LB1876_09 SANYO [Sanyo Semicon Device], LB1876_09 Datasheet - Page 9

• Manufacturer Part Number: LB1876_09
• Description: For Polygon Mirror Motors 3-phase Brushless Motor Driver
• Manufacturer: SANYO [Sanyo Semicon Device]

Continued from preceding page.
Pin No.
31
32
33
−
VREG
LDSEL
BRSEL
FRAME
Pin name
Stabilized power supply output (5V output) pin.
Insert a capacitor between this pin and ground for
stabilization. (About 0.1µF.)
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.
Function
LB1876
VREG
VREG
V CC
Equivalent curcuit
30kΩ
30kΩ
2kΩ
2kΩ
31
No.6201-9/12
32
33