Philips tda7482 DATASHEETS

TDA7482

Fi

25W MONO CLASS-D AMPLIFIER

1FEATURES

■ 25W OUTPUT POWER:

RL = 8Ω/4Ω; THD = 10%

■ HIGH EFFICIENCY

■ WIDE SUPPLY VOLTAGE RA NGE (U P TO

±25V)

■ SPLIT SUPPLY

■ OVERVOLTAGEPROTECTION

■ ST-BY AND MUTE FEATURES

■ SHORT CIRCUIT PROTECTION

■ THERMAL OVERLOAD PR OTEC TION

2DESCRIPTION

The TDA7482 is an audio class-D amplifier as-

Figure 2. Tes t an d A pp li ca tio n C i rcui t .

+5V

R1

10K

R3

R2

30K

10K

MUTEST-BY 10

IN1

C2 0.33µF

C4 4.7nF

D96AU538C

C1

2.2
µF

ST-BY/

MUTE

C3

1nF

FEEDCAP

SGN-GND

270pF

IN1

9

5

7

C8

C5 100nF

-VCC

(Pin 14,15)

V

N.C.

CC POW

-

PRE

+

13 11

4

6 8 14,15

FREQ -V

R4 12KΩ
(RF) -VCC

gure 1. Package

Multiwatt15

Table 1. Orde r Codes

Part Number Package

TDA7482 Multiwatt15

sembled in Multiwatt15 package specially de­signed for high efficiency applications mainly for
TV and Home Stereo sets.

+VCC

3

1

12

2

C7

2200µF

BOOT

OUT

VREG

BOOTDIODE

C10

2200µF

C11

100nF

C12

560pF

R5

150Ω

L1 60µH

C14

470nF

C15

100nF

-V

CC SIGN

V

CC SIGN

100nF

-

PWM

+

C9

100nF

C6

CC POW

8Ω

October 2004

Rev. 4

1/7

TDA7482

Table 2. Pin Description

N° Pin Function

1 OUT PWM OUTPUT
2 BOOTDIODE BOOTSTRAP DIODE ANODE
3BOOTBOOTSTRAP
4NCNOT CONNECTED
5 FEEDCAP FEEDBACK INTEGRATING CAPACITOR
6 FREQ SETTING FREQUENCY RESISTOR
7 SGN-GND SIGNAL GROUND
8–V

9 IN INPUT
10 ST-BY/MUTE CONTROL STATE PIN
11 +V
12 VREG INTERNAL VOLTAGE REGULATOR
13 +VCC POW POSITIVE POWER SUPPLY
14 -V
15 -V

Table 3. Absolute Maximum Ratings

SIGN SIGNAL NEGATIVE SUPPLY

CC

SIGN POSITIVE SIGNAL SUPPLY

CC

POW NEGATIVE POWER SUPPLY (to be connected to pin 13 via C5)

CC

POW NEGATIVE POWER SUPPLY (to be connected to pin 13 via C5)

CC

Symbol Parameter Value Unit

T

V

V

CC

P

tot

, T

stg

FREQ

T

op

DC Supply Voltage ±28 V
Power Dissipation T
Storage and Junction Temperature –40 to 150 °C

j

= 70°C 35 W

case

Maximum Voltage Across RF (pin6) 8 V
Operating Temperature Range 0 to 70 °C

ESD Max ESD on Pins ±1.2 KV

Figure 3.

D96AU539A

-V

CC POW

-V

CC POW

+V

CC POW

VREG
+V

CC SIGN

ST-BY/MUTE
IN

-V

CC SIGN

SGN-GND
FREQ
FEEDCAP
N.C.
BOOT
BOOTDIODE
OUT

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

TAB CONNECTED TO PIN 8

Table 4. Thermal Data

Symbol Parameter Value Unit

2/7

T

th j-case

Thermal Resistance Junction-case 1.8 to 2.5 °C/W

TDA7482

-

---

Table 5. Electrical Characteristcs (Refer to the test circuit, VCC = ±21V; RL = 8Ω; RS = 50Ω;

= 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; T

R

F

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

I

q

V

OS

P

O

Supply Range ±10 ±25 V
Total Quiescent Current

R

= ∞, No LC Filter

L

Output Offset Voltage Play Condition –70 -30 10 mV
Output Power THD = 10%

THD = 1%

P

O

Output Power RL = 4Ω ; VCC = ±16V;

THD = 10%
THD = 1% (*)

P

D

η

η

max

Maximum Dissipated Power VCC =±21V; RL = 8Ω;

P

= 25W THD 10%

O

= ±21V; RL = 8Ω;

V

P

Efficiency ≡ (∗∗)

--------------------

POPD+

P

o

o

---

≡

P

I

CC

P

= 18W THD 10%

O

Top Efficiency maximum VCC = ±25V; RL = 8Ω;

PO = 43W THD 20%

THD Total Harmonic Distortion R

I

max

T

Overcurrent Protection Threshold RL = 0 3.5 5 A
Thermal Shut-down Junction

j

= 8Ω; PO = 1W 0.1 %

L

Temperature

G

V

e

N

Closed Loop Gain 29 30 31 dB
Total Input Noise A Curve

f = 20Hz to 22KHz

V

CCTOT MAX

R

SVR Supply Voltage Rejection f = 100Hz; V

, T

T

r

R

DSON

F

SW-OP

Maximum Total VCC Protection 50 V
Input Resistance 20 30 kΩ

i

= 0.5 46 60 dB

r

Rising and Falling Time 50 ns

f

Power Transistor on Resistance 0.4 Ω
Switching Frequency Operative

Range

F

SW

B

F

Switching Frequency 100 120 140 KHz
Zero Signal Frequency

Constant (***)

R

F

Frequency Controller Resistor
Range (****)

MUTE & STAND-BY FUNCTIONS

V

ST-BY

V

MUTE

V

PLAY

A

MUTE

I

qST-BY

*: The outp ut LC f i ltermust be ch anged to: L = 30µH; C = 1µF
**: P
***: The zero-signal switc hing frequ ency can be obtained using the following expression : F
****: The maximum value of RF is related to the maximum possible val ue for the vo l ta ge drop on RF itself

Stand-by range 0.8 V
Mute Range 1.8 2.5 V
Play Range (1) 4 V
Mute Attenuation 60 80 dB
Quiescent Current @ Stand-by 3 5 mA

= measured across the load using the following inductor: COIL 58120 MPPA2 (magnetics) TURNS: 28 φ 1mm

O

= 25°‘C unless otherwise specified.)

amb

40 60 mA

20
14

25
18

25
18

3.8 W

87 %

88.5 %

150 °C

7

12

100 200 KHz

9

1.4x10

71214KΩ

= BF/R

SW

F

W
W

W
W

µV
µV

HzΩ

(1) For V10 >5.2V , an i nput impedance of 10KΩ is to be considered

3/7