Maxim-integrated MAX15301 PMBus Command Set Manuel d'utilisateur Page 19

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 53
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 18
MAX15301 PMBus Command Set User’s Guide
Rev 1 Page 19 of 53
TOFF_FALL
Reference:
Lockable:
Yes
Command Code:
Format:
Linear
Data Bytes:
Units:
ms
Transfer:
Factory Value:
0xCA80 (see Description)
Description/Notes:
See Section 16.6 of the PMBus Specification Part II.
The TOFF_FALL command sets the ramp-down time from regulation at VOUT_COMMAND to 0V. The
nominal factory value is 5ms.
The MAX15301 achieves shutdown dV
OUT
/dt control by decrementing the loop setpoint by one 12-bit
step every time a certain number of ramp-controller clock cycles have elapsed in an 8-bit counter.
This results in a setpoint that decreases at a controlled rate, in turn creating a constant dV
OUT
/dt
during shutdown.
Because the MAX15301 must calculate the ramp co
ntrol timer setting based upon the value of
VOUT_COMMAND, the possible range and resolution of TOFF_FALL will vary significantly.
The desired value of TOFF_FALL is retained in memory, regardless of ramp-timer limitations, but the
read-back value is based on actual hardware register settings.
Vue de la page 18
1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 52 53

Commentaires sur ces manuels

Pas de commentaire