SGS Thomson Microelectronics TEF3718SSP, TEF3718SP, TEF3718SDP, TEF3718DP Datasheet
.HALF AND FULL-STEP MODES
.BIPOLAR DRIV E 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 IN
STEPS OR VARIED CONTINUOUSLY
.THERMAL OVERLOAD PROTECTION
.ALARM OUTPUT (TEF3718SP) OR PRE-
ALARM OUTPUT (TEF3718SSP)
DESCRIPTION
The TEF3718 and TEF371 8S are bipolar m onolithic
integrated circuits intended to control and drive the
current in one widing of a bipola r stepper motor. The
circuits c ons is t s of an LS - TLL - c om pat i ble logic input, a current sensor, a monos table and an output
stage with built-in protection diodes. Two TEF3718
or TEF3718S and a few external components form
a complete contr ol and driv e unit for LS -T TL or microproce ss or c ont r olle d s te pper m ot or systems.
TEF3718
TEF3718S
STEPPER MOTOR DRIVER
POWERDIP 12 + 2 + 2
ORDER CODE :
TEF3718DP TEF3718SDP
MULTIWATT 15
ORDER CODE :
TEF3718SP TEF3718SSP
PIN CONNECTON
TEF3718 TEF3718 S TEF3718
October 199 1
TEF3718 S
1/8
TEF3718-TEF3718S
BLOCK DIAGRAM (TEF3718)
BLOCK DIAGRAM (TEF3718S)
2/8
TEF3718-TEF3718S
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
T
T
THERMAL CHARACTERISTICS
Symbol Parameter Value Unit
R
R
Supply Voltage 7
CC
MM
V
Input Voltage :
I
Logic Inputs
Analog Inputs
Reference Input
I
Input Current :
I
Logic Inputs
Analog Inputs
I
Output Current ± 1.5 A
O
T
Junction Temperature + 150 C
j
Operating Ambient Temperature Range – 40 to + 85 °C
oper
Storage Temperature Range – 55 to 150 °C
stg
Maximum Junction-case Thermal Resistance
th(j -c)
POWERDIP
MULTIW
Maximum Junction-ambient Thermal Resistance
th(j -a)
POWERDIP
MULTIW
50
6
V
CC
15
10
10
11
3
45 (*)
40
V
V
mA
°C/W
°C/W
(*) Soldered on a 35 µm thick 20 cm2 PC board coope r area.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min. Typ. Max. Unit
V
V
T
Supply Voltage 4.75
CC
MM
I
Output Current 0.020 – 1.2 A
m
Ambient Temperature – 40 – 85 °C
amb
t
Rise Time Logic Inputs – – 2 µs
r
Fall Time Logic Inputs – – 2 µs
t
f
10
5
–
5.25
45
V
3/8
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