SGS Thomson Microelectronics TDA7454 Datasheet

TDA7454

4 x 35W HIGH EFFICIENCY QUAD BRIDGE

CAR RADIO AMPLIFIER

HIGHOUTPUTPOWERCAPABILITY: 4 x40W/4Ω MAX. 4 x35W/4ΩEIAJ. 4 x25W/4Ω@14.4V,1KHz, 10% 4 x60W/2Ω MAX.

2Ω DRIVINGCAPABILITY DUAL MODE OPERATING EXTERNALLY

PRESETTABLE: CONVENTIONAL CLASS AB MODE,HIGH EFFICIENCYMODE

LOW EXTERNAL COMPONENTSCOUNT: – NO BOOTSTRAPCAPACITORS – NO EXTERNALCOMPENSATION – INTERNALLYFIXED GAIN (26dB)

CLIPPINGDETECTOR ST-BYFUNCTION (CMOS COMPATIBLE) MUTEFUNCTION (CMOS COMPATIBLE) AUTOMUTEAT MINIMUMSUPPLY

VOLTAGEDETECTION LOW RADIATION

Protections:

OUPUTSHORTCIRCUIT TO GND; TO V

; ACROSSTHE LOAD

S

3 STEPS OVERRATING CHIP TEMPERATURE WITH THERMAL WARNING

LOADDUMP VOLTAGE FORTUITOUSOPEN GND

BLOCK & APPLICATIONDIAGRAM

MULTIPOWER BCD TECHNOLOGY

Flexiwatt 25

LOUDSPEAKERDC CURRENT ESD

DESCRIPTION

The TD A7454 is a new BCD technology QUAD BRIDGE type of car radio amplifier in Flexiwatt25 packagespeciallyintendedforcarradioapplications. Among the features, its superior efficiency performance coming from the internal exclusive structure, makes it the most suitable device to simplify the thermal management in high power sets. The dissipated output power under average listening condition is in fact reduced up to 50% when compared to the level provided by conventional class AB solutions.

October 1999

STD/HI- EFF 16

RIGHT

IN

FRONT

ST-BY 4

IN

RIGHT

REAR

MUTE 22

IN LEFT

FRONT

IN LEFT

REAR

CD 25

0.22µF

100µF

0.22µF

SVR

V

CC1

6

20

V

CC2

7

11

12

15

10

14

8

9

S-GND

13

5

2

3

19

18

17

TAB

1

21

24

23

D94AU172C

-

RIGHT FRONT

+

RIGHT REAR

-

LEFT FRONT

+

LEFT REAR

-

V

CC

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TDA7454

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

op

V

peak

I

O

I

O

P

tot

T

stg,Tj

THERMAL DATA

Symbol Description Value Unit

R

th j-case

Operating Supply Voltage 18 V DC Supply Voltage 28 V

S

Peak Supply Voltage (for t = 50ms) 40 V Output Peak Current (not repetitive t = 100µs) 8 A Output Peak Current (repetitive f > 10Hz) 6 A Power Dissipation T

=70°C86W

case

Storage and Junction Temperature -55 to 150

Thermal Resistance Junction-case Max 1

°

C/W

°

C

PIN CONNECTION (Topview)

25 24 23 22

20 19 18 17 16 15 14

13 12 11 10

9 8

7 6

4 3 2 1

CD PW GND LR OUT LRMUTE OUT LR+ V

CC2

OUT LFPW GND LF OUT LF+ STD/HEFF IN LF IN LR S GND IN RR IN RF SVR OUT RF+ PW GND RF OUT RFV

CC1

OUT RR+ ST-BY OUT RRPW GND RR TAB

D94AU173A

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TDA7454

ELECTRICALCHARACTERISTICS(Refer to the test circuit VS=14.4V; RL=4Ω; f = 1KHz;

T

=25°C,unless otherwise specified

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

I

d

P

o

Supply Voltage Range 8 18 V Total Quiescent Drain Current 60 140 250 mA Output Power THD = 10%

THD = 1%

23 18

25 20

W W

THD = 10% RL = 2Ω;

P

o EIAJ

THD = 1% R

EIAJ Output Power (*) Vs = 13.7V

=2Ω;

L

Vs = 13.7V, RL = 2Ω

P

o max.

Max. Output Power (*) Vs = 14.4V

Vs = 14.4V, RL = 2

THD Total harmonic distortion P

C

T

R

IN

G

V

G

∆

E

IN

Cross Talk f = 1KHz to 10KHz 45 55 dB Input Impedance 11 15 19 KΩ Voltage Gain 25 26 27 dB Voltage Gain Match 1 dB

V

Output Noise Voltage Rg= 600

= 1W to 10W; STD MODE

O

P

= 1W;HE MODE

O

P

= 10W; HE MODE

O

=2Ω; HE MODE; PO =3W

R

L

R

=2Ω; HE MODE; PO= 15W

L

Ω

SVR Supply Voltage Rejection f = 300Hz; Vr = 1Vrms;

R

= 0 to 100Ω;

g

40 28

32 50

38

Ω

55

45 52 dB

42 30

35 52

40 60

0.03

0.04

0.1

0.06

0.15

0.3

0.5

0.3

0.5

100 150 mV

BW Power Bandwidth (–3dB) 75 KHz A

SB

V

sb IN

V

sb OUT

I

sb

A

M

V

MIN

V

M OUT

I

M

CD Clip Det. out Current

(*) Saturated square wave output.

Stand-by Attenuation 90 100 dB Stand-by in Threshold 1.5 V Stand-by out Threshold 3.5 V Stand-by Current Consumption 100 µA Mute Attenuation 80 90 dB Mute in Thereshold 1.5 V Mute out Threshold 3.5 V Mute pin Current (Sourced) V = 0 to V

V

S max

S

= 18V

Mode Select Switch StandardBTL Mode Op. (V

High Efficiency Mode (V

(Pull up to 5V with 10KΩ)

CD off: P CD on: THD = 5% 150

Omin

= 10W

pin16

pin 16

-10 1 10 µA

) Open

) 0.5 V

W W

% % %

% %

5

A

µ µA

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TDA7454

Figure 1: StandardTest and Application Circuit.

ST-BY

MUTE

IN RF

IN RR

IN LF

IN LR

(*) OPEN = STANDARD BTL

R1

10K

R2

10K

C1

0.22µF

C2 0.22µF

C3 0.22µF

C4 0.22µF

CLOSED=HI-EFF BTL

C6

0.1µF

C7

1µF

S-GND

C8

0.1µF

4

22

11

C9

2200µF

Vcc1 Vcc2

620

TDA7454

12

15

14

13

16 10 25 1

(*)

SW1

SVR TAB

C5

100µF

CLIP DET

9 8 7

5 2 3

17 18 19

21 24 23

OUT RF

OUT RR

OUT LF

OUT LR

D95AU416

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