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PDF GMA7496L Data sheet ( Hoja de datos )
| Número de pieza | GMA7496L | |
| Descripción | 2W+2W AMPLIFIER W/ DC VOLUME CONTROL | |
| Fabricantes | Gamma Microelectronics | |
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AA
MICROELECTRONICS
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.
Audio Amp.
GMA7496L
2W+2W AMPLIFIER W/ DC VOLUME CONTROL
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
GND 1,2,3,13,
18,19,20
INR
470nF
9
30K
Varout_R
7
VS
15,16
Volume
OP- Amp
+
-
INL
470nF
4
SVR 10
470µF
Volume
30K
6
Volume
MUTE/STBY
PROTECTIONS
+
-
OP- Amp
60K
5
Varout_L +5V
100nF
300K
1000µF
14
OUTR
11 STBY
12 MUTE
10K
1µF
17 OUTL
1000µF
S1 ST-BY
+5V
S_GND
+5V
S2 MUTE
www.gammamicro.com 1
1 page  
AA
MICROELECTRONICS
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
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
Danger of oscillation
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 Larger volume regulation
costant
time
Smaller volume regulation time
C6
1000µF
Output DC decoupling Lower Low frequency cutoff Higher low frequency cutoff
C7
1µF
Mute time costant Larger mute on/ off time
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
APPLICATION CIRCUIT
+VS C1
1000µF
PW_GND 1,2,3,13,
18,19,20
INR
C2
9
470nF
30K
Varout_R
VS
7 15,16
Volume
OP-Amp
+
-
C3
470nF 4
INL
SVR 10
C4
470µF
Volume
30K
MUTE/STBY
PROTECTIONS
+
-
OP- Amp
6
Volume
5
Varout_L
C5
100nF
R1
300K
TP1
VOL
P1
50K
LOG
C9
0.1µF
C8
1000µF
14
PW_GND
OUTR
S1 STBY
11 +5V
12 R2 10K
S_GND
C7
60K 1µF
17
+5V
S2 MUTE
OUTL
C6
1000µF
PW_GND
+5V
5
5 Page 
AA
MICROELECTRONICS
Audio Amp.
GMA7496L
2W+2W AMPLIFIER W/ DC VOLUME CONTROL
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet GMA7496L.PDF ] | |
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