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IC, LB1977M-TLM
Pin No.
Pin Name
1
OSC
2
COM
3
VS
4
GND
5
S/S
6
VREF
7
IN+
8
VSP
9
OUT
10
RI
11
FC
12
LB
13
HS
14
DR
15
BRAKE
16
VCC
17
MC
18
U OUT
19
V OUT
20
W OUT
21
P-GND
22
WB
23
VB
24
UB
I/O
–
Oscillation terminal for activate.
O
Comparator voltage for detection output waveform.
Detect speed and voltage comparison for current feedback circuit. (Connected to motor com
I
terminal)
–
Connected to ground.
I
Start/Stop terminal.
–
Reference voltage (0.9V).
I
Non reverse for differential AMP.
O
Output for output waveform's wave height detection.
O
Differential AMP output.
–
Current feedback resistor connection terminal.
–
Frequency response adjustment terminal.
–
Prevent motor locking when activating motor (connected to ground through a capacitor).
–
Hi speed (1.5 times speed as normal). (connected to ground)
I
Forward/reverse rotate direction.
I
Brake terminal. (Brake : MC OFF and U, V, W OUT ON)
–
Power supply.
O
Drive terminal for external PNP transistor.
O
Phase U output.
O
Phase V output.
O
Phase W output.
–
Ground for output transistor and pre-driver .
–
3 differential AMP phase W base terminal.
–
3 differential AMP phase V base terminal.
–
3 differential AMP phase U base terminal.
Description
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