BCM400P500T1K8A31 Datasheet, PDF (9/23 Pages) Vicor Corporation – Fixed Ratio DC-DC Converter

BCM400y500x1K8A31
Signal Characteristics
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.
UART SER-IN / SER-OUT Pins
• Universal Asynchronous Receiver/Transmitter (UART) pins.
• The BCM communication version is not intended to be used without a Digital Supervisor.
• Isolated I²C communication and telemetry is available when using Vicor Digital Isolator and Vicor Digital Supervisor. Please see specific product data sheet
for more details.
• UART SER-IN pin is internally pulled high using a 1.5 kΩ to 3.3 V.
SIGNAL TYPE
GENERAL I/O
DIGITAL
INPUT
STATE
Regular
Operation
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
Baud Rate
SER-IN Pin
SER-IN Input Voltage Range
BR_UART Rate
V_{SER-IN_IH}
V_{SER-IN_IL}
SER-IN rise time
t_{SER-IN_RISE} 10% to 90%
SER-IN fall time
t_{SER-IN_FALL} 10% to 90%
SER-IN R_PULLUP
R_{SER-IN_PLP} Pull up to 3.3 V
SER-IN External Capacitance
SER-OUT Pin
C_{SER-IN_EXT}
MIN TYP MAX UNIT
750
Kbit/s
2.3
V
1
V
400
ns
25
ns
1.5
kΩ
400 pF
DIGITAL
OUTPUT
SER-OUT Output Voltage
Range
V_{SER-OUT_OH} 0 mA ≥ I_OH ≥ -4 mA
V_{SER-OUT_OL} 0 mA ≤ I_OL ≤ 4 mA
SER-OUT rise time
SER-OUT fall time
SER-OUT source current
SER-OUT output impedance
t_{SER-OUT_RISE} 10% to 90%
t_{SER-OUT_FALL} 10% to 90%
I_SER-OUT
V_SER-OUT = 2.8 V
Z_SER-OUT
2.8
V
0.5 V
55
ns
45
ns
6 mA
120
Ω
Enable / Disable Control
• The EN pin is a standard analog I/O configured as an input to an internal µC.
• It is internally pulled high to 3.3 V.
• When held low the BCM internal bias will be disabled and the powertrain will be inactive.
• In an array of BCMs, EN pins should be interconnected to synchronize startup and permit startup into full load conditions.
• Enable / disable command will have no effect if the EN pin is disabled.
SIGNAL TYPE
ANALOG
INPUT
STATE
Startup
Regular
Operation
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN
EN to Powertrain active time
t_{EN_START}
V_IN > V_{IN_UVLO+},
EN held low both conditions satisfied
for t > t_{UVLO+_DELAY}
EN Voltage Threshold
V_ENABLE
2.3
EN Resistance (Internal)
R_{EN_INT} Internal pull up resistor
EN Disable Threshold
V_{EN_DISABLE_TH}
TYP MAX UNIT
250
µs
V
1.5
kΩ
1
V
BCM^® Bus Converter
Page 9 of 23
Rev 1.3
05/2015
vicorpower.com
800 927.9474