PRM48BY480X500A00 Datasheet, PDF (18/44 Pages) Vicor Corporation – High Efficiency Converter

PRM48By480x500A00
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
t_OFF expired
ENABLE: 90uA to HIGH
Powertrain Stopped
Fault
Auto-
recovery
STARTUP SEQUENCE
ENABLE rising edge
t_ON 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
ENABLE falling edge,
Output OVP,
or OTP detected
Input OVLO or UVLO,
Output UVP,
or UTP detected
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
SUSTAINED
OPERATION
ENABLE: 1.8mA to HIGH
Powertrain Active
PRM^TM Regulator
Page 18 of 44
Rev 1.4
11/2015
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