LB11946_09 Datasheet, PDF (1/14 Pages) Sanyo Semicon Device – PWM Current Control Stepping Motor Driver

Ordering number : EN7946A
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 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
Unit
50
V
1.2
A
1.0
A
7.0
V
-0.3 to VCC
V
1.0
V
0.5
V
3.0
W
-25 to +85
°C
-55 to +150
°C
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the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
22509 MS 20090212-S00006 / N2206 / 73004TN(OT) No.7946-1/14