SPMD150STP STMicroelectronics, SPMD150STP Datasheet - Page 14

• Manufacturer Part Number: SPMD150STP
• Description: MOD STEPPER MOTOR DRV 1.5A BIPO
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of SPMD150STP

• Motor Type: Stepper, Bipolar
• Number Of Motors: 1
• Current - Output: 1.5A
• Transistor Type: MOSFET
• Termination Style: PC Pin
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 50 V
• Supply Current: 1.5 A
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10065

Function description and application information
14/23
Figure 12. VREFA and VREFB internal connection
The voltage at VREFA and VREFB can be supplied in two way:
●
Figure 13. VREFx from an external source
●
●
Use following equation to calculate Rx:
Using an external source (see
separately as in the micro-stepping mode (i.e: a micro-controller fixes a variable voltage
to get variable current in the stepper motor phases).
Using the module reference voltage source, REF (pin2) (see
1.225 V. The REF pin has a 10 kΩ resistor in series, take that in account during design.
In this case a proper resistor Rx must be connected between REF and GND1, VREFA
and VREFB will be connected together to REF pin (see
Rx = (500 x I
OUTx
) / [319 - (60 x I
Doc ID 17160 Rev 1
Figure
OUTx
13), driving VREFA and VREFB pins together or
)] [kΩ]
where I
Figure
OUTx
Figure
14).
= [A]
14), which supplies
SPMD150STP