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MBCM270F450M270A00 - MBCM270T450M270A00
3.0 SIGNAL CHARACTERISTICS
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature
range of -55 °C < T C < 100°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 BCMs, PC pins should be interconnected to synchronize
start up and permit start up in to 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
STATE
Regular
Operation
ATTRIBUTE
PC voltage
PC available current
SYMBOL
V PC
I PC _ OP
CONDITIONS / NOTES
MIN
4.7
2.0
TYP
5.0
3.5
MAX UNIT
5.3
V
5.0
mA
ANALOG
OUTPUT
Standby
PC source (current)
PC resistance (internal)
I PC _ EN
R PC _ INT
Internal pull down resistor
50
50
100
150
400
μA
k Ω
Transition
Start Up
PC capacitance (internal)
PC load resistance
C PC _ INT
R PC _ S
Section 7
To permit regular operation
60
1000
pF
k Ω
Start Up
Regular
Operation
PC time to start
PC enable threshold
T ON 1
V PC _ EN
460
2.0
540
2.5
620
3.0
ms
V
DIGITAL
INPUT / OUPUT
Standby
PC disable duration
PC threshold hysteresis
T PC _ DIS _ T
V PC _ HYSTER
Minimum time before attempting re-enable
1
50
s
mV
Transition
PC enable to V OUT time
T ON2
V IN = 270 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 is operating.
? Is used to drive the internal compairator
for Over Temperature Shutdown.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN
TYP
MAX UNIT
TM voltage range
V TM
2.12
4.04
V
ANALOG
OUTPUT
Regular
Operation
TM voltage reference
TM available current
V TM _ AMB
I TM
T J controller = 27°C
2.95
100
3.00
3.05
V
μA
TM gain
A TM
10
mV/°C
TM voltage ripple
V TM _ PP
C TM = 0 pF, V IN = 270 V, I OUT = 6.25 A
120
200
mV
DIGITAL
OUTPUT
(FAULT FLAG)
Transition
Standby
TM capacitance (external)
TM fault response time
TM voltage
TM pull down (internal)
C TM _ EXT
T FR _ TM
V TM _ DIS
R TM _ INT
From fault to TM = 1.5 V
Internal pull down resistor
25
10
0
40
50
50
pF
μs
V
k Ω
RESERVED : RSV
Reserved for factory use. No connection should be made to this pin.
Rev. 1.1
V?I CHIP CORP. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200
1/2011
Page 4 of 19
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