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TDA7388中文资料

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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

TDA7388

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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.

The ST logo is a registered trademark of STMicroelectronics.

All other names are the property of their respective owners

? 2005 STMicroelectronics - All rights reserved

STMicroelectronics group of companies

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