B048X080Y24A Datasheet, PDF (4/18 Pages) Vicor Corporation – Unregulated DC-DC Converter

Not Recommended for New Designs
B048x080y24A
3.0 SIGNAL CHARACTERISTICS
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature
range of -40°C < T_C < 125°C (T-Grade); All other specifications are at T_C = 25°C unless otherwise noted.
PRIMARY CONTROL : PC
• The PC pin enables and disables the BCM. When held low,
the BCM is disabled.
• In an array of BCM modules, PC pins should be interconnected
to synchronize start up and permit start up into full load conditions.
• PC pin outputs 5 V during normal operation. PC pin internal bias
level drops to 2.5 V during fault mode, provided V_IN remains
in the valid range.
SIGNAL TYPE
ANALOG
OUTPUT
STATE
Regular
Operation
Standby
Transition
Start Up
Start Up
Regular
Operation
ATTRIBUTE
PC voltage
PC available current
PC source (current)
PC resistance (internal)
PC capacitance (internal)
PC load resistance
PC time to start
PC enable threshold
SYMBOL
CONDITIONS / NOTES
V_PC
I_{PC_OP}
I_{PC_EN}
R_{PC_INT}
C_{PC_INT}
R_{PC_S}
T_ON1
Internal pull down resistor
Section 7
To permit regular operation
V_{PC_EN}
MIN TYP MAX UNIT
4.7 5.0 5.3 V
2.0 3.5 5.0 mA
50 100
µA
50 150 400 kΩ
1000 pF
60
kΩ
330 450 630 ms
2.0 2.5 3.0 V
DIGITAL
INPUT / OUPUT
Standby
Transition
PC disable duration
T_{PC_DIS_T} Minimum time before attempting re-enable 1
s
PC threshold hysteresis
V_{PC_HYSTER}
50
mV
PC enable to V_OUT time
T_ON2 V_IN = 48 V for at least T_ON1 ms
50 100 150 µs
PC disable to standby time
T_PC-DIS
4 10 µs
PC fault response time
T_{FR_PC} From fault to PC = 2 V
100
µs
TEMPERATURE MONITOR : TM
• The TM pin monitors the internal temperature of the controller IC
within an accuracy of ±5°C.
• Can be used as a "Power Good" flag to verify that
the BCM module is operating.
• Is used to drive the internal comparator for Overtemperature Shutdown.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN TYP MAX UNIT
ANALOG
OUTPUT
DIGITAL
OUTPUT
(FAULT FLAG)
Regular
Operation
Transition
Standby
TM voltage range
TM voltage reference
TM available current
TM gain
TM voltage ripple
TM capacitance (external)
TM fault response time
TM voltage
TM pull down (internal)
V_TM
V_{TM_AMB}
I_TM
A_TM
V_{TM_PP}
C_{TM_EXT}
T_{FR_TM}
V_{TM_DIS}
R_{TM_INT}
T_J controller = 27°C
C_TM = 0 pF, V_IN = 48 V, I_OUT = 30 A
From fault to TM = 1.5 V
Internal pull down resistor
2.12
4.04 V
2.95 3.00 3.05 V
100
µA
10
mV/°C
120 200 mV
50 pF
10
µs
0
V
25 40 50 kΩ
RESERVED : RSV
Reserved for factory use. No connection should be made to this pin.
BCM^® Bus Converter
Page 4 of 18
Rev 1.1
08/2014
vicorpower.com
800 927.9474