LB11923V Datasheet, PDF (12/20 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver

Continued from preceding page.
Pin No.
Pin
LB11923V
Functions
VCO oscillator connection
This pin sets the VCO frequency.
21
C
Insert a capacitor between this pin and ground.
Set the value of the capacitor so that the oscillator
frequency does not exceed 1 MHz.
VCC1
Equivalent circuit
300 Ω
21
Sets the operating time of the constrained-rotor protection
circuit.
Reference signal oscillator used when the clock signal is cut
22
CSD
off and to prevent malfunctions.
The protection function operating time can be set by
connecting a capacitor between this pin and ground.
This pin also functions as the logic circuit block power-on
reset pin.
VCC1 ^{Reset circuit}
300 Ω
22
23
24
FGIN⁺
FGIN^–
FG amplifier input
VCC1
500 Ω
23
500 Ω
FGOUT
500 Ω
24
VCC1
FG amplifier output
25
FGOUT This pin is connected to the FG Schmitt comparator circuit
25
internally in the IC.
27
RF GND
Output current detection
Connect a resistor between this pin and ground.
FG Schmitt comparator
VCC1
27
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No. 7498-12/20