No. 7257 -9/13

LB11872H

Continued from preceding page.

Pin No.

Pin

Function

Equivalent circuit

Control amplifier frequency correction.

Inserting a capacitor (about 5600 pF) between this pin

and ground will stop closed loop oscillation in the current

control system. The output current response

characteristics will be degraded if the capacitor is too

large.

21

FC

21

VREG

Stabilized power supply (6.3 V)

Insert a capacitor (about 0.1 µF) between this pin and

ground for stabilization.

22

VREG

22

Vcc

Power supply

23

26

27

28

300

Ω

VREG

Vcc

25

SUB pin.

Connect this pin to ground.

24

SUB

Motor drive outputs.

If the output oscillates, insert a capacitor (about 0.1 µF)

between this pin and ground.

25

RF

Output current detection.

Insert low-valued resistors (Rf) between these pins and

ground. The output current will be limited to the value

26

27

28

OUT1

OUT2

OUT3

No connection (NC) pins.

These pins may be used for wiring connections.

1

10

11

13

NC

Ground

FRAME

GND