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TDA7490L
15W+15W STEREO CLASS-D AMPLIFIER 28W MONO IN BTL
TDA7490L15W + 15W STEREO CLASS-D AMPLIFIER
28W MONO IN BTL
15W + 15W OUTPUT POWER:
RL = 8Ω/4Ω; THD = 10%
HIGH EFFICIENCY
WIDE SUPPLY VOLTAGE RANGE (FROM
±10 TO ±25V)
SPLIT SUPPLY
TURN OFF/ON POP FREE
ST-BY AND MUTE FEATURES
SHORT CIRCUIT PROTECTION ACROSS
THE LOAD
THERMAL OVERLOAD PROTECTION
EXTERNALLY SINCHRONIZABLE
BRIDGE CONFIGURATION
DESCRIPTIONThe TDA7490L is a dual audio class D amplifier
assembled in Flexiwatt 25 package; it is specially
designed for high efficiency application mainly for
TV and Home Stereo sets.
Figure 1. Test and application circuit. (Stereo Configuration)
Figure 2. Test and application circuit. (Bridge Configuration)
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
TDA7490L
PIN CONNECTION (Top view)
PIN FUNCTIONS
TDA7490L
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±17V; RL = 8Ω; Demod. filter L =30mH, C = 220nF; f = 1KHz; fsw = 200kHz; Tamb = 25°‘C unless otherwise specified.)
*: PO = measured across the load using the following inductor:
COIL58120 MPPA 2 (magnectics) TURNS = 20 ø 1mm
(1) L = 15μH, C = 470nF
(3) ΔGv 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
TDA7490L
Figure 3. P.C. Board and component layout of the Figs. 1, 2.(for Stereo and Bridge compatible configuration)
TDA7490L
0.01THD
(%)
D99AU1086
Stereo
VS ± 17V; Rl=8W;
f=1KHz
Figure 4. Distortion vs. Output PowerTHD
(%)
D99AU1084
Stereo
VS ± 13V; Rl=4W;
f=1KHz
Figure 5. Distortion vs. Output Power(dB)
Figure 6. Crosstalk vs. Frequency
02468 10 12 14 PO(W)0
Ptot
(W)
Figure 8. Power Dissipation vs. Output Power 50.01
D99AU1104
Bridge
VS ± 13V;
Rl=8W
f=1KHz
TDA7490L
