E-TEA3718DP STMicroelectronics, E-TEA3718DP Datasheet
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E-TEA3718DP
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E-TEA3718DP Summary of contents
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... TEA3718 ICs and a few external components form a complete control and drive unit for LS-TTL or microprocessor-controlled stepper motor systems. Table 1. Device summary Order code E-TEA3718SDP Power DIP E-TEA3718DP E-TEA3718SFP SO20 E-TEA3718SFPTR SO20 (tape and reel) E-TEA3718SP Multiwatt™ 15 January 2009 Power DIP 12+2+2 Figure 1 ...
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... Pin connections 1 Pin connections Figure 2. Package pin locations (top views) E-TEA3718SP (Multiwatt 15) 2/26 E-TEA3718SFP E-TEA3718DP (SO20) E-TEA3718SDP (Power DIP 12+2+2) ...
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... Contents 1 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Device diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 Functional blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 Alarm output (TEA3718SP, TEA3718DP and TEA3718SDP 4.2 Pre-alarm output (TEA3718SFP 4.3 Current reduction in alarm condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4 ...
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... Contents 6 Application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.1 Motor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.2 Unused inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.3 Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.4 Operating sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4/26 ...
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... Device diagrams Figure 3. Detailed block diagram (TEA3718SFP) Figure 4. Detailed block diagram (TEA3718SP) Device diagrams 5/26 ...
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... V Supply voltage input for logic circuitry SS This pin and pin IN0 are logic inputs which select the outputs of three comparators to set IN1 the current level. Current also depends on the sensing resistor and reference voltage. Table 8: Truth table See This TTL-compatible logic input sets the direction of current flow through the load ...
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... Recommended operating conditions Table 5. Recommended operating conditions Symbol Parameters V Supply voltage SS Vs Supply voltage I Output current m T Ambient temperature amb t Rise time for logic inputs r t Fall time for logic inputs f Parameters SO20 Power DIP 4. 0.020 - Electrical specifications Value Unit 7 ...
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... Thermal data Table 6. Thermal data Symbol Parameters R (j-c) Maximum junction-case thermal resistance th R (j-a) Maximum junction-ambient thermal resistance Soldered µm thick 4 cm Figure 5. Maximum power dissipation Figure 6. Typical external component configuration 8/26 SO20 16 ( board copper area Power DIP Multiwatt 15 Unit o ...
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... Figure 7. Output waveforms Electrical specifications 9/26 ...
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... Source diode forward voltage f I Substrate leakage current sub Sink diode transistor pair Vsat(sink) saturation V (sink diode) Sink diode forward voltage Vss = 5 V, ± 5%, Vmm = 45V, Tamb = 0 to 70oC (Tamb = 25 2. Values in parentheses apply only to E-TEA3718SFP and E-TEA3718SFPTR mounted in SO20 package. 10/26 (1) Parameter ...
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... Figure 8. Sink driver V sat against I CE Figure 9. Lower diode V against I f Figure 10. Source driver V CE and T out j and T OUT j sat against I and T OUT j Electrical specifications 11/26 ...
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... Electrical specifications Figure 11. Upper diode V Figure 12. I against junction temperature ref Figure 13. Comparator input current against T 12/26 against I and T f OUT j and ...
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... Functional blocks Figure 14. Alarm output (TEA3718SP) Figure 15. Pre-alarm output (TEA3718SFP) Functional blocks 13/26 ...
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... Functional blocks 4.1 Alarm output (TEA3718SP, TEA3718DP and TEA3718SDP) The ALARM output pin becomes low when the junction temperature reaches T ° C. When an alarm condition occurs, parts of the supply voltage (dividing bridge comparator input pin ( an alarm condition is as follows: ● R > 80 ohms, the output stage is switched off C ● ...
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... Figure 17. Common detection for several Multiwatt packages 4.2 Pre-alarm output (TEA3718SFP) When the junction temperature reaches T1° C (typically = 170 ° pre-alarm signal is generated on the PRE-ALARM output pin. Soft thermal protection occurs when function temperature reaches T2 (T2 > T1). 4.3 Current reduction in alarm condition ...
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... Functional blocks Figure 19. Half-current on alarm condition circuit (V 4.4 Typical application Figure 20. Typical application circuit 16/ ref = ...
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... The circuit is intended to drive a bipolar constant current through one motor winding. The constant current is generated through switch mode regulation. There is a choice of three different current levels with the two logic inputs lN0 and lN1. The current can also be switched off completely. ...
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... The circuit stands any order of turn-on or turn-off the supply voltages V dV/dt values are then assumed. Preferably, V should track V R 5.7 Analog control The current levels can be varied continuously varied with a circuit varying the voltage on the comparator terminal. Figure 21. Power losses against output current 18/26 . toff = 0.69 ⋅ R and C C ...
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... Some stepper motors are not designed for continuous operation at maximum current. As the circuit drives a constant current through the motor, its temperature might increase excessively both at low and high speed operation. Also, some stepper motors have such high core losses that they are not suited for switch mode current regulation. 6.2 ...
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... Application notes 6.4 Operating sequence Figure 22. Principal operating sequence 20/26 ...
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... Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: ECOPACK® trademark. Package mechanical data www.st.com . 21/26 ...
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... Package mechanical data 22/26 ...
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... Package mechanical data 23/26 ...
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... Package mechanical data 24/26 ...
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... Revision history Table 9. Document revision history Date 24-Jan-2006 21-Jan-2009 Revision 1 Initial release. Document reformatted. 2 Figure 1 Added . Revision history Changes 25/26 ...
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