LB11873

Ordering number : ENA0081B www.datasheet4u.com Monolithic Digital IC LB11873 Overview For Polygonal Mirror Motors Three-Phase Brushless Motor Driver 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. Functions 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 Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage Output current Allowable power dissipation 1 Allowable power dissipation 2 Symbol VCC max IO max Pd max1 Pd max2 T ≤ 500ms Independent IC When mounted on a circuit board *1 Conditions Ratings 30 1.8 0.9 2.1 Unit V A W W *1 Specified circuit board : 114.3 × 76.1 × 1.6mm3, glass epoxy. Continued on next page. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard...