LB1981 Sanyo, LB1981 Datasheet - Page 7

• Manufacturer Part Number: LB1981
• Description: Three-Phase Brushless Motor Driver
• Manufacturer: Sanyo

Continued from preceding page
Pin number
23
24
25
26
27
28
29
30
1
2
Pin name
BFG0
W
U
V
COM
GND
W
U
V
RF
OUT
OUT
OUT
IN
IN
IN
Pin voltage
V CC 2
50 A
25
26
27
3.9
3.9
2k
LB1981V
Equivalent circuit
50 A
200
30k
10 A
29 1
V CC 1
200
200
2
V CC 1
A10874
30
A10872
23
A10873
V S
28
Motor counterelectromotive
voltage FG pulse pin.
Outputs a pulse using W
phase counterelectromotive
voltage as FG.
Connect to ground if not used.
Ground for all circuits except
output.
Coil waveform detect
comparator input pins.
Motor coil midpoint input pin.
Using this voltage as a
reference, the coil voltage
waveform is detected.
W phase coil output pin.
U phase coil output pin.
V phase coil output pin.
Output transistor ground.
Constant current drive is
performed by detecting the
voltage at this pin.
Pin function
No. 5917-7/9