PRM48JH480T250A00 Datasheet, PDF (9/44 Pages) Vicor Corporation – High Efficiency Converter

PRM48JH480x250A00
Line Dropout Characteristics
Specifications apply during a line dropout condition V_IN from 30.0 V to 38.0 V , and trim from 20 V to 55 V, unless otherwise noted;
Boldface specifications apply over the temperature range of -40 ºC < T_INT < 125ºC (T-grade).
Line Dropout Specifications
• After startup if V_IN drops below V_{IN_DROPOUT_EN-}, a 200 msec line dropout timer is enabled
• Operation is sustained down to 30.0 V with specified derating for duration of timer
• Line dropout timer is disabled and normal operation resumes when V_IN recovers above V_{IN_DROPOUT_DIS+}
• Powertrain shutdown is initiated if V_IN does not recover to above V_{IN_DROPOUT_DIS+} before the timer expires or if Vin falls below V_{IN_UVLO-_SUPV}
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Line Dropout Timer
Enable Threshold
V_{IN_DROPOUT_EN-}
Line dropout timer activated when input voltage
drops below this level
37.0
38.0
Line Dropout Timer
Disable Threshold
V_{IN_DROPOUT_DIS+}
Line dropout timer disabled when input voltage
recovers above this level
38.0
39.0
Line Dropout Timer Duration
Line Dropout Minimum
Operating Voltage
t_DROPOUT
V_{IN_DROPOUT_MIN}
Powertrain shutdown after timer expires
Minimum input voltage for sustained operation
190
200
30.0
Line Dropout Current Rating
%I_DROPOUT
Percentage of rated current, linearly derated to 75%
between 38.0 V and 30.0 V, see Figure 41
-18.75 + 3.13 x V_IN
Line Dropout Power Rating
%P_DROPOUT
Percentage of rated current, linearly derated to 75%
between 38.0 V and 30.0 V, see Figure 41
-18.75 + 3.13 x V_IN
Unit
V
V
ms
V
%
%
PRM^TM Regulator
Page 9 of 44
Rev 1.2
11/2015
vicorpower.com
800 927.9474