ST TDA7454 User Manual

TDA7454

4 x 35W HIGH EFFICIENCY QUAD BRIDGE

CAR RADIO AMP LIFIER

HIGH OUTPUT POWER CAPABILITY:
4 x 40W/4Ω MAX.
4 x 35W/4Ω EIAJ.
4 x 25W/4Ω @14.4V, 1KHz, 10%
4 x 60W/2Ω MAX.

2Ω DRIVING CAPABILITY
DUAL MODE OPERATING EXTERNALLY

PRESETTABLE: CONVENTIONAL CLASS A­B MODE, HIGH EFFICIENCY MODE

LOW EXTERNAL COMPONENTS CO UNT:
– NO BOOTSTRAP CAPACITORS
– NO EXTERNAL COMPENSATION
– INTERNALLY FIXED GAIN (26dB)

CLIPPING DETECTOR
ST-BY FUNCTION (CMOS COMPA TIBLE)
MUTE FUNCTION (CMOS COMPAT IBLE)
AUTOMU T E AT MINIM UM SUPPLY

VOLTAGE DETECTION
LOW RADIATION

Protections:

OUPUT SHORT CIRCUIT
TO GND ; TO V

; ACROSS THE LOAD

S

3 STEPS OVERRATING CHIP TEMPERA­TURE WITH THERMAL WARNING

LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND

BLOCK & APPLICATION DIAGRAM

MULTIPOWER BCD TECHNOLOGY

Flexiwatt 25

LOUDSPEAKER DC CURRENT
ESD

DESCRIPTION

The TDA7454 is a new BCD technology QUAD
BRIDGE type of car radio amplifier in Flexiwatt25
package spe cially int ended for c ar radio appli catio ns.
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.

March 2001

STD/HI- EFF 16

IN RIGHT

FRONT

ST-BY 4

IN RIGHT

REAR

MUTE 22

IN LEFT

FRONT

IN LEFT

REAR

CD 25

0.22µF

0.22µF

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

V

peak

I

O

I

O

P

tot

T

stg

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

, TjStorage and Junction Temperature -55 to 150 °C

Thermal Resistance Junction-case Max 1 °C/W

PIN CONNECTION

(Top view)

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

ELECTRICAL CHARACTERISTICS

T

= 25°C, unless otherwise specified

amb

(Refer to the test circuit V

= 14.4V; RL = 4Ω; f = 1KHz;

S

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

I

d

P

o

P

o EIAJ

P

o max.

THD Total harmonic distortion P

C

T

R

IN

G

V

∆G

E

IN

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

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

THD = 1%
THD = 10% RL = 2Ω;

THD = 1% R

EIAJ Output Power (*) Vs = 13.7V

Vs = 13.7V, RL = 2Ω

Max. Output Power (*) Vs = 14.4V

Vs = 14.4V, RL = 2Ω

= 1W to 10W; STD MODE

O

P

= 1W; HE MODE

O

P

= 10W; HE MODE

O

RL = 2Ω; HE MODE; PO = 3W
R

= 2Ω; HE MODE; PO = 15W

L

= 2Ω;

L

23
18

40
28

32
50

38
55

25
20

42
30

35
52

40
60

0.03

0.04

0.1

0.06

0.15
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 = 600Ω 100 150 µV

45 52 dB

= 0 to 100Ω;

R

g

0.3

0.3

0.5

0.3

0.5

BW Power Bandwidth (–3dB) 75 KHz
A

SB

V

sb IN

V

sb OUT

I

sb

A

M

V

M IN

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 50 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 Standard BTL Mode Op. (V

High Efficiency Mode (V

(Pull up to 5V with 10KΩ)

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

Omin

= 10W

pin 16

pin 16

-10 1 10 µA

) Open

)0.5V

5 µA

W
W

W
W

W
W

W
W

%
%
%

%
%

µA

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TDA7454

Figure 1:

Standard Test and Application Circuit.

C8

0.1µF

ST-BY

MUTE

IN RF

IN RR

IN LF

IN LR

(*) OPEN = STANDARD BTL
CLOSED=HI-EFF BTL

R1

10K

R2

10K

C1

0.22µF

C2 0.22µF

C3 0.22µF

C4 0.22µF

C6

0.1µF

C7

1µF

S-GND

4

22

11

12

15

14

13

16 10 25 1

(*)

SW1

C5

100µF

C9

2200µF

Vcc1 Vcc2

620

TDA7454

SVR TAB

CLIP DET

9
8
7

5
2
3

17
18
19

21
24
23

OUT RF

OUT RR

OUT LF

OUT LR

D95AU416

4/13