INR 9. SVR 10.
16. VS 15. VS 14. OUTR 13. GND 12. MUTE 11. STBY
VOLUME 6. VAROUT_R 7. NC 8. INR 9. SVR 10.
A: Assembly/Test Site Code Y: Year WW: Week
Ordering Information
Ordering Number GMA7496LD20T GMA7496LS20T Package DIP-20 SO-20 Shipping 22 Units/Tube 38 Units/Tube
GMA7496LV1.00
2
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Absolute Maximum Ratings
PARAMETER DC Supply Voltage Maximum Input Voltage Total Power Dissipation (TCASE = 60C) Operating Ambient Temperature Storage Temperature Volume CTRL DC Voltage ESD Capability, Machine Mode SYMBOL VS VIN Ptot TA Tstg V6 VESD RATINGS 26 8 6 0 to 70 - 40 to 150 7 200 UNITS V VPP W J J V V
Thermal Data
PARAMETER Thermal Resistance Junction-pins (max) Thermal Resistance Junction-Ambient (max)
(*) Mounted on PCB with no heatsink.
SYMBOL Rth i-pins Rth i-amb(*)
RATINGS 15 50
UNITS C/W C/W
GMA7496LV1.00
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GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Electrical Characteristics Refer to the test circuit: VS = 14V, RL = 8, Rg = 50 , TA = 25C
Parameter
Supply Voltage 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 Condition
Min
10
Typ
Max
18
Unit
V mA mV
25 No Input Signal 6.0 THD = 10%, RL = 8 THD = 1%, RL = 8 GV = 30dB, PO = 1W, f = 1kHz (Internally Limited) 0.7 0.9 1.6 200 6.7 2 1.3
50
8.0
V W
0.4
% A
2.8 Vol Ctrl > 4.5V Vol Ctrl > 4.5V, Zload > 30K 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 39 100 800 250 150 30 0 31.5 1.5
VRMS dB dB dB MHz
Total Output Noise
eN
f = 20Hz to 22KHz, Play Max Attenuation f = 20Hz to 22KHz, Mute
V
Slew Rate Input Resistance Variable Output Resistance Variable Output Load
SR Ri RVar Out Rload Var
V/S k k
Supply voltage Rejection
SVR
dB 65 150 160 C C
Thermal Muting Thermal Shut-down
TM TS
GMA7496LV1.00
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GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Electrical Characteristics (continued)
Refer to the test circuit: VS = 14V, RL = 80, Rg = 50 , TA = 25C
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
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 Stand-by Bias Current VST ON VST OFF VM ON VM OFF IqST-BY AMUTE IST-BYBIAS Stand by on VST-BY = 5V Play or Mute 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
Mute Bias Current
ImuteBIAS
A
Application Suggestions:
The recommended values of the external components are those shown in the application circuit of figure 1. However, different values can be used from the following table of references for further helpr.
Component
R1 R2 P1 C1 C2 C3 C4 C5 C6 C7 C8 C9
Suggestion Value
300K 10K 50K 1000F 470nF 470nF 470F 100nF 1000F 1F 1000F 100nF
Purpose
Volume control circuit Mute time constant Volume control circuit Supply voltage bypass Input DC decoupling Input DC decoupling Ripple rejection Volume control time constant Output DC decoupling Mute time constant Output DC decoupling Supply voltage bypass
Larger than Suggestion
Longer volume regulation time Longer mute on/off time
Smaller than Suggestion
Shorter volume regulation time Shorter mute on/off time
Danger of oscillation Lower low frequency cutoff Lower low frequency cutoff Better SVR Larger volume regulation time Lower low frequency cutoff Longer mute on/off time Lower low frequency cutoff Higher low frequency cutoff Higher low frequency cutoff Worse SVR Smaller volume regulation time Higher low frequency cutoff Shorter mute on/off time Higher low frequency cutoff Danger of oscillation
GMA7496LV1.00
5
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Application Circuit:
Mute Stand-By Truth Table
MUTE H L H L ST-BY H H L L OPERATING CONDITIO STANDBY STANDBY MUTE PLAY
GMA7496LV1.00
6
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL Turn ON/OFF Sequences (for optimizing the POP performances)
A. USING MUTE AND STAND-BY FUNCTIONS
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 KGM7496L must be brought to mute from the play condition when the SVR pin is higher than 2.5V
GMA7496LV1.00
7
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Typical Performance Characteristics:
Quiescent current vs. Supply Voltage Output DC Voltage vs. Supply Voltage
Vodc (V) 9.5 9 8.5 8 7.5 7 6.5 6 5.5 5 4.5 4 10 Vi = 0
11
12
13
14
15
16
17
18
Supply Voltage (V)
Output DC Offset vs. Supply Voltage
Output Power vs. Supply Voltage
Distortion vs. Output Power
Closed Loop gain vs. Frequency
GMA7496LV1.00
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GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Typical Performance Characteristics (continuous):
St-By Attenuation vs. Vpin 11 Mute Attenuation vs. Vpin 12
Pin Descriptions
VS
VS
VS
30K 20K SVR 20K 6K 1K 30K 6K 1K
OUT L
OUTR
100A
GMA7496LV1.00
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GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Pin Descriptions (continued)
PINS: INL, INR
VS 500A 6K
PINS: VAROUT-L, VAROUT-R VS
IN 30K SVR
VAROUT
PINS: VOLUME VS 10A
PINS: MUTE VS 200 10K 50A
MUTE VOL
PINS: PW-GND, S-GND
PINS: OUT L, OUT R OUT L
GND
VS
OUT R
GMA7496LV1.00
PINS: STBY
VS 10A 200
STBY
65K
10
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Package Outline Dimensions - DIP 20
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 .510 MIN
Inches mm
GMA7496LV1.00
11
GMA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
Ordering Number
GMA 7496L D20
APM Gamma Micro Circuit Type Package Type D20: DIP-20 S20: SOP-20
T
Shipping Type
T: Tube R: Tape & Reel
GMA7496LV1.00
8 12 10 6

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