TEF3718 STMICROELECTRONICS | Alldatasheet

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Technical content

.HALF AND FULL-STEP MODES .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 (TEF3718SP) OR PRE- ALARM OUTPUT (TEF3718SSP)

DESCRIPTION

The TEF3718 and TEF3718S are bipolar monolithic integrated circuits intended to control and drive the current in one widing of a bipolar stepper motor. The circuits consists of an LS-TLL - compatible logic in- put, a current sensor, a monostable and an output stage with built-in protection diodes. Two TEF3718 or TEF3718S and a few external components form a complete control and drive unit for LS-TTL or mi- croprocessor controlled stepper motor systems. POWERDIP 12 + 2 + 2 ORDER CODE : TEF3718DP TEF3718SDP MULTIWATT 15 ORDER CODE : TEF3718SP TEF3718SSP PIN CONNECTON TEF3718 TEF3718S TEF3718 TEF3718S

BLOCK DIAGRAM (TEF3718) BLOCK DIAGRAM (TEF3718S) TEF3718-TEF3718S

Symbol Parameter Value Unit VCC VMM Supply Voltage 7 V VI Input Voltage : Logic Inputs Analog Inputs Reference Input VCC V II Input Current : Logic Inputs Analog Inputs mA IO Output Current ± 1.5 A Tj Junction Temperature + 150 C Toper Operating Ambient Temperature Range – 40 to + 85 °C Tstg Storage Temperature Range – 55 to 150 °C THERMAL CHARACTERISTICS Symbol Parameter Value Unit R th(j-c) Maximum Junction-case Thermal Resistance POWERDIP MULTIW °C/W R th(j-a) Maximum Junction-ambient Thermal Resistance POWERDIP MULTIW 45 (*) °C/W RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min. Typ. Max. Unit VCC VMM Supply Voltage 4.75 5.25 V Im Output Current 0.020 – 1.2 A Tamb Ambient Temperature – 40 – 85 °C tr Rise Time Logic Inputs – – 2 µs tf Fall Time Logic Inputs – – 2 µs (*) Soldered on a 35 µm thick 20 cm2 PC board cooper area. TEF3718-TEF3718S

ELECTRICAL CHARACTERISTICS

VCC = 5 V ± 5 %. VMM = – 10 V to + 45 V. Tamb = – 40 C to + 25 °C (Unless otherwise specified) Symbol Characteristics Min. Typ. Max. Unit ICC Supply Current 25 mA VIH High Level Input Voltage Logic Input 2 V VIL Low Level Input Voltage Input 0.7 V IIH High Level Input Current Logic Input (VI = 2.4 v) 20 µA IIL Low Level Input Current Logic Input (VI = 0.4 v) 0.4 µA VCH VCM VCL Comparator Treshold Voltage (VR = + 5 V) I O = 0 I1 = 0 IO = 1 I1 = 0 IO = 0 I1 = 1 390 230 420 250 440 270 mV ICO Comparator Input Current — 20 20 µA Ioff Output Leakage Current (IO 1, I1 = 1) 100 µA Vsat Total Saturation Voltage Drop (Im = 1 A,) POWERDIP MULTIWATT 2.9 3.3 V Ptot Total Power Dissipation (Im = 1 A, fs = 30 kHz) 3.1 3.6 W toff Cutt off Time (see figures 1 and 2 Vmm = +10 V, Vton ≤ 5 µs) 25 30 35 µs td Turn off Delay (see figures 1 and 2, Tamb = + 25 °C dVC/dt ≤ 50 mV/µs 1.6 µs Vsat Alarm Output Saturation Voltage IO = 2 mA 0.8 V Iref Reference Input Current, VR = 5 V 0.4 1 mA Vsat Vf Isub Source Diode Transistor Pair Saturation Voltage Diode Forward Voltage Substrate Leakage Current MULTIWATT POWERDIP I m = 0.5 A Im = 1 A Im = 0.5 A Im = 1 A If = 0.5 A If = 1 A If = 1 A 1.35 1.75 1.25 1.55 1.5 1.7 mA Vsat Vf Sink Diode Transistor Pair Saturation Voltage Diode Forward Voltage MULTIWATT POWERDIP Im = 0.5 A Im = 1 A Im = 0.5 A Im = 1 A If = 0.5 A If = 1 A 1.35 1.55 1.25 1.35 1.5 1.8 mA TEF3718-TEF3718S

Figure 1. Figure 2.

MULTIWATT15 PACKAGE MECHANICAL DATA DIM. mm inch A 5 0.197 B 2.65 0.104 C 1.6 0.063 D 1 0.039 E 0.49 0.55 0.019 0.022 F 0.66 0.75 0.026 0.030 H1 19.6 0.772 H2 20.2 0.795 L2 17.65 18.1 0.695 0.713 L7 2.65 2.9 0.104 0.114 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 TEF3718-TEF3718S

POWERDIP 16 PACKAGE MECHANICAL DATA DIM. mm inch a1 0.51 0.020 B 0.85 1.40 0.033 0.055 b 0.50 0.020 b1 0.38 0.50 0.015 0.020 D 20.0 0.787 E 8.80 0.346 e 2.54 0.100 e3 17.78 0.700 F 7.10 0.280 I 5.10 0.201 L 3.30 0.130 Z 1.27 0.050 TEF3718-TEF3718S

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifica- tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre- viously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. © 1994 SGS-THOMSON Microelectronics - All Rights Reserved MULTIWATT® is a Registered Trademark of the SGS-THOMSON Microelectronics SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. TEF3718-TEF3718S