LB1946_07 Datasheet, PDF (1/16 Pages) Sanyo Semicon Device – PWM Current Control Stepping Motor Driver

Ordering number : EN7115
LB1946 ^{Monolithic Digital IC}
PWM Current Control Stepping Motor Driver
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
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
11707 SY IM B8-5416 No.7115-1/16