-11-
1
OSC
–
Oscillation terminal for activate.
2
COM
O
Comparator voltage for detection output waveform.
3
VS
I
Detect speed and voltage comparison for current feedback circuit. (Connected to motor com
terminal)
4
GND
–
Connected to ground.
5
S/S
I
Start/Stop terminal.
6
VREF
–
Reference voltage (0.9V).
7
IN+
I
Non reverse for differential AMP.
8
VSP
O
Output for output waveform's wave height detection.
9
OUT
O
Differential AMP output.
10
RI
–
Current feedback resistor connection terminal.
11
FC
–
Frequency response adjustment terminal.
12
LB
–
Prevent motor locking when activating motor (connected to ground through a capacitor).
13
HS
–
Hi speed (1.5 times speed as normal). (connected to ground)
14
DR
I
Forward/reverse rotate direction.
15
BRAKE
I
Brake terminal. (Brake : MC OFF and U, V, W OUT ON)
16
VCC
–
Power supply.
17
MC
O
Drive terminal for external PNP transistor.
18
U OUT
O
Phase U output.
19
V OUT
O
Phase V output.
20
W OUT
O
Phase W output.
21
P-GND
–
Ground for output transistor and pre-driver.
22
WB
–
3 differential AMP phase W base terminal.
23
VB
–
3 differential AMP phase V base terminal.
24
UB
–
3 differential AMP phase U base terminal.
IC, LB1977M-TLM
Pin No.
Pin Name
I/O
Description
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
