TEA3718S STMicroelectronics, TEA3718S Datasheet
TEA3718S
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TEA3718S Summary of contents
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... 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) ...
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... TEA3718-TEA3718S BLOCK DIAGRAM TEA3718S BLOCK DIAGRAM TEA3718 2/16 ...
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... When T PRE-ALARM When T Fu nctio off T T and the two inputs IN0 and IN1 determines S reaches T1 C the alarm output becomes low (TEA3718SP) j reaches T2 C the prealarm output becomes low (T2<T1) (TEA3718SFP) j TEA3718-TEA3718S C . The lower power transistor 0. off 3/16 ...
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... Supply Voltage S i Output Current m T Ambient Temperature amb t Rise Time Logic Inputs r t Fall Time Logic Inputs f COMPARISON TABLE Device Current TEA3718SDP 1.5A TEA3718SFP 1.5A TEA3718SP 1.5A TEA3718DP 1.5A 4/16 SO -20L Parameter Package Alarm Powerdip 12+2+2 SO-20L Multiwatt-15 Powerdip 12+2+2 not connected Valu ...
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... MAXIMUM POWER DISSIPATION Figure INDUCTANCE FREE 470 820 pF CERAMIC 820 pF CERAMIC 500 TEA3718-TEA3718S Figure 2. 5/16 ...
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... Source Diode Transistor Pair Saturation sat Voltage V Diode Forward Voltage f I Substrate Leakage Current sub V Sink Diode Transistor Pair Saturation sat Voltage V Diode Forward Voltage f Notes: (...) Only for TEA3718SFP mounted in SO-20L package. 6/16 = 5V, 5 10V to 45V ...
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... TEA3718-TEA3718S 7/16 ...
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... TEA3718-TEA3718S FUNCTIONAL BLOCKS Figure A: ALARM OUTPUT (TEA3718SP - TEA3718DP) Figure B: PRE-ALARM OUTPUT (TEA3718SDP - TEA3718SFP) TEA3718S 8/16 TEA3718 ...
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... ALARM OUTPUTS (TEA3718SP - TEA3718DP) The alarm output becomes low when the junc- tion temperature reaches T C. When an alarm condition occours, parts of the supply voltage (dividing bridge the comparator input pin (Fig. A) Depending of the R C value the behaviour of C the circuit is different on alarm condition: > ...
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... TEA3718-TEA3718S Figure E: (typical curve) Current Reduction in the Motor on Alarm Condition. Notes: 1. Resistance values given here are for the V V value. ref TYPICAL APPLICATION Phase A IN0A IN1A Phase B IN0B IN1B 10/16 Figure F: (V 5V) Block Diagram for Half Cur- ref rent on Alarm Condition. threshold. They should be adjusted using other comparators threshold or other ...
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... and power-off ANALOG CONTROL The current levels can be varied continuously varied with a circuit varying the voltage on the comparator terminal. POWER LOSSES be thus off TEA3718-TEA3718S , it is off and V . Normal dV/dt val- S during power established. R OUTPUT CURRENT S 11/16 ...
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... TEA3718-TEA3718S APPLICATION NOTES MOTOR SELECTION Some stepper motors are not designed for continu- ous operation at maximum current. As the circuit drives a constant current through the motor, its tem- perature might increase exceedinglyboth at low and high speed operation. Also, some stepper motors have such high core losses that they are not suited for switch mode cur- rent regulation ...
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... TEA3718-TEA3718S inch TYP. MAX. 0.197 0.104 0.063 0.039 0.022 0.030 0.050 0.060 0.700 0.710 0.795 0.874 0.886 0.870 0.886 0.713 0.689 0.699 0.421 0.429 0.114 0.179 0.191 0.200 0.218 0.102 ...
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... TEA3718-TEA3718S POWERDIP 16 PACKAGE MECHANICAL DATA DIM. MIN. a1 0. 14/16 mm TYP. MAX. MIN. 0.020 1.40 0.033 0.50 0.50 0.015 20.0 8.80 2.54 17.78 7.10 5.10 3.30 1.27 inch TYP. MAX. 0.055 0.020 0.020 0.787 0.346 0.100 0.700 0.280 0.201 0.130 0.050 ...
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... SO20 PACKAGE MECHANICAL DATA DIM. MIN 0 0. 7 TYP. MAX. MIN. 2.65 0.3 0.004 2.45 0.49 0.014 0.32 0.009 0.5 45 (typ.) 13.0 0.496 10.65 0.394 1.27 11.43 7.6 0.291 1.27 0.020 0.75 8 (max.) TEA3718-TEA3718S inch TYP. MAX. 0.104 0.012 0.096 0.019 0.013 0.020 0.512 0.419 0.050 0.450 0.299 0.050 0.030 15/16 ...
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... TEA3718-TEA3718S 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 ...