TDA2003
Níže je uveden pouze náhled materiálu. Kliknutím na tlačítko 'Stáhnout soubor' stáhnete kompletní formátovaný materiál ve formátu PDF.
Figure 20. Output power and
dr a in
cu r re n t
vs .
c ase
temperature (RL = 4
Ω)
Figure 21. Output power and
d r ai n
cu r re n t
vs .
c as e
temperature (RL = 2
Ω)
Figure 18.
Figure 19.
7/10
TDA2003
Component
Recommmended
value
Purpose
Larger than
recommended value
Smaller than
recommended value C1
C1
2.2
µF
Input DC
decoupling
Noise at switch-on,
switch-off
C2
470
µF
Ripple rejection
Degradation of SVR
C3
0.1
µF
Supply bypassing
Danger of oscillation
C4
1000
µF
Output coupling to load
Higher low frequency
cutoff
C5
0.1
µF
Frequency stability
Danger of oscillation at
high frequencies with
inductive loads
CX
≅
1
2
π B R1
Upper frequency cutoff
Lower bandwidth
Larger bandwidth
R1
(Gv-1)
• R2
Setting of gain
Increase of drain current
R2
2.2
Ω
Setting of gain
and SVR
Degradation of SVR
R3
1
Ω
Frequency stability
Danger of oscillation at
high frequencies with
inductive loads
RX
≅ 20 R2
Upper frequency cutoff
Poor high frequency
attenuation
Danger of oscillation
PRATICAL CONSIDERATION
Printed circuit boardThe layout shown in fig. 17 is recommended. If
different layouts are used, the ground points of
input 1 and input 2 must be well decoupled from
the ground of the output through which a ratherhigh
current flows.
Assembly suggestionNo electrical insulation is required between the
package and the heat-sink.Pin length should be as
short as possible. The soldering temperature must
not exceed 260
°C for 12 seconds.
Application suggestionsThe recommended component values are those
shown in the application circuits of fig.16.
Different values can be used. The following table is
intended to aid the car-radio designer.
8/10
TDA2003
Pentawatt V
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
4.8
0.189
C
1.37
0.054
D
2.4
2.8
0.094
0.110
D1
1.2
1.35
0.047
0.053
E
0.35
0.55
0.014
0.022
E1
0.76
1.19
0.030
0.047
F
0.8
1.05
0.031
0.041
F1
1
1.4
0.039
0.055
G
3.2
3.4
3.6
0.126
0.134
0.142
G1
6.6
6.8
7
0.260
0.268
0.276
H2
10.4
0.409
H3
10.05
10.4
0.396
0.409
L
17.55
17.85
18.15
0.691
0.703
0.715
L1
15.55
15.75
15.95
0.612
0.620
0.628
L2
21.2
21.4
21.6
0.831
0.843
0.850
L3
22.3
22.5
22.7