BCM400X500Y1K8A3Z Datasheet, PDF (13/25 Pages) Vicor Corporation – Fixed Ratio DC-DC Converter

BCM400x500y1K8A3z
High Level Functional State Diagram
Conditions that cause state transitions are shown along arrows. Sub-sequence activities listed inside the state bubbles.
Application
of input voltage to V_{PRI_DC}
V < V < V _{μC_ACTIVE}
PRI_DC
PRI_UVLO+
STANDBY SEQUENCE
TM Low
EN High
VAUX Low
Powertrain Stopped
Fault
Auto-
recovery
V > V _{PRI_DC}
PRI_UVLO+
STARTUP SEQUENCE
TM Low
EN High
VAUX Low
ENABLE falling edge,
or OTP detected
Powertrain Stopped
Input OVLO or UVLO,
Output OCP,
or UTP detected
t_{PRI_UVLO+_DELAY}
expired
ONE TIME DELAY
INITIAL STARTUP
FAULT
SEQUENCE
TM Low
EN High
VAUX Low
Powertrain Stopped
ENABLE falling edge,
or OTP detected
Input OVLO or UVLO,
Output OCP,
or UTP detected
Short Circuit detected
SUSTAINED
OPERATION
TM PWM
EN High
VAUX High
Powertrain Active
BCM^® Bus Converter
Page 13 of 25
Rev 1.4
07/2015
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