7490 Просмотр технического описания (PDF) - STMicroelectronics
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7490 Datasheet PDF : 9 Pages
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TDA7490
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±21V; RL = 8Ω; Demod. filter L =
30mH, C = 220nF; f = 1KHz; fsw = 200kHz; Tamb = 25°‘C unless otherwise specified.)
Symbol
VS
Iq
VOS
PO
PO(BTL)
PO (1)
PD
η (2)
THD
Imax
Tj
GV
∆GV (3)
eN
CT
Ri
SVR
Vrmax
Tr, Tf
RDSON
FSW (4)
VST-BY
VMUTE
VPLAY
AMUTE
IqST-BY
Parameter
Test Condition
Supply Range
Total Quiescent Current
RL = ∞ no LC filter
Output Offset Voltage
Output Power
THD = 10%
THD = 1%
Output Power in Bridge
Configuration
Vs =±22V; RL = 16Ω
THD = 10%
THD = 1%
Vs =±17V; RL = 8Ω
THD = 10%
THD = 1%
Output Power
RL = 4Ω VCC = ±16V
THD = 10%
THD = 1%
Maximum Dissipated Power
VCC = ±21V; RL = 8Ω
PO = 25W + 25W; THD = 10%
Efficiency (*)
PO = 25W + 25W
Total Harmonic Distortion
RL = 8Ω; PO = 1W
Overcurrent Protection
Threshold
RL = 0
Thermal Shut-down Junction
Temperature
Closed Loop Gain
Gain Matching
Total Input Noise
RG = 50Ω
A Curve
f = 20Hz to 22KHz
Cross talk
f = 1KHz, PO = 1W
Input Resistance
Supply Voltage Rejection
Overvoltage Threshold (5)
f = 100Hz; Vr = 0.5
Rising and Falling Time
Power Transistor on Resistance
Switching Frequency Range
MUTE & STAND-BY FUNCTIONS
Stand-by range
Mute Range
Play Range
Mute Attenuation
Quiescent Current @ Stand-by
*: PO = measured across the load using the following inductor:
COIL58120 MPPA 2 (magnectics) TURNS = 20 ø 1mm
(1) L = 15µH, C = 470nF
(2) ηTop = 90% where VCC = ±25V; RL = 8Ω; PO = 43W + 43W; THD = 20%
(3) ∆Gv is intended with R2, R17, R5, R9 1% precision
(4) FSW = 0.25 ⋅ (1/(300ns + R13 ⋅ ( C17 + 76pF) ⋅ 0.85)
(5) VRMAX = (+VCC) - (-VCC) when VR ≥VRMAX the device goes in Stand-By mode
Min. Typ. Max. Unit
±10
±25
V
70
120 mA
–150
+150 mV
25
W
18
W
50
W
40
W
50
W
40
W
25
W
18
W
6
W
89
%
0.1
%
3.5
5
A
150
°C
30
dB
-1
+1
dB
7
µV
12
µV
55
dB
30
kΩ
60
dB
55
60
V
50
ns
0.4
Ω
100 200 230 KHz
0
0.7
V
1.7
2.5
V
4
5
V
60
dB
3
mA
4/9
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