KL7496L

TECHNICAL DATA
2W+2W AMPLIFIER WITH
DC VOLUME CONTROL
KL7496L
DESCRIPTION
The KL7496L is a stereo 2W+2W class AB power amplifier, specially designed
for high quality sound, TV and Monitor applications.
Features of the KL7496L include linear volume control,
Stand-by and mute functions.
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2W+2W OUTPUT POWER
RL = 8Ω @THD = 10% Vcc = 14V
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•
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ST-BY 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
POWERDIP (14+3+3) PACKAGE
ORDERING INFORMATION
KL7496L N Plastic
TA = 0° to 70° C
BLOCK DIAGRAM
Rev. 01
KL7496L
Absolute Maximum Ratings
Symbol
Parameter
Vs
Value
Unit
26
8
V
Vpp
VIN
DC Supply Voltage
Maximum Input Voltage
Tamb
Ambient Operating Temperature
0 to 70
ºC
Tstg, Tj
Storage and Junction Temperature
-40 to 150
ºC
V6
Volume CTRL DC voltage
7
V
Rth with "on board" Square Heatsink vs. copper
area.
PIN CONNECTION
GND
1
20
GND
GND
2
19
GND
GND
3
18
GND
INL
4
17
OUTL
VAROUT_L
5
16
Vs
VOLUME
6
15
Vs
VAROUT_R
7
14
OUTR
NC
8
13
GND
INR
9
12
MUTE
SVR
10
11
STBY
THERMAL DATA
Symbol
Parameter
Thermal Resistance Junction-pins
Rth j-pins
Rth j-amb
Thermal Resistance Junction-ambient
(*)
(*) Mounted on PCB with no heatsink
max.
Value
15
Unit
°C/W
max.
50
°C/W
ELECTRICAL CHARACTERISTICS (Refer to the test circuit Vs = 14V, RL = 80Ω,Rg = 50 Ω, Tam = 25ºC)
Symbol
Parameter
Vs
Iq
DC/Vos
Supply Voltage Range
Total Quiescent Current
Output DC Offset Referred to
SVR Potenial
Quiescent Output Voltage
Output Power
Vo
Po
THD
Ipeak
Vin
Gv
GvLine
AMin VOL
BW
Total Harmonic Distortion
Output Peak Current
Input Signal
Closed Loop Gain
Monitor Out Gain
Attenuation at Minimum
Volume
Test Condition
Min
Typ
10
25
200
No Input Signal
THD = 10%, RL = 8Ω
THD = 1%, RL = 8Ω
Gv = 30dB, Po = 1W, f = 1KHz
(internally limited)
1.6
7
2
1.3
0.7
0.9
Vol Ctrl > 4.5V
Vol Ctrl > 4.5V, Zload > 30KΩ
Vol Ctrl < 0.5V
28.5
-1.5
80
30
0
Max
Unit
18
50
V
mA
mV
0.4
0.6
2.8
31.5
1.5
V
W
W
%
A
Vrms
dB
dB
dB
MHz
Rev. 01
KL7496L
ELECTRICAL CHARACTERISTICS (continued)
Symbol
eN
Parameter
Test Condition
Min
f = 20Hz to 22KHz
Play, max volume
f = 20Hz to 22KHz
Play, max attenuation
f = 20Hz to 22KHz
Mute
Total Output Noise
Typ
Max
Unit
500
800
µV
100
250
µV
60
150
µV
SR
Slew Rate
5
8
V/µs
Ri
Input Resistance
22.5
30
KΩ
RVar Out
Variable Output Resistance
Rload Var Out
Variable Output Load
SVR
Supply Voltage Rejection
30
100
2
f = 1kHz, max volume
CSVR = 470µF, VRIP = 1Vrms
f = 1kHz, max attenuation
CSVR = 470µF, VRIP = 1Vrms
Ω
KΩ
35
39
dB
55
65
dB
TM
Thermal Muting
150
ºC
Ts
Thermal Shut-down
160
ºC
MUTE STAND-BY & INPUT SELECTION FUNCTIONS
VST ON
Stand-by ON Threshold
VST OFF
Stand-by OFF Threshold
VM ON
Mute ON Threshold
VM OFF
Mute OFF Threshold
IqST-BY
Quiescent Current @
Stand-by
Mute Attenuation
AMUTE
IstbyBIAS
ImuteBIAS
3.5
V
1.5
3.5
V
0.6
50
V
1.5
V
1
mA
65
dB
80
µA
µA
-5
µA
Stand-by bias current
Stand by on VST-BY = 5V
VMUTE = 5V
Play or Mute
Mute bias current
Mute
1
5
µA
Play
0.2
2
µA
-20
APPICATION 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 can help the designer.
COMPONENT SUGGESTION
VALUE
PURPOSE
R1
300K
Volume control circuit
R2
P1
C1
C2
C3
C4
C5
10K
50K
1000µF
470nF
470nF
470µF
100nF
C6
C7
C8
C9
1000µF
1µF
1000µF
100nF
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
SMALLER THAN
SUGGESTION
Larger volume regulation
time
Larger mute on/off time
Smaller volume regulation
time
Smaller mute on/off time
Lower low frequency cutoff
Lower low frequency cutoff
Better SVR
Larger volume regulation
time
Lower low frequency cutoff
Larger mute on/off time
Lower low frequency cutoff
Danger of oscillation
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
Rev. 01
KL7496L
Figure 1 A. Application Circuit
MUTE STAND-BY TRUTH TABLE
MUTE
H
L
H
L
ST-BY
H
H
L
L
OPERATING CONDITIO
STANDBY
STANDBY
MUTE
PLAY
Rev. 01
KL7496L
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 KL7496L must be brought to mute from the play condition when the SVR pin is higher than 2.5V
Rev. 01
KL7496L
Quiescent current vs. Supply Voltage
Output DC Voltage vs. Supply Voltage
Output DC Offset vs. Supply Voltage
Output Power vs. Supply Voltage
Distortion vs. Output Power
Closed Loop gain vs. Frequency
Rev. 01
KL7496L
St-By Attenuation vs. Vpin 11
Mute Attenuation vs. Vpin 12
Rev. 01
KL7496L
PACKAGE DIMENSION
Rev. 01