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L6474PD Folha de dados(PDF) 29 Page - STMicroelectronics

Nome de Peças L6474PD
Descrição Electrónicos  easySPIN ??fully integrated microstepping motor driver
PDF  51 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6474PD Folha de dados(HTML) 29 Page - STMicroelectronics

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L6474
Phase current control
Doc ID 022529 Rev 2
29/51
Figure 12.
Fast decay tuning during the falling steps
7.4
Torque regulation (output current amplitude regulation)
The output current amplitude can be regulated in two ways: writing the TVAL register or
varying the ADCIN voltage value.
The EN_TQREG bit (CONFIG register) sets the torque regulation method. If this bit is high,
ADC_OUT prevalue is used to regulate output current amplitude (see paragraph 9.1.8).
Otherwise the internal analog to digital converter is at the user’s disposal and the output
current amplitude is managed by the TVAL register (see paragraph 9.1.4).
The voltage applied to the ADCIN pin is sampled at fS frequency and converted in an NADC
bit digital signal. The analog to digital conversion result is available in the ADC_OUT
register.



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