TDA7372A

TDA7372A ® 4 x 6W POWER AMPLIFIER FOR CAR RADIO HIGH POWER CAPABILITY: 4x6W min/4Ω @14.4V, 1KHz, 10% 4x10W typ/2Ω @14.4V, 1KHz, 10% MINIMUM EXTERNAL COMPONENT COUNT - INTERNALLY FIXED GAIN (20dB) - NO BOOTSTRAP CAPACITORS - NO EXTERNAL COMPENSATION ST-BY FUNCTION (CMOS COMPATIBLE) MUTE FUNCTION (CMOS COMPATIBLE) NO AUDIBLE POP DURING MUTE/ST-BY OPERATIONS LOW SUPPLY SELF MUTING PROGRAMMABLE TURN ON DELAY PROTECTIONS: AC OUTPUT SHORT CIRCUIT TO GND DC OUTPUT SHORT CIRCUIT TO GND AND TO VS AT POWER ON SOFT THERMAL LIMITER OVERRATING CHIP TEMPERATURE RE LOAD DUMP VOLTAGE BLOCK DIAGRAM e t e ol ) (s t c u ) s ( ct u d o r P MULTIWATT15 T15 R: TDA ORDERING NUMBER: TDA7372A FORTUITOUS OPEN G GND REVERSED ED BATTERY BATTE ESD PROTECT PROTECTION e t e ol DESCRIPTION ESCRIPT The TDA7372A is a new technology class AB quad TD channels Audio Power Amplifier in Multiwatt15 cha package designed for car radio applications. Thanks to the fully complementary PNP/NPN output configuration the TDA7372A delivers a rail to rail voltage swing with no need of boostrap capacitors. s b O d o Pr s b O September2003 1/10 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. TDA7372A PIN CONNECTION (Top view) ABSOLUTE MAXIMUM RATINGS Symbol VS VOP VPEAK IO IO Ptot Tstg, Tj ) s ( t c u d o Pr Parameter meter ) s ( t c u d o r P e t e l o s b O Value Unit DC Supply Voltage 28 V Operating Supply Voltage e Peak Supply Voltage e (t = 50m 50ms) 18 50 V V Output Peak Current urrent (no (not rep. t = 100μs) 4 A Output Peak Curren Current (rep. f > 10Hz) 3 A Power er Dissipation Dissipat (Tcase = 85°C) Storage and Junction Temperature 32 -40 to 150 W °C e t e ol s b O THERMAL DATA Symbol Rth j-case 2/10 Description Thermal Resistance Junction-case Max Value Unit 2 °C/W TDA7372A ELECTRICAL CHARACTERISTICS (Refer to the test circuit; VS = 14.4V; RL = 4Ω, Tamb = 25°C, f = 1kHz, unless otherwise specified) Symbol VS Id PO Parameter Supply Range Total Quiescent Drain Current Output Power d Distortion CT Cross Talk RIN GV GV BW ENO SVR ASB ISB IPIN 7 VSB IN VSB OUT AM VM IN VM OUT Input Impedance Voltage Gain Voltage Gain Match. Bandwidth Output Noise Voltage (*) Supply Voltage Rejection Stand-by Attenuation ST-BY Current Consumption ST-BY Pin Current ST-BY IN Threshold Voltage ST-BY OUT Threshold Voltage MUTE Attenuation MUTE IN Threshold Voltage ge MUTE OUT Threshold d Voltage Test Condition RL = 4Ω; THD = 10% each channel RL = 2Ω; THD = 10% each channel RL = 4Ω; PO = 0.1 to 3W f = 1kHz; Rg = 0 f = 10kHz; Rg = 0 Typ. 6 6.5 Unit V mA W 10 W 0.04 54 @ -3dB Rg = 0 Rg = 0; f = 100Hz e t e l o s b O Max. 18 150 0.3 60 55 % dB d dB KΩ dB dB KHz μV dB dB μA μA mA ) s ( t c u d o r P 35 19 20 21 1 100 120 48 80 8 Vpin7 = 1.5V Play mode; Vpin7 = 5V Output Under (Max der Short (M driving current unde under fault) ) s ( t c u od (*) 22Hz to 22KHz Min. 8 100 30 5 1.5 3.5 80 1.5 3.5 V V dB V V r P e t e l o s b O 3/10 TDA7372A TEST AND APPLICATION CIRCUIT ) s ( ct R2 e t e l o s b -O 10μF C13 u d o r P Figure 1: P.C. Board and components layout out of the Test Te and Application Circuit (1:1 scale) ) s ct( u d o r P e t e l o s b O 4/10 TDA7372A Figure 2: Quiescent Drain Current vs. Supply Voltage Figure 4: Output Power vs Supply Voltage e t e ol ) s t( c u d o r P Figure gure 6: D Distortion vs. Output Power s b O Figure 3: Output Power vs. Supply Voltage ) s ( t c u d o r P e Figure 5: Output power vs vs. Frequency vs.COUT Value ue t e l o s b O - Figure 7: Distortion vs. Output Power 5/10 TDA7372A Figure 8: Distortion vs. Frequency Figure 9: Distortion vs. Frequency Figure 10: Cross-Talk vs. Frequency ) s t( c u d o r P e t e l o ) s ( t c u d o r P e t e l o s b -O Figure gure 12: Total Power Dissipation and Efficiency vs. Output Power s b O Ptot (W) Figure 11: Supply Voltage Rejection vs. Frequency Re Figure 13: Total Power Dissipation and Efficiency vs. Output Power Ptot (W) Ptot Ptot 6/10 TDA7372A 10μF Figure 14: TDA7313 + 7372 Application Circuit ) s ct( ) s ( t c u d o r P e t e l o s b -O u d o r eP t e l o s b O 7/10 TDA7372A FUNCTIONAL DESCRIPTION Function Description GENERAL The TDA7372A is a quad channel single package audio power amplifier intended to reduce the mismatch in the electrical characteristics among the four different channels and to consistently drop the external component count. It contains four non inverting stages capable to operate down to 20dB gain so minimizing the output noise and optimizing SVR and distortion. OUTPUT STAGE The output stage is a single ended type suitable to drive 4Ω loads. It consists of a class AB fully complementary PNP/NPN stages short circuit protected. A rail to rail output swing is achieved without need of boostrap capacitors. Moreover, the external compensation is not necessary. ST-BY MUTE THERMAL PROTECTION BUILT-IN SHORT CIRCUIT PROTECTION The device features a St-BY function which shuts down the internal bias generators when the ST-BY input is low. In ST-BY mode the amplifier sinks a small current (in the range of few μAs). When the St-BY pin is high the IC becomes fully operational. evel effectively effectiv A mute function is also provided. This reduces the gain of the input stage to a level eliminating any audio input influence on the output stage when the mute line iss low. When the mute line is high the normal input path is restored. oltage goes goe below the The device goes automatically into mute state when the supply voltage volt minimum allowable value. This prevents pop noises whenever the battery voltage drops below dev a fixed threshold. When the supply voltage rises to it nominal value the device recovers the play condition with a delay fixed by the CSVR capacitor. teps The Thermal protection principle involves two different steps a) Soft thermal limitation b) Shutdown As long as the junction temperature remains below a preset threshold, the I.C. will deliver the n reached, reached the device automatically goes into mute full power. Once the threshold has been status. The play to mute transition iss internally controlled so producing a soft muting without he junction temperature does not reduce to safe levels, a unpleasant effect. Supposing the complete shutdown will occur. assure reliable and safe operation in presence of: A built-in protection circuitit assures - AC short circuit to GND - DC short circuit to GND and to VS during power-on phase a The DC short protector acts in a way to avoid that the device is being turned on (by ST-BY) when a DC short is prese present from OUT to GND or OUT to VS. Due to this reason it is necessary uce a proper prop delay on the st-by pin (expecially when it is driven by VS.) to introduce Moreover, eover, as the t involved circuitry is normally disabled when a current higher than 5mA is fed st-b pin, it is important, in order not to disable it, to have the external current source into the st-by driving tthe pin itself limited to 5mA. (figure 1 is shows the relevant waveforms). ) s t( c u d o r P e t e l o s b O Figure ure 15: Fa Fault (DC short) waveforms 8/10 ) s ( t c u d o r P e t e l o s b -O TDA7372A mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D 0.063 1 0.039 E 0.49 0.55 0.019 0.022 F 0.66 0.75 0.026 0.030 G 1.02 1.27 1.52 0.040 0.050 0.060 G1 17.53 17.78 18.03 0.690 0.700 0.710 H1 19.6 0.772 H2 20.2 L OUTLINE AND MECHANICAL DATA ) s ( t c u d ro 0.795 21.9 22.2 22.5 0.862 0.874 0.886 L1 21.7 22.1 22.5 0.854 0.870 0.886 L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 0.713 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 0.191 0.114 M1 4.63 5.08 5.53 0.182 0.200 0.218 P e t e l o Multiwatt15 V s b O - S 1.9 2.6 0.075 S1 1.9 2.6 0.075 0.102 0.102 Dia1 3.65 3.85 0.144 0.152 ) s ct( u d o r P e t e l o s b O 9/10