LB11946 Datasheet, PDF (1/12 Pages) Sanyo Semicon Device – PWM Current Control Stepping Motor Driver

Ordering number : ENN7946
LB11946
Monolithic Digital IC
PWM Current Control Stepping
Motor Driver
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 microstepping 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
Absolute 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
Allowable power dissipation (IC internal)
Operating temperature
Storage temperature
Symbol
VBB
I_O peak
I_O max
V_CC
V_IN
VE
VE
Pdmax
Topr
Tstg
Conditions
tw ≤ 20 µS
V_CC = 5 V specifications
V_CC = 3.3 V specifications
Ta = 25°C, independent IC
Ratings
Unit
50
V
1.2
A
1.0
A
7.0
V
−0.3 to V_CC
V
1.0
V
0.5
V
3.0
W
−20 to +85
°C
−55 to +150
°C
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.
N2206 / 73004TN(OT) No.7946-1/12