TDA7298 Datasheet, PDF (3/11 Pages) STMicroelectronics – 28W Hi-Fi AUDIO POWER AMPLIFIER WITH MUTE / STAND-BY

TDA7298
THERMAL DATA
Symbol
R_{th j-case}
Description
Thermal Resistance Junction-case
Value
Max
2.5
Unit
°C/W
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, GV = 32dB; VS + 18V; f = 1KHz; Tamb =
25°C, unless otherwise specified.)
Symbol
V_S
Iq
I_b
V_OS
I_OS
P_O
P_O
d
Parameter
Supply Range
Total Quiescent Current
Input Bias Current
Input Offset Voltage
Input Offset Current
Music Output Power
IEC268-3 Rules (*)
Output Power (continuous RMS)
Total Harmonic Distortion
Test Condition
VS = +22V
V_S = + 20, R_L = 8Ω,
d = 10%, t = 1s
d = 10%
RL = 4Ω V_S = +14V
R_L = 8Ω
d = 1%
R_L = 4Ω V_S = +14V
R_L = 8Ω
R_L = 4Ω V_S = +14V
P_O = 0.1 to 10W;
f = 100Hz to 15KHz
Min. Typ. Max. Unit
+6
+22
V
20
40
70
mA
+0.5 µA
+15 mV
+200 nA
28
W
20
24
W
20
24
W
17
W
17
W
0.1
0.7
%
SR
Slew Rate
G_V
Open Loop Voltage Gain
e_N
Total Input Noise
R_i
Input Resistance
SVR
Supply Voltage Rejection
T_S
Thermal Shutdown
MUTE/STAND-BY FUNCTION (Ref. –VS)
R_L = 8Ω
PO = 0.1 to 10W;
f = 100Hz to 15KHz
A Curve
f = 20Hz to 20KHz
f = 100Hz, Vripple = 1VRMS
0.1
0.5
%
3
5
V/µs
80
dB
2
µV
3
10
µV
500
KΩ
40
50
dB
145
°C
VT_ST-BY
VT_PLAY
Iq ST-BY
ATT_ST-BY
I_pin3
Stand-by - Threshold
Play Threshold
Quiescent Current @ Stand-by
Stand-by Attenuation
Pin 3 Current @ Stand-by
Vpin 3 = 0.5V
1
1.8
V
2.7
4
V
1
3
mA
70
90
dB
–1
+10
µA
Note (*):
MUSIC POWER CONCEPT
MUSIC POWER is ( according to the IEC clauses n.268-3 of Jan 83) the maximal power which the amplifier is capable of producing across the
rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz.
According to this definition our method of measurement comprises the following steps:
1) Set the voltage supply at the maximum operating value -10%
2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses is > 60 sec
3) The output voltage is measured 1 sec from the start of the pulse
4) Increase the input voltage until the output signal show a THD = 10%
5) The music power is then V^2out/R1, where Vout is the output voltage measured in the condition of point 4) and R1 is the rated load impedance
The target of this method is to avoid excessive dissipation in the amplifier.
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