No. 7110-8/11

LB11827

Continued from preceding page.

Pin No.

Pin

Function

Equivalent circuit

Speed discriminator output.

Accelerate: high, decelerate: low

14

DOUT

14

300

Ω

16

15

Speed lock detection output.

L when the motor speed is within the speed lock range (±6.25%).

Voltage resistance 30 Vmax

15

LD

300

Ω

FG Reset

300

Ω

17

18

2 k

Ω

19

FG amplifier input pin.

Connection of a capacitor (about 0.1 µF) between FGIN and

GND causes initial reset to the logic circuit.

Start/stop control pin.

Low: 0 V to 1.5 V

High: 3.5 V to VREG

H level when open.

Hysteresis width about 0.5 V

17

18

19

S/S

FG amplifier output pin

16

FG

OUT

Continued on next page.

FG schmitt comparator