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LB11872H Datenblatt(PDF) 1 Page - ON Semiconductor

Teilenummer LB11872H
Bauteilbeschribung  Three-Phase Brushless Motor Driver
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82708 MS PC/91002AS (OT) No.7257-1/11
http://onsemi.com
Semiconductor Components Industries, LLC, 2013
May, 2013
LB11872H
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
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC max
30
V
Output current
IO max
T
≤ 500ms
1.2
A
Pd max1
Independent IC
0.8
W
Allowable power dissipation
Pd max2
*With specified substrate
2.0
W
Operating temperature
Topr
-20 to +80
°C
Storage temperature
Tstg
-55 to +150
°C
∗ When mounted on the specified printed circuit board : 114.3mm × 76.1mm × 1.6mm, glass epoxy
Monolithic Digital IC
For Polygonal Mirror Motors
Three-Phase Brushless Motor Driver
Ordering number : EN7257B
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.


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