Brooks Firetracker FT128 CIE - 250 Watt Amplifier Module; Figure 19 Class-D 250 W Audio Amplifier Board Layout; Table 7 OWS 60;120 W Amplifier Specifications

Technical / Programming Manual
FT128 Rev 2.2
43
Table 7 OWS 60/120W amplifier specifications
Function
60W version
120W version
Voltage input range
20 to 32Vdc
Fuse rating
5 A (blade fuse)
7.5 A (blade fuse)
Low voltage shutdown
15 V (approx)
Audio input impedance
10 kΩ
Output load
4 Ω
2 Ω
Amplifier quiescent Current
38
40 mA
Total OWS quiescent Current
38
118 mA
119 mA
Total OWS active current – full load
38
2.8 A
5.17 A
5.4.2.2 250 Watt Amplifier Module
 High energy efficiency class D amplifier design.
 Low voltage protection.
 Over current protection
 Standby function to reduce power consumption.
AUDIO OUT
O VER- CURRENT
AUDI O I N
CAL.
S T D B Y
VO LUM E
PO W ER I N ( 2 4 Vd c )
C 1 5
Z3
Z2
U5
R 2 9
R 2 8
R 2 7
R 2 6R 2 5
R 2 4
R 2 3
R 2 2
R 2 1 R 2 0
R 1 9
Q 2 6
Q 2 5
Q 2 4 Q 2 3
L E D 1
D 1 9D 1 8
C 2 6
C 1 6
C 1 4
D 1 2
R 1 6
C 1 3
R 1 0
R8
R3
Q 2 0
Z1
V R 2 V R 1
U6
U4
U3U2
U1
R 6 0
R 5 9
R 5 8R 5 7
R 5 6
R 5 5
R 5 4
R 5 3
R 5 1
R 4 9 R 4 8R 4 5
R 4 3
R 4 2R 4 1
R 4 0
R 3 8 R 3 7
R 3 4
R 3 3
R 3 2
R 3 1
R 1 5
R 1 3
R9
R7 R6R5R4
R2
R1
Q 1 9
Q 1 8
Q 1 7
Q 1 6
Q 1 5
Q 1 4 Q 1 3Q 1 2Q 1 1
Q9Q8 Q7Q6
Q4 Q3Q2Q1
L2
L1
F1
D5 D4D3 D2
D1
C O N 3
C O N 2
C O N 1
C 3 4
C 3 3
C 3 1
C 3 0
C 2 9
C 2 5
C 2 4 C 2 3
C 2 2
C 2 1
C 2 0 C 1 2
C 1 1
C 1 0
C9
C8
C6
C5
C4
C3
C2
C1
C 3 5
C 3 6
C 3 7
R 1 2
D6 D7D8 D9
D 1 0 D 1 1D 1 3
D 1 4
BRO O KSA UST RAL I A
C7
D 1 5D 1 6 D 1 7
Q5 Q 1 0Q 2 1 Q 2 2
R 1 1 R 1 4R 1 7 R 1 8
SUB867PCB219R2
TO SPEA K ER /
100V A U D IO TR A N SFO R M ER
VO LU M E A D JU C TM EN T
A U D IO IN PU T
PO WER IN PU T
STA N D B Y
C A LIB ER A TIO N
( FACTO RY USE O NLY)
FU SE
(15A )
Figure 19 Class-D 250W Audio Amplifier Board Layout
38
Current measured at 27V supply