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November 1982 5 Preliminary Specification
Philips Semiconductors Product specification
12 W car radio power amplifier TDA1020
HEATSINK DESIGN EXAMPLE
The derating of 8 K/W of the encapsulation requires the following external heatsink (for sine-wave drive):
10 W in 2 Ω at V
P
= 14,4 V
maximum sine-wave dissipation: 5,2 W
T
amb
= 60 °C maximum
Since R
th j-tab
+ R
th tab-h
= 8 K/W, R
th h-a
= 17,3 − 8 ≈ 9 K/W.
D.C. CHARACTERISTICS
A.C. CHARACTERISTICS
T
amb
= 25 °C; V
P
= 14,4 V; R
L
= 4 Ω; f = 1 kHz; unless otherwise specified; see also Fig.3
Supply voltage range (pin 3) V
P
6 to 18 V
Repetitive peak output current I
ORM
<4A
Total quiescent current
at V
P
= 14,4 V I
tot
typ. 30 mA
at V
P
= 18 V I
tot
typ. 40 mA
Output power at d
tot
= 10%; with bootstrap (note 1)
V
P
= 14,4 V; R
L
= 2 Ω P
o
>10W
typ. 12 W
V
P
= 14,4 V; R
L
= 4 Ω P
o
>6W
typ. 7 W
V
P
= 14,4 V; R
L
= 8 Ω P
o
typ. 3,5 W
Output power at d
tot
= 1%; with bootstrap (note 1)
V
P
= 14,4 V; R
L
= 2 Ω P
o
typ. 9,5 W
V
P
= 14,4 V; R
L
= 4 Ω P
o
typ. 6 W
V
P
= 14,4 V; R
L
= 8 Ω P
o
typ. 3 W
Output voltage (r.m.s. value)
R
L
= 1 kΩ; d
tot
= 0,5% V
o(rms)
typ. 5 V
Output power at d
tot
= 10%; without bootstrap P
o
> 4,5 W
Voltage gain
preamplifier (note 2) G
v1
typ. 17,7 dB
16,7 to 18,7 dB
power amplifier G
v2
typ. 29,5 dB
28,5 to 30,5 dB
total amplifier G
v tot
typ. 47 dB
46,2 to 48,2 dB
R
th j-a
R
th j-tab
R
th tab-h
R
th h-a
150 60–
52,
----------------------
17,3 K/W==++=