10W MONO CLASS-D AMPLIFIER
TDA7481
18W MONO CLASS-D AMPLIFIER
18W OUTPUT POWER: RL = 8Ω/4Ω; THD = 10% HIGH EFFICIENCY WIDE SUPPLY VOLTAGE RANGE (UP...
Description
TDA7481
18W MONO CLASS-D AMPLIFIER
18W OUTPUT POWER: RL = 8Ω/4Ω; THD = 10% HIGH EFFICIENCY WIDE SUPPLY VOLTAGE RANGE (UP TO ±25V) SPLIT SUPPLY OVERVOLTAGE PROTECTION ST-BY AND MUTE FEATURES SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION DESCRIPTION The TDA7481 is an audio class-D amplifier assembled in Multiwatt15 package specially designed for high efficiency applications mainly for TV and Home Stereo sets. Figure 1: Test and Application Circuit.
Multiwatt15
ORDERING NUMBER: TDA7481
+5V R1 10K R2 10K ST-BY MUTE
+VCC
C5 100nF -VCC (Pin 14,15)
R3 30K ST-BY/ MUTE IN1 10
C6 100nF VCC POW 13 11 3 VCC SIGN
C7 2200µF
N.C. 4
C1 2.2 µF
BOOT C11 100nF OUT C12 560pF R5 150Ω L1 60µH
IN1 C2 0.33µF C4 4.7nF C3 1nF
9
+
PRE
+
PWM
1
5 FEEDCAP 12 SGN-GND 2 6 FREQ C8 270pF R4 12KΩ (RF) C9 100nF -VCC C10 2200µF 8 -VCC SIGN 14,15 -VCC POW VREG
C14 470nF
8Ω
7
C15 100nF BOOTDIODE
D96AU534C
February 1998
1/6
TDA7481
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Ptot Tstg, Tj VFREQ Top ESD DC Supply Voltage Power Dissipation Tcase = 70°C Storage and Junction Temperature Maximum Voltage Across RF (pin 6) Operating Temperature Range Max ESD On Pins Parameter Value ±25 35 –40 to 150 8 0 to 70 ±1.2 Unit V W °C V °C KV
PIN CONNECTION (Top view)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
D96AU535A
-VCC POW -VCC POW +VCC POW VREG +VCC SIGN ST-BY/MUTE IN -VCC SIGN SGN-GND FREQ FEEDCAP N.C. BOOT BOOTDIODE OUT
TAB CONNECTED TO PIN 8
THERMAL DATA
Symbol Rth j-case Parameter Thermal Resistanc...
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