TDA8551_T NXP Semiconductors, TDA8551_T Datasheet - Page 9

• Manufacturer Part Number: TDA8551_T
• Description: The TDA8551; TDA8551T is a one channel 1 WBridge-Tied Load (BTL) audio power amplifier capable ofdelivering 1 W output power to an 8 Ω load at THD = 10%using a 5 V power supply
• Manufacturer: NXP Semiconductors

NXP Semiconductors
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 R
Chapter “Thermal characteristics”. The power dissipation
can be calculated as follows:
For a maximum ambient temperature of 50 °C, V
and R
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: T
G
(except for Figs 8 and 9); unless otherwise specified.
1998 Feb 23
P
handbook, halfpage
v
1 W BTL audio amplifier with digital volume
control
=
= 20 dB; audio bandwidth from 22 Hz to 22 kHz
(1) f = 10 kHz.
(2) f = 1 kHz.
(3) f = 100 Hz.
Fig.6
THD
(%)
------------- -
R
T
10
10
L
amb
th j-a
10
= 8 Ω this results in a worst case sine wave
−1
−2
amb
10
1
−2
Total harmonic distortion as a function of
output power at different frequencies.
= 25 °C; V
th j-a
= 160 K/W for the SO8 package; see
10
P
−1
= 5 V; f = 1 kHz; R
(1)
(2)
(3)
1
P o (W)
L
MGM551
= 8 Ω;
10
P
= 5 V
9
handbook, halfpage
handbook, halfpage
Fig.5
f = 1 kHz.
(1) G
(2) G
(3) G
Fig.7
THD
(mA)
(%)
10
10
I P
10
10
−1
−2
8
6
4
2
0
1
10
v
v
v
= 0 dB.
= 7 dB.
= 20 dB.
0
−2
Supply current as a function of supply
voltage.
Total harmonic distortion as a function of
output power at different gains.
10
2
−1
(1)
(2)
(3)
1
4
Product specification
P o (W)
V P (V)
TDA8551
MGM552
MGM554
10
6