lb1854m Sanyo Semiconductor Corporation, lb1854m Datasheet - Page 4

• Manufacturer Part Number: lb1854m
• Description: Three-phase Brushless Motor Driver Ic
• Manufacturer: Sanyo Semiconductor Corporation

Truth Table
Input high: Phase 1 is 0.2 V or more higher than the corresponding phase 2 for each phase input.
Low: Phase 1 is 0.2 V or more lower than the corresponding phase 2 for each phase input.
Forward and reverse control high: 2.3 V to V
Low: 0 V to 0.7 V
Pin Functions
1, 2, 14,
Pin No.
15, 16,
17, 29,
1
2
3
4
5
6
30
3
4
5
6
Source
W phase
V phase
W phase
U phase
V phase
W phase
U phase
W phase
U phase
V phase
V phase
U phase
V
FRAME
Symbol
CC
V
(GND)
C REF
FC
V
1
C
W phase
W phase
W phase
W phase
U phase
U phase
V phase
V phase
V phase
U phase
V phase
U phase
1.5 V min
V
0 V min
V
5 to 18 V
CC
CC
Pin voltage
Sink
2 max
2 max
U
H
H
H
L
L
L
CC
1
Input
H
H
V
H
L
L
L
W
H
H
H
L
L
L
Equivalent circuit
Forward and reverse control
LB1854M
F/RC
H
H
H
H
H
H
L
L
L
L
L
L
Ground for all circuits except the outputs
The gain frequency characteristics can be lowered by
connecting a capacitor between this pin and ground to
prevent oscillation.
Speed control
The LB1854M implements a voltage control scheme in
which the output voltage is controlled by the pin 5 voltage.
The pin 4 voltage determines the control start voltage.
Power supply that provides the drive outputs
Function
Unit (resistance: Ω)
No. 4476-4/6