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STK672-432AN-E Fiches technique(PDF) 6 Page - ON Semiconductor |
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STK672-432AN-E Fiches technique(HTML) 6 Page - ON Semiconductor |
6 / 26 page STK672-432AN-E No.A2295-6/26 Sample Application Circuit (2W1-2 Phase Excitation Drive /micro stepping operation) Precautions [GND wiring] To reduce noise on the 5V/24V system, be sure to place the GND of C01 in the circuit given above as close as possible to Pin 2 and Pin 6 of the hybrid IC. In addition, in order to set the current accurately, the GND side of RO2 of Vref must be connected to the shared ground terminal used by the Pin 18 (S.G) GND, P.G1 and P.G2. [Input pins] If VDD is being applied, use care that each input pin does not apply a negative voltage less than -0.3V to S. GND, Pin 18. Measures must also be taken so that a voltage equal to or greater than VDD is not input. High voltage input other than VDD, MOI, FAULT1, and FAULT2 is 2.5V. Pull-up resistors are not connected to input pins. Pull-down resistors are attached. When controlling the input to the hybrid IC with the open collector type, be sure to connect a pull-up resistor (1 to 20k ). Be sure to use a device (0.8V or less, low level, when IOL=5mA) for the open collector driver at this time that has an output voltage specification such that voltage is pulled to less than 0.8V at low level. When using the power on reset function built into the hybrid IC, be sure to directly connect Pin 14 to VDD. We recommend attaching a 1,000pF capacitor to each input to prevent malfunction during high-impedance input. Be sure to connect the capacitor near the hybrid IC, between Pin 18 (S, G). When input is fixed low, directly connect to Pin 18. When input is fixed high, directly connect to VDD. [Current setting Vref] Considering the specifications for the Vref input bias current IIB, we recommend a value 1k or less for R02. If the motor current is temporarily reduced, the circuit given below is recommended. The variable voltage range of Vref input is 0.14 to 1.48V. STK672 -43xAN-E + 9 12 15 10 13 7 14 19 18 6 2 5 4 1 3 VDD 5V CLOCK ENABLE CWB MOI RESETB FAULT1 A AB B BB Vref R01 S.GND R02 P.G1 P.G2 P.GND C01 100μ 2-phase stepper motor 16 8 FAULT2 11 17 + C02 10μ Vcc=24V |
Numéro de pièce similaire - STK672-432AN-E |
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Description similaire - STK672-432AN-E |
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