LB11872H

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 30 1.2 0.8 2.0 -20 to +80 -55 to +150 Unit V A W W °C °C Stresses exceeding Maximum Ratings may damage the device. Max...