Datasheet TDA8942P Datasheet (Philips)

TDA8942P

2 x 1.5 W stereo Bridge Tied Load (BTL) audio amplifier

Rev. 02 — 14 March 2000 Product specification

1. General description

The TDA8942P is a dual-channel audio power amplifier for an output power of
2 × 1.5 W at a 16 Ω load and a 9 V supply.The circuit contains two Bridge Tied Load
(BTL) amplifiers with an all-NPN output stage and standby/mute logic.
The TDA8942P comes in a 16-pin dual in-line (DIP) package.The TDA8942P is
printed-circuit board (PCB) compatible with all other types in the TDA894x family.
One PCB footprint accommodates both the mono and the stereo products.

2. Features

■ Few external components

■ Fixed gain

■ Standby and mute mode

■ No on/off switching plops

■ Low standby current

■ High supply voltage ripple rejection

■ Outputs short-circuit protected to ground, supply and across the load

c

c

■ Thermally protected

■ Printed-circuit board compatible.

3. Applications

■ Mains fed applications (e.g. TV sound)

■ PC audio

■ Portable audio.

4. Quick reference data

Table 1: Quick reference data

Symbol Parameter Conditions Min Typ Max Unit

V

CC

I

q

I

stb

supply voltage 6 9 18 V
quiescent supply current VCC=12V; RL= ∞ - 2232mA
standby supply current - - 10 µA

Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

Table 1: Quick reference data

Symbol Parameter Conditions Min Typ Max Unit

P

o

THD total harmonic distortion P
G

v

SVRR supply voltage ripple

5. Ordering information

Table 2: Ordering information

Type number Package

TDA8942P DIP16 plastic dual in-line package; 16 leads (300 mil);

6. Block diagram

dth

…continued

output power THD = 10%;RL=16Ω;

=9V

V

CC

= 0.5 W - 0.03 0.3 %

o

1.2 1.5 - W

voltage gain 31 32 33 dB

50 65 - dB

rejection

Name Description Version

SOT38-1

long body

CC1

V

CC2

V

IN1−
IN1+

IN2−
IN2+

MODE

SVR

Fig 1. Block diagram.

13
3

12
11

4

STANDBY/

MUTE LOGIC

14

1

TDA8942P

9

V

CC

20

kΩ

SHORT CIRCUIT

TEMPERATURE

20

kΩ

GND18GND2

PROTECTION

16

AND

15

10

MGL578

OUT1−

2

OUT1+

7

OUT2−

OUT2+

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Product specification Rev. 02 — 14 March 2000 2 of 23

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7. Pinning information

7.1 Pinning

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

handbook, halfpage

V

CC1

OUT1+

IN1+

MODE

n.c.
n.c.

OUT2−

GND2

1
2
3
4

TDA8942P

5
6
7
8

MGR895

16
15
14
13
12
11
10

9

GND1
OUT1−
SVR
IN1−
IN2−
IN2+
OUT2+
V

CC2

Fig 2. Pin configuration.

7.2 Pin description

Table 3: Pin description

Symbol Pin Description

V

CC1

OUT1+ 2 positive loudspeaker terminal 1
IN1+ 3 positive input 1
MODE 4 mode selection input (standby, mute, operating)
n.c. 5 not connected
n.c. 6 not connected
OUT2− 7 negative loudspeaker terminal 2
GND2 8 ground channel 2
V

CC2

OUT2+ 10 positive loudspeaker terminal 2
IN2+ 11 positive input 2
IN2− 12 negative input 2
IN1− 13 negative input 1
SVR 14 half supply voltage decoupling (ripple rejection)
OUT1− 15 negative loudspeaker terminal 2
GND1 16 ground channel 1

1 supply voltage channel 1

9 supply voltage channel 2

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8. Functional description

The TDA8942P is a stereo BTL audio power amplifier capable of delivering 2 × 1.5 W
output power to a 16 Ω load at THD = 10%, using a 9 V power supply. The voltage
gain is fixed at 32 dB.

With the three-level MODE input the device can be switched from ‘standby’ to ‘mute’
and to ‘operating’ mode.

The TDA8942P outputs are protected by an internal thermal shutdown protection
mechanism and a short-circuit protection.

8.1 Input configuration

The TDA8942P inputs can be driven symmetrical (floating) as well as asymmetrical.
In the asymmetrical mode one input pin is connected via a capacitor to the signal
ground which should be as close as possible to the SVR (electrolytic) capacitor
ground. Note that the DC level of the input pins is half of the supply voltage VCC, so
coupling capacitors for both pins are necessary.

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

The input cut-off frequency is:

f

i cut off–()

For Ri=45kΩ and Ci= 220 nF:

f

i cut off–()

As shown in Equation 1 and 2, large capacitor values for the inputs are not
necessary; so the switch-on delay during charging of the input capacitors, can be
minimized. This results in a good low frequency response and good switch-on
behaviour.

Remark: To prevent HF oscillations do not leave the inputs open, connect a capacitor
of at least 1.5 nF across the input pins close to the device.

=

1

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

2π RiCi×()

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

2π 45 103× 220× 109–×()

1

16 Hz==

(1)

(2)

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8.2 Power amplifier

The power amplifier is a Bridge Tied Load (BTL) amplifier with an all-NPN output
stage, capable of delivering a peak output current of 2 A.

The BTL principle offers the following advantages:

•

•

•

•

8.2.1 Output power measurement

The output power as a function of the supply voltage is measured on the output pins
at THD = 10%; see Figure 8. The maximum output power is limited by the maximum
powerdissipation in the plastic dual in-line (DIP16) package.See also Section 14.2 on

page 16.

8.2.2 Headroom

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

Lower peak value of the supply current
The ripple frequency on the supply voltage is twice the signal frequency
No expensive DC-blocking capacitor
Good low frequency performance.

Typical CD music requires at least 12 dB (factor 15.85) dynamic headroom –
compared to the average power output – for transferring the loudest parts without
distortion. At VCC=9V, RL=16Ω and Po= 1 W at THD = 1% (see Figure 6a), the
Average Listening Level (ALL) – music power – without any distortion yields:

P

= 1 W/15.85 = 63 mW.

o(ALL)

The power dissipation can be derived from Figure 11 on page 11 for 0 dB
respectively 12 dB headroom.

Table 4: Power rating as function of headroom

Headroom Power output (THD = 0.1%) Power dissipation (P)

0dB P
12 dB P

= 1 W 2.35 W

o

= 63 mW 1.15 W

o(ALL)

For the average listening level a power dissipation of 1.15 W can be used for
calculation of the maximum ambient temperature T

amb(max)

(see Section 14.2).

8.3 Mode selection

The TDA8942P has three functional modes, which can be selected by applying the
proper DC voltage to pin MODE. See Figure 4 and 5 for the respective DC levels,
which depend on the supply voltage level. The MODE pin can be driven by a 3-state
logic output stage: e.g. a microcontroller with additional components for DC-level
shifting.

Standby — In this mode the current consumption is very low and the outputs are
floating. The device is in standby mode when (VCC− 0.5 V) < V

MODE<VCC

, or when
the MODE pin is left floating (high impedance). The power consumption of the
TDA8942P will be reduced to <0.18 mW.

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Mute — In this mode the amplifier is DC-biased but not operational (no audio output);

the DC level of the input and output pins remain on half the supply voltage. This
allows the input coupling and Supply Voltage Ripple Rejection (SVRR) capacitors to
be charged to avoid pop-noise. The device is in mute mode when
3V<V

Operating — In this mode the amplifier is operating normally. The operating mode is
activated at V

8.3.1 Switch-on and switch-off

To avoid audible plops during supply voltage switch-on or switch-off, the device is set
to standby mode before the supply voltage is applied (switch-on) or removed
(switch-off).

The switch-on and switch-off time can be influenced by an RC-circuit on the MODE
pin. Rapid on/off switching of the device or the MODE pin may cause ‘click- and
pop-noise’. This can be prevented by proper timing of the RC-circuit on the MODE
pin.

<(VCC− 1.5 V).

MODE

MODE

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

< 0.5 V.

8.4 Supply Voltage Ripple Rejection (SVRR)

The SVRR is measured with an electrolytic capacitor of 10 µF on pin SVR at a
bandwidth of 10 Hz to 80 kHz. Figure 13 on page 12 illustrates the SVRR as function
of the frequency.A larger capacitor value on the SVR pin improves the ripple rejection
behaviour at the lower frequencies.

8.5 Built-in protection circuits

The TDA8942P contains two types of protection circuits, i.e. short-circuit and thermal
shutdown.

8.5.1 Short-circuit protection

Short-circuit to ground or supply line — This is detected by a so-called ‘missing

current’ detection circuit which measures the current in the positive supply line and
the current in the ground line. A difference between both currents larger than 0.4 A,
switches the power stage to standby mode (high impedance).

Short-circuit across the load — This is detected by an absolute-current
measurement. An absolute-current larger than 2 A, switches the power stage to
standby mode (high impedance).

8.5.2 Thermal shutdown protection

The junction temperature is measured by a temperature sensor; at a junction
temperature of approximately 150 °C this detection circuit switches the power stage
to standby mode (high impedance).

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TDA8942P

2 x 1.5 W stereo BTL audio amplifier

9. Limiting values

Table 5: Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter Conditions Min Max Unit

V

CC

supply voltage no signal −0.3 +25 V

operating −0.3 +18 V

V

I

I

ORM

T

stg

T

amb

P

tot

V

CC(sc)

input voltage −0.3 VCC+ 0.3 V
repetitive peak output current - 2 A
storage temperature non-operating −55 +150 °C
operating ambient temperature −40 +85 °C
total power dissipation - 2.2 W
supplyvoltage to guaranteeshort-circuit

-12V

protection

10. Thermal characteristics

Table 6: Thermal characteristics

Symbol Parameter Conditions Value Unit

R

th(j-a)

thermal resistance from junction to ambient in free air 57 K/W

11. Static characteristics

Table 7: Static characteristics

VCC=12V; T

Symbol Parameter Conditions Min Typ Max Unit

V

CC

I

q

I

stb

V

O

[3]

∆V

OUT

V

MODE

I

MODE

[1] With a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal to the differential

output voltage offset (∆V
[2] The DC output voltage with respect to ground is approximately 0.5VCC.
[3] ∆V

OUT

=25°C; RL=8Ω; V

amb

supply voltage operating 6 9 18 V
quiescent supply current RL= ∞
standby supply current V
DC output voltage
differential output voltage offset - - 200 mV
mode selection input voltage operating mode 0 - 0.5 V

mode selection input current 0 < V

= V

OUT+

− V

=0V; Vi= 0 V; measured in test circuit Figure 14; unless otherwise specified.

MODE

) divided by the load resistance (RL).

OUT



OUT−

[1]

- 2232mA

MODE=VCC

--10µA

[2]

- 4.5 - V

mute mode 3 - V
standby mode V

MODE<VCC

− 0.5 - V

CC

--20µA

− 1.5 V

CC
CC

V

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TDA8942P

2 x 1.5 W stereo BTL audio amplifier

50

handbook, halfpage

I

q

(mA)

40

30

20

10

0

0481216

MGL990

VCC (V)

20

Fig 3. Quiescent supply current as function of supply

voltage.

50

handbook, halfpage

I

q

(mA)

40

30

20

10

0

02468

VCC = 11 V

9 V

Fig 4. Quiescent supply current as function of mode

voltage.

MGL991

10 12

V

MODE

(V)

12. Dynamic characteristics

Table 8: Dynamic characteristics

VCC=12V; T
22 Hz to 22 kHz; unless otherwise specified.

Symbol Parameter Conditions Min Typ Max Unit

P

o

THD total harmonic distortion P
G

v

Z

i(dif)

V

n(o)

SVRR supply voltage ripple rejection f

V

o(mute)

α

cs

=25°C; RL=8Ω; f = 1 kHz; V

amb

= 0 V; measured in test circuit Figure 14; audio pass band

MODE

output power THD = 10% 1.2 1.5 - W

THD = 0.5% 0.8 1 - W

= 0.5 W - 0.03 0.3 %

o

voltage gain 31 32 33 dB
differential input impedance 70 90 110 kΩ
noise output voltage

ripple

f

ripple

= 1 kHz
= 100 Hz

[1]

- 90 120 µV

[2]

50 65 - dB

[2]

-60-dB

to 20 kHz

output voltage mute mode

[3]

--50µV

channel separation RS=0Ω 50 75 - dB

[1] The noise output voltage is measured at the output in a frequency range from 20 Hz to 20 kHz (unweighted), with a source impedance

RS=0Ω at the input.
[2] Supply voltage ripple rejection is measured at the output, with a source impedance RS=0Ω at the input. The ripple voltage is a sine

wave with a frequency f

and an amplitude of 700 mV (RMS), which is applied to the positive supply rail.

ripple

[3] Output voltage in mute mode is measured with an input voltage of 1 V (RMS) in a bandwidth of 20 kHz, so including noise.

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Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

10

handbook, full pagewidth

V

o

(V)

1

−1

10

−2

10

−3

10

−4

10

−5

10

Fig 5. Output voltage as function of mode voltage.

2

10

handbook, halfpage

THD

(%)

10

MGL986

2

10

handbook, halfpage

THD

(%)

10

VCC = 11 V

8426100

9 V

V

MODE

MGL993

(V)

MGL987

12

1

−1

10

−2

10

−2

10

CH2

CH1

−1

Po (W)

10110

1

−1

10

CH2
CH1

−2

10

−2

10

−1

Po (W)

10110

a. VCC=9V; RL=16Ω; f = 1 kHz. b. VCC=11V; RL=25Ω; f = 1 kHz.

Fig 6. Total harmonic distortion as function of output power.

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Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

10

handbook, halfpage

THD

(%)

1

−1

10

−2

10

10 10

CH2

CH1

2

10

3

10

MGL989

4

10

5

f (Hz)

10

handbook, halfpage

THD

(%)

1

−1

10

−2

10

10 10

CH2

CH1

2

10

3

10

a. VCC=9V; RL=16Ω; Po= 0.1 W. b. VCC=9V; RL=16Ω; Po= 0.5 W.

No bandpass filter applied.

Fig 7. Total harmonic distortion as function of frequency.

MGL995

P

(W)

3

tot

2.5

handbook, halfpage

P

(W)

3

o

2.5

handbook, halfpage

MGL988

4

10

5

f (Hz)

MGL996

2

1.5

1

0.5

0

02468

RL = 16 Ω

25 Ω

VCC (V)

2

1.5

1

0.5

1410 12

0

02468

RL = 16 Ω

25 Ω

1410 12

VCC (V)

THD = 10%; f = 1 kHz. f = 1 kHz.

Fig 8. Output power as function of supply voltage. Fig 9. Total power dissipation as function of supply

voltage.

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Product specification Rev. 02 — 14 March 2000 10 of 23

Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

100

handbook, halfpage

η

(%)

80

60

40

20

0

0 0.5 1 1.5 2

(1) VCC=9V.
(2) V

CC

=11V.

(1)
(2)

MGL998

Po (W)

2.5

handbook, halfpage

3

P

(W)

2.5

2

1.5

1

0.5

0

0 0.5 1 1.5 2

(1) V

CC

(2) V

CC

=9V; RL=16Ω.
= 11 V; RL=25Ω.

(1)
(2)

MGL997

Po (W)

2.5

Fig 10. Efficiency as function of output power. Fig 11. Power dissipation as function of output power.

MGL994

α

(dB)

0

cs

−20

handbook, halfpage

−40

−60

−80

−100

10 10

2

No bandpass filter applied.

Fig 12. Channel separation as function of frequency.

3

10

4

10

f (Hz)

5

10

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Product specification Rev. 02 — 14 March 2000 11 of 23

Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

handbook, full pagewidth

0

SVRR

(dB)

−20

−40

−60

−80

B

A

10

VCC=9V; RS=0Ω; V

2

10

= 700 mV (RMS); no bandpass filter applied.

ripple

3

10

Curves A: inputs short-circuited
Curves B: inputs short-circuited and connected to ground (asymmetrical application)

Fig 13. Supply voltage ripple rejection as function of frequency.

MGL992

CH1

CH2

4

10

f (Hz)

5

10

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Product specification Rev. 02 — 14 March 2000 12 of 23

Philips Semiconductors

13. Internal circuitry

Table 9: Internal circuitry

Pin Symbol Equivalent circuit

3 and 13 IN1+ and IN1−
11 and 12 IN2+ and IN2−

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

V

CC

15 and 2 OUT1− and OUT1+
7 and 10 OUT2− and OUT2+

4 MODE

V

CC

13, 12 3, 11

40 Ω

V

1/2 V

CC

CC

1.5 kΩ 1.5 kΩ

45 kΩ 45 kΩ

1/2 V

CC

(SVR)

100 Ω

MGU071

V

CC

20 kΩ

2, 7, 10, 15

1 kΩ

V

CC

MGU070

V

CC

1 kΩ

4

OFF

HIGH

MUTE

HIGH

MGU073

14 SVR

V

CC

Standby

20 kΩ

14

20 kΩ

MGU072

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14. Application information

220 nF

R

s

Symmetrical
input

R

Asymmetrical
input

signal

GND

C

i

1.5

220 nF
220 nF

s

C

i

220 nF

1.5

V

CC

R

IN1−

nF

IN1+

IN2−

nF

IN2+

MODE

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

+V

CC

100 nF

13

R

i

45 kΩ

1/2 V

R

i

45 kΩ

3

1

CC

TDA8942P

12

R

i

45 kΩ

1/2 V

CC

R

i

45 kΩ

11

4

STANDBY/

MUTE LOGIC

9

30 kΩ

−

1/2 V

1/2 V

+

CC

+

−

30 kΩ

−
+

CC

+

−

30 kΩ

−
+

−

+

−
+

−

+

V

CC

15

10

2

7

OUT1−

OUT1+

OUT2−

OUT2+

1000 µF

R

L

16 Ω

R

L

16 Ω

C1

MICROCONTROLLER

C2

On

C1 C2

0
0
1

0
1
0

MODE

Standby

Mute

Fig 14. Application diagram.

14.1 Printed-circuit board (PCB)

14.1.1 Layout and grounding

R

signal

GND

SVR

10
µF

20 kΩ

1/2 V

14

gewidth

CC

20 kΩ

SHORT CIRCUIT

AND

TEMPERATURE

PROTECTION

816

GND

MGL999

For a high system performance level certain grounding techniques are essential.
The input reference grounds have to be tied with their respective source grounds and
must have separate tracks from the power ground tracks; this will prevent the large
(output) signal currents from interfering with the small AC input signals.
The small-signal ground tracks should be physically located as far as possible from
the power ground tracks. Supply and output tracks should be as wide as possible for
delivering maximum output power.

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Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

dth

54 mm

56 mm

OUT1+

OUT1−

+−

10 µF

1

220 nF

1.5 nF

ON

MUTE

IN1−

IN1+

IN2−

220 nF

OUT2+

100 nF

OUT2−

IN2+

1000 µF

V

CC

GND

MGU067

Fig 15. Printed-circuit board layout (single-sided); components view.

14.1.2 Power supply decoupling

Proper supply bypassing is critical for low-noise performance and high supply voltage
ripple rejection. The respective capacitor locations should be as close as possible to
the device and grounded to the power ground. Proper power supply decoupling also
prevents oscillations.

For suppressing higher frequency transients (spikes) on the supply line a capacitor
with low ESR – typical 100 nF – has to be placed as close as possible to the device.
For suppressing lower frequency noise and ripple signals, a large electrolytic
capacitor – e.g. 1000 µF or greater – must be placed close to the device.

The bypass capacitor on the SVR pin reduces the noise and ripple on the midrail
voltage. For good THD and noise performance a low ESR capacitor is recommended.

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Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

14.2 Thermal behaviour and T

The measured maximum thermal resistance of the IC package, R
A calculation for the maximum ambient temperature can be made, with the following
parameters:

VCC= 9 V and RL=16Ω
T

= 150 °C.

j(max)

R

is the total thermal resistance between the junction and the ambient.

th(tot)

At VCC= 9 V and RL=16Ω the measured worst-case sine-wave dissipation is

2.35 W; see Figure 11. For T
T

amb(max)

= 150 – 2.35 × 57=16°C

The calculation above is for an application at worst-case (stereo) sine-wave output
signals. In practice music signals will be applied, which decreases the maximum
power dissipation to approximately half of the sine-wave power dissipation (see

Section 8.2.2). For T

T

amb(max)

= 150 – 1.15 × 57 = 84.5 °C

j(max)

To increase the lifetime of the IC, T

T

amb(max)

= 125 – 1.15 × 57 = 59.5 °C

j(max)

= 150 °C the maximum ambient temperature is:

amb(max)

calculation

is 57 K/W.

th(j-a)

= 150 °C the maximum ambient temperature is:

should be reduced to 125 °C. This results in:

j(max)

15. Test information

15.1 Quality information

The
applicable.

15.2 Test conditions

T

amb

unless otherwise specified.
Remark: In the graphs as function of frequency no bandpass filter was applied; see

Figure 7, 12 and 13.

General Quality Specification for Integrated Circuits, SNW-FQ-611D

is

=25°C; VCC= 9 V; f = 1 kHz; RL=16Ω; audio pass band 22 Hz to 22 kHz;

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16. Package outline

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

DIP16: plastic dual in-line package; 16 leads (300 mil); long body

D

seating plane

L

Z

16

pin 1 index

e

b

b

1

9

A

w M

SOT38-1

M

E

A

2

A

1

c

(e )

1

M

H

E

1

0 5 10 mm

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

A

A

UNIT

inches

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

mm

OUTLINE
VERSION

SOT38-1

max.

4.7 0.51 3.7

1 2

min.

max.

1.40

1.14

0.055

0.15

0.045

IEC JEDEC EIAJ

050G09 MO-001 SC-503-16

b

b

0.53

0.38

0.021

0.015

cEe M

1

0.32

0.23

0.013

0.009

REFERENCES

D

21.8

21.4

0.86

0.84

8

scale

(1) (1)

6.48

6.20

0.26

0.24

e

0.30

1

3.9

3.4

0.15

0.13

E

8.25

7.80

0.32

0.31

EUROPEAN

PROJECTION

9.5

8.3

0.37

0.33

M

L

H

w

max.

0.2542.54 7.62

0.087

0.010.100.0200.19

ISSUE DATE

95-01-19
99-12-27

2.2

(1)

Z

Fig 16. DIP16 package outline.

9397 750 06862

Product specification Rev. 02 — 14 March 2000 17 of 23

© Philips Electronics N.V. 2000. All rights reserved.

Philips Semiconductors

17. Soldering

17.1 Introduction to soldering through-hole mount packages

This text gives a brief insight to wave, dip and manual soldering. A more in-depth
account of soldering ICs can be found in our

Packages

Wave soldering is the preferred method for mounting of through-hole mount IC
packages on a printed-circuit board.

17.2 Soldering by dipping or by solder wave

The maximum permissible temperature of the solder is 260 °C; solder at this
temperature must not be in contact with the joints 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
If the printed-circuit board has been pre-heated, forced cooling may be necessary
immediately after soldering to keep the temperature within the permissible limit.

2 x 1.5 W stereo BTL audio amplifier

Data Handbook IC26; Integrated Circuit

(document order number 9398 652 90011).

TDA8942P

).

stg(max)

17.3 Manual soldering

Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the
seating plane or not more than 2 mm above it. If the temperature of the solderingiron
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.

17.4 Package related soldering information

Table 10: Suitability of through-hole mount IC packages for dipping and wave soldering

methods

Package Soldering method

Dipping Wave

DBS, DIP, HDIP, SDIP, SIL suitable suitable

[1] For SDIP packages, the longitudinal axis must be parallel to the transport direction of the

printed-circuit board.

[1]

9397 750 06862

Product specification Rev. 02 — 14 March 2000 18 of 23

© Philips Electronics N.V. 2000. All rights reserved.

Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

18. Revision history

Table 11: Revision history

Rev Date CPCN Description

02 20000314 - Product specification; second version; supersedes initial version TDA8942P-01 of

14 April 1999 (9397 750 04879). Modifications:

Table 1 on page 1:THD: Max value 0.1% changed to → 0.3%;

•

SVRR: Typ value 65 dB → added
Ordering options removed

•

Figure 1 on page 2: Block diagram; pin numbers changed OUT2−→ 7 and OUT2+ → 10

•

Figure 2 on page 3: Pin configuration; pin numbers changed OUT2−→ 7 and OUT2+ → 10

•

Table 3 on page 3: Pin description; pin numbers changed OUT2−→ 7 and OUT2+ → 10

•

Section 8 “Functional description”:

•

– Section 8.1 “Input configuration” on page 4 → added.

– Section 8.2 “Power amplifier” on page 5: ........, capable of delivering a peak output

current of 1.5 A → changed to 2 A.

– Section 8.2.1 “Output power measurement” on page 5 → added
– Section 8.2.2 “Headroom” on page 5 → added

Section 8.3 “Mode selection”:

•

– Standby mode: V

power consumption of the TDA8942P will be reduced to <0.18 mW → added.

– Mute mode: the DC level of the input and output pins remain on half the supply

voltage → added;

– 2.5 V < V
– Section 8.3.1 “Switch-on and switch-off” on page 6 → added.

Section 8.4 “Supply Voltage Ripple Rejection (SVRR)” on page 6 → added

•

Section 8.5 “Built-in protection circuits” on page 6 → added

•

Table 5 on page 7:

•

– P

value added 2.2 W

tot

– V

Table 6 on page 7: R

•

Table 7 on page 7: V

•

Table 8 on page 8:

•

– THD: Max value 0.1% changed to → 0.3%
– SVRR; Typ values 65 and 60 dB → added
– α
– R

– Table note [2]: .... 100 mV (RMS).... changed to → ... 700 mV (RMS)....

Figure 3 to 13: figures added

•

Section 13 “Internal circuitry” on page 13: → added

•

Figure 14: figure modified

•

value added 12 V

CC(sc)

; Typ value 75 dB → added

cs

changed to → RSin table and associated table notes; Value added RS=0Ω;

source

<(VCC− 1.5 V) → changed to 3 V < V

MODE

>(VCC− 0.5 V) → changed to (VCC− 0.5 V) < V

MODE

MODE

value 55 K/W changed to → 57 K/W

th(j-a)

- mute mode - value Min 2.5 → changed to 3 V

MODE

MODE<VCC

<(VCC− 1.5 V)

; The

9397 750 06862

Product specification Rev. 02 — 14 March 2000 19 of 23

© Philips Electronics N.V. 2000. All rights reserved.

Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

Table 11: Revision history

Rev Date CPCN Description

02 20000314 - Modifications:

01 19990414 - Preliminary specification; initial version.

…continued

Section 14.1 “Printed-circuit board (PCB)” on page 14: → added

•

Figure 15: figure added

•

Section 14.2 “Thermal behaviour and T

•

Section 15 “Test information” on page 16: Section 15.1 → updated

•

Section 15.2 “Test conditions” on page 16: → added.

•

amb(max)

calculation” on page 16: → added

9397 750 06862

Product specification Rev. 02 — 14 March 2000 20 of 23

© Philips Electronics N.V. 2000. All rights reserved.

Philips Semiconductors

19. Data sheet status

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

Datasheet status Product status Definition

Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may

change in any manner without notice.

Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips

Semiconductors reserves the right to make changes at any time without notice in order to improve design and
supply the best possible product.

Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any

time without notice in order to improve design and supply the best possible product.

[1] Please consult the most recently issued data sheet before initiating or completing a design.

20. Definitions

Short-form specification — The data in a short-form specification is

extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.

Limiting values definition — Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). 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 — Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
make no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.

[1]

21. Disclaimers

Life support — 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 Semiconductors
customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to
make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve
design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
licence or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products
are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

9397 750 06862

© Philips Electronics N.V. 2000 All rights reserved.

Product specification Rev. 02 — 14 March 2000 21 of 23

Philips Semiconductors

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

Philips Semiconductors - a worldwide company

Argentina: see South America
Australia: Tel. [phone], Fax. [phone]
Austria: Tel. [phone], Fax. [phone]
Belarus: Tel. [phone], Fax. [phone]
Belgium: see The Netherlands
Brazil: see South America
Bulgaria: Tel. [phone], Fax. [phone]
Canada: Tel. [phone]
China/Hong Kong: Tel. [phone], Fax. [phone]
Colombia: see South America
Czech Republic: see Austria
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Finland: Tel. [phone], Fax. [phone]
France: Tel. [phone], Fax. [phone]
Germany: Tel. [phone], Fax. [phone]
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Indonesia: see Singapore
Ireland: Tel. [phone], Fax. [phone]
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Italy: Tel. [phone], Fax [phone]
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Korea: Tel. [phone], Fax. [phone]
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Mexico: Tel. [phone]
Middle East: see Italy

Netherlands: Tel. [phone], Fax. [phone]
New Zealand: Tel. [phone], Fax. [phone]
Norway: Tel. [phone], Fax. [phone]
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Portugal: see Spain
Romania: see Italy
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Singapore: Tel. [phone], Fax. [phone]
Slovakia: see Austria
Slovenia: see Italy
South Africa: Tel. [phone], Fax. [phone]
South America: Tel. [phone], Fax. [phone]
Spain: Tel. [phone], Fax. [phone]
Sweden: Tel. [phone], Fax. [phone]
Switzerland: Tel. [phone], Fax. [phone]
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Thailand: Tel. [phone], Fax. [phone]
Turkey: Tel. [phone], Fax. [phone]
Ukraine: Tel. [phone], Fax. [phone]
United Kingdom: Tel. [phone], Fax. [phone]
United States: Tel. [phone]
Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: Tel. [phone], Fax. [phone]

For all other countries apply to: Philips Semiconductors,

International Marketing & Sales Communications,
Building BE, P.O. Box 218, 5600 MD EINDHOVEN,
The Netherlands, Fax. [phone]

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

(SCA69)

9397 750 06862

Product specification Rev. 02 — 14 March 2000 22 of 23

© Philips Electronics N.V. 2000. All rights reserved.

Philips Semiconductors

Contents

1 General description. . . . . . . . . . . . . . . . . . . . . . 1

2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4 Quick reference data . . . . . . . . . . . . . . . . . . . . . 1

5 Ordering information. . . . . . . . . . . . . . . . . . . . . 2

6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2

7 Pinning information. . . . . . . . . . . . . . . . . . . . . . 3

7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3

8 Functional description . . . . . . . . . . . . . . . . . . . 4

8.1 Input configuration . . . . . . . . . . . . . . . . . . . . . . 4

8.2 Power amplifier. . . . . . . . . . . . . . . . . . . . . . . . . 5

8.2.1 Output power measurement . . . . . . . . . . . . . . . 5

8.2.2 Headroom. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

8.3 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . 5

8.3.1 Switch-on and switch-off. . . . . . . . . . . . . . . . . . 6

8.4 Supply Voltage Ripple Rejection (SVRR). . . . . 6

8.5 Built-in protection circuits . . . . . . . . . . . . . . . . . 6

8.5.1 Short-circuit protection . . . . . . . . . . . . . . . . . . . 6

8.5.2 Thermal shutdown protection . . . . . . . . . . . . . . 6

9 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 7

10 Thermal characteristics. . . . . . . . . . . . . . . . . . . 7

11 Static characteristics. . . . . . . . . . . . . . . . . . . . . 7

12 Dynamic characteristics . . . . . . . . . . . . . . . . . . 8

13 Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 13

14 Application information. . . . . . . . . . . . . . . . . . 14

14.1 Printed-circuit board (PCB). . . . . . . . . . . . . . . 14

14.1.1 Layout and grounding. . . . . . . . . . . . . . . . . . . 14

14.1.2 Power supply decoupling . . . . . . . . . . . . . . . . 15

14.2 Thermal behaviour and T

amb(max)

15 Test information. . . . . . . . . . . . . . . . . . . . . . . . 16

15.1 Quality information . . . . . . . . . . . . . . . . . . . . . 16

15.2 Test conditions . . . . . . . . . . . . . . . . . . . . . . . . 16

16 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 17

17 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

17.1 Introduction to soldering through-hole

mount packages . . . . . . . . . . . . . . . . . . . . . . 18

17.2 Soldering by dipping or by solder wave . . . . . 18

17.3 Manual soldering . . . . . . . . . . . . . . . . . . . . . . 18

17.4 Package related soldering information . . . . . . 18

18 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 19

19 Data sheet status . . . . . . . . . . . . . . . . . . . . . . . 21

20 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

21 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

calculation . 16

TDA8942P

2 x 1.5 W stereo BTL audio amplifier

© Philips Electronics N.V. 2000. Printed in The Netherlands

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.

Date of release: 14 March 2000 Document order number: 9397 750 06862