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TPL7407LDR Fiches technique(PDF) 11 Page - Texas Instruments |
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TPL7407LDR Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 23 page TPL7407L IN3 IN4 OUT1 OUT2 OUT3 OUT4 IN5 IN6 IN7 GND OUT5 OUT6 OUT7 COM IN1 IN2 Phase_C Phase_B Phase_D Motor Phase_A VSUP Optional CCOM Motor Control Pulses (1.8 V to 5 V) 11 TPL7407L www.ti.com SLRS066D – JANUARY 2014 – REVISED MARCH 2016 Product Folder Links: TPL7407L Submit Documentation Feedback Copyright © 2014–2016, Texas Instruments Incorporated 8.2.2 Unipolar Stepper Motor Driver Figure 11. Stepper Motor Driver Schematic 8.2.2.1 Design Requirements Figure 11 shows an implementation of TPL7407L for driving a uniploar stepper motor. The unconnected input channels can be used for other functions. When an input pin is left open the internal 1 M Ω pull down resistor pulls the respective input pin to GND potential. For higher noise immunity use an external short across an unconnected input and GND pins. The COM pin must be tied to the supply of whichever inductive load is being driven for the driver to be protected by the free-wheeling diode. Whenever a Zener diode is used between Vcom and the motor supply, the Vcom pin will slew from the coil supply to a voltage that is the sum of the Zener voltage and the coil supply when there is a flyback event. Depending on the coil inductance and resistance, this can be very rapid. Whenever the COM pin experiences a slew rate greater than 0.5 V/µs, a capacitor must be added to limit the slew to < 0.5 V/µs. See Power Supply Recommendations for further explanation. 8.2.2.2 Detailed Design Procedure Refer to Design Requirements. 8.2.2.3 Application Curves Refer to Thermal Characteristics. |
Numéro de pièce similaire - TPL7407LDR |
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Description similaire - TPL7407LDR |
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