LB11873: Three-Phase Brushless Motor Driver for Polygonal Mirror Motors

The LB11873 is a 3-phase brushless motor driver developed for driving the polygonal mirror motor used in plain-paper copiers and similar products. This IC can implement the circuits required for polygonal mirror motor drive (speed control and driver circuits) in a single chip. The LB11873 implements low-noise/low-vibration PWM drive by changing the current at phase switching gradually to reduce motor noise.

Features
  • Three-phase bipolar drive (quiet direct PWM)
  • PLL speed control circuit
  • Hall sensor FG support
  • Dedicated external clock
  • Brake mode switching circuit (free running and reverse braking)
  • Phase lock detection output (with masking function)
  • Built-in current limiter, constraint protection, undervoltage protection, thermal protection, and CLK line disconnection protection circuits
  • Input pins support 3V system microcontrollers
End Products
  • LBP/PPC
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Three-Phase Brushless Motor Driver IC for Polygonal Mirror MotorsENA0081/D (154.0kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
HSOP36 (375mil)943AC (61.3kB)A
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
LB11873-MPB-ELast ShipmentsPb-freeHSOP-36943AC3Fan-Fold20
LB11873-TRM-EActivePb-freeHSOP-36943AC3Tape and Reel1000$1.4666
Specifications
ProductPhaseVM Min (V)VM Max (V)VCC Min (V)VCC Max (V)IO Max (A)IO Peak Max (A)Control TypeCurrent SenseRegulator OutputFault Detection
LB11873-TRM-E39.5289.5281.8ClockExternal ResistorYesOver-Current
Three-Phase Brushless Motor Driver IC for Polygonal Mirror Motors (154.0kB) LB11873
HSOP36 (375mil) LB1876