LB11872H Datasheet, PDF (1/11 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for Polygonal Mirror Motors

Ordering number : EN7257B
LB11872H
Monolithic Digital IC
For Polygonal Mirror Motors
Three-Phase Brushless Motor Driver
http://onsemi.com
Overview
The LB11872H is a three-phase brushless motor driver developed for driving the motors used for the polygonal mirror
in laser printers and similar applications. It can implement, with a single IC chip, all the circuits required for polygonal
mirror drive, including speed control and driver functions. The LB11872H can implement motor drive within minimal
drive noise due to its use of current linear drive.
Features
• Three-phase bipolar current linear drive + midpoint control circuit.
• PLL speed control circuit.
• Speed is controlled by an external clock signal.
• Supports Hall FG operation.
• Built-in output saturation prevention circuit.
• Phase lock detection output (with masking function).
• Includes current limiter, thermal protection, rotor constraint protection, and low-voltage protection circuits on chip.
• On-chip output diodes.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Supply voltage
Output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
IO max
Pd max1
Pd max2
Topr
Tstg
Conditions
T ≤ 500ms
Independent IC
*With specified substrate
∗ When mounted on the specified printed circuit board : 114.3mm × 76.1mm × 1.6mm, glass epoxy
Ratings
Unit
30
V
1.2
A
0.8
W
2.0
W
-20 to +80
°C
-55 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
82708 MS PC/91002AS (OT) No.7257-1/11