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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
Power DIP 12+2+2
SO20
Multiwatt™ 15
Figure 1.
Block diagram
Applications
Motor winding
The TEA3718 is a bipolar monolithic integrated
circuit intended to control and drive the current in
one winding of a bipolar stepper motor.
OUT A
OUT B
COMPARATOR
INPUT
Description
PHASE
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.
PULSE TIME
IN0
IN1
REFERENCE
TEA3718
ALARM
(TEA3718SP)
PRE-ALARM
(TEA3718SFP)
SENSE
RESISTOR
Table 1. Device summary
Order code
Package
TM: Multiwatt is a trademark of STMicroelectronics
E-TEA3718SDP
Power DIP
E-TEA3718DP
E-TEA3718SFP
SO20
E-TEA3718SFPTR
SO20 (tape and reel)
E-TEA3718SP
Multiwatt™ 15
January 2009
Rev 2
1/26
www.st.com
26
Pin connections
1
Pin connections
Figure 2.
Package pin locations (top views)
E-TEA3718SP
(Multiwatt 15)
2/26
E-TEA3718SFP
(SO20)
E-TEA3718DP
E-TEA3718SDP
(Power DIP 12+2+2)
Contents
Contents
1
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2
Device diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
5
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7