BCM6123XD1E5126YZZ Datasheet, PDF (14/30 Pages) Vicor Corporation – Isolated Fixed-Ratio DC-DC Converter

BCM6123xD1E5126yzz
PMBus™ Control 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 1.5kΩ to 3.3V.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN TYP MAX UNIT
GENERAL I/O
DIGITAL
INPUT
Regular
Operation
Baud Rate
SER-IN Pin
SER-IN Input Voltage Range
SER-IN rise time
SER-IN fall time
SER-IN R_PULLUP
SER-IN External Capacitance
SER-OUT Pin
BR_UART Rate
V_{SER-IN_IH}
V_{SER-IN_IL}
t_{SER-IN_RISE} 10% to 90%
t_{SER-IN_FALL} 10% to 90%
R_{SER-IN_PLP} Pull up to 3.3V
C_{SER-IN_EXT}
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} 0mA ≥ I_OH ≥ -4mA
V_{SER-OUT_OL} 0mA ≤ I_OL ≤ 4mA
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 = 2.8V
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 3.3V.
• 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.
• 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
EN Voltage Threshold
t_{EN_START}
V_ENABLE
V_{PRI_DC} > V_{PRI_UVLO+},
EN held low both conditions satisfied
for t > t_{PRI_UVLO+_DELAY­}
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 14 of 30
Rev 1.1
01/2017
vicorpower.com
800 927.9474