BCM380x475y1K2A3z
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted;
Boldface
specifications apply over the temperature range of -40°C
≤
T
INTERNAL
≤
125°C (T-Grade); All other specifications are at T
INTERNAL
= 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
General Powetrain PRIMARY to SECONDARY Specification (Forward Direction) Cont.
Effective Primary Capacitance
(Internal)
Effective Secondary Capacitance
(Internal)
Effective Secondary Output
Capacitance (External)
Effective Secondary Output
Capacitance (External)
C
PRI_INT
C
SEC_INT
C
SEC_OUT_EXT
C
SEC_OUT_AEXT
Effective Value at 380 V
PRI_DC
Effective Value at 47.5 V
SEC_DC
Excessive capacitance may drive module into SC
protection
C
SEC_OUT_AEXT
Max = N * 0.5 * C
SEC_OUT_EXT MAX
, where
N = the number of units in parallel
Startup into a persistent fault condition. Non-Latching
fault detection given V
PRI_DC
> V
PRI_UVLO+
0.37
25.6
100
µF
µF
µF
Protection PRIMARY to SECONDARY (Forward Direction)
Auto Restart Time
Primary Overvoltage Lockout
Threshold
Primary Overvoltage Recovery
Threshold
Primary Overvoltage Lockout
Hysteresis
Primary Overvoltage Lockout
Response Time
Primary Undervoltage Lockout
Threshold
Primary Undervoltage Recovery
Threshold
Primary Undervoltage Lockout
Hysteresis
Primary Undervoltage Lockout
Response Time
Primary Undervoltage Startup Delay
t
AUTO_RESTART
V
PRI_OVLO+
V
PRI_OVLO-
V
PRI_OVLO_HYST
t
PRI_OVLO
V
PRI_UVLO-
V
PRI_UVLO+
V
PRI_UVLO_HYST
t
PRI_UVLO
From V
PRI_DC
= V
PRI_UVLO+
to powertrain active, EN
floating, (i.e One time Startup delay form application
of V
PRI_DC
to V
SEC_DC
)
From powertrain active. Fast Current limit protection
disabled during Soft-Start
28
Effective internal RC filter
45
1
Temperature sensor located inside controller IC
125
105
Temperature sensor located inside controller IC;
Protection not available for M-Grade units.
Startup into a persistent fault condition. Non-Latching
fault detection given V
PRI_DC
> V
PRI_UVLO+
110
115
-45
3
220
230
292.5
420
405
434.5
424
10.5
100
235
245
10
100
250
260
357.5
450
440
ms
V
V
V
µs
V
V
V
µs
t
PRI_UVLO+_DELAY
20
ms
Primary Soft-Start Time
Secondary Output Overcurrent Trip
Threshold
Secondary Output Overcurrent
Response Time Constant
Secondary Output Short Circuit
Protection Trip Threshold
Secondary Output Short Circuit
Protection Response Time
Overtemperature Shutdown
Threshold
Overtemperature Recovery
Threshold
Undertemperature Shutdown
Threshold
Undertemperature Restart Time
t
PRI_SOFT-START
I
SEC_OUT_OCP
t
SEC_OUT_OCP
I
SEC_OUT_SCP
t
SEC_OUT_SCP
t
OTP+
t
OTP–
t
UTP
t
UTP_RESTART
1
37
3.2
50
ms
A
ms
A
µs
°C
°C
°C
s
BCM
®
Bus Converter
Page 6 of 25
Rev 1.7
07/2015
vicorpower.com
800 927.9474
VICOR [ VICOR CORPORATION ]
