LB11870: Motor Driver, 3-Phase, Brushless

The LB11870 is a three-phase brushless motor driver developed for driving the motors used with the polygonal mirror in laser printers and plain paper copiers. It can implement, with a single IC chip, all the circuits required for polygonal mirror drive, including speed control and driver functions. The LB11870 can implement motor drive with minimal power loss due to its use of direct PWM drive.

Features
  • Three-phase bipolar drive
  • Direct PWM drive
  • Includes six high and low side diodes on chip.
  • Output current control circuit
  • PLL speed control circuit
  • Phase lock detection output (with masking function)
  • Includes current limiter, thermal protection, rotor constraint protection, and low-voltage protection circuits on chip.
  • Deceleration type switching circuit (free running or reverse torque)
  • PWM oscillator
  • Power saving circuit
End Products
  • LBP/PPC
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Three-Phase Brushless Motor DriverEN7256/D (191.0kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
HSSOP48 (375mil)944AB (58.7kB)A
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
LB11870-MPB-ELast ShipmentsPb-freeHSSOP-48944AB3Fan-Fold20
LB11870-TRM-EActivePb-freeHSSOP-48944AB3Tape and Reel1000$1.7333
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
LB11870-TRM-E39.5289.5282.3PWMExternal ResistorYesOver-Current
Three-Phase Brushless Motor Driver (191.0kB) LB11870
HSSOP48 (375mil) LB11870