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L6208PD データシート(PDF) 15 Page - STMicroelectronics

部品番号 L6208PD
部品情報  DMOS driver for bipolar stepper motor
PDF  35 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6208PD データシート(HTML) 15 Page - STMicroelectronics

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DocID7514 Rev 2
15/35
L6208
PWM current control
35
Figure 13. Output current regulation waveforms
Figure 14 shows the magnitude of the Off time tOFF versus COFF and ROFF values. It can be
approximately calculated from the equations:
Equation 1
tRCFALL = 0.6 · ROFF · COFF
tOFF = tRCFALL + tDT = 0.6 · ROFF · COFF + tDT
where ROFF and COFF are the external component values and tDT is the internally generated
deadtime with:
Equation 2
20 K
  ROFF  100 K
0.47 nF
 COFF  100 nF
tDT = 1 µs (typical value)



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