LB11872H Description
ENN7257A Monolithic Digital IC LB11872H Three-Phase Brushless Motor Driver for Polygonal Mirror Motors 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 Key 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