描述 Description

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.

特性 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

簡(jiǎn)介

LB11870屬于集成電路（IC）的電機(jī)驅(qū)動(dòng)器控制器。由制造生產(chǎn)的LB11870電機(jī)驅(qū)動(dòng)器，控制器產(chǎn)品屬于電機(jī)驅(qū)動(dòng)器和控制器電源管理集成電路 (PMIC) 系列，可用于控制或操作從某電源施加到電機(jī)或相關(guān)機(jī)電執(zhí)行器的電源。所實(shí)現(xiàn)的具體功能和特性集根據(jù)預(yù)期負(fù)載和預(yù)期應(yīng)用的特性有很大差異，范圍從用于有刷電機(jī)的簡(jiǎn)單開環(huán)速度控制到基于步進(jìn)電機(jī)的高級(jí)閉環(huán)運(yùn)動(dòng)控制。