TDA7482 Datasheet, PDF (3/6 Pages) STMicroelectronics – 25W MONO CLASS-D AMPLIFIER

TDA7482
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, V_CC = ±21V; R_L = 8Ω; R_S = 50Ω;
RF = 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; Tamb = 25°‘C unless otherwise specified.)
Symbol
V_S
I_q
V_OS
PO
P_O
P_D
η
Parameter
Supply Range
Total Quiescent Current
Output Offset Voltage
Output Power
Output Power
Maximum Dissipated Power
Efficiency
≡
P_O
P_O + P_D
≡
P_O
P_I
(**)
Test Condition
R_L = ∞, No LC Filter
Play Condition
THD = 10%
THD = 1%
R_L = 4Ω ; V_CC = ±16V;
THD = 10%
THD = 1% (*)
V_CC =±21V; R_L = 8Ω;
P_Ο = 25W THD 10%
V_CC = ±21V; R_L = 8Ω;
P_Ο = 18W THD 10%
Min.
±10
–70
20
14
ηmax
THD
Top Efficiency maximum
Total Harmonic Distortion
V_CC = ±25V; R_L = 8Ω;
P_Ο = 43W THD 20%
R_L = 8Ω; P_O = 1W
I_max
Overcurrent Protection
R_L = 0
3.5
Threshold
T_j
Thermal Shut-down Junction
Temperature
G_V
Closed Loop Gain
29
e_N
Total Input Noise
A Curve
f = 20Hz to 22KHz
VCCTOT MAX Maximum Total VCC Protection
50
R_i
Input Resistance
20
SVR
Supply Voltage Rejection
f = 100Hz; V_r = 0.5
46
T_r, T_f
Rising and Falling Time
R_DSON Power Transistor on Resistance
F_SW-OP Switching Frequency Operative
100
Range
F_SW
Switching Frequency
100
B_F
Zero Signal Frequency
Constant (***)
R_F
Frequency Controller Resistor
7
Range (****)
MUTE & STAND-BY FUNCTIONS
V_ST-BY
Stand-by range
V_MUTE
Mute Range
1.8
V_PLAY
Play Range (1)
4
A_MUTE
Mute Attenuation
60
I_qST-BY Quiescent Current @ Stand-by
*: The output LC filter must be changed to: L = 30µH; C = 1µF
**: PO = measured across the load using the following inductor:
COIL 58120 MPPA2 (magnetics) TURNS: 28 ∅ 1mm
***: The zero-signal switching frequency can be obtained using the following expression: FSW = BF/RF
****: The maximum value of RF is related to the maximum possible value for the voltage drop on RF itself
(1) For V10 >5.2V, an input impedance of 10KΩ is to be considered
Typ.
40
-30
25
18
25
18
3.8
87
88.5
0.1
5
150
30
7
12
30
60
50
0.4
120
1.4x10⁹
12
80
3
Max.
±25
60
10
31
200
140
14
0.8
2.5
5
Unit
V
mA
mV
W
W
W
W
W
%
%
%
A
°C
dB
µV
µV
V
kΩ
dB
ns
Ω
KHz
KHz
HzΩ
KΩ
V
V
V
dB
mA
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