STMicroelectronics TDA7293 Schematic [ru]

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TDA7293

120V - 100W DMOS AUDIO AMPLIFIER WITHMUTE/ST-BY

VERY HIGH OPERATING VOLTAGE RANGE
(±50V)

DMOSPOWERSTAGE
HIGH OUTPUT POWER (100W @ THD =

10%, R

L =8

,VS=±40V)

Ω

MUTING/STAND-BYFUNCTIONS
NO SWITCHON/OFF NOISE
VERYLOW DISTORTION
VERYLOW NOISE
SHORT CIRCUIT PROTECTED (WITHNO IN-

PUT SIGNAL APPLIED)
THERMALSHUTDOWN
CLIPDETECTOR
MODULARITY (MORE DEVICES CAN BE

EASILY CONNECTED IN PARALLEL TO
DRIVE VERYLOW IMPEDANCES)

DESCRIPTION

The TDA7293 is a monolithic integrated circuit in
Multiwatt15 package, intended for use as audio
class AB amplifier in Hi-Fi field applications
(Home Stereo, self powered loudspeakers, Top-

Figure 1: Typical Applicationand Test Circuit

MULTIPOWER BCD TECHNOLOGY

Multiwatt15

ORDERING NUMBER: TDA7293V

class TV). Thanks to the wide voltage range and
to the high out current capability it is able to sup­ply the highest powerinto both4Ω and 8Ω loads.

The built in muting function with turn on delay
simplifiesthe remote operation avoiding switching
on-off noises.
Parallel mode is made possible by connecting
more device through of pin11. High output power
can be deliveredto verylow impedance loads, so
optimizingthe thermal dissipation ofthe system.

VMUTE

VSTBY

October 2000

C7 100nF C6 1000µF

R3 22K

C2

R2

22µF

680Ω

C1 470nF

R1 22K

R5 10K

R4 22K

C3 10µFC410µF

IN- 2

IN+

3

4

SGND
(**)

10

MUTE

9

STBY

(*) see Application
(**) for SLAVE function

note

MUTE

STBY

1
STBY-GND

+Vs

BUFFER DRIVER

713

11

-

+

THERMAL

SHUTDOWN

-Vs -PWVs

C9 100nF C8 1000µF

PROTECTION

158

-Vs

+PWVs+Vs

S/C

14

12

6
5

D97AU805A

OUT

BOOT
LOADER

C5

22µF

BOOTSTRAP

CLIP DET

(*)

VCLIP

1/13

TDA7293

PIN CONNECTION (Top view)

TAB CONNECTED TO PIN 8

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

D97AU806

-VS(POWER)
OUT

(POWER)

+V

S

BOOTSTRAP LOADER
BUFFER DRIVER
MUTE
STAND-BY

-V

(SIGNAL)

S

+VS(SIGNAL)
BOOTSTRAP
CLIP AND SHORT CIRCUIT DETECTOR
SIGNAL GROUND
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND

QUICK REFERENCEDATA

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

S

G

LOOP

P

tot

SVR Supply Voltage Rejection 75 dB

Supply Voltage Operating ±12 æ 50 V
Closed Loop Gain 26 40 dB
Output Power VS=±45V; RL=8Ω; THD = 10% 140 W

= ±30V; RL =4Ω; THD = 10% 110 W

V

S

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

S

V
V

2 -V3 Maximum Differential Inputs ±30 V

V

V
V
V
V
V

V

10
11 Buffer Voltage Referred to -VS 120 V

V
V

12

I

O

P

tot

T

op

T

stg,Tj

Supply Voltage (No Signal)
V

1
2

3
4

5 Clip Detector Voltage Referred to -VS 120 V
6
9

STAND-BY

Input Voltage (inverting) Referred to -V

Input Voltage (non inverting) Referred to -V
Signal GND Voltage Referred to -V

Bootstrap Voltage Referred to -V
Stand-by Voltage Referred to -V
Mute Voltage Referred to -V

Bootstrap Loader Voltage Referred to -V

GND Voltage Referred to -VS(pin 8) 90 V

S

S

S

S

S

S

S

Output Peak Current 10 A
Power Dissipation T

=70°C50W

case

Operating Ambient Temperature Range 0 to 70
Storage and Junction Temperature 150

60 V

±

90 V

90 V
90 V

120 V
120 V
120 V

100 V

THERMAL DATA

Symbol Description Typ Max Unit

R

th j-case

Thermal Resistance Junction-case 1 1.5

°
°

C/W

°

C
C

2/13

TDA7293

ELECTRICALCHARACTERISTICS(Refer to the Test Circuit VS= ±40V,RL=8Ω,Rg=50Ω;

T

=25°C,f = 1 kHz; unlessotherwise specified).

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

V

I
P

Supply Range

S

Quiescent Current 30 mA

I

q

Input Bias Current 0.3 1

I

b

Input Offset Voltage -10 10 mV

OS

Input Offset Current 0.2

OS

RMS Continuous Output Power d = 1%:

O

R

=4Ω; VS = ± 29V,

L

d = 10%
R

=4Ω ;VS=±29V

L

d Total Harmonic Distortion (**) P

I

Current Limiter Threshold V

SC

= 5W; f = 1kHz

O

P

=0.1to 50W;f = 20Hz to 15kHz

O

40V 6.5 A

S ≤±

SR Slew Rate 15 V/µs

G
G

e

Open Loop Voltage Gain 80 dB

V

Closed Loop Voltage Gain (1) 30 dB

V

Total Input Noise A = curve

N

f = 20Hz to 20kHz

R

SVR Supply Voltage Rejection f = 100Hz; V

T

Input Resistance 100 kΩ

i

= 0.5Vrms 75 dB

ripple

Thermal Protection DEVICE MUTED 150

S

DEVICE SHUT DOWN 160 °C

STAND-BY FUNCTION (Ref: to pin 1)

V
V

ATT

I

q st-by

ST on
ST off

Stand-by on Threshold 1.5 V
Stand-by off Threshold 3.5 V
Stand-by Attenuation 70 90 dB

st-by

Quiescent Current @ Stand-by 0.5 mA

MUTE FUNCTION (Ref: to pin 1)

V
V

ATT

Mute on Threshold 1.5 V

Mon

Mute off Threshold 3.5 V

Moff

Mute AttenuatIon 60 80 dB

mute

CLIP DETECTOR

Ω

Duty Duty Cycle ( pin 5) THD = 1% ; RL = 10K

to 5V 10 %

THD = 10% ;
RL = 10KΩto 5V

I

CLEAK

SLAVE FUNCTION pin 4 (Ref: to pin 8 -V

V

Slave

V

Master

Note (1): GVmin ≥ 26dB
Note: Pin 11 only for modular connection.Max external load 1MΩ/10 pF,only for test purpose

Note (**): Tested with optimized Application Board (see fig. 2)

SlaveThreshold 1V
Master Threshold 3 V

PO = 50W 1 µA

)

S

12

±

50 V

±

80
80

100
100

0.005

0.1

1
25

40 %

A

µ

A

µ

W

W

%
%

V

µ

V

µ

C

°

3/13

TDA7293

Figure 2: Typical Application P.C. Boardand ComponentLayout (scale1:1)

4/13

TDA7293

APPLICATIONSUGGESTIONS(seeTest andApplication Circuitsof the Fig. 1)

The recommendedvalues of the external components are those shown on the application circuit of Fig­ure 1. Different valuescan be used; the followingtable can help the designer.

COMPONENTS SUGGESTED VALUE PURPOSE

LARGER THAN

SUGGESTED

R1 (*) 22k INPUT RESISTANCE INCREASE INPUT

IMPEDANCE

R2 680

Ω

CLOSED LOOP GAIN

DECREASE OF GAIN INCREASE OF GAIN

SMALLER THAN

SUGGESTED

DECREASE INPUT

IMPEDANCE

SET TO 30dB (**)

R3 (*) 22k INCREASE OF GAIN DECREASE OF GAIN

R4 22k ST-BY TIME

CONSTANT

LARGER ST-BY

ON/OFF TIME

SMALLER ST-BY

ON/OFF TIME;

POP NOISE

R5 10k MUTE TIME

CONSTANT

C1 0.47µF INPUT DC

DECOUPLING

LARGER MUTE

ON/OFF TIME

SMALLER MUTE

ON/OFF TIME
HIGHER LOW

FREQUENCY

CUTOFF

C2 22µF FEEDBACK DC

DECOUPLING

HIGHER LOW

FREQUENCY

CUTOFF

C3 10µF MUTE TIME

CONSTANT

C4 10µF ST-BY TIME

CONSTANT

LARGER MUTE

ON/OFF TIME

LARGER ST-BY

ON/OFF TIME

SMALLER MUTE

ON/OFF TIME

SMALLER ST-BY

ON/OFF TIME;

POP NOISE

C5 22µFXN (***) BOOTSTRAPPING SIGNAL

C6, C8 1000µF SUPPLY VOLTAGE

C7, C9 0.1µF SUPPLY VOLTAGE

(*) R1 = R3 for pop optimization
(**) Closed Loop Gain has to be≥26dB
(***) Multiplay this value for thenumber of modular part connected

Slave function:pin 4 (Ref to pin8 -VS)

+3V

-V

S

+1V

-V

S

-V

S

MASTER

UNDEFINED

SLAVE

D98AU821

DEGRADATION AT
LOW FREQUENCY

BYPASS

DANGER OF

BYPASS

OSCILLATION

Note:

If in the application, the speakers are connected
via long wires, it is a good rule to add between
the output and GND, a BoucherotCell, in order to
avoid dangerous spurious oscillations when the
speakersterminal are shorted.

The suggested Boucherot Resistor is 3.9Ω/2W
and the capacitoris 1µF.

5/13