LB11685VH Datasheet, PDF (5/7 Pages) Sanyo Semicon Device – Monolithic Digital IC 3-phase sensor less Motor driver

Pin Function
Pin No.
16
12
14
20
Pin name
UOUT
WOUT
VOUT
PGND
9
RF
21
MCOM
LB11685VH
Function
Each output pin of three phases.
GND pin in the output part.
This pin is connected to GND. The SGND pin is also
connected to GND
Pin to detect output current.
By connecting a resistor between this pin and VCC, the
output current is detected as a voltage.
The current limiter is operated by this voltage.
Motor coil midpoint input pin.
The coil voltage waveform is detected based on this
voltage.
22
SGND
23
FG
25
RD
27
VCO
Ground pin (except the output part)
This pin is connected to GND.
The PGND pin is also connected to GND.
FG out made by back EMF pin.
It synchronizes FG out with inverted V-phase.
When don’t use this function, open this pin.
Motor lock protection detection output pin.
Output with L during rotation of motor.
Open during lock protection of motor (High-impedance).
When don’t use this function, open this pin.
PLL output pin and VCO input pin.
To stabilize PLL output, connect a capacitor between this
pin and GND.
Equivalent circuit
Pin No.9
Pin No.16,14,12
Pin No.20
SGND SGND SGND
VCC
VCC
Pin No.21
SGND
SGND
Pin No.23
No.25
SGND
SGND
VREG
VCC
Pin No.27
SGND
VREG
VREG
1
CX
VCO oscillation output pin.
Operation frequency range and minimum frequency are
determined by the capacity of the capacitor connected to
this pin.
SGND
VREG
VCC
Pin No.1
SGND
SGND
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