LB1821 Sanyo, LB1821 Datasheet - Page 13

• Manufacturer Part Number: LB1821
• Description: Power Brushless Motor Pre-Driver IC for OA Equipment
• Manufacturer: Sanyo

Continued from preceding page.
16 to 18
38 to 40
Pin No.
11
12
13
14
15
FGS
FG
FG
FG
GND
Pin
N2
OUT
IN
IN
OUT
–
+
Speed discriminator count switching
Low: 0 to 1.5 V
High: 4.0 V to V
An open state functions as a high-level input.
The hysteresis is about 0.45 V.
FG amplifier output (after the Schmitt circuit)
This is an open collector output.
FG amplifier output
This pin is connected to the FG Schmitt comparator circuit
internally in the IC.
FG amplifier inverting input
FG amplifier noninverting input (1/2 V
An initial reset is applied to the logic circuit block by
connecting an external capacitor (of about 0.1 µF) between
the FGIN+ pin and ground.
Ground connections
These pins are all connected internally to the frame.
CC
Functions
CC
potential)
LB1821M
FG reset circuit
FG Schmitt comparator
Equivalent circuit
Continued on next page.
No. 5686-13/16