4 x 46 W quad bridge car radio amplifier
Datasheet − production data
Features
■
High output power capability:–4 x 46 W / 4 Ω max.
–4 x 27 W / 4 Ω @ 14.4 V, 1 kHz, 10 %Low distortionLow output noiseStandby functionMute function
Automute at min. supply voltage detectionLow external component count:–Internally fixed gain (26 dB)–No external compensation–No bootstrap capacitors
Protections:
–Output short circuit to GND, to VS, across the load
–Very inductive loads
–Overrating chip temperature with soft thermal limiter
–Load dump voltage–Fortuitous open GND–Reversed battery–ESD
Device summary
Order codeTDA7384A
PackageFlexiwatt25
PackingTube
Flexiwatt25■■■■■■
■
Description
The TDA7384A is an AB class audio power
amplifier, packaged in Flexiwatt 25 and designed for high end car radio applications.
Based on a fully complementary PNP/NPN configuration, the TDA7384A allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced boundary components allows very compact sets.
Table 1.
June 2012
This is information on a product in full production.
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ContentsTDA7384A
Contents
12
Block and pin connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.12.22.32.42.5
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6PCB and component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.13.23.3
SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Standby and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
45
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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TDA7384AList of tables
List of tables
Table 1.Table 2.Table 3.Table 4.Table 5.
Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Absolute maximum ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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List of figuresTDA7384A
List of figures
Figure 1.Figure 2.Figure 3.Figure 4.Figure 5.Figure 6.Figure 7.Figure 8.Figure 9.Figure 10.Figure 11.Figure 12.Figure 13.Figure 14.
Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Standard test and application circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Components and top copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Bottom copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Quiescent current vs. supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Output power vs. supply voltage (4Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Distortion vs. output power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Supply voltage rejection vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Power dissipation and efficiency vs. output power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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TDA7384ABlock and pin connection diagrams
1 Block and pin connection diagrams
Figure 1.Block diagram6CC34\"9-54%).M&.#/54/5407'.$/54).M&/5407'.$/54).M&/5407'.$/54).M&!#'.$M&362M&'!0'036CCM&N&/5407'.$4!\"3'.$Figure 2.Pin connection0'.$/54/54/54/54-54%0'.$0'.$0'.$6##/54/543'.$/54/543626##).).).).!#'.$34\"9.#4!\"'!0'03Doc ID 4060 Rev 55/14
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Electrical specificationsTDA7384A
2 Electrical specifications
2.1
Absolute maximum ratings
Table 2.
SymbolVSVS (DC)VS (pk)IOPtotTjTstg
Absolute maximum ratings
Parameter
Operating supply voltageDC supply voltage
Peak supply voltage (t = 50 ms)Output peak current:
Repetitive (duty cycle 10 % at f = 10 Hz)Non repetitive (t = 100 μs)Power dissipation, (Tcase = 70 °C)Junction temperatureStorage temperature
Value1828504.55.580150– 55 to 150
UnitVVVAAW°C°C
2.2 Thermal data
Table 3.
SymbolRth j-case
Thermal data
Parameter
Thermal resistance junction-to-case
max.
Value1
Unit°C/W
2.3 Electrical characteristics
VS = 14.4 V; f = 1 kHz; Rg = 600 Ω; RL = 4 Ω; Tamb = 25 °C; Refer to the test and application
diagram (Figure3), unless otherwise specified.
Table 4.
SymbolIq1VOSdVOSGvΔGvPoPo maxElectrical characteristics
Parameter
Quiescent currentOutput offset voltage
RL = ∞Play mode
Test condition
Min.120--8025-242038-Typ.190--26-27224246
Max.350±100+8027±1---UnitmAmVmVdBdBWWW
During mute ON/OFF output
ITU R-ARM weighted
offset voltageVoltage gain
Channel gain unbalanceOutput powerMax. output power(1)
--THD = 10%; VS = 14.4VTHD = 10%; VS = 13.2VVS = 14.4VVS = 15.2V
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TDA7384ATable 4.
SymbolTHDeNoSVRfchRiCTISBIpin4VSB outVSB INAMVM outVM inElectrical specifications
Electrical characteristics (continued)
Parameter
DistortionOutput noise
Supply voltage rejectionHigh cut-off frequencyInput ImpedanceCross talkStandby current consumptionStandby pin current Standby out threshold voltage
f = 1 kHz; Po = 4 Wf = 10 kHz; Po = 4 WVSt-by = 0 VVSt-by = 1.2 to 2.6 V(Amp: ON)Po = 4W\"A\" WeightedBw = 20 Hz to 20 kHzf = 100 Hz; Vr = 1 VrmsPo = 0.5 W
Test condition
Min.---50100706050--3.5-803.5-Typ.0.045070652001007060----90--Max.0.1570100-----20±1-1.5--1.56.5
7.6
5
11
8.520
µAUnit%μVμVdBKHzKΩdBdBµAµAVVdBVV
Standby in threshold voltage(Amp: OFF)Mute attenuation
Mute out threshold voltageMute in threshold voltage
POref = 4 W(Amp: Play)(Amp: Mute)
(Amp: Mute); Att ≥ 80 dB;POref = 4 W
(Amp: Play); Att < 0.1 dB;PO = 0.5 WVMUTE = 1.2 V(Source current)
VAM inVS automute threshold
-V
Ipin22Muting pin current
1.Saturated square wave output.
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Electrical specifications
Figure 3.Standard test and application circuit#M&#M&6CC234\"9+-54%2+#).M&).#M&).#M&).#M&3'.$#M&362#M&.#4!\"#M&#M&6CC/54/54/54/54TDA7384A
'!0'032.4 PCB and component layout
Referred to Figure3: Standard test and application circuit.Figure 4.
Components and top copper layer
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TDA7384A
Figure 5.
Bottom copper layer
Electrical specifications
2.5
Figure 6.
Electrical characteristic curves
Quiescent current vs. supply voltage
Figure 7.
Quiescent current vs. supply current
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Electrical specificationsTDA7384A
Figure 8.
Output power vs. supply voltage (4Ω)
Figure 9.
Distortion vs. output power
Figure 10.Distortion vs. frequency
Figure 11.Supply voltage rejection vs.
frequency
Figure 12.Output noise vs. source resistanceFigure 13.Power dissipation and efficiency
vs. output power
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TDA7384AApplication hints
3 Application hints
Referred to the circuit of Figure3.
3.1 SVR
Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF
time sequence and, consequently, plays an essential role in the pop optimization during ON/OFF transients.
To conveniently serve both needs, its minimum recommended value is 10µf.
3.2 Input stage
The TDA7384A’s inputs are ground-compatible and can stand very high input signals
(± 8 Vpk) without any performances degradation.
If the standard value for the input capacitors (0.1 µF) is adopted, the low frequency cut-off will amount to 16 Hz.
3.3 Standby and muting
If standby and muting are not used, a straight connection to VS of their respective pins
would be admissible.
Conventional/low-power transistors can be employed to drive muting and stand-by pins in absence of true CMOS ports or microprocessors. R-C cells have always to be used in order to smooth down the transitions for preventing any audible transient noises.
Since a DC current of about 10 µA normally flows out of pin 22, the maximum allowable muting-series resistance (R2) is 70 kΩ, which is sufficiently high to permit a muting capacitor reasonably small (about 1µF).
If R2 is higher than recommended, the involved risk will be that the voltage at pin 23 may rise to above the 1.5 V threshold voltage and the device will consequently fail to turn OFF when the mute line is brought down.
About the stand-by, the time constant to be assigned in order to obtain a virtually pop-free transition has to be slower than 2.5 V/ms.
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Package informationTDA7384A
4 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com.ECOPACK® is an ST trademark.
Figure 14.Flexiwatt25 mechanical data and package dimensions$)-!\"#$%&''((((,,,,,,--./222226666-).MM490-!8-).INCH490-!8/54,).%!.$-%#(!.)#!,$!4!7\\S7\\S7\\S7\\S&LEXIWATTVERTICALDAMBARPROTUSIONNOTINCLUDEDMOLDINGPROTUSIONINCLUDED6#\"((((22622,,6!6,/,.,66$22%''&2,20IN--'!0'0312/14Doc ID 4060 Rev 5
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TDA7384ARevision history
5 Revision history
Table 5.
Date05-Dec-200111-Dec-200710-Oct-200807-Jun-201220-Jun-2012
Document revision history
Revision
12345
Initial release.
Updated in the Table4 the values of the parameters Po and Po max.Updated Table3: Thermal data on page6.Updated Features on page1;
Updated Electrical characteristics on page6.Updated Section3.3: Standby and muting.
Changes
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TDA7384A
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