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6.4.2.2
250 Watt Amplifier Module
High energy efficiency class D amplifier design.
Low voltage protection.
Over current protection
Standby function to reduce power consumption.
C 3 0
L 1
D 1 0
D 1 2
Q
1
Q
2
Q
5
Q
2 1
C 7
R 1 1
D 6
D 1 4
D 8
D 1 6
Q
6
Q
Q
1 1
Q
Z 2
C 3
C 6
R 4 5
R 4 9
D 3
D 2
R 4
R 5
R 1 5
R 1 2
U 2
FU SE
C 2 0
C 3 6
(1 5 A )
Q
1 8
C 3 4
Z 3
R 6 0
Q
1 9
U 6
C O
N 1
Q
1 7
R 5 9
R 5 7
R 5 5
R 5 8
C 1 0
R 5 4
R 5 6
C 1 1
C 3 5
C 2 5
B RO O KS A US T RA L I A
PCB21 9 R2
SUB86 7
P O W E R I N ( 2 4 Vd c )
C A LIB ER A TIO N
( FACTO RY USE O NLY)
PO WER IN PU T
Table 7 OWS 250W amplifier specifications
Function
Voltage input range
Fuse rating
Low voltage shutdown
Audio input impedance
Output load
Amplifier Quiescent Current
Total OWS quiescent current
Total OWS active current – full load
TO SPEA K ER /
1 0 0 V A U D IO TR A N SFO R M ER
C 3 1
L 2
D 1 3
D 1 1
Q
4
Q
3
Q
2 5
Q
2 2
Q
1 0
C 1
R 1 7
R 1 8
R 1 4
Z 1
D 9
D 1 7
D 7
D 1 5
R 3 2
8
Q
9
Q
7
Q
1 6
R 3 1
R 1 9
D 1 8
D 1 9
Q
1 5
C 1 4
R 2 2
1 2
Q
1 4
Q
1 3
R 3 4
R 2 1
R 2 5
R 2 0
R 2 6
C 9
C 2 9
C 2 1
R 3 3
R 5 3
R 4 8
R 2 8
U 5
Q
2 6
D 5
D 4
C 3 7
R 5 1
R 7
R 6
R 1 0
R 1 3
Q
2 0
R 2 7
R 2 4
R 8
R 2 9
U 3
Q
2 4 Q
2 3
C 2 6
R 2 3
C 1 2
R 3
C 2
U 4
U 1
C 3 3
C 8
C 1 5
R 4 0
R 1
C 4
D 1
R 4 1
R 3 8
R 3 7
R 4 2
R 1 6
C 5
R 4 3
R 9
C 1 3
C O
N 2
V R 2
V R 1
R 2
C 2 2
C 2 4
C 2 3
VO LUM E
CAL .
S T D B Y
A UDI O
I N
STA N D B Y
A U D IO IN PU T
VO LU M E A D J U C TM EN T
Figure 20 Class-D 250W Audio Amplifier Board Layout
42
42
Technical/Programming Manual
Rating
20 – 32 V
DC
15 A (automotive blade fuse)
19 V (approx.)
10 kΩ
1 Ω
40 mA
119 mA
42
10 A
44
FT1020G3 Rev 2.2.1
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