描述 Description

The SG1731 is a pulse width modulator circuit designed specifically for DC motor control. It provides a bi-directional pulse train output in response to the magnitude and polarity of an analog error signal input. The device is useful as the control element in motor-driven servo systems for precision positioning and speed control, as well as in audio modulators and amplifiers using carrier frequencies to 350 kHz. The circuit contains a triangle waveform oscillator, a wideband operational amplifier for error voltage generation, a summing/scaling network for level-shifting the triangle waveform, externally programmable PWM comparators and dual ±100 mA, ±22 V totem pole drivers with commutation diodes for full bridge output. A SHUTDOWN terminal forces the drivers into a floating high-impedance state when driven LOW. Supply voltage to the control circuitry and to the output drivers may be from either dual positive and negative supplies, or single-ended.Microchip Ordering Part? Standard Microcircuit Drawing (SMD)SG1731J-DESC Cross Reference 5962-9669901MEASG1731J-DESC Cross Reference 5962-9669901MEX

特性 Features

±3.5 V to ±15 V Control Supply
±2.5 V to ±22 V Driver Supply
Dual 100 mA Source/Sink Output Drivers
5 kHz to 350 kHz Oscillator Range
High Slew Rate Error Amplifier
Adjustable Deadband Operation
Digital SHUTDOWN Input

簡(jiǎn)介

SG1731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SG1731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。