ST TDA7498E User Manual

160-watt + 160-watt dual BTL class-D audio amplifier

Features

■ 160-W + 160-W output power at

THD = 10% with R

■ 1 x 220 W output power mono parallel BTL at

THD = 10% with R

■ Wide-range single-supply operation (14 - 36 V)

■ High efficiency (η = 85%)

■ Parallel BTL function using the MODE pin

■ Four selectable, fixed gain settings of

nominally 23.8 dB, 29.8 dB, 33.3 dB and

35.8 dB

■ Differential inputs minimize common-mode

noise

■ Standby and mute features

■ Smart protection

■ Thermal overload protection

■ Small offset less than 20 mV

= 4 Ω and V

= 3 Ω and V

= 36 V

TDA7498E

Preliminary data

PowerSSO36

with exposed pad up

Description

The TDA7498E is a dual BTL class-D audio amplifier with a single power supply designed for home systems and active speaker applications.

It comes in a 36-pin PowerSSO package with exposed pad up (EPU) to facilitate mounting a separate heatsink.

Table 1. Device summary

Order code Operating temp. range Package Packaging

TDA7498E 0 to 70 °C PowerSSO36 (EPU) Tube

TDA7498ETR 0 to 70 °C PowerSSO36 (EPU) Tape and reel

December 2011 Doc ID 022595 Rev 1 1/20

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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Contents TDA7498E

Contents

1 Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1 For RL = 4 Ω, stereo configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2 For R

= 3 Ω, mono BTL configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.1 Stereo and mono BTL operation selection using the MODE pin . . . . . . . 16

5.2 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.3 Smart protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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TDA7498E List of figures

List of figures

Figure 1. Internal block diagram (showing one channel only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. Pin connections (top view, PCB view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3. Test circuit stereo application and mono BTL mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 4. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 5. THD vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 6. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 7. FFT performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 8. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 9. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 10. THD vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 11. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 12. PowerSSO36 EPU outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Doc ID 022595 Rev 1 3/20

Device block diagram TDA7498E

1 Device block diagram

Figure 1 shows the block diagram of one of the two identical channels of the TDA7498E.

Figure 1. Internal block diagram (showing one channel only)

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TDA7498E Pin description

2 Pin description

2.1 Pinout

Figure 2. Pin connections (top view, PCB view)

VSS

SVCC

VREF

INNB

INPB

MODE

GAIN

SVR

DIAG

SGND

VDDS

SYNCLK

ROSC

SUB_GND

OUTPB

PGNDB

PVCCB

OUTNB

OUTNA

PVCCA

INNA

INPA

MUTE

STBY

VDDPW

PGNDA

EP, exposed pad

Connect to ground

Doc ID 022595 Rev 1 5/20

PGNDA

OUTPA

PGND

Pin description TDA7498E

2.2 Pin list

Table 2. Pin description list

Number Name Type Description

1 SUB_GND PWR Connect to the frame

2,3 OUTPB O Positive PWM for right channel

4,5 PGNDB PWR Power stage ground for right channel

6,7 PVCCB PWR Power supply for right channel

8,9 OUTNB O Negative PWM output for right channel

10,11 OUTNA O Negative PWM output for left channel

12,13 PVCCA PWR Power supply for left channel

14,15 PGNDA PWR Power stage ground for left channel

16,17 OUTPA O Positive PWM output for left channel

18 PGND PWR Power stage ground

19 VDDPW O

3.3-V (nominal) regulator output referred to ground for power stage

20 STBY I Standby mode control

21 MUTE I Mute mode control

22 INPA I Positive differential input of left channel

23 INNA I Negative differential input of left channel

24 ROSC O Master oscillator frequency-setting pin

25 SYNCLK I/O Clock in/out for external oscillator

26 VDDS O

3.3-V (nominal) regulator output referred to ground for signal blocks

27 SGND PWR Signal ground

28 DIAG O Open-drain diagnostic output

29 SVR O Supply voltage rejection

30 GAIN I Gain setting input

31 MODE I Enables stereo or mono BTL mode of operation

32 INPB I Positive differential input of right channel

33 INNB I Negative differential input of right channel

34 VREF O Half VDDS (nominal) referred to ground

35 SVCC PWR Signal power supply

36 VSS O 3.3-V (nominal) regulator output referred to power supply

- EP - Exposed pad for heatsink, to be connected to ground

6/20 Doc ID 022595 Rev 1

+ 14 hidden pages