LB1813M
Truth Table
Source→ Sink
Hall-Effect Input
U
V
W
1
V-phase → W-phase
H
H
L
2
V-phase → U-phase
L
H
L
3
W-phase → U-phase
L
H
H
4
W-phase → V-phase
L
L
H
5
U-phase → V-phase
H
L
H
6
U-phase → W-phase
H
L
L
When an high level exists for Hall-effect input.
U+>U–
V+>V–
W+>W–
Pin Description
Pin No. Symbol
Pin voltage
Unit (resistance : Ω)
Equivalent circuit
5
W–
6
W+
7
V–
8
V+
9
U–
10
U+
2.2V min
VCC–0.7V max
11
HB
1.5V typ
IH=5mA
Pin function
• W-phase Hall-effect input pin.
W+>W– is established when logic is at an high level.
• V-phase Hall-effect input pin.
V+>V– is established when logic is at an high level.
• U-phase Hall-effect input pin.
U+>U– is established when logic is at an high level.
• Minus pin for Hall-efffect bias,
When stopped, switches open and Hall-effect bias
severs.
12
FC
13
I+
14
I–
1.5V typ
VCC–0.5V max
15
SL1
High : 2.0V min
Low : 0.8V max
16
SL2
High : 2.0V min
Low : 0.8V max
• Frequency characteristics revision pin. By installing a
capacitor between this pin and GND, close-loop
oscillation for the current control system halts.
• Index input pin.
When the I+ pin is at an low level, I1 operates with the
fixed current of I1=10µA and when at an high level, I1
does not flow.
Hysteresis width is determined by the resistor attached
externally to the I+ pin.
• Time changeover pin.
fosc=1MHz
SL2
SL1
H
L
H
L
600rpm
720rpm
300rpm
360rpm
FG : 60pulse/round
Continued to next page.
No.4183-4/8