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UC1517J Scheda tecnica(PDF) 1 Page - Texas Instruments |
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UC1517J Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 12 page 8/94 Stepper Motor Drive Circuit UC1517 UC3517 ABSOLUTE MAXIMUM RATINGS Second Level Supply, VSS . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Phase Output Supply, VMM . . . . . . . . . . . . . . . . . . . . . . . . . 40V Logic Supply, VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Logic Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . -.3V to +7V Logic Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10mA Output Current, Each Phase . . . . . . . . . . . . . . . . . . . . . . 500mA Output Current, Emitter Follower . . . . . . . . . . . . . . . . . . -500mA Power Dissipation, (Note). . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W Power Dissipation, (Note) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2W Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Ambient Temperature, UC1517 . . . . . . . . . . . . -55°C to +125°C Ambient Temperature, UC3517 . . . . . . . . . . . . . . 0°C to +70°C Storage Temperature . . . . . . . . . . . . . . . . . . . -55°C to +150°C Note: Consult Packaging section of Databook for thermal limitations and considerations of package. BLOCK DIAGRAM FEATURES • Complete Motor Driver and Encoder • Continuous Drive Capability 350mA per Phase • Contains all Required Logic for Full and Half Stepping • Bilevel Operation for Fast Step Rates • Operates as a Voltage Doubler • Useable as a Phase Generator and/or as a Driver • Power-On Reset Guarantees Safe, Predictable Power-Up DESCRIPTION The UC3517 contains four NPN drivers that operate in two-phase fashion for full-step and half-step motor control. The UC3517 also contains two emitter followers, two monostables, phase de- coder logic, power-on reset, and low-voltage protection, making it a versatile system for driving small stepper motors or for control- ling large power devices. The emitter followers and monostables in the UC3517 are config- ured to apply higher-voltage pulses to the motor at each step command. This drive technique, called “Bilevel,” allows faster stepping than common resistive current limiting, yet generates less electrical noise than chopping techniques. |
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