LB1981 Sanyo, LB1981 Datasheet - Page 6

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

Continued from preceding page
Pin number
18
19
20
22
21
Pin name
FILTER
PG
OSC
FC1
FC2
OUT
Pin voltage
1k
5 A
V CC 1
V CC 1
5k
V CC 1
29
2s
1k
2k
2k
2.5 A
30 A
10k
1
LB1981V
1k
Equivalent circuit
1k
10k
2
30k
19
30k
21
1k
10 A
25 A
V CC 1
18
FC2
22
20
A10869
A10870
A10868
A10867
V CC 1
A10871
FG amplifier output pin.
Pin for connecting triangular
wave oscillator capacitor.
Serves for forced startup
waveform generation.
Frequency characteristics pin.
Connecting a capacitor
between this pin and ground
serves to prevent closed-loop
oscillation in the current
control circuitry.
(Lower-side output transistor
drive current)
Frequency characteristics pin.
Connecting a capacitor
between this pin and ground
serves to prevent closed-loop
oscillation in the current
control circuitry.
(Lower-side output transistor
drive current)
Connecting a capacitor
between this pin and ground
activates the coil output
saturation prevention function.
In this condition, the VS pin is
controlled for motor voltage
control.
By adjusting the external
capacitor, torque ripple
compensation can be varied.
Continued on next page
Pin function
No. 5917-6/9