SX-LX70SW
47
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.7 CONDITIONS FOR SWITCHING THE ROTAIONS SPEED OF THE FAN
A fan is provided with this
u
nit. Its rotation speed can be switched between Low and High by taking the feedback voltage ( 0
V
to 5
V
) from DAMP o
u
tp
u
t as FA
N
I
N
FO described below.
1. Conditions for switching the rotation speed from High
⇔
Low
In a case either DAMP o
u
tp
u
t is over 0.125
W
(1.0
V
) /
8
Ω
, or all o
u
tp
u
t is
u
nder the val
u
e
• If the FA
N
I
N
FO port, which are monitored every 30 ms, matches 100 times, the rotation speed is determined as below.
FA
N
I
N
FO port (37Pin) = “ H ” and FA
N
CO
N
T (
8
1M) = “ H ”
⇒
Low speed
FA
N
I
N
FO port (37Pin) = “ L ” and FA
N
CO
N
T (
8
1M) = “ L ”
⇒
High speed
•
W
hen the state is other than PO
W
ER O
N
, the roation speed is fixed to Low.
2. Fan drive circuit and drive voltage
The fan drive circ
u
it and the drive voltages at low/high rotation speed are shown below:
+
V
SFA
N
2SD1664
FA
N
CO
N
T
UDZS
8
R2
DTC124EUA
V
SF+12
Note:
The above voltage val
u
es are references.
They differ from prod
u
ct to prod
u
ct.
Power
Voltage (V)
Low speed
V
SF+12
12.0
V
SFA
N
7.3
High speed
V
SF+12
12.0
V
SFA
N
10.7
E
B
C
FANCONT
H : Low speed
L : High speed
FAN DET
H : Low speed
L : High speed
OUTPUT SELECT SETTING
HIGH
⇔
LO
W
0.125
W
(1.0
V
) /
8
Ω
+
V
S+5
2SA1576A
SP+
FA
N
DET
SP-
2SC40
8
1
AMP ASSY OUTPUT DETECTIO
N
MAI
N
ASSY FA
N
V
OLTAGE S
W
ITCH
Содержание AS-LX70
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