80V - 80W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
VERY HIGH OPERATING VOLTAGE RANGE (±38V) DMOS POWER STAGE HIGH OUTPUT POWER (80W @ THD = 10%, MUSIC POWER) MUTING/STAND-BY FUNCTIONS NO SWITCH ON/OFF NOISE VERY LOW DISTORTION VERY LOW NOISE SHORT CIRCUIT PROTECTION THERMAL SHUTDOWN CLIP DETECTOR MODULARITY (MORE DEVICES CAN BE EASILY CONNECTED IN PARALLEL TO DRIVE VERY LOWIMPEDANCES) DESCRIPTION The TDA7295S 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, TopFigure 1: Typical Application and Test Circuit MULTIPOWER BCD TECHNOLOGY
Multiwatt15 ORDERING NUMBER: TDA7295SV
class TV). Thanks to the wide voltage range and to the high out currentcapability it is able to supply the highest power into both 4Ω and 8Ω loads. The built in muting function with turn on delay simplifies the remote operation avoiding switching on-off noises. Parallel mode is made possible by connecting more device through of pin11. High output power can be delivered to very low impedance loads, so optimizing the thermal dissipation of the system.
C7 100nF R3 22K C222µF +Vs R2 680Ω C1 470nF IN2 7 BUFFER DRIVER 11
+PWVs 13 14 OUT BOOT LOADER C5 22µF 6 5 BOOTSTRAP CLIP DET VCLIP (*)
R1 22K SGND (**) VMUTE R5 10K MUTE 10 MUTE VSTBY R4 22K 1 STBY-GND C3 10µF C4 10µF 8 -Vs C9 100nF -Vs 15 -PWVs C8 1000µF STBY 9 STBY THERMAL SHUTDOWN S/C PROTECTION 4
(*) see Application note (**) for SLAVE functionJune 2000
PIN CONNECTION (Top view)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 -VS (POWER) OUT +VS (POWER) BOOTSTRAP LOADER BUFFER DRIVER MUTE STAND-BY -VS (SIGNAL) +VS (SIGNAL) BOOTSTRAP CLIP AND SHORT CIRCUIT DETECTOR SIGNAL GROUND NON INVERTING INPUT INVERTING INPUT STAND-BY GND
TAB CONNECTED TO PIN 8
QUICK REFERENCE DATA
Symbol VS GLOOP Ptot SVR ParameterSupply Voltage Operating Closed Loop Gain Output Power Supply Voltage Rejection VS = ±34V; RL = 8Ω; THD = 10% VS = ±27V; RL = 4Ω; THD = 10% Test Conditions Min. ±12 26 80 80 75 Typ. Max. ± 38 40 Unit V dB W W dB
ABSOLUTE MAXIMUM RATINGS
Symbol VS V1 V2 V2 - V3 V3 V4 V5 V6 V9 V10 V11 V12 IO Ptot Top Tstg, Tj Parameter Supply Voltage (No Signal) VSTAND-BY GND Voltage Referred to -VS (pin 8) InputVoltage (inverting) Referred to -VS Maximum Differential Inputs Input Voltage (non inverting) Referred to -VS Signal GND Voltage Referred to -VS Clip Detector Voltage Referred to -VS Bootstrap Voltage Referred to -VS Stand-by Voltage Referred to -VS Mute Voltage Referred to -VS Buffer Voltage Referred to -VS Bootstrap Loader Voltage Referred to -VS Output Peak Current Power Dissipation Tcase = 70°COperating Ambient Temperature Range Storage and Junction Temperature Value ±40 80 80 ±30 80 80 80 80 80 80 80 80 10 50 0 to 70 150 Unit V V V V V V V V V V V V A W °C °C
Symbol Rth j-case 2/13 Description Thermal Resistance Junction-case Typ 1 Max 1.5 Unit °C/W
ELECTRICAL CHARACTERISTICS (Refer to the Test Circuit VS = ±30V, RL = 8Ω, GV = 30dB; Rg = 50 Ω; Tamb =25°C, f = 1 kHz; unless otherwise specified).
Symbol VS Iq Ib VOS IOS PO Parameter Operating Supply Range Quiescent Current Input Bias Current Input Offset Voltage Input Offset Current RMS Continuous Output Power d = 0.5%: VS = ± 30V, R L = 8Ω VS = ± 26V, R L = 6Ω VS = ± 22V, R L = 4Ω d = 10%; RL = 8Ω ; VS = ±34V (***)RL = 4Ω; VS = ±27V PO = 5W; f = 1kHz PO = 0.1 to 30W; f = 20Hz to 20kHz VS = ±22V, RL = 4Ω: PO = 5W; f = 1kHz PO = 0.1 to 30W; f = 20Hz to 20kHz IMAX SR GV GV eN fL, fH Ri SVR TS VST on VST off ATTst-by Iq st-by VMon VMoff ATTmute Overcurrent Protection Threshold Slew Rate Open Loop Voltage Gain Closed Loop Voltage Gain Total Input Noise Frequency Response (-3dB) Input Resistance Supply Voltage Rejection Thermal Shutdown f = 100Hz; Vripple = 0.5Vrms A = curve f = 20Hz to...