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POWERSTEP01 Datasheet(PDF) 42 Page - STMicroelectronics

No. de pieza POWERSTEP01
Descripción Electrónicos  System-in-package integrating microstepping controller and 10 A power MOSFETs
PDF  92 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

POWERSTEP01 Datasheet(HTML) 42 Page - STMicroelectronics

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Phase current control: voltage mode
powerSTEP01
42/92
DocID025022 Rev 5
Motor supply voltage compensation can be enabled setting high the EN_VSCOMP bit of the
CONFIG register (seeTable 46 on page 68). If the EN_VSCOMP bit is low, the
compensation is disabled and the internal analog to digital converter is at the user’s
disposal; the sampling rate is always equal to PWM frequency.
8.6
Winding resistance thermal drift compensation
The higher the winding resistance the greater the voltage to be applied in order to obtain the
same phase current.
The powerSTEP01 integrates a register (K_THERM) which can be used to compensate
phase resistance increment due to temperature rising.
The value in the K_THERM register (Section 11.1.15 on page 57) multiplies duty cycle value
allowing the higher phase resistance value to be faced.
The compensation algorithm and the eventual motor temperature measurement should be
implemented by microcontroller firmware.



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