E-TEA3718DP Datasheet, PDF (1/26 Pages) STMicroelectronics – Stepper motor driver

TEA3718
Stepper motor driver
Features
■ Half-step and full-step mode
■ Bipolar drive of stepper motor for maximum
motor performance
■ Built-in protection diodes
■ Wide range of current control 5 to 1500 mA
■ Wide voltage range 10 to 50 V
■ Designed for unstabilized motor supply voltage
■ Current levels can be selected insteps or
varied continuously
■ Thermal overload protection
■ Alarm output or pre-alarm output
Applications
The TEA3718 is a bipolar monolithic integrated
circuit intended to control and drive the current in
one winding of a bipolar stepper motor.
Description
The circuits consist of an LS-TTL compatible logic
input, a current sensor, a monostable and an
output stage with built-in protection diodes. Two
TEA3718 ICs and a few external components
form a complete control and drive unit for LS-TTL
or microprocessor-controlled stepper motor
systems.
Table 1. Device summary
Order code
Package
E-TEA3718SDP
E-TEA3718DP
Power DIP
E-TEA3718SFP
E-TEA3718SFPTR
SO20
SO20 (tape and reel)
E-TEA3718SP
Multiwatt™ 15
Power DIP 12+2+2
SO20
Multiwatt™ 15
Figure 1. Block diagram
COMPARATOR
INPUT
PHASE
PULSE TIME
IN0
IN1
REFERENCE
Motor winding
OUT A OUT B
TEA3718
ALARM
(TEA3718SP)
PRE-ALARM
(TEA3718SFP)
SENSE
RESISTOR
TM: Multiwatt is a trademark of STMicroelectronics
January 2009
Rev 2
1/26
www.st.com
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