BCM380y475x1K2A30
Signal Characteristics (Cont.)
Specifications apply over all line, 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.
Auxilary Voltage Source
• The VAUX pin is a standard analog I/O configured as an output
from an internal µC.
• VAUX can be used as a "Ready to process full power" flag. This pin
transitions VAUX voltage after a 2 ms delay from the start of powertrain
activating, signaling the end of softstart.
• VAUX can be used as "Fault flag". This pin is pulled low internally
when a fault protection is detected.
• VAUX is internally connected to µC output as internally pulled high to a
3.3 V regulator with 2% tolerance, a 1% resistor of 1.5 KΩ.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN
TYP
2
MAX UNIT
Start Up
Powertrain active to VAUX time
VAUX Voltage
tVAUX
VVAUX
IVAUX
Powertrain active to VAUX high
ms
2.8
3.3
4
V
VAUX Avaliable Current
mA
mV
mV
µF
ANALOG
OUTPUT
Regular
50
VAUX Voltage Ripple
VVAUX_PP
Operation
TINTERNAL ≤ 100ºC
100
VAUX Capacitance (External)
VAUX Resistance (External)
CVAUX_EXT
RVAUX_EXT
0.01
VIN < VµC_ACTIVE
1.5
kΩ
From fault detection to
VAUX = 2.8 V, CVAUX = 0 pF
Fault
VAUX Fault Response Time
tFR_TM
10
µs
BCM® Bus Converter
Page 9 of 24
Rev 1.0
12/2013
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