ST TDA7376PD User Manual

2 x 35 W power amplifier for car radio

Features

■ High output power capability:

– 2 x 40 W max./4 Ω
–2 x 35 W/4 Ω EIAJ
–2 x 25 W/4 Ω @14.4 V, 1 kHz, 10 %
–2 x 25 W/2 Ω @14.4 V, 1 kHz, 10 %

■ 2 Ω driving

■ Differential inputs

■ Minimum external components count

■ Internally fixed gain (26 dB)

■ Mute function (CMOS compatible)

■ Automute at minimum supply voltage detection

■ Standby function

■ No audible pop during mute and standby

operations

■ Clipping detector with programmable distortion

threshold

■ Protections:

– Short circuit (out to ground, out to supply

voltage, across the load)

– Overrating chip temperature with soft

thermal limiter
– Load dump voltage
– Fortuitous open ground
– Loudspeaker DC current
–ESD

Table 1. Device summary

TDA7376PD

PowerSO36 (Slug up)

Description

The TDA7376PD is a new technology dual bridge
audio amplifier in PowerSO36 package designed
for car radio applications.

Thanks to the fully complementary PNP/NPN
output stage configuration the TDA7376PD
delivers a rail-to-rail voltage swing with no need of
bootstrap capacitors.

Differential input pairs, that will accept either
single ended or differential input signals,
guarantee high noise immunity making the device
suitable for both car radio and car boosters
applications.

The audio mute control, that attenuates the output
signal of the audio amplifiers, suppresses pop
on - off transients and cuts any noises coming
from previous stages. The standby control, that
de-biases the amplifiers, reduces the cost of the
power switch. The on-board programmable
distortion detector allows compression facility
whenever the amplifier is overdriven, so limiting
the distortion at any levels inside the presettable
range.

Order code Package Packing

TDA7376PD PowerSO36 Tube

TDA7376PDTR PowerSO36 Tape and reel

December 2009 Doc ID 10260 Rev 3 1/14

www.st.com

1

Contents TDA7376PD

Contents

1 Block and pins 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 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5 Test and application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2/14 Doc ID 10260 Rev 3

TDA7376PD 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

Doc ID 10260 Rev 3 3/14

List of figures TDA7376PD

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. Pins connection diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. Clip detector threshold vs. THD set. voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 5. Output power vs. supply voltage (THD = 1 %) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6. Output power vs. supply voltage (THD = 10 %) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7. EIAJ power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 8. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 9. THD vs. output power (RL = 4 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 10. THD vs. output power (RL = 24 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 11. Dissipated power and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 12. SVR vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 13. CMRR vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 14. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 15. Differential inputs test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 16. Single ended inputs test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 17. Application board reference circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 18. PowerSO36 (slug up) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 12

4/14 Doc ID 10260 Rev 3

TDA7376PD Block and pins connection diagrams

1 Block and pins connection diagrams

Figure 1. Block diagram

Figure 2. Pins connection diagram (top view)

NC

PWGND

PWGND

NC

OUT2+

OUT2+

NC

OUT2-

OUT2-

VCC

VCC

IN2+

IN2-

NC

NC

CD-OUT

THDSET

NC

36

35

34

33

32

31

30

29

28

26

25

23

22

21

20

19

D02AU1348

Doc ID 10260 Rev 3 5/14

1

2

3

4

5

6

7

8

9

1027

11

12

1324

14

15

16

17

18

TAB

TAB

PWGND

PWGND

NC

OUT1+

OUT1+

NC

OUT1-

OUT1-

VCC

VCC

IN1+

IN1-

NC

NC

MUTE

ST-BY

SGND