LB1876 查看數據表（PDF） - SANYO -> Panasonic

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LB1876

Monolithic Digital IC For Polygon Mirror Motors 3-phase Brushless Motor Driver

SANYO -> Panasonic 

LB1876

Continued from preceding page.

Pin No. Pin name

Function

31 VREG

Stabilized power supply output (5V output) pin.

Insert a capacitor between this pin and ground for

stabilization. (About 0.1µF.)

Equivalent curcuit

VCC

31

32 LDSEL

33 BRSEL

−

FRAME

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.

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.

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.

VREG

VREG

30kΩ

2kΩ

32

30kΩ

2kΩ

33

No.6201-9/12

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