SPMD150STP STMicroelectronics, SPMD150STP Datasheet - Page 13

• 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

SPMD150STP
Function description and application information
module, fixing a typical 16 µs off time for both bridges. The toff value can be modified adding
a capacitor to GND1, increasing the off time, or adding a resistor to GND1 decreasing the
Off-time.
Figure 10. toff setting circuit
Roff = Ra // 56kΩ [kΩ], Coff = Ca + 470pF [pF]
Figure 11. toff versus Roff and Coff
To set the maximum motor phase current it is necessary to give the proper reference voltage
at input VREFA (pin6) and VREFB (pin11).
The relationship between the voltage at VREFx pin and the phase current I
is the
OUTx
following:
I
= VREFx / 0.192 [A]
OUTx
An internal 100 kΩ resistor and a 470 pF capacitor are connected in parallel between
VREFx and GND1 (see
Figure
12).
Doc ID 17160 Rev 1
13/23