SONY 140 Service Manual



TDA2005

20W BRIDGE AMPLIFIERFOR CAR RADIO

High output power :

d = 10% ; P

=20W@RL=4Ω,d=1%.

O

= 10 + 10 W@RL=2Ω,

P

O

Highreliabilityofthechip and packagewithaddi­tional complete safety during operation thanks to
protectionagainst:

.

OUTPUT DC AND AC SHORT CIRCUIT TO
GROUND

.

OVERRATINGCHIPTEMPERATURE

.

LOADDUMPVOLTAGESURGE

.

FORTUITOUS OPEN GROUND

.

VERYINDUCTIVE LOADS

Flexibilityin use :

bridgeor stereoboosterampli­fierswith orwithoutboostrapandwith programma­blegain and bandwidth.

Space and cost saving : very low number of
external components, very simple mounting sys­tem with no electrical isolation between the pack­age and the heatsink(one screwonly).

In addition, the circuitoffers

tion

during short circuitfor one wire to ground.

loudspeaker protec-

ORDERING NUMBERS : TDA2005M (Bridge Appl.)

DESCRIPTION

TheTDA2005isclassB dualaudio poweramplifier
in MULTIWATTpackagespecificallydesignedfor

car radio application :
are easilydesignedusing this devicethatprovides
a high currentcapability(up to 3.5 A) and that can
drive very low impedance loads (down to 1.6Ω in

MULTIWATT11

TDA2005S (Stereo Appl.)

power booster amplifiers

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

s

V

s

V

s

(*) Output Peak Current (non repetitive t = 0.1 ms) 4.5 A

I

o

I

(*)

o

P

tot

T

stg,Tj

(*) The max. output current is internally limited.

Operating Supply Voltage 18 V
DC Supply Voltage 28 V
Peak Supply Voltage (for 50 ms) 40 V

Output Peak Current (repetitive f≥10 Hz)
Power Dissipation at T
Storage and Junction Temperature – 40 to 150

case

=60°C

3.5 A
30 W

°C

PIN CONNECTION

October 1998

TAB CONNECTEDTO PIN 6

11
10

9
8
7
6
5
4
3
2
1

D95AU318

BOOTSTRAP(1)
OUTPUT(1)
+V

S

OUTPUT(2)
BOOTSTRAP(2)
GND
INPUT+(2)
INPUT-(2)
SVRR
INPUT-(1)
INPUT+(1)

1/20

TDA2005

SCHEMATIC DIAGRAM

THERMALDATA

Symbol Parameter Value Unit

Thermal ResistanceJunction-case Max. 3 °

2/20

R

thj-case

C/W

BRIDGE AMPLIFIERAPPLICATION(TDA2005M)

Figure1 : Test and ApplicationCircuit (Bridgeamplifier)

TDA2005

Figure2 :

P.C.Board and ComponentsLayoutof Figure1 (1:1scale)

3/20

TDA2005

ELECTRICALCHARACTERISTICS

R

th (heatsink

)=4oC/W, unlessotherwise specified)

(referto the

Bridge

applicationcircuit, T

=25oC, GV=50dB,

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

V

P

Supply Voltage 8 18 V

s

Output Offset Voltage (1)

os

(between pin 8 and pin 10)
Total Quiescent Drain Current

I

d

Output Power d = 10% f = 1 Hz

o

Vs= 14.4V

= 13.2V

V

s

= 14.4V RL=4Ω

V

s

V

= 13.2V RL= 3.2Ω

s

V

= 14.4V RL=4

s

V

= 13.2V RL= 3.2 Ω

s

R

L

= 3.2

Ω

18

Ω

20
17

150
150mVmV

7570150

160mAmA

20
22
19

d Distortion f = 1kHz

= 14.4V RL=4Ω

V

V

Input Sensitivity f = 1kHz

i

Input Resistance f = 1kHz 70

R

i

Low Frequency Roll Off (– 3dB)

f

L

High Frequency Roll Off (– 3dB)

f

H

G
e

Closed Loop Voltage Gain f = 1kHz 50 dB

v

Total Input Noise Voltage

N

SVR SupplyVoltage Rejection

Efficiency V

η

Thermal Shut-down Junction

T

j

Temperature

V

Notes :

Output Voltage with oneSide of

OSH

the Speaker shorted to ground

1. For TDA2005M only

2. Bandwith Filter :22Hz to 22kHz.

s

= 50mW to 15W

P

o

V

= 13.2V RL= 3.2

s

= 50mW to 13W

P

o

P

=2W RL=4Ω

o

P

=2W RL= 3.2Ω

o

= 3.2Ω

R

L

= 3.2

R

R
R

f

P
P
V
P

V
f = 1kHz, P

V
V

Ω 20 kHz

L

= 10kΩ(2)

g

= 10kΩ,C4=10µF

g

= 100Hz, V

ripple

= 14.4V, f = 1 kHz

s

= 20W RL=4Ω

o

= 22W RL= 3.2Ω

o

= 13.2V, f = 1 kHz

s

= 19W RL= 3.2Ω

o

= 14.4V, RL=4

s

= 14.4V RL=4Ω

s

= 13.2V RL= 3.2Ω

s

tot

ripple

Ω

= 13W

Ω

45 55 dB

= 0.5V

60
60

58

145

1
1

9
8

40 Hz

310µ

2V

W

%
%

mV
mV

k

Ω

V

%
%

%

C

°

4/20

TDA2005

Figure3 : Output OffsetVoltage versus

SupplyVoltage

Figure5 :

Distortionversus Output Power
(bridgeamplifier)

Figure4 : Distortion versus Output Power

(bridgeamplifier)

BRIDGEAMPLIFIER DESIGN

The followingconsideraionscan be useful when designing a bridge amplifier.

Parameter Single Ended Bridge

1

V

omax

I

o max

P

omax

Where : V

Peak OutputVoltage (before clipping)

Peak OutputCurrent (before clippling)

RMS Output Power (before clipping)

= output transistors saturation voltage

CE sat

= allowablesupply voltage

V

S

= load impedance

R

L

(Vs–2V

2

V

1

S

2

(VS− 2V

1

4

− 2V
R

2R

CE sat

CE sat

L

CE sat
L

)

2

)

(V

V
V

S

–2V

s

− 2V

S

−2V

R

2R

CE sat

CE sat

L

CE sat
L

2

)

5/20

TDA2005

Voltageand current swings are twice for a bridge
amplifierincomparisonwith singleendedamplifier.
In order words, with the same R

the bridge con-

L

figuration can deliver an output power that is four
times theoutputpower of a singleended amplifier,
while,with the samemax output current thebridge
configuration can deliver an output power that is
twice the output powerof asingle ended amplifier.
Core must be taken when selecting V

and RLin

S

order to avoid an output peak current above the
absolute maximumrating.

From the expression for I
= 14.4V and V

= 2V, the minimum load that

CE sat

, assuming V

Omax

S

can be driven by TDA2005in bridgeconfiguration
is :

R

L min

− 2V

V

S

=

I

Omax

CEsat

=

14.4 −

3.5

4

=2.97Ω

Thevoltagegainof thebridgeconfigurationisgiven
by (see Figure 34) :

V

0

=

V

=1+

1

G

V





R

R

2

R

1

2⋅R4

+R

R

3

+

R



4



4



STEREOAMPLIFIERAPPLICATION (TDA2005S)

Forsufficientlyhighgains(40 to50dB)itis possible
toput R

andR3=2R1, simplifingtheformula

2=R4

in :

R

1

=4

G

V

R

2

Gv(dB)

40
50

(Ω)R2=R4(Ω)R3(Ω)

R

1

1000
1000

39
12

2000
2000

Figure 6 : BridgeConfiguration

Figure7 :

TypicalApplicationCircuit

6/20

TDA2005

ELECTRICALCHARACTERISTICS

R

th (heatsink)

=4oC/W, unlessotherwwise specified

(referto the

Stereo

)

applicationcircuit, T

=25oC, GV=50dB,

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V
V

P

Supply Voltage 8 18 V

s

Quiescent Output Voltage Vs= 14.4V

o

Total Quiescent Drain Current Vs= 14.4V

I

d

Output Power (each channel) f = 1kHz, d = 10%

o

V

V

V

V
V

= 13.2V

s

= 13.2V

s

= 14.4V RL=4Ω

s

= 13.2V RL= 3.2Ω

s

= 16V RL=2Ω

s

R
R
R

R

L
L
L

L

= 3.2Ω
=2Ω
= 1.6Ω

= 1.6Ω

6.667.2

6
7
9

10

6
9

7.8

6.6

7.2VV

6562120

120mAmA

6.5
8

10
11

6.5

10
12

d Distortion (each channel) f = 1kHz

= 14.4V RL=4

CT Cross Talk (1) V

Input Saturation Voltage 300 mV

V

i

Input Sensitivity f = 1kHz, Po=1W

V

i

Input Resistance f = 1kHz 70 200

R

i

Low Frequency Roll Off (– 3dB)

f

L

High Frequency Roll Off (– 3dB)

f

H

G
G

∆ G

e

Voltage Gain (open loop) f = 1kHz 90 dB

v

Voltage Gain (closed loop) f = 1kHz 48 50 51 dB

v

Closed Loop Gain Matching 0.5 dB

v

Total Input Noise Voltage

N

SVR SupplyVoltage Rejection

Efficiency V

η

Notes : 1. For TDA2005Monly

2. Bandwith Filter :22Hz to 22kHz.

V

s

= 50mW to 4W

P

o

V

= 14.4V RL=2Ω

s

= 50mW to 6W

P

o

V

= 13.2V RL= 3.2Ω

s

= 50mW to 3W

P

o

= 13.2V RL= 1.6Ω

V

s

= 40mW to 6W

P

o

= 14.4V, Vo=4V

s

RL=4Ω,Rg=5k

=2Ω

R

L

=2

R

Ω

L

= 10kΩ (2)

R

g

= 10kΩ,C3=10µF

R

g

= 100Hz, V

f

ripple

= 14.4V, f= 1kHz

s

P

= 6.5W RL=4Ω

o

P

= 10W RL=2Ω

o

= 13.2V, f= 1kHz

V

s

P

= 6.5W RL= 3.2Ω

o

P

= 100W RL= 1.6Ω

o

RMS

Ω

f = 1kHz
f = 10kHz

R

=4Ω

L

R

= 3.2Ω

L

= 0.5V

ripple

Ω

0.2

0.3

0.2

0.3

1
1
1
1

60
45

6

5.5

50 Hz

15 kHz

1.5 5

35 45 dB

70
60

70
60

W

%
%
%
%

dB

mV

k

Ω

µV

%
%

%
%

7/20