TEA3718 STMicroelectronics, TEA3718 Datasheet
TEA3718
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TEA3718 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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... SENSE RESISTOR Connection to lower emitters of output stage for insertion of current sense resistor ALARM When T PRE-ALARM When T = 0.69 R off reaches T1 C the alarm output becomes low (TEA3718SP) j reaches T2 C the prealarm output becomes low (T2<T1) (TEA3718SFP) j TEA3718-TEA3718S Function The lower power transistor ...
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... 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 Parameters Parameter Parameter Package Powerdip 12+2+2 SO-20L Multiwatt-15 Powerdip 12+2+2 Value -10 -10 1.5 ...
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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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... Reference Input Current, V ref V 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 Parameter ...
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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) 8/16 TEA3718S 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 Phase B 10/16 Figure F: (V threshold. They should be adjusted using other comparators threshold or other ch IN0A IN1A IN0B IN1B ...
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... Preferably and power-off if V ANALOG CONTROL The current levels can be varied continuously varied with a circuit varying the voltage on the comparator terminal. POWER LOSSES When the current S be thus off TEA3718-TEA3718S . off , and V . Normal dV/dt val should be tracking established. S OUTPUT CURRENT off ...
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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 exceedingly both 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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... TYP. MAX. MECHANICAL DATA 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 0.102 0.152 TEA3718-TEA3718S OUTLINE AND Multiwatt15 V 13/16 ...
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... TEA3718-TEA3718S mm DIM. MIN. TYP. MAX. a1 0.51 0.020 B 0.85 1.40 0.033 b 0.50 b1 0.38 0.50 0.015 D 20.0 E 8.80 e 2.54 e3 17.78 F 7.10 I 5.10 L 3.30 Z 1.27 14/16 inch MIN. TYP. MAX. 0.055 0.020 0.020 0.787 0.346 0.100 0.700 0.280 0.201 0.130 0.050 OUTLINE AND MECHANICAL DATA ...
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... E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max inch MECHANICAL DATA TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.050 0.419 0.030 0.050 TEA3718-TEA3718S OUTLINE AND SO20 h x 45˚ SO20MEC 15/16 ...
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... TEA3718-TEA3718S Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the conse- quences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No li- cense is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publi- cation are subject to change without notice ...