Datasheet TDA7496SA Datasheet (ST)

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Page 1

5W+5W AMPLIFIER WITH DC VOLUME CONTROL

■ 5+5W OUTPUT POWER

= 8Ω @THD = 10% VCC = 22V

■ ST-BY AND MUTE FUNCTIONS

■ LOW TURN-ON TURN-OFF POP NOISE

■ LINEAR VOLUME CONTROL DC COUPLED

WITH POWER OP. AMP.

■ NO BOUCHEROT CELL

■ NO ST_BY RC INPUT NETWORK

■ SINGLE SUPPLY RANGING UP TO 35V

■ SHORT CIRCUIT PROTECTION

■ THERMAL OVERLOAD PROTECTION

■ INTERNALLY FIXED GAIN

■ SOFT CLIPPING

■ VARIABLE OUTPUT AFTER VOLUME

CONTROL CIRCUIT

■ CLIPWA TT 1 5 P A C KA GE

DESCRIPTION

The TDA7496SA is a stereo 5+5W class AB power

TDA7496SA

PRODUCT PREVIEW

MULTIPOWER BI50II TECHNOLOGY

Clipwatt 15

ORDERING NUMBER: TDA7496SA

amplifier assembled i the @Clipwatt 15 package, specially designed for high quality sound TV applications.

Features of the TDA7496SA include linear volume control Stand-by and Mute functions.

The TDA7496SA is pin to pin compatible with TDA7496, TDA7496S, TDA7496SA, TDA7495, TDA7495SA, TDA7494S, TDA7494SA.

BLOCK DIAGRAM

VAROUT_R

PW_GND

INR

470nF

INL

470nF

470µF

S_GND

SVR 7

VOLUME

30K

VOLUME

100nF

VAROUT_L

300K

September 2003

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

OP AMP

MUTE/STBY

PROTECTIONS

-30K OP AMP

+5V

60K

D96AU440D

PW_GND

1000µF

OUTR

STBY

MUTE

OUTL

1000µF

10K

1µF

S1 ST-BY

S2 MUTE

+5V

S_GND

+5V

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TDA7496SA

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V P

stg,TJ

IN tot

amb

DC Supply Voltage 35 V

Maximum Input Voltage 8 Vpp Total Power Dissipation (T

= 70°C) 16 W

amb

Ambient Operating Temperature (1) 0 to 70 °C Storage and Junction Temperature -40 to 150 °C Volume Control DC Voltage 7 V

PIN CONNECTION

(top view)

D03AU1505

PW_GND OUTR V

OUTL PW_GND MUTE STBY S_GND SVR N.C. INL VAROUT_L VOLUME VAROUT_R INR

15 14 13 12 11 10

9 8 7 6 5 4 3 2 1

THERMAL DATA

Symbol Parameter Value Unit

th j-case

th j-amb

ELECTRICAL CHARACTERISTCS

(Refer to the test circuit R

Symbol Parameter Test Condition Min. Typ. Max. Unit

DCV

Thermal Resistance junction-case Typ. = 4.5; Max. = 5 °C/W Thermal Resistance junction-ambient Max. 48 °C/W

= 8Ω, f = 1KHz, Rg = 50Ω, VS = 22V, T

Supply Voltage Range 10 32 V Total Quiescent Current 25 50 mA

Output DC Offset Referred to SVR

No Input Signal 200 mV

Potential Quiescent Output Voltage 11

Output Power THD = 10%; RL = 8Ω;

THD = 1%; RL = 8Ω;

amb

= 25°C)

55.5 4

2/13

THD

Total Harmonic Distortion

THD = 10%; R THD = 1%; R

= 4Ω; VS = 12V

Gv = 30dB; PO = 1W; f = 1KHz

2.1

1.0

0.4

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TDA7496SA

ELECTRICAL CHARACTERISTCS

(Refer to the test circuit R

= 8Ω, f = 1KHz, Rg = 50Ω, VS = 22V, T

(continued)

amb

= 25°C)

Symbol Parameter Test Condition Min. Typ. Max. Unit

peak

VLine

Min VOL

Output Peak Current (internally limited) 1.0 1.3 A Input Signal 2.8 Vrms

Closed Loop Gain V

Monitor Out Gain V Attenuation at Minimum Volume V

>4.5V 28.5 30 31.5 dB

Ol Ctrl

>4.5V; Zload >30KΩ -1.5 0 1.5 dB

Ol Ctrl

<0.5V 80 dB

Ol Ctrl

BW 0.6 MHz

Total Output Noise f = 20Hz to 22KHz

500 800 µV

PLAY, max volume f = 20Hz to 22KHz

100 250 µV

PLAY, max attenuation f = 20Hz to 22KHz MUTE 60 150 µV

SR Slew Rate 5 8

Input Resistance 22.5 30 KΩ

Var Out

L Var Out

SVR Supply Voltage Rejection f = 1KHz; max volume

Variable Output Resistance 30 100 Ω Variable Output Load 2 KΩ

35 39 dB

= 470µF; V

SVR

f = 1KHz; max attenuation

= 470µF; V

SVR

Thermal Muting 150 °C

Thermal Shut-down 160 °C

= 1Vrms

RIP

= 1Vrms

RIP

55 65 dB

MUTE & INPUT SELECTION FUNCTIONS

ST-ON

ST-OFF

MUTEON

MUTEOFF

MUTE

qST-BY

stbyBIAS

Stand-by ON Threshold 3.5 V Stand-by OFF Threshold 1.5 V Mute ON threshold 3.5 V Mute OFF threshold 1.5 V Mute Attenuation 50 65 dB Quiescent Current @ Stand-by 0.6 1 mA Stand-by bias current Stand by ON: V

= 5V

mute

ST-BY

= 5V;

80 µA

Play or Mute -20 -5 µA

muteBIAS

Mute Bias Current Mute 1 5 µA

Play 0.2 2 µA

V/µs

3/13

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TDA7496SA

APPLICATION SUGGESTIONS

The recommended values of the external components are those shown on the application circuit of figure 1. Different values can be used, the following table can help the designer.

COMPONENT

SUGGESTION

VALUE

PURPOSE

R1 300K Volume Control Circuit Larger volume regulation

R2 10K Mute time constant Larger mute on/off time Smaller mute on/off time

P1 50K Volume Control Circuit C1 1000µF Supply voltage bypass Danger of oscillation C2 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C3 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C4 470µF Ripple rejection Better SVR Worse SVR C5 100nF Volume control time

constant C6 1000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C7 1µF Mute time constant Larger mute on/off time Smaller mute on/off time C8 1000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C9 100nF Supply voltage bypass Danger of oscillation

LARGER THAN

SUGGESTION

time

Larger volume regulation time

SMALLER THAN

SUGGESTION

Smaller volume regulation time

Figure 1. Application Circui

INR

INL

C4 470µF

1000µF

PW_GND

C2 470nF

S_GND

C3 470nF

SVR 7

30K

VOLUME

100nF

VAROUT_R

VOLUME

VAROUT_L

R1 300K

TP1

OP AMP

MUTE/STBY

PROTECTIONS

-30K OP AMP

VOL

P1 50K LOG

0.1µF

PW_GND

+5V

C8 1000µF

1µF

C6 1000µF

R2 10K

PW_GND OUTR

OUTL PW_GND

D96AU493D

S1 STBY

S2 MUTE

+5V

S_GND

+5V

4/13

Page 5

MUTE STAND-BY TRUTH TABLE

MUTE St-BY OPERATING CONDITION

H H STAND-BY

L H STAND-BY

H L MUTE

LLPLAY

Turn ON/OFF Sequences (for optimizing the POP performances)

Figure 1. USING ONLY THE MUTE FUNCTION

VS (V)

ST-BY

pin#9 (V)

SVR

pin#7(V)

TDA7496SA

2.5V

MUTE

pin#10 (V)

INPUT

(mV)

OUT

(V)

(mA)

D97AU684

OFFSTBY MUTE PLAY STBYOFF MUTE

USING ONLY THE MUTE FUNCTION

To semplify the application, the stand-by pin can be connected directly to Ground. During the ON/OFF transitions is recommended to respect the following conditions:

– At the turn-on the transition mute to mute - play must be made when the SVR pin is higher than 2.5V – At the turn-of f the TDA 7496A must be brough t to mut e from t he pl ay condi tion when the SVR pin is

higher than 2.5V.

5/13

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TDA7496SA

Figure 2. P.C.B. and Component layoutPCB and Component Layout

Figure 3.

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TDA7496SA

Figure 4. Quiescent Current vs. Supply Voltage

(mA)

30 28

Vi=0

26 24 22 20 18

10 12 14 16 18 20 22 24 26 28 30 32

Supply Voltage (V)

D03AU1494

Figure 5. Output Dc Offset vs. Supply Voltage

Vodc

(V)

16 15

Vi=0

14 13 12 11 10

9 8 7 6 5 4

10 12 14 16 18 20 22 24 26 28 30 32

Supply Voltage (V)

D03AU1495

Figure 7. Output DC Offset vs. Supply Voltage

Vodc-Vsvr

(mV)

280 260 240 220 200 180 160 140 120 100

Vi=0

10 12 14 16 18 20 22 24 26 28 30 32

Supply Voltage (V)

D03AU1496/mod

Figure 8. Out put P ower vs Supply V ol ta ge

Output Power

(W)

3.2

2.8

2.4

2.0

1.6

1.2

0.8

0.4 0

10 10.5 11 11.5 12 12.5 13 13.5 14

Rl=4Ω F=1KHz

Supply Voltage (V)

D03AU1498

THD=10%

THD=1%

Figure 6. Output Power vs. Supply Voltage

Output Power

(W)

8 7 6 5 4 3 2 1 0

Rl=8Ω F=1KHz

THD=10%

10 12 14 16 18 20 22 24 26

Supply Voltage (V)

D03AU1497

THD=1%

Figure 9. Disto rti on v s Output Pow er

Distortion

(%)

Vs=22V Rl=8Ω

F=15KHz

0.1

F=1KHz

0.01 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

Output Power (W)

D03AU1499

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TDA7496SA

Figure 10. Distortion vs Output Power

Distortion

(%)

F=15KHz

0.1 F=1KHz

0.01 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Output Power (W)

D03AU1500

Vs=12V Rl=4Ω

Figure 11. Closed Loop Gain vs. Frequency

Closed loop

Gain

(dB)

30 28

26 24 22

0.02 0.2 2 20 Frequency (KHz)

D03AU1501

Rl=8Ω Pout=0.5W Cin=470nF Cout=1000µF Csvr=470µF

Figure 13. Mute Attenuation vs Vpin 10

Mute Attenuation

(dB)

-20

-40

-60

-80

-100

-120

Rl=8Ω 0dB @ Pout=1W

0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2

Vpin # 10 (V)

PINS DESCRIPTION Figure 14. PIN SVR

20K

SVR

20K

30K

D03AU1503

OUT L

OUT R

Figure 12. St-By Attenuation vs Vpin 9

St-by Attenuation

(dB)

-20

-40

-60

-80

-100

-120

-140

8/13

Rl=8Ω 0dB @ Pout=1W

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

Vpin # 9 (V)

D03AU1502

Figure 15.

PINS:

INn

SVR

100µA

INL,INR

30K

D97AU589

D97AU585A

500µA

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TDA7496SA

Figure 17. PIN ST-BY

STBY

200

65K

D97AU594

Figure 18. PIN: MUTE

200MUTE

10K

50µA

D97AU592

Figure 19. PINS: OUT R, OUT L

Figure 20. PINS: VAROUT-L VAROUT-R

10µA

VAROUT-L

D97AU590

Figure 21. PIN: VOLUME

10µA

VOL

D97AU591

Figure 22. PINS: PW-GND, S-GND

D97AU588

OUT

GND

D97AU59

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TDA7496SA

HEAT SINK DIMENSIONING:

In order to avoid the thermal protection intervention, that is placed approximati vely at Tj = 150°C, it is important the dimensioning of the Heat Sinker R

The parameters that influence the dimensioning are: – Maximum dissipa ted power for the device (P – Max thermal resistance Junction to case (R

– Max. ambient temperature T

amb max

– Quiescent current Iq (mA)

Example:

= 22V, R

= (N° channels) ·

dmax

= 2 · ( 3.0 ) + 0.5 = 6.5 W

dmax

(Heat Sinker)

= 8ohm, R

load

Th c-a

= 5 °C/W , T

Th j-c

------------------------------ I 2Π2R

⋅

load

150 T

–

----------------------------------------- R

d max

qVcc

amb max

(°C/W).

amb max

⋅+

–

Th j-c

)

dmax

)

Th j-c

= 50°C

150 50–

---------------------- 5.0– 10°C/W===

6.5

In figure 23 is shown the Power derating curve for the device.

Figure 23. Power derating curve

(a)

Pd (W)

(c)

0 40 80 120 160

(c)

(b)

Tamb (°C)

a) Infinite Heatsink

a) Infinite Heatsink b) 7 °C/ W

b) 7 °C/ W c) 10 °C/ W

c) 10 °C/ W

10/13

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TDA7496SA

Clipwatt Assembling Suggestions

The suggested mounting method of Clipwatt on external heat sink, requires the use of a clip placed as much as possible in the plastic body center, as indicated in the example of figure 24.

A thermal grease can be used in order to reduce the additio nal thermal resistance of the contact betw een package and heatsink.

A pressing force of 7 - 10 Kg gives a good contact and the clip mus t be designed in order to avoid a maxi mum contact pressure of 15 Kg/mm2 between it and the plastic body case.

As example , if a 15Kg force is applied by the clip on the package , the clip must have a contact area of 1mm2 at least.

Figure 24. Example of right placement of the clip

11/13

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TDA7496SA

DIM.

mm inch

MIN. TYP . MAX. MIN. TYP. MAX.

A 3.2 0.126 B 1.05 0.041 C 0.15 0.006 D 1.55 0.061 E 0.49 0.55 0.019 0.022 F 0.67 0.73 0.026 0.029

G 1.14 1.27 1.4 0.045 0.050 0.055 G1 17.57 17.78 17.91 0.692 0.700 0.705 H1 12 0.480 H2 18.6 0.732 H3 19.85 0.781

L 17.95 0.707 L1 14.45 0.569 L2 10.7 11 11.2 0.421 0.433 0.441 L3 5.5 0.217

M 2.54 0.100

M1 2.54 0.100

OUTLINE AN D

MECHAN ICAL DATA

Weight:

1.92gr

Clipwatt15

12/13

0044538

Page 13

TDA7496SA

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 implic ation or otherwise under any patent or patent r i ght s of STMi croelectr oni cs. Spec i fications mentioned i n this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics product s are not authorized for use as cri tical comp onents in lif e support devi ces or systems without express written approva l of STMicroel ectronics.

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