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TDA7298 Datasheet(Fiches technique) 3 Page - STMicroelectronics

Numéro de pièce TDA7298
Description  28W Hi-Fi AUDIO POWER AMPLIFIER WITH MUTE / STAND-BY
Télécharger  11 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
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ELECTRICAL CHARACTERISTICS (Refer to the test circuit, GV = 32dB; VS + 18V; f = 1KHz; Tamb =
25
°C, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VS
Supply Range
+6
+22
V
Iq
Total Quiescent Current
VS = +22V
20
40
70
mA
Ib
Input Bias Current
+0.5
µA
VOS
Input Offset Voltage
+15
mV
IOS
Input Offset Current
+200
nA
PO
Music Output Power
IEC268-3 Rules (*)
VS = + 20, RL =8
Ω,
d = 10%, t = 1s
28
W
PO
Output Power (continuous RMS)
d = 10%
RL = 4
Ω VS = +14V
RL =8
20
20
24
24
W
W
d= 1%
RL =4
Ω VS = +14V
RL =8
17
17
W
W
d
Total Harmonic Distortion
RL =4
Ω VS = +14V
PO = 0.1 to 10W;
f = 100Hz to 15KHz
RL =8
PO = 0.1 to 10W;
f = 100Hz to 15KHz
0.1
0.1
0.7
0.5
%
%
SR
Slew Rate
3
5
V/
µs
GV
Open Loop Voltage Gain
80
dB
eN
Total Input Noise
A Curve
f = 20Hz to 20KHz
2
310
µV
µV
Ri
Input Resistance
500
K
SVR
Supply Voltage Rejection
f = 100Hz, Vripple =1VRMS
40
50
dB
TS
Thermal Shutdown
145
°C
MUTE/STAND-BY FUNCTION (Ref. –VS)
VTST-BY
Stand-by - Threshold
1
1.8
V
VTPLAY
Play Threshold
2.7
4
V
Iq ST-BY
Quiescent Current @ Stand-by
Vpin 3 = 0.5V
1
3
mA
ATTST-BY
Stand-by Attenuation
70
90
dB
Ipin3
Pin 3 Current @ Stand-by
–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
2
out/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.
THERMAL DATA
Symbol
Description
Value
Unit
Rth j-case
Thermal Resistance Junction-case
Max
2.5
°C/W
TDA7298
3/11




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