Datasheet TDA8547TS Datasheet (Philips)

INTEGRATED CIRCUITS

DATA SH EET

TDA8547TS

2 × 0.7 W BTL audio amplifier with
output channel switching

Product specification
Supersedes data of 1997 Oct 14
File under Integrated Circuits, IC01

1998 Apr 01

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

FEATURES

• Selection between output channels

• Flexibility in use

• Few external components

• Low saturation voltage of output stage

• Gain can be fixed with external resistors

• Standby mode controlled by CMOS compatible levels

• Low standby current

• No switch-on/switch-off plops

• High supply voltage ripple rejection

• Protected against electrostatic discharge

• Outputs short-circuit safe to ground, V

load

• Thermally protected.

APPLICATIONS

and across the

CC

TDA8547TS

GENERAL DESCRIPTION

The TDA8547TS is a two channel audio power amplifier
for an output power of 2 × 0.7 W with a 16 Ω load at a 5 V
supply. At a low supply voltage of 3.3 V an output power of

0.6 W with an 8 Ω load can be obtained. The circuit
contains two BTL amplifiers with a complementary
PNP-NPN output stage and standby/mute logic.
The operating condition of all channels of the device
(standby, mute or on) is externally controlled by the
MODE pin. With the SELECT pin one of the output
channels can be switched in the standby condition. This
feature can be used for loudspeaker selection and also
reduces the quiescent current consumption.
When only one channel is used the maximum output
power is 1.2 W.

• Telecommunication equipment

• Portable consumer products

• Personal computers

• Motor-driver (servo).

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

CC

I

q

I

stb

P

o

THD total harmonic distortion P

supply voltage 2.2 5 18 V
quiescent current VCC= 5 V; 2 channels − 15 22 mA

= 5 V; 1 channel − 812mA

V

CC

standby current −−10 µA
output power

two channels THD = 10%; R

THD = 10%; R

one channel THD = 10%; R

THD = 10%; R

= 0.4 W − 0.15 − %

o

=8Ω; VCC= 3.3 V 0.5 0.6 − W

L

=16Ω; VCC= 5 V 0.6 0.7 − W

L

=8Ω; VCC=5V 1 1.2 − W

L

=4Ω; VCC= 3.3 V 1 1.2 − W

L

SVRR supply voltage ripple rejection 50 −−dB

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA8547TS SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1

1998 Apr 01 2

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

BLOCK DIAGRAM

handbook, full pagewidth

IN1−
IN1+

17
16

V

CC1

−

−
+

20 kΩ

TDA8547TS

V

V

CC1

CC2

11

20

18

OUT1−

R

R

−

−
+

3

OUT1+

IN2−
IN2+

SVRR

MODE

SELECT

n.c.

14
15

5

4
6

2, 7, 9, 12, 19

5

20 kΩ

STANDBY/MUTE LOGIC

−

−
+

V

CC2

20 kΩ

20 kΩ

STANDBY/MUTE LOGIC

TDA8547TS

R

R

−

−
+

GND1

13

8

110

GND2

OUT2−

OUT2+

MGK984

Fig.1 Block diagram.

1998 Apr 01 3

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

PINNING

SYMBOL PIN DESCRIPTION

GND1 1 ground, channel 1
n.c. 2 not connected
OUT1+ 3 positive loudspeaker terminal,

channel 1

MODE 4 operating mode select (standby, mute,

operating)

SVRR 5 half supply voltage, decoupling ripple

rejection
SELECT 6 input for selection of operating channel
n.c. 7 not connected
OUT2+ 8 positive loudspeaker terminal,

channel 2
n.c. 9 not connected
GND2 10 ground, channel 2
V

CC2

n.c. 12 not connected
OUT2− 13 negative loudspeaker terminal,

IN2− 14 negative input, channel 2
IN2+ 15 positive input, channel 2
IN1+ 16 positive input, channel 1
IN1− 17 negative input, channel 1
OUT1− 18 negative loudspeaker terminal,

n.c. 19 not connected
V

CC1

11 supply voltage, channel 2

channel 2

channel 1

20 supply voltage, channel 1

handbook, halfpage

GND1

1

n.c.

2

OUT1+

SELECT

OUT2+

MODE

SVRR

n.c.

n.c.

GND2

3
4
5

TDA8547TS

6
7
8
9

10

MGK998

Fig.2 Pin configuration.

TDA8547TS

V

20

CC1

19

n.c.

18

OUT1−

17

IN1−

16

IN1+

15

IN2+
IN2−

14

OUT2−

13

n.c.

12

V

11

CC2

FUNCTIONAL DESCRIPTION

The TDA8547TS is a 2 × 0.7 W BTL audio power amplifier
capable of delivering 2 × 0.7 W output power to a 16 Ω
load at THD = 10% using a 5 V power supply. Using the
MODE pin the device can be switched to standby and
mute condition. The device is protected by an internal
thermal shutdown protection mechanism. The gain can be
set within a range from 6 to 30 dB by external feedback
resistors.

Power amplifier

The power amplifier is a Bridge-Tied Load (BTL) amplifier
with a complementary PNP-NPN output stage.
The voltage loss on the positive supply line is the
saturation voltage of a PNP power transistor, on the
negative side the saturation voltage of a NPN power

1998 Apr 01 4

transistor. The total voltage loss is <1 V and with a 5 V
supply voltage and a 16 Ω loudspeaker an output power of

0.7 W can be delivered, when two channels are operating.
If only one channel is operating then an output power of

1.2 W can be delivered (5 V, 8 Ω).

MODE pin

The whole device (both channels) is in the standby mode
(with a very low current consumption) if the voltage at the
MODE pin is >(V

− 0.5 V), or if this pin is floating. At a

CC

MODE voltage level of less than 0.5 V the amplifier is fully
operational. In the range between 1.5 V and V

CC

− 1.5 V
the amplifier is in mute condition. The mute condition is
useful to suppress plop noise at the output caused by
charging of the input capacitor.

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

SELECT pin

If the voltage at the SELECT pin is in the range between

1.5 V and VCC− 1.5 V, or if it is kept floating, then both
channels can be operational. If the SELECT pin is set to a
LOW voltage or grounded, then only channel 2 can
operate and the power amplifier of channel 1 will be in the
standby mode. In this case only the loudspeaker at
channel 2 can operate and the loudspeaker at channel 1
will be switched off. If the SELECT pin is set to a
HIGH level or connected to VCC, then only channel 1 can
operate and the power amplifier of channel 2 will be in the
standby mode. In this case only the loudspeaker at
channel 1 can operate and the loudspeaker at channel 2
will be switched off. Setting the SELECT pin to a LOW or

Table 1 Control pins MODE and SELECT versus status of output channels
Voltage levels at control pins at V

= 5 V; for other supply voltages see Figs. 14 and 15.

P

CONTROL PIN

MODE SELECT CHANNEL 1 CHANNEL 2

(1)

HIGH

HVP
HVP
HVP

HVP

LOW

(4)
(4)
(4)

/NC

(4)
(5)

/LOW
/LOW
/LOW

(2)

(5)
(5)
(5)

HVP
HVP

HIGH

HVP

LOW

a HIGH voltage results in a reduction of quiescent current
consumption by a factor of approximately 2.

Switching with the SELECT pin during operating is not
plop-free, because the input capacitor of the channel
which is coming out of standby needs to be charged first.
For plop-free channel selecting the device has first to be
set in mute condition with the MODE pin (between 1.5 V
and V

− 1.5 V), then set the SELECT pin to the new

CC

level, after a delay set the MODE pin to a LOW level.
The delay needed depends on the values of the input
capacitor and the feedback resistors. Time needed is
approx. 10 × C1 × (R1 + R2), so approximately 0.6 s. for
the values in Fig.4.

(3)

X

(4)

(2)

/NC

(4)

(2)

/NC

(1)

(4)

(2)

/NC

(5)

TDA8547TS

STATUS OF OUTPUT

CHANNEL

standby standby 0

mute mute 15

on on 15
mute/on standby 8
mute/on mute/on 15
standby mute/on 8

TYP. I

(mA)

q

Notes

1. HIGH = V

pin>VCC

− 0.5 V.

2. NC = not connected or floating.

3. X = don’t care.

4. HVP = 1.5 V < V

5. LOW = V

pin

< 0.5 V.

pin<VCC

− 1.5 V.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

CC

V

I

I

ORM

T

stg

T

amb

V

Psc

P

tot

supply voltage operating −0.3 +18 V
input voltage −0.3 VCC+ 0.3 V
repetitive peak output current − 1A
storage temperature −55 +150 °C
operating ambient temperature −40 +85 °C
AC and DC short-circuit safe voltage − 10 V
power dissipation − 1.1 W

1998 Apr 01 5

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with

TDA8547TS

output channel switching

QUALITY SPECIFICATION

In accordance with

THERMAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R

th(j-a)

“SNW-FQ-611-E”

.

thermal resistance from junction to ambient in free air 110 K/W

2.0

handbook, halfpage

P

(W)

1.6

1.2

0.8

MGK987

0.4

0

0 40 80 160

120

T

amb

(°C)

Fig.3 Power derating curve.

Table 2 Maximum ambient temperature at different conditions

CONTINUOUS SINE WAVE DRIVEN

V

(V)

CC

R

(Ω)

L

APPLICATION

P

(W)

o

(1)

P

max

(W)

3.3 4 1 channel 1.2 0.58 86

3.3 4 2 channels 2 × 1.2 1.12 27

3.3 8 1 channels 0.6 0.3 117

3.3 8 2 channels 2 × 0.6 0.60 84
5 8 1 channel 1.2 0.67 76
5 8 2 channels 2 × 1.2 1.33 −
5 16 1 channel 0.7 0.35 112
5 16 2 channels 2 × 0.7 0.70 73

T

amb(max)

(°C)

Note

1. At THD = 10%.

1998 Apr 01 6

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with

TDA8547TS

output channel switching

DC CHARACTERISTICS

V

=5V; T

CC

otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

CC

I

q

I

stb

V

O

OUT+

, I

IN−

MODE

SELECT

− V

V

I

IN+

V

I

MODE

V

I

SELECT

=25°C; RL=8Ω; V

amb

supply voltage operating 2.2 5 18 V
quiescent current BTL 2 channels;

standby current V
DC output voltage note 2 − 2.2 − V

 differential output voltage

OUT−

offset
input bias current −−500 nA
input voltage MODE pin operating 0 − 0.5 V

input current MODE pin 0 V < V
input voltage SELECT pin channel 1 = standby;

input current SELECT pin V

= 0 V; gain = 20 dB; measured in BTL application circuit Fig.4; unless

MODE

− 15 22 mA

note 1
BTL 1 channel;

− 812mA

note 1

MODE=VCC

−−10 µA

−−50 mV

mute 1.5 − V
standby V

MODE<VCC

− 0.5 − V

CC

−−20 µA
0 − 1V

channel 2 = on
channel 1 = on;

V

− 1 − V

CC

channel 2 = standby

SELECT

=0V −−100 µA

− 1.5 V

CC
CC

CC

V

V

Notes

1. Measured with R

= ∞. With a load connected at the outputs the quiescent current will increase, the maximum of this

L

increase being equal to the DC output offset voltage divided by RL.

2. The DC output voltage with respect to ground is approximately 0.5VCC.

1998 Apr 01 7

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with

TDA8547TS

output channel switching

AC CHARACTERISTICS

V

=5V; T

CC

unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

P

o

THD total harmonic distortion Po= 0.4 W − 0.15 0.3 %
G

v

Z

i

V

no

SVRR supply voltage ripple rejection note 3 50 −−dB

V

o

α

cs

Notes

1. Gain of the amplifier is in BTL application circuit Fig.4.

2. The noise output voltage is measured at the output in a frequency range from 20 Hz to 20 kHz (unweighted), with a
source impedance of R

3. Supply voltage ripple rejection is measured at the output, with a source impedance of RS=0Ω at the input.
The ripple voltage is a sine wave with a frequency of 1 kHz and an amplitude of 100 mV (RMS), which is applied to
the positive supply rail.

4. Supply voltage ripple rejection is measured at the output, with a source impedance of RS=0Ω at the input.
The ripple voltage is a sine wave with a frequency between 100 Hz and 20 kHz and an amplitude of 100 mV (RMS),
which is applied to the positive supply rail.

5. Output voltage in mute position is measured with a 1 V (RMS) input voltage in a bandwidth of 20 Hz to 20 kHz,
so including noise.

6. Channel separation is measured at the output with a source impedance of RS=0Ω at the input and a frequency of
1 kHz. The output power in the operating channel is set to 0.5 W.

=25°C; RL=8Ω; f = 1 kHz; V

amb

= 0 V; gain = 20 dB; measured in BTL application circuit Fig.4;

MODE

output power, one channel THD = 10% 1 1.2 − W

THD = 0.5% 0.6 0.9 − W

closed loop voltage gain note 1 6 − 30 dB
differential input impedance − 100 − kΩ
noise output voltage note 2 −−100 µV

note 4 40 −−dB
output voltage note 5 −−200 µV
channel separation V

R2

×

2

------- ­R1

=0Ω at the input.

S

SELECT

= 0.5VCC; note 6 40 −−dB

1998 Apr 01 8

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

TEST AND APPLICATION INFORMATION
Test conditions

Because the application can be either Bridge-Tied Load
(BTL) or Single-Ended (SE), the curves of each
application are shown separately.

The thermal resistance = 110 K/W for the SSOP20; the
maximum sine wave power dissipation for T

150 25–

is:

---------------------­110

For T

amb

150 60–

---------------------­110

1.14 W=

=60°C the maximum total power dissipation is:

0.82 W=

Thermal Design Considerations

The ‘measured’ thermal resistance of the IC package is
highly dependent on the configuration and size of the
application board. Data may not be comparable between
different Semiconductor manufacturers because the
application boards and test methods are not (yet)
standardized. Also, the thermal performance of packages
for a specific application may be different than presented
here, because the configuration of the application boards
(copper area!) may be different. Philips Semiconductors
uses FR-4 type application boards with 1 oz copper
traces with solder coating.

The SSOP package has improved thermal conductivity
which reduces the thermal resistance. Using a practical
PCB layout (see Fig.24) with wider copper tracks to the
corner pins and just under the IC, the thermal resistance
from junction to ambient can be reduced to about 80 K/W.
For T

this PCB layout is:

=60°C the maximum total power dissipation at

amb

150 60–

---------------------­80

1.12 W=

Please note that this two channel IC is mentioned for
application with only one channel active. For that reason
the curves for worst case power dissipation are given for
the condition of only one of the both channels driven with
a 1 kHz sine wave signal.

BTL application

amb

=25°C

TDA8547TS

The quiescent current has been measured without any
load impedance and both channels driven. When one
channel is active the quiescent current will be halved.
The total harmonic distortion as a function of frequency
was measured using a low-pass filter of 80 kHz.
The value of capacitor C3 influences the behaviour of the
SVRR at low frequencies: increasing the value of C3
increases the performance of the SVRR.
The figure of the MODE voltage (V
the supply voltage shows three areas; operating, mute
and standby. It shows, that the DC-switching levels of the
mute and standby respectively depend on the supply
voltage level. The figure of the SELECT voltage (V
as a function of the supply voltage shows the voltage
levels for switching the channels in the active, mute or
standby mode.

SE application

T

=25°C if not specially mentioned, VCC= 7.5 V,

amb

f = 1 kHz, RL=4Ω, Gv= 20 dB, audio band-pass
22 Hz to 22 kHz.

The SE application circuit is illustrated in Fig.16.
Increasing the value of electrolytic capacitor C3 will result

in a better channel separation. Because the positive
output is not designed for high output current (2 × Io) at
low load impedance (≤16 Ω), the SE application with
output capacitors connected to ground is advised.
The capacitor value of C6/C7 in combination with the load
impedance determines the low frequency behaviour.
The THD as a function of frequency was measured using
a low-pass filter of 80 kHz. The value of capacitor C3
influences the behaviour of the SVRR at low frequencies:
increasing the value of C3 increases the performance of
the SVRR.

General remark

The frequency characteristic can be adapted by
connecting a small capacitor across the feedback
resistor. To improve the immunity to HF radiation in radio
circuit applications, a small capacitor can be connected in
parallel with the feedback resistor (56 kΩ); this creates a
low-pass filter.

) as a function of

MODE

SELECT

)

T

=25°C if not specially mentioned, VCC=5V,

amb

f = 1 kHz, RL=8Ω, Gv= 20 dB, audio band-pass
22 Hz to 22 kHz.

The BTL application circuit is illustrated in Fig.4.

1998 Apr 01 9

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

BTL APPLICATION

handbook, full pagewidth

Gain channel1 2

Gain channel 2 2

C1

R2

R1

R3

R4

50 kΩ

IN1−
IN1+

C3

47 µF

OUT2−

50 kΩ

IN2−
IN2+

SVRR

MODE

SELECT

1 µF

10 kΩ

V

i1

C2

1 µF

10 kΩ

V

i2

R2

×=

------- ­R1

R4

×=

------- ­R3

20 11

17
16

TDA8547TS

14
15

5
4
6

110

GND

TDA8547TS

V

C4

100 nF

OUT1−

18

R

OUT1+

3

OUT2−

13

OUT2+

8

MGK985

L1

R

L2

C5
100 µF

CC

30

handbook, halfpage

I

q

(mA)

20

10

0

0

RL= ∞.

Fig.4 BTL application.

MGD890

420

81216

VCC (V)

10

handbook, halfpage

THD

(%)

1

−1

10

−2

10

−2

10

f = 1 kHz; Gv=20dB.
(1) VCC= 5 V; RL=8Ω.

MGK988

(1)

−1

10

1

Po (W)

10

Fig.5 Iq as a function of VCC.

1998 Apr 01 10

Fig.6 THD as a function of Po.

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

10

handbook, halfpage

THD

(%)

1

−1

10

−2

10

10 10

Po= 0.5 W; Gv= 20 dB.
(1) VCC= 5 V; RL=8Ω.

Fig.7 THD as a function of frequency.

(1)

2

3

10

MGK989

4

10

f (Hz)

10

TDA8547TS

−60

ndbook, halfpage

α

cs

(dB)

−70

−80

−90

5

−100
10 10

VCC= 5 V; Vo= 2 V; RL=8Ω.
(1) Gv=30dB.
(2) Gv=20dB.
(3) Gv= 6 dB.

2

3

10

Fig.8 Channel separation as a function of

frequency.

MGK699

(1)

(2)

(3)

4

10

f (Hz)

5

10

−20

handbook, halfpage

SVRR

(dB)

−40

−60

−80

10 10

VCC= 5 V; RS=0Ω; Vr= 100 mV.
(1) Gv=30dB.
(2) Gv=20dB.
(3) Gv= 6 dB.

2

10

Fig.9 SVRR as a function of frequency.

VCC (V)

MGK990

12

MGD894

(1)

(2)

(3)

3

4

10

f (Hz)

5

10

handbook, halfpage

2

P

o

(W)

1.5

(1) (2)

1

0.5

0

048

THD = 10%.
(1) RL=8Ω.
(2) RL=16Ω.

Fig.10 Po as a function of VCC.

1998 Apr 01 11

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

1.5

handbook, halfpage

P

(W)

1.0

0.5

0

0

(1) RL=8Ω.
(2) RL=16Ω.

(2)

(1)

4812

MGK991

VCC (V)

1.5

handbook, halfpage

P

(W)

1

0.5

0

0

Sine wave of 1 kHz.
(1) VCC= 5 V; RL=8Ω.

0.5

TDA8547TS

MGK992

(1)

1 1.5

Po (W)

Fig.11 Worst case power dissipation as a function

of VCC (one channel active).

V

MODE

MGL211

(V)

10

handbook, halfpage

V

o

(V)

1

−1

10

−2

10

−3

10

−4

10

−5

10

−6

10

−1

10

Band-pass = 22 Hz to 22 kHz.
(1) VCC=3V.
(2) VCC=5V.
(3) VCC=12V.

(1) (2) (3)

1

10 10

Fig.12 Power dissipation as a function of P

o

(one channel active).

mute

12

MGL210

operating

VP (V)

16

16

handbook, halfpage

V

MODE

(V)

12

8

4

2

0

048

standby

Fig.13 Vo as a function of V

MODE

.

1998 Apr 01 12

Fig.14 V

as a function of VP.

MODE

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

20

handbook, full pagewidth

V

SELECT

(V)

16

12

8

4

0

02468 12141618

V

P

channel 1

on

channel 1

standby

10

channel 2

standby

channel 2

on

TDA8547TS

MGK700

channel 1 + 2

on

VP (V)

20

SE APPLICATION

handbook, full pagewidth

Gain channel 1

Gain channel 2

=

=

R2

------- ­R1

R4

------- ­R3

C1

1 µF

V

C2

1 µF

V

i1

i2

R1

10 kΩ

R3

10 kΩ

R2

R4

100 kΩ

C3

47 µF

100 kΩ

OUT2−

Fig.15 V

IN1−
IN1+

IN2−
IN2+

SVRR

MODE

SELECT

as a function of VP.

SELECT

20 11

17
16

TDA8547TS

14
15

5
4
6

110

GND

V

R

L1

R

L2

C5
100 µF

CC

C4

100 nF

OUT1−

18

OUT1+

3

OUT2−

13

OUT2+

8

MGK986

C6

470 µF

C7

470 µF

Fig.16 SE application.

1998 Apr 01 13

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

Po (W)

MGD899

10

10

handbook, halfpage

THD

(%)

1

−1

10

−2

10

−2

10

f = 1 kHz; Gv=20dB.
(1) VCC= 7.5 V; RL=4Ω.
(2) VCC= 9 V; RL=8Ω.
(3) VCC= 12 V; RL=16Ω.

(1)
(2)
(3)

−1

10

1

10

handbook, halfpage

THD

(%)

1

−1

10

−2

10

10 10

Po= 0.5 W; Gv= 20 dB.
(1) VCC= 7.5 V; RL=4Ω.
(2) VCC= 9 V; RL=8Ω.
(3) VCC= 12 V; RL=16Ω.

TDA8547TS

MGD900

(1)

(2)
(3)

2

3

10

4

10

f (Hz)

5

10

Fig.17 THD as a function of Po.

−40

handbook, halfpage

α

cs

(dB)

−60

(1)
(2)

−80

−100

10

2

10

(3)
(4)

3

10

10

Vo= 1 V; Gv=20dB.
(1) VCC= 7.5 V; RL=4Ω.
(2) VCC= 9 V; RL=8Ω.
(3) VCC= 12 V; RL=16Ω.
(4) VCC= 5 V; RL=32Ω.

Fig.19 Channel separation as a function of

frequency.

4

MGK993

f (Hz)

Fig.18 THD as a function of frequency.

−20

handbook, halfpage

SVRR

(dB)

−40

(1)
(2)

−60

(3)

5

10

−80
10 10

2

3

10

VCC= 7.5 V; RL=4Ω; RS=0Ω; Vr= 100 mV.
(1) Gv=24dB.
(2) Gv=20dB.
(3) Gv= 0 dB.

MGD902

4

10

f (Hz)

5

10

Fig.20 SVRR as a function of frequency.

1998 Apr 01 14

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

12

MGK994

VCC (V)

16

handbook, halfpage

2

P

o

(W)

1.6

1.2

0.8

0.4

0

0

THD = 10%.
(1) RL=4Ω.
(2) RL=8Ω.
(3) RL=16Ω.

(1) (2) (3)

48

Fig.21 Po as a function of VCC.

TDA8547TS

1.5

handbook, halfpage

P

(W)

1.0

(1) (2) (3)

0.5

0

0

(1) RL=4Ω.
(2) RL=8Ω.
(3) RL=16Ω.

48

Fig.22 Worst case power dissipation as a function

of VCC (one channel active).

MGK995

VCC (V)

1612

1.2

handbook, halfpage

P

(W)

0.8

0.4

0

0

Sine wave of 1 kHz.
(1) VCC= 12 V; RL=16Ω.
(2) VCC= 7.5 V; RL=4Ω.
(3) VCC= 9 V; RL=8Ω.

0.4 0.8 1.6

(1)

(2)
(3)

1.2

Fig.23 Power dissipation as a function of P

(one channel active).

MGK996

Po (W)

o

1998 Apr 01 15

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

handbook, full pagewidth

TDA8547TS

IN1

IN2

a. Top view copper layout.

1 µF

1 µF

−OUT1

11 kΩ

11 kΩ

−OUT2

56 kΩ

56 kΩ

+V

CC

20

11

8542/47TS

100 µF

100 nF

TDA

GND

10 kΩ

1

10

b. Top view components layout.

+OUT1

10 kΩ

47 µF

+OUT2

TDA
8542TS
8547TS

MODE

SELECT

CIC

Nijmegen

MGK997

Fig.24 Printed-circuit board layout (BTL).

1998 Apr 01 16

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

PACKAGE OUTLINE

SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm

20

D

c

y

Z

11

E

H

TDA8547TS

SOT266-1

A

X

v M

E

A

pin 1 index

110

w M

b

e

DIMENSIONS (mm are the original dimensions)

UNIT A1A

mm

Note

1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.

A

max.

1.5

0.1501.4

1.2

A

0.25

b

3

p

0.32

0.20

2

p

0 2.5 5 mm

scale

(1)E(1)

cD

0.20

6.6

6.4

4.5

4.3

0.13

eHELLpQZywv θ

0.65 1.0 0.2

6.6

6.2

Q

A

2

A

1

detail X

0.75

0.65

0.45

0.45

(A )

L

p

L

A

3

θ

0.13 0.1

0.48

0.18

(1)

o

10

o

0

OUTLINE

VERSION

SOT266-1

IEC JEDEC EIAJ

REFERENCES

1998 Apr 01 17

EUROPEAN

PROJECTION

ISSUE DATE

90-04-05
95-02-25

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with
output channel switching

SOLDERING
Introduction

There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our

“IC Package Databook”

DIP

SOLDERING BY DIPPING OR BY WA VE
The maximum permissible temperature of the solder is

260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.

R

EPAIRING SOLDERED JOINTS

Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.

SO

REFLOW SOLDERING
Reflow soldering techniques are suitable for all SO

packages.

(order code 9398 652 90011).

). If the

stg max

TDA8547TS

Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.

Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.

AVE SOLDERING

W
Wave soldering techniques can be used for all SO

packages if the following conditions are observed:

• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.

• The longitudinal axis of the package footprint must be
parallel to the solder flow.

• The package footprint must incorporate solder thieves at
the downstream end.

During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.

Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.

A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.

R

EPAIRING SOLDERED JOINTS

Fix the component by first soldering two diagonally­opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.

Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.

1998 Apr 01 18

Philips Semiconductors Product specification

2 × 0.7 W BTL audio amplifier with

TDA8547TS

output channel switching

DEFINITIONS

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

1998 Apr 01 19

Philips Semiconductors – a worldwide company

Argentina: see South America
Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113,

Tel. [phone], Fax. [phone]
Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. [phone],

Fax. [phone]
Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6,

220050 MINSK, Tel. [phone], Fax. [phone]

Belgium: see The Netherlands
Brazil: see South America
Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor,

51 James Bourchier Blvd., 1407 SOFIA,
Tel. [phone], Fax. [phone]

Canada: PHILIPS SEMICONDUCTORS/COMPONENTS,
Tel. [phone]

China/Hong Kong: 501 Hong Kong Industrial Technology Centre,
72 Tat Chee Avenue, Kowloon Tong, HONG KONG,
Tel. [phone], Fax. [phone]

Colombia: see South America
Czech Republic: see Austria
Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S,

Tel. [phone], Fax. [phone]
Finland: Sinikalliontie 3, FIN-02630 ESPOO,

Tel. [phone], Fax. [phone]
France: 4 Rue du Port-aux-Vins, BP317, 92156 SURESNES Cedex,

Tel. [phone], Fax. [phone]
Germany: Hammerbrookstraße 69, D-20097 HAMBURG,

Tel. [phone], Fax. [phone]
Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS,

Tel. [phone], Fax. [phone]

Hungary: see Austria
India: Philips INDIA Ltd, Band Box Building, 2nd floor,

254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025,
Tel. [phone], Fax. [phone]

Indonesia: see Singapore
Ireland: Newstead, Clonskeagh, DUBLIN 14,

Tel. [phone], Fax. [phone]
Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053,

TEL AVIV 61180, Tel. [phone], Fax. [phone]
Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3,

20124 MILANO, Tel. [phone], Fax. [phone]
Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108,

Tel. [phone], Fax. [phone]
Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL,

Tel. [phone], Fax. [phone]
Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR,

Tel. [phone], Fax. [phone]
Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905,

Tel. [phone]

Middle East: see Italy

Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB,

Tel. [phone], Fax. [phone]
New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND,

Tel. [phone], Fax. [phone]
Norway: Box 1, Manglerud 0612, OSLO,

Tel. [phone], Fax. [phone]
Philippines: Philips Semiconductors Philippines Inc.,

106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI,
Metro MANILA, Tel. [phone], Fax. [phone]

Poland: Ul. Lukiska 10, PL 04-123 WARSZAWA,
Tel. [phone], Fax. [phone]

Portugal: see Spain
Romania: see Italy
Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW,

Tel. [phone], Fax. [phone]
Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231,

Tel. [phone], Fax. [phone]

Slovakia: see Austria
Slovenia: see Italy
South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale,

2092 JOHANNESBURG, P.O. Box 7430 Johannesburg 2000,
Tel. [phone], Fax. [phone]

South America: Rua do Rocio 220, 5th floor, Suite 51,
04552-903 São Paulo, SÃO PAULO - SP, Brazil,
Tel. [phone], Fax. [phone]

Spain: Balmes 22, 08007 BARCELONA,
Tel. [phone], Fax. [phone]

Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM,
Tel. [phone], Fax. [phone]

Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH,
Tel. [phone], Fax. [phone]

Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1,
TAIPEI, Taiwan Tel. [phone], Fax. [phone]

Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd.,
209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260,
Tel. [phone], Fax. [phone]

Turkey: Talatpasa Cad. No. 5, 80640 GÜLTEPE/ISTANBUL,
Tel. [phone], Fax. [phone]

Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7,
252042 KIEV, Tel. [phone], Fax. [phone]

United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes,
MIDDLESEX UB3 5BX, Tel. [phone], Fax. [phone]

United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. [phone]

Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,

Tel. [phone], Fax.[phone]

For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications,
Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. [phone]

© Philips Electronics N.V. 1997 SCA55
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.

Internet: http://www.semiconductors.philips.com

Printed in The Netherlands 545102/00/02/pp20 Date of release: 1998 Apr01 Document order number: 9397 75003347