PRM48JH480T250A00 Datasheet, PDF (18/44 Pages) Vicor Corporation – High Efficiency Converter

PRM48JH480x250A00
High Level Functional State Diagram
Conditions that cause state transitions are shown along arrows. Sub-sequence activities listed inside the state bubbles.
Application of
Vin
V_IN > UVLO+
STANDBY SEQUENCE
ENABLE: 10uA to LOW
tOFF expired
ENABLE: 90uA to HIGH
Powertrain Stopped
Fault
Auto-
recovery
ENABLE rising edge
ENABLE falling edge,
Output OVP,
or OTP detected
Input OVLO or UVLO,
Output UVP,
or UTP detected
STARTUP SEQUENCE
tON expired
ENABLE: 1.8mA to HIGH
VC Pulse
REF_EN active
Adaptive loop and trim modes latched
RS mode latched at first ENABLE
after Vin applied only
Powertrain Active
t_{STARTUP_SEQ}
expired
FAULT SEQUENCE
ENABLE pulsed: 25mA to
LOW
Powertrain Stopped
ENABLE falling edge,
Output OVP or
OTP detected
Input OVLO or UVLO,
Output UVP,
or UTP detected
Short Circuit detected
V_IN < V_{IN_DROPOUT_EN-}
SUSTAINED
OPERATION
ENABLE: 1.8mA to HIGH
Powertrain Active
t_DROPOUT expired or
V_IN ≤ V_{IN_UVLO-_SUPV}
LINE DROP-OUT
OPERATION
Powertrain Active
Derated Power
and Current
tDROPOUT timer enabled
t < t_DROPOUT and
V_IN > V_{IN_DROPOUT_DIS+}
PRM^TM Regulator
Page 18 of 44
Rev 1.2
11/2015
vicorpower.com
800 927.9474