Samsung SC-148B Service Manual page 16

PIN ASSIGNMENT
TERMINAL TERMINAL
NO. SYMBOL
1 L b (G)
2 L a (G)
3 L a
4 V M2
5 SB
6 R F1
7 GND2
8 C RF
9 N.C
10 FGO
11 BRK
12 H b -
13 H b +
14 H a -
15 H a +
16 H c +
17 H c -
18 HB
19 Cd
20 V CC
21 V C
22 V ref
23 OSC
24 GND1
25 R F2
26 MS
27 L C (G)
28 L C
29 V M1
30 L b
FUNCTION
b-phase upper side power transistor
(base)output terminal
a-phase upper side power transistor
(base)output terminal
a-phase output terminal
Supply voltage terminal for motor drive Connect to V
RUN/STOP control terminal
Output current detection terminal
GND
Output current filter terminal
FG amplifier output terminal
Brake mode select terminal
b-phase negative hall signal input
terminal
b-phase positive hall signal input
terminal
a-phase negative hall signal input
terminal
a-phase positive hall signal input
terminal
c-phase positive hall signal input
terminal
a-phase negative hall signal input
terminal
Hall element bias terminal
Forward/reverse changeover gain
adjustment terminal
Supply voltage terminal for control
circuits
Control amplifier inputer terminal
Control amplifier reference voltage
input terminal
Triangular wave oscillation terminal
GND
Output current detection terminal
Mode select terminal
c-phase upper side power transistor
(base) output terminal
c-phase output terminal
Supply voltage terminal for motor drive Connect to V M2 externally.
b-phase output terminal
40
REMARKS
Keep open.
Keep open.
Connect to the coil.
externally.
M1
H-:RUN, L:STOP
Sets limiter current value.
Connect to R externally and
F2
between this terminal and GND.
-
Connect a capacitor between this
terminal and GND.
Outputs a signal whose
frequency is determined by the
CD rotation frequency.
Output mode when V C >V ref
Connect to hall element output
terminal.
Connect to hall element output
terminal.
Connect to hall element output
terminal.
Connect to hall element output
terminal.
Connect to hall element output
terminal.
Connect to hall element output
terminal.
Open collector output, Connect to
the negative side of hall element
bias line.
Adjust a rotation direction
changeover gain
V CC(opr) =4.4~5.5V
Use the control signal as input.
Use the reference voltage for
the control amplifier as input.
Connect a capacitor between
the control amplifier as input.
-
Sets limiter current value.
Connect to R F1 externally and
between this terminal and GND.
Determines output mode.
Keep open.
Connect to the coil.
Connect to the coil.