BCM400P500T1K8A30 Datasheet, PDF (11/25 Pages) Vicor Corporation – Fixed Ratio DC-DC Converter

BCM400x500y1K8A3z
Signal Characteristics (Cont.)
Specifications apply over all line, 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.
Auxiliary Voltage Source
• The VAUX pin is a standard analog I/O configured as an output from an internal µC.
• 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.
• 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.
SIGNAL TYPE
STATE
Startup
ATTRIBUTE
Powertrain active to VAUX
time
SYMBOL
t_VAUX
CONDITIONS / NOTES
Powertrain active to VAUX High
MIN TYP MAX UNIT
2
ms
VAUX Voltage
V_VAUX
2.8
3.3 V
VAUX Available Current
I_VAUX
4 mA
ANALOG
OUTPUT
Regular
Operation
VAUX Voltage Ripple
VAUX Capacitance
(External)
V_{VAUX_PP}
C_{VAUX_EXT}
T_INTERNAL ≤ 100ºC
50
mV
100
0.01 µF
VAUX Resistance (External) R_{VAUX_EXT} V_{PRI_DC} < V_{µC_ACTIVE}
1.5
kΩ
Fault
VAUX Fault Response Time t_{VAUX_FR} From fault to V_VAUX = 2.8 V, C_VAUX = 0 pF
10
µs
BCM^® Bus Converter
Page 11 of 25
Rev 1.4
07/2015
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