TDA7294 ST 100V – 100W DMOS Audio Amplifier with Mute/ST-BY Data Sheet

Description

DESCRIPTION:

– VERY HIGH OPERATING VOLTAGE RANGE (+/-40V)
– DMOS POWER STAGE
– HIGH OUTPUT POWER (UP TO 100W MUSIC POWER)
– MUTING/STAND-BY FUNCTIONS
– NO SWITCH ON/OFF NOISE
– NO BOUCHEROT CELLS
– VERY LOW DISTORTION
– VERY LOW NOISE
– SHORT CIRCUIT PROTECTION
– THERMAL SHUTDOWN

The TDA7294 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Top-class TV). Thanks to the wide voltage range and to the high out current capability it is able to supply the highest power into both 4 Ohm and 8 Ohm loads even in presence of poor supply regulation, with high Supply Voltage Rejection.
The built in muting function with turn on delay simplifies the remote operation avoiding switching on-off noises.

CONTENTS:

– Figure 1: Typical Application and Test Circuit
– TDA7294 PIN CONNECTION (PINOUT)
– BLOCK DIAGRAM
– ABSOLUTE MAXIMUM RATINGS
– THERMAL DATA
– ELECTRICAL CHARACTERISTICS
– Figure 2: P.C.B. and components layout of the circuit of figure 1. (1:1 scale)
– APPLICATION SUGGESTIONS
– TYPICAL CHARACTERISTICS:
– Figure 3: Output Power vs. Supply Voltage
– Figure 4: Distortion vs. Output Power
– Figure 5: Output Power vs. Supply Voltage
– Figure 6: Distortion vs. Output Power
– Figure 7: Distortion vs. Frequency
– Figure 8: Distortion vs. Frequency
– Figure 9: Quiescent Current vs. Supply Voltage
– Figure 10: Supply Voltage Rejection vs. Frequency
– Figure 11: Mute Attenuation vs. V pin 10
– Figure 12: St-by Attenuation vs. V pin 9
– Figure 13: Power Dissipation vs. Output Power 4 Ohms
– Figure 14: Power Dissipation vs. Output Power 8 Ohms
– Figure 15: Principle Schematic of a DMOS unity-gain buffer.
– Figure 16: Turn ON/OFF Suggested Sequence
– Figure 17: Single Signal ST-BY/MUTE Control Circuit
– Figure 18: High Efficiency Application Circuit
– Figure 19: P.C.B. and Components Layout of the Circuit of figure 18 (1:1 scale)
– Figure 20: Power Dissipation vs. Output Power
– Figure 21: Distortion vs. Output Power
– Figure 22: Distortion vs. Output Power
– Figure 23: Power Dissipation vs. Output Power
– Figure 24: Power Dissipation vs. Output Power
– Figure 25: Bridge Application Circuit
– Figure 26: Frequency Response of the Bridge Application
– Figure 27: Distortion vs. Output Power
– Figure 28: Distortion vs. Output Power
– MULTIWATT15 PACKAGE MECHANICAL DATA

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