BCM380y475x1K2A30
BCM Logic Diagram
V
IN Applied
V
µC_ACTIVE < VIN < VIN_UVLO+
Pin status:
• TM Low
• EN High
• VAUX Low
Powertrain Inactive
True for time > tUVLO+_DELAY
:
VIN > VIN_UVLO+
EN (Floaꢀng or Driven high)
tUVLO+_DELAY
(2 0msTyp)
• VIN_UVLO < VIN < VIN_OVLO
• EN (Held Low at startup)
Pin status:
• TM PWM
• EN High
tEN_START
(250µsTyp)
• VAUX Low
Powertrain Inactive
SCP,
Startup Load: (IIN + COUT_EXT) > Startup SOA
EN (Floating or Driven high)
VIN_UVLO < VIN < VIN_OVLO
tSOFT_START
tAUTO_RESTART
t > tENABLE_OFF
(1 msTyp)
(2 92.5msMin)
VIN_UVLO < VIN < VIN_OVLO
tUTP_RESTART
OTP, OCP,
SCP, OVLO,
UVLO
Pin status:
• TM Low
(3 sTyp)
EN (Held Low)
• EN Low
• VAUX Low
UTP
Pin status:
Pin status:
• TM Low
Powertrain Inactive
• TM PWM
OTP, UTP, OCP,
SCP, OVLO, UVLO
• EN High
• EN High
• VAUX Low
• VAUX High
Condition: tVAUX (2msTyp)
Powertrain Inactive
Powertrain Active
EN (Held Low)
BCM® Bus Converter
Page 11 of 24
Rev 1.0
12/2013
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