LB1876

No.6201-9/12

Continued from preceding page.

Pin No.

Pin name

Function

Equivalent curcuit

31

VREG

Stabilized power supply output (5V output) pin.

Insert a capacitor between this pin and ground for

stabilization. (About 0.1

μF.)

31

VCC

32

LDSEL

Phase lock signal mask switching pin.

Low: 0 to 1.5V

High: 3.5V to VREG

When open, this pin goes to the high level.

When low, transient unlock signals (short high-level periods

on the LD output) are masked, and when high, transient lock

signals (short low-level periods on the LD output) are

masked.

32

VREG

30k

Ω

2k

Ω

33

BRSEL

Braking control pin.

Low: 0 to 1.5V

High: 3.5V to VREG

When open, this pin goes to the high level.

When low, reverse torque control is applied and when high,

the circuit operates in free-running mode. An external

Schottky barrier diode is required on the low side output

when reverse torque control is applied.

33

VREG

30k

Ω

2k

Ω

−

FRAME

The FRAME pin is connected internally to the metal frame at

the base of the IC. Electrically, both the FRAME pin and the

metal frame are left open. To improve thermal dissipation,

provide a corresponding land on the PCB and solder the

FRAME pin to that land.