LB11681H Datasheet, PDF (7/11 Pages) Sanyo Semicon Device – Monolithic Digital IC PWM Three-phase Brushless Motor Driver

LB11681H
Continued from preceding page.
Pin No.
Symbol
Pin Description
13
FG
FG pulse output pin (Open collector output)
Provides one Hall effect sensor equivalent FG
output)
When the FG output is necessary, connect a pull-
up resistance with this pin.
Equivalent Circuit
VR
13
14
VR
Simplified power supply output pin.
VM
Connect a capacitor between this pin and GND.
This pin is connected with power supply of the
small signal system circuit in IC.
14
15
F/R
Pin to switch the rotating mode in spindle motor
block.
VR
Do not apply a voltage above the voltage of the
VR pin.
Switch F / R when the motor has stopped.
15
40kΩ
17
LCK
Lock protection circuit timing setting pin.
Connect a capacitor between this pin and GND.
VR
As the capacity increase,
the time of lock detection / release setting can be
lengthened
1kΩ
17
1kΩ
19
LD
Lock detection output pin (Open collector output)
The LD output goes to the high level during lock
VR
protection
When LD output is necessary, connect a pull-up
resistance with this pin
19
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