BCM6123xD1E5126yzz
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
-40°C ≤ TINTERNAL ≤ 125°C (T-Grade); All other specifications are at TINTERNAL = 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)
CPRI_INT
CSEC_INT
CSEC_OUT_EXT
CSEC_OUT_AEXT
Effective Value at 380VPRI_DC
Effective Value at 47.5VSEC_DC
0.37
25.6
µF
µF
µF
Effective Secondary Capacitance
(Internal)
Effective Secondary Output
Capacitance (External)
Excessive capacitance may drive module into SC
protection
100
Effective Secondary Output
Capacitance (External)
CSEC_OUT_AEXT Max = N * 0.5 * CSEC_OUT_EXT MAX, where
N = the number of units in parallel
Powertrain Protection PRIMARY to SECONDARY (Forward Direction)
Startup into a persistent fault condition. Non-Latching
fault detection given VPRI_DC > VPRI_UVLO+
Auto Restart Time
tAUTO_RESTART
VPRI_OVLO+
VPRI_OVLO-
292.5
357.5
450
ms
V
Primary Overvoltage Lockout
Threshold
420
405
434.5
424
10.5
100
1
Primary Overvoltage Recovery
Threshold
440
V
Primary Overvoltage Lockout
Hysteresis
VPRI_OVLO_HYST
tPRI_OVLO
V
Primary Overvoltage Lockout
Response Time
µs
ms
A
From powertrain active. Fast Current limit protection
disabled during Soft-Start
Primary Soft-Start Time
tPRI_SOFT-START
ISEC_OUT_OCP
tSEC_OUT_OCP
ISEC_OUT_SCP
tSEC_OUT_SCP
tOTP+
Secondary Output Overcurrent Trip
Threshold
28
45
37
50
Secondary Output Overcurrent
Response Time Constant
Effective internal RC filter
3.2
ms
A
Secondary Output Short Circuit
Protection Trip Threshold
Secondary Output Short Circuit
Protection Response Time
1
µs
°C
Overtemperature Shutdown
Threshold
Temperature sensor located inside controller IC
125
BCM® Bus Converter
Page 7 of 30
Rev 1.1
01/2017
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