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TEA3718-TEA3718.-TEA3718SFPTR
STEPPER MOTOR DRIVER
TEA3718
TEA371 8SSTEPPER MOTOR DRIVER
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 IN
STEPS OR VARIED CONTINUOUSLY
THERMAL OVERLOAD PROTECTION
ALARM OUTPUT OR PRE-ALARM OUTPUT
(see internal table)
DESCRIPTIONThe TEA3718 and TEA3718S are bipolar monolithic
integrated circuits intended to control and drive the
current in one winding of a bipolar stepper motor.
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
or TEA3718S and a few external components form
a complete control and drive unit for LS-TTL or mi-
croprocessor-controlled stepper motor systems.
PIN CONNECTIONS (top views)1/16
July 2003
BLOCK DIAGRAM TEA3718S
BLOCK DIAGRAM TEA3718
TEA3718-TEA3718S2/16
PIN FUNCTIONS
TEA3718-TEA3718S3/16
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA Soldered on a 35 μm thick 4 cm2 PC board copper area.
RECOMMENDED OPERATING CONDITIONS
COMPARISON TABLE
TEA3718-TEA3718S4/16
MAXIMUM POWER DISSIPATION
Figure 1.RS = 1 Ω INDUCTANCE FREE
RC = 470 Ω
CC = 820 pF CERAMIC
Rt = 56 kΩ
Ct = 820 pF CERAMIC
P = 500 Ω
R2 = 1 K
Figure 2.
TEA3718-TEA3718S5/16
