ST TDA7498E User Manual

TDA7498E

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

Features

■160-W + 160-W output power at

THD = 10% with RL = 4 Ω and VCC = 36 V

■1 x 220 W output power mono parallel BTL at THD = 10% with RL = 3 Ω and VCC = 36 V

■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

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		www.st.com
change without notice.

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 RL = 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

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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

2.1Pinout

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

36 VSS

35 SVCC

34 VREF

33 INNB

32 INPB

31 MODE

30 GAIN

29 SVR

28 DIAG

27 SGND

26 VDDS

25 SYNCLK

24 ROSC

23 INNA

22 INPA

21 MUTE

20 STBY

19 VDDPW

EP, exposed pad

Connect to ground

SUB_GND 1

OUTPB 2

OUTPB 3

PGNDB 4

PGNDB 5

PVCCB 6

PVCCB 7

OUTNB 8

OUTNB 9

OUTNA 10

OUTNA 11 PVCCA 12 PVCCA 13

PGNDA 14 PGNDA 15

OUTPA 16 OUTPA 17 PGND 18

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Pin description	TDA7498E

2.2Pin 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

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