Obsolete Product(s) - Obsolete Product(s)
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TDA7482
Table 5. Electrical Characteristcs (Refer to the test circuit, V
CC
= ±21V; R
L
= 8Ω; R
S
= 50Ω;
R
F
= 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; T
amb
= 25°‘C unless otherwise specified.)
*: The output LC filtermust be changed to: L = 30µH; C = 1µF
**: P
O
= measured across the load using the following inductor: COIL 58120 MPPA2 (magnetics) TURNS: 28 φ 1mm
***: The zero-signal switching frequency can be obtained using the following expression: F
SW
= B
F
/R
F
****: The maximum value of R
F
is related to the maximum possible value for the voltage drop on R
F
itself
(1) For V10 >5.2V, an input impedance of 10KΩ is to be considered
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
Supply Range ±10 ±25 V
I
q
Total Quiescent Current
R
L
= ∞, No LC Filter
40 60 mA
V
OS
Output Offset Voltage Play Condition –70 -30 10 mV
P
O
Output Power THD = 10%
THD = 1%
20
14
25
18
W
W
P
O
Output Power R
L
= 4Ω ; V
CC
= ±16V;
THD = 10%
THD = 1% (*)
25
18
W
W
P
D
Maximum Dissipated Power V
CC
=±21V; R
L
= 8Ω;
P
O
= 25W THD 10%
3.8 W
η
Efficiency ≡ (∗∗)
V
CC
= ±21V; R
L
= 8Ω;
P
O
= 18W THD 10%
87 %
η
max
Top Efficiency maximum V
CC
= ±25V; R
L
= 8Ω;
P
O
= 43W THD 20%
88.5 %
THD Total Harmonic Distortion R
L
= 8Ω; P
O
= 1W 0.1 %
I
max
Overcurrent Protection Threshold R
L
= 0 3.5 5 A
T
j
Thermal Shut-down Junction
Temperature
150 °C
G
V
Closed Loop Gain 29 30 31 dB
e
N
Total Input Noise A Curve
f = 20Hz to 22KHz
7
12
µV
µV
V
CCTOT MAX
Maximum Total V
CC
Protection 50 V
R
i
Input Resistance 20 30 kΩ
SVR Supply Voltage Rejection f = 100Hz; V
r
= 0.5 46 60 dB
T
r
, T
f
Rising and Falling Time 50 ns
R
DSON
Power Transistor on Resistance 0.4 Ω
F
SW-OP
Switching Frequency Operative
Range
100 200 KHz
F
SW
Switching Frequency 100 120 140 KHz
B
F
Zero Signal Frequency
Constant (***)
1.4x10
9
HzΩ
R
F
Frequency Controller Resistor
Range (****)
71214KΩ
MUTE & STAND-BY FUNCTIONS
V
ST-BY
Stand-by range 0.8 V
V
MUTE
Mute Range 1.8 2.5 V
V
PLAY
Play Range (1) 4 V
A
MUTE
Mute Attenuation 60 80 dB
I
qST-BY
Quiescent Current @ Stand-by 3 5 mA
P
o
P
O
P
D
+
--------------------
P
o
P
I
---
≡
