– 14 –
• IC Block Diagrams
IC301 LA4585M-TLM
IC302 NJM2185AV-TE2
IC601 MM1370XVBE
28
18
29
17
16
15
14
13
12
10
8
9
11
30
31
32
33
34
35
36
25 24 23 22
26
27
21 20
R.F
REF
REF
REF
REF
19
REF
REF
LOW
BOOST
SYS.
CONT
DET
DET
MIX.2
MIX.1
6
7
4
5
3
2
1
PWR.C
PWR.1
PWR.2
MIX IN (R)
HP IN (R)
LP1
L.B.GAIN
M.B.ON/OFF
LP2
DET1
FWD/REV
PWR IN (R)
MIX OUT (R)
MIX OUT (L)
RIPPLE
REF
FWD (L)
FWD (R)
REV (R)
REV (L)
NF (L)
NF (R)
MIX IN (L)
HP IN (L)
SW OUT (L)
SW OUT (R)
PRE OUT (L)
PRE OUT (R)
PRE GND
PRE MUTE
POWER MUTE
PWR OUT (R)
VCC
COM
PWR GND
PWR OUT (L)
AVLS
DET2
PWR IN (L)
PRE2
PRE1
14
13 12
11
10 9
8
4
3
2
1
5
6
7
WEIGHT
G2
G1
V/I
BIAS
CIRCUIT
Bch BLOCK (same Ach)
VCC
ON/OFF
VEXT
INR
OUTR
DCR
DETR
GND
IREF
VREF
INL
O
UTL
DCL
DETL
SUM
Gm
Ach BLOCK
20
19
18 17 16 15
14 13
12
7
8
10
9
6
5
4
1
2
3
11
OUTPUT
BIAS
CIRCUIT
CURRENT
CONTROL
VELOCITY
CONTROL
START-UP •
OSCILLATION
CIRCUIT
START-UP
CONTROL
CIRCUIT
ERROR AMP
PHASE SELECT
CIRCUIT
PRE DRIVER
START-UP
LOGIC
FORWARD/REVERSE
SELECT SWITCH
GND-2
FC
RI
OUT
VSP
IN+
VREF
STAR
T
COM
OSC
PU
VCC
DR
U
V
W
P-GND
PV
PW
GND-1
