TDA7391 Fast Delivery |IC PHOENIX CO.,LIMITED

TDA7391 ,35W BRIDGE CAR RADIO AMPLIFIERELECTRICAL CHARACTERISTICS (V = 14.4V; R =4Ω, f = 1KHz, T =25°C, unless otherwiseS L ambspecified)S ..
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TDA7391
35W BRIDGE CAR RADIO AMPLIFIER
TDA7391
35W BRIDGE CAR RADIO AMPLIFIER
HIGH POWER CAPABILITY:
40W/4Ω MAX
35W/4Ω EIAJ
45W/3.2Ω MAX
40W/3.2Ω EIAJ
32W/3.2Ω @VS= 14.4V,f= 1KHz,d= 10%
26W/4Ω @VS= 14.4V,f= 1KHz,d= 10%
DIFFERENTIAL INPUTS (EITHER SINGLE
ENDED OR DIFFERENTIAL INPUT SIGNAL
ARE ACCEPTED)
MINIMUM EXTERNAL COMPONENTCOUNT: NO BOOTSTRAPCAPACITORS NO BOUCHEROT CELLS INTERNALLY FIXED GAIN (30dB) NO SVR CAPACITOR
ST.-BY FUNCTION (CMOS COMPATIBLE)
PROGRAMMABLE TURN-ON/OFF DELAY AUDIBLE POP DURING MUTE AND ST- OPERATIONS
PROTECTIONS:
SHORT CIRCUIT (TO GND, TO VS, ACROSS
THE LOAD)
VERY INDUCTIVE LOADS
CHIP OVERTEMPERATURE
LOAD DUMP
OPEN GND
ESD
DESCRIPTION
The TDA7391isa BRIDGE class AB audio power
amplifier specially intended for car radio High
Power applications.
The high power capability together with the possi-
bilityto operate eitherin DIFFERENTIAL INPUT
MODEor SINGLE ENDED INPUT MODE makes suitable for boosters and high end car radio
equipments.
The exclusive fully complementary output stage
and the internal fixed gain configuration drop the
external component count.
Theon board clipping detector allows easy imple-
mentationof gain compression systems.
October 1998
IN- 0.22μF 0.22μF
IN+
ST-BY 10 6
OUT+
OUT-
Vref
TDA7391
D94AU133
R1
4.7KΩ 1000μF
GNDR2
56KΩC3
33μF 100nFμC
+VS
SW1
Figure1: Test And Application Circuit
Multiwatt11
ORDERING NUMBER: TDA7391
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VCC1 VCC2
REFERENCES
STANDBYTHRESHOLD
SHORT CIRCUIT
DUMP &THERMAL
PROTECTION
ICM
COMMON
MODE
VCC/2gm
MUTE THRESHOLD
PROGRAMMABLE
CURRENT CIRCUIT
LTS V=f(Tj)
POWER AMP
POWER AMP
THD
DETECT
LTS
DISABLE11 8
IN-
IN+
OUT-
OUT+
MUTE SYNC GND STANDBY D94AU134
Figure2: Block Diagram
THERMAL DATA
Symbol Description Value Unit
Rth j-case Thermal Resistance Junction-case Max 1.8 °C/W
MUTE
SYNC
+VS
STAND-BY
OUT+
GND
OUT-
+VS
IN+
IN-
TAB CONNECTEDTOPIN6 D94AU135
PIN CONNECTION (Top view)
TDA7391
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ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit DC Supply Voltage 28 V
VOP Operating Supply Voltage 18 V
VPEAK Peak Supply Voltage(t= 50ms) 50 V Output Peak Current repetitive(f> 10Hz)
Output Peak Current non repetitive
Ptot Power Dissipation (TCASE=85°C) 43 W
Tstg,Tj Storage and Junction-Case Temperature -40to 150 °C
ELECTRICAL CHARACTERISTICS (VS= 14.4V; RL =4Ω,f= 1KHz, Tamb =25°C, unless otherwise
specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit Supply Voltage Range 8 18 V Total Quiescent Current 60 150 mA
VOS Output Offset Voltage 120 mV
ISB ST-BY Current VST-BY= 1.5V 100 μA
ISBin ST-BY Input Bias Current VST-BY =5V 10 μA
VSBon ST-BYOn Threshold Voltage 1.5 V
VSBoff ST-BYOff threshold Voltage 3.5 V
ATTST-BY ST-BY Attenuation 90 dB
IMin Mute Input Bias Current (VMUTE= 5V) 10 μA Mute Attenuation 90 dB Output Power d= 10% 1%= 10%;RL= 3.2Ω 26 EIAJ EIAJ Output Power(*) VS= 13.7V;RL= 3.2Ω 40 W MAX MAX Output Power(*) VS= 14.4V;RL= 3.2Ω 45 W Distortion= 0.1to 15W
0.03 Voltage Gain 29.5 30 30.5 dB High Frequency rolloff PO= 1W; -3dB 75 KHz
RIN Input Impedance Differential 36 60 KΩ
Single Ended 30 55 KΩ
EIN Input Noise Voltage Rg =0Ω;f = 22Hzto 22KHz 4 mV
CMRR Input Common Mode Rejection f= 1KHz; VIN= 1Vrms 65 dB
SVR Supply Voltage Rejection Rg =0Ω;Vr= 1Vrms 60 dB
CDL Clipping Detection Level 5 10 15 %
Tsd Absolute Thermal Shutdown
Junction Temperature
160 °C
(*) Saturated sqare wave output.
TDA7391
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FUNCTIONAL DESCRIPTION
Pin Function Description2 INPUTS
The input stageisa high impedance type also capableof operationin single ended mode
with one inputcapacitively coupledto the signal GND. The impedance seenbythe
inverting and non inverting input pins mustbe matched.
3,9 +VS Supply Voltage.
4CD
The TDA7391is equippedwitha diagnostic circuitry ableto detect the clippingin the
Output Signal (distortion= 10%).
The CDpin (open collector) givesout low level signal during clipping.7 OUTPUTS
The output stageisa bridge type ableto drive loadsas lowas 3.2Ω. consistsof two classAB fully complementary PNP/NPN stages fully protected.railtorail output voltage swingis achieved without needof bootstrap capacitors. external compensationis necessary. GND Ground. STAND-BY
The device featuresa ST-BY functionwhich shuts downallthe internal bias supplies
whenthe ST-BYpinis low. ST-BYmode the amplifier sinksa small current(inthe rangeof few μA).
Whenthe ST-BYpin ishightheIC becomes fully operational. SYNC resistor (R2) hastobe connect betweenpin10 and GNDin orderto program the current
that flowsintheC3 capacitor (pin 11). The valuesofC3 andR2 determinethe time
requiredto bias the amplifier. MUTE Thepinwill havea capacitor (C3) tiedto GNDtosetthe MUTE/STAND-BY time.An
automatic Mute during turn on/offis providedto prevent noisy transients.
Figure3: P.C. Board and Component Layoutof theFig.1 (1:1 scale).
TDA7391
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Figure4: Quiescent Currentvs Supply Voltage Figure5: EIAJ powervs Supply Voltage
Figure6: OutputPowervs SupplyVoltage
(@RL =4Ω)
Figure7: Distortionvs Frequency(@ RL =4Ω)
Figure8: OutputPowervs SupplyVoltage
(@RL =3.2Ω) Figure9: Distortionvs Frequency(RL =4Ω)= 3.2Ω= 14.4V =4Ω= 12W= 3.2Ω= 1KHz= (Hz)= (Hz) =4Ω= 1KHz= 14.4V= 3.2Ω= 15W =4Ω
TDA7391
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Figure 10: Supply Voltage Rejectionvs Fre-
quency
Figure 11: Common Mode Rejection vs. Fre-
quency
Figure 12: TotalPowerDissipation& Efficiencyvs.
OutputPower(@RL =4Ω)
Figure 13: PowerBandwidth= (Hz)= (Hz) f= (Hz)= 14.4V =4Ω =1W (W)= 14.4V =4Ω= 1KHz= 14.4V
Vcm= 1Vrms =4Ω =0= 14.4V= 1Vrms =4Ω =0
TDA7391
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Partno	Mfg	Dc	Qty	Available	Descript
TDA7391	ST	N/a	1292	avai	35W BRIDGE CAR RADIO AMPLIFIER