ST TDA7386 User Manual

TDA7386

4 x 45 W quad bridge car radio amplifier

Features

■High output power capability:

■4 x 45W/4Ω max.

■4 x 28W/4Ω @ 14.4V, 1KHz, 10%

■4 x 24W/4Ω @ 13.2V, 1KHz, 10%

■Low distortion

■Low output noise

■Standby function

■Mute function

■Automute at min. supply voltage detection

■Low external component count:

–Internally fixed gain (26dB)

–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

Table 1. Device summary

Flexiwatt25

■Load dump voltage

■Fortuitous open GND

■Reversed battery

■ESD

Description

The TDA7386 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 TDA7386 allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced boundary components count allows very compact sets.

Order code	Package	Packing
TDA7386	Flexiwatt25	Tube

November 2008

Rev 4

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www.st.com

Contents	TDA7386

Contents

1	Block and pin connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 5
2	Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
	2.1	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
	2.2	Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
	2.3	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
	2.4	PCB and component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
	2.5	Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
3	Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		11
	3.1	SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
	3.2	Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
	3.3	Standby and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
4	Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		12
5	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		13

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TDA7386	List of tables

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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List of figures	TDA7386

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. Standard test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4. Components and top copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 5. Bottom copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 7. Quiescent output voltage vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 8. Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 9. Max. output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 10. Distortion vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 11. Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 12. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 13. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 14. Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 15. Power dissipation and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 16. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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TDA7386	Block and pin connection diagrams

1 Block and pin connection diagrams

Figure 1. Block diagram

Vcc1

Vcc2

2200µF

100nF

ST-BY

MUTE			N.C.
			OUT1+
IN1			OUT1-
0.1µF			PW-GND
			OUT2+
IN2			OUT2-
0.1µF			PW-GND
			OUT3+
IN3			OUT3-
0.1µF			PW-GND
			OUT4+
IN4			OUT4-
0.1µF			PW-GND
AC-GND	SVR	TAB	S-GND
0.47µF	47µF

D99AU1018A

Figure 2. Pin connection (top view)

1

25

TAB

P-GND2

OUT2-

ST-BY

OUT2+

CC

OUT1-

P-GND1

OUT1+

SVR

IN1

IN2

S-GND

IN4

IN3

AC-GND

OUT3+

P-GND3

OUT3-

CC

OUT4+ MUTE OUT4-

P-GND4

N.C.

V

V

D94AU159B

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