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TDA8551 Datasheet(PDF) 9 Page - NXP Semiconductors

Part No. TDA8551
Description  1 W BTL audio amplifier with digital volume control
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8551 Datasheet(HTML) 9 Page - NXP Semiconductors

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1998 Feb 23
9
Philips Semiconductors
Product specification
1 W BTL audio amplifier with digital volume control
TDA8551
When a practical PCB layout is used with wider copper
tracks and some extra copper added both to the IC pin
connections and underneath the IC, the thermal resistance
from junction to ambient can be reduced. Without these
measures Rth j-a = 160 K/W for the SO8 package; see
Chapter “Thermal characteristics”. The power dissipation
can be calculated as follows:
For a maximum ambient temperature of 50
°C, VP =5V
and RL =8 Ω this results in a worst case sine wave
dissipation of 0.63 W.
Figures 5 to 15 represent test results obtained while using
the test circuit given in Fig.4. The following test conditions
apply: Tamb =25 °C; VP = 5 V; f = 1 kHz; RL =8 Ω;
Gv = 20 dB; audio bandwidth from 22 Hz to 22 kHz
(except for Figs 8 and 9); unless otherwise specified.
P
T
amb
R
th j-a
--------------
=
Fig.5
Supply current as a function of supply
voltage.
handbook, halfpage
024
6
10
0
8
6
4
2
MGM554
VP (V)
IP
(mA)
Fig.6
Total harmonic distortion as a function of
output power at different frequencies.
(1) f = 10 kHz.
(2) f = 1 kHz.
(3) f = 100 Hz.
handbook, halfpage
10
10−1
1
10−2
MGM551
10−2
10−1
110
Po (W)
THD
(%)
(3)
(2)
(1)
Fig.7
Total harmonic distortion as a function of
output power at different gains.
f = 1 kHz.
(1) Gv = 0 dB.
(2) Gv = 7 dB.
(3) Gv =20dB.
handbook, halfpage
10
10−1
1
10−2
MGM552
10−2
10−1
110
Po (W)
THD
(%)
(1)
(2)
(3)


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