LB1946 Datasheet, PDF (1/16 Pages) Sanyo Semicon Device – LB1946

Ordering number : EN7115
LB1946
Monolithic Digital IC
PWM Current Control Stepping Motor Driver
http://onsemi.com
Overview
The LB1946 is stepping motor drive 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 supports for microstepping drive from 1-2 phase
excitation 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.
Applications
• PWM current control stepping motor drivers
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 output 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
Absolute Maximum Ratings at Ta = 25°C
Parameter
Motor supply voltage
Peak output current
Maximum continuous output current
Logic system supply voltage
Logic input voltage range
Emitter output voltage
Operating temperature
Storage temperature
Allowable power dissipation (IC internal)
Symbol
VBB
IO PEAK
IO max
VCC
VIN
VE
Topr
Tstg
Pd max
Conditions
tw≤20μs
Ta=25°C, independent IC
Ratings
Unit
50
V
1.75
A
1.5
A
7.0
V
-0.3 to VCC
V
1.0
V
-20 to +85
°C
-55 to +150
°C
3.0
W
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
June, 2013
11707 SY IM B8-5416 No.7115-1/16