lb1876 Sanyo Semiconductor Corporation, lb1876 Datasheet - Page 11

• Manufacturer Part Number: lb1876
• Description: Three-phase Brushless Motor Driver For Polygon Mirror Motors
• Manufacturer: Sanyo Semiconductor Corporation

Continued from preceding page.
Pin No.
32
33
FREME
Symbol
LDSEL
BRSEL
This pin must be left open.
Phase lock signal mask switching
Low: 0 to 1.5 V
High: 3.5 V 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
Low: 0 to 1.5 V
High: 3.5 V 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.
Description
LB1876
VREG
VREG
Equivalent circuit
30 k
30 k
2k
2k
No. 6201-11/14
32
33