Stepping Motor Driver
Ordering number : EN7946A
LB11946
Monolithic Digital IC
PWM Current Control
Stepping Motor Driver
http://onsemi.com
O...
Description
Ordering number : EN7946A
LB11946
Monolithic Digital IC
PWM Current Control
Stepping Motor Driver
http://onsemi.com
Overview
The LB11946 is a stepping motor driver IC that implements PWM current control bipolar drive with a fixed off time. This IC features 15 current setting levels using a fixed VREF voltage and support for micro-stepping drive from 1-2 phase excitation drive to 4W1-2 phase excitation drive. This device is optimal for driving stepping motors such as those used for carriage drive and paper feed in printers.
Features
PWM current control (with a fixed off time) Logic input serial-parallel converter (allows 1-2, W1-2, 2W1-2, and 4W1-2 phase excitation drive) Current attenuation switching function (with slow decay, fast decay, and mixed decay modes) Built-in upper and lower side diodes Simultaneous on state prevention function (through current prevention) Noise canceller function Thermal shutdown circuit Shutoff on low logic system voltage circuit Low-power mode control pin
Specifications
Maximum Ratings at Ta = 25°C
Parameter Motor supply voltage Peak output current Continuous output current Logic system supply voltage Logic input voltage range Emitter output voltage
Symbol
VBB IO peak IO max VCC VIN VE
Allowable power dissipation Operating temperature Storage temperature
Pd max Topr Tstg
tw ≤ 20μS
Conditions
VCC = 5V specifications VCC = 3.3V specifications Independent IC
Ratings 50 1.2 1.0 7.0
-0.3 to VCC 1.0 0.5 3.0
-25 to +85 -5...
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