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Pin
Symbol
No.
Description
14
PCOUT
VCO circuit PLL output
LB11683H
Pin Voltage
12
GND
Ground for all other than the output transistor
13
7
BFGO
Motor counter-electromotive voltage detection
FG output (single-phase only).
Open collector output
Equivalent Circuit
VREG
VCC
14
100μA
VREG
7
6
FC
Frequency characteristics compensation pin.
Insertion of a capacitor between this pin and
ground stops oscillation of the closed loop of
current control system.
9
RD
Lock detection output.
When motor is running: low-level
When motor is locked: high-level
Open collector output
8
CT
Lock protection ON/OFF time setting capacitor
connection pin.
The capacitor connected between this pin and
ground determines the driver ON/OFF time
when the motor is locked.
VREG
VCC
6
15kΩ
VREG
9
0.1μA 1μA
VCC
15μA
8
25kΩ
VREG
2S
No. A0954-6/7