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TDA7388
July 2005
1
FEATURES
■HIGH OUTPUT POWER CAPABILITY:■4 x 41W/4? MAX.
■4 x 25W/4? @ 14.4V, 1KHz, 10%■LOW DISTORTION ■LOW OUTPUT NOISE ■ST-BY FUNCTION ■MUTE FUNCTION
■
AUTOMUTE AT MIN. SUPPLY VOLTAGE DETECTION
■
LOW EXTERNAL COMPONENT COUNT:–INTERNALLY FIXED GAIN (26dB)–NO EXTERNAL COMPENSATION –NO BOOTSTRAP CAPACITORS
2
PROTECTIONS:
■
OUTPUT SHORT CIRCUIT TO GND, TO V S , ACROSS THE LOAD
■VERY INDUCTIVE LOADS
■
OVERRATING CHIP TEMPERATURE WITH SOFT THERMAL LIMITER ■LOAD DUMP VOLTAGE ■
FORTUITOUS OPEN GND
■REVERSED BATTERY ■
ESD
3DESCRIPTION
The TDA7388 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for high end car radio applications.
Thanks to the fully complementary PNP/NPN out-put configuration the TDA7388 allows a rail to rail output voltage swing with no need of bootstrap ca-pacitors. The extremely reduced components count allows very compact sets.
4 X 41W QUAD BRIDGE CAR RADIO AMPLIFIER
Figure 2. Block and Application Diagram
Rev. 1Figure 1. Package
Table 1. Order Codes
Part Number Package TDA7388
Flexiwatt25
TDA7388
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Table 2. Absolute Maximum Ratings
Figure 3. Pin Connection
Table 3. Thermal Data
Symbol Parameter
Value Unit V CC Operating Supply Voltage 18V V CC (DC)DC Supply Voltage
28V V CC (pk)
Peak Supply Voltage (t = 50ms)50V I O
Output Peak Current:
Repetitive (Duty Cycle 10% at f = 10Hz)Non Repetitive (t = 100μs) 4.55.5A A P tot Power dissipation, (T case = 70°C)80W T j Junction Temperature 150°C T stg
Storage Temperature
– 55 to 150
°C
Symbol Parameter
Value Unit R th j-amb
Thermal Resistance Junction to Case
max
1
°C/W
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TDA7388
Table 4. Electrical Characteristcs (V S = 14.4V; f = 1KHz; R g = 600?; R L = 4?;T amb = 25°C; Refer to the Test and application diagram, unless otherwise specified .)(*) Saturated square wave output.(
Symbol
Parameter
Test Condition Min.
Typ.
Max.
Unit
I q1Quiescent Current R L = ∞
120
190
350mA V OS Output Offset Voltage Play Mode
±80mV ?V OS During Mute ON/OFF Output Offset Voltage ±80
mV G v Voltage Gain 25
2627
dB P o Output Power THD = 10%; V S = 14.4V 2226W P o max Max.Output Power (*)V S = 14.4V 38
41W
THD Distortion P o = 4W 0.040.15%e No
Output Noise
"A" Weighted 5070μV Bw = 20Hz to 20KHz
70
100
μV SVR Supply Voltage Rejection f = 100Hz; V r = 1V rms 5065dB f ch High Cut-Off Frequency P o = 0.5W
100200KHz R i Input Impedance 70
100K ?C T
Cross T alk
f = 1KHz; Po = 4W 6070dB f = 10KHz; Po = 4W
50
60
dB
I SB St-By Current Consumption 50
μA V SB out St-By OUT Threshold Voltage
(Amp: ON) 3.5
V
V SB IN St-By IN Threshold Voltage (Amp: OFF) 1.5V A M Mute Attenuation
P Oref = 4W
8090
dB V M out Mute OUT Threshold Voltage (Amp: Play) 3.5
V
V M in Mute IN Threshold Voltage (Amp: Mute)
1.5
V V AM in V S Automute Threshold (Amp: Mute); Att ≥ 80dB; P Oref = 4?(Amp: Play); Att < 0.1dB; P O = 0.5?7.6
6.58.5V V I pin22
Muting Pin Current
V MUTE = 1.5V (Source Current)
5
11
20
μA
TDA7388
Figure 4. Standard Test and Application Circuit
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TDA7388
4P.C.B. AND COMPONENT LAYOUT OF THE FIGURE 4
Figure 5. Components & Top Copper Layer
Figure 6. Bottom Copper Layer
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Figure 7. Quiescent Current vs. Supply Voltage
Figure 8. Quiescent Output Voltage Supply
Voltage
Figure 9. Output Power vs. Supply Voltage
Figure 10. Distortion vs. Output Power
Figure 11. Distortion vs. Frequency
Figure 12. Supply Voltage Rejection vs.
Frequency.
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TDA7388
Figure 13. Output Noise vs. Source
Resistance.
Figure 14. Power Dissipation & Efficiency vs.
Output Power.
TDA7388
Figure 15. Flexiwatt 25 Mechanical Data & Package Dimensions
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TDA7388 6REVISION HISTORY
Table 5. Revision History
Date Revision Description of Changes
July 20051First Issue
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TDA7388
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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All other names are the property of their respective owners
? 2005 STMicroelectronics - All rights reserved
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