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Not Recommended for New Designs
Electrical Specifications (continued)
Auxiliary Pins (Conditions are at 48 Vin, 48 Vf, full load, and 25°C ambient unless otherwise specified)
V?I Chip Regulator
Parameter
Min
Typ
Max
Unit
Note
VC (VTM Control)
Pulse width
8
12
18
ms
Peak voltage
12
14
18
V
Referenced to –Out
PC (Primary Control)
DC voltage
Module disable voltage
Module enable voltage
4.8
2.3
5.0
2.4
2.5
5.2
2.6
Vdc
Vdc
Vdc
Referenced to –In
Referenced to –In
Disable hysteresis
100
mV
Source only after start up; not to be used for
Current limit
1.75
1.90
mA
aux. supply; 100 k Ω minimum load
impedance to assure start up
Enable delay time
Disable delay time
IL (Current Limit Adjust)
Voltage
100
1
1
μs
μs
V
Accuracy
± 15
%
Based on DC current limit set point
PR (Parallel Port)
Voltage
0.6
7.5
V
Referenced to SG; See description Page 8
Source current
External capacitance
VH (Auxiliary Voltage)
1
100
mA
pF
Typical internal bypass C= 0.1 μF
Range
8.7
9.0
9.3
Vdc
Maximum external C=0.1 μF, referenced to SG
Regulation
Current
SC (Secondary Control)
0.04
5
%/mA
mA p
Voltage
1.23
1.24
1.25
Vdc
Referenced to SG
Internal capacitance
External capacitance
OS (Output Set)
0.22
0.7
μF
μF
Set point accuracy
Reference offset
± 1.5
±4
%
mV
Includes 1% external resistor
CD (Compensation Device)
External resistance
20
Ω
Omit resistor for regulation at output of PRM
General Specs
Parameter
Min
Typ
Max
Unit
Note
MTBF
MIL-HDBK-217F
2.2
Mhrs 25°C, GB
Agency approvals
Mechanical parameters
cTüVus UL/CSA 60950-1, EN60950-1
CE Marked for Low Voltage Directive and RoHS Recast Directive, as applicable
See Mechanical Drawings, Figures 19 – 22
Weight
Dimensions
Length
Width
Height
Thermal
0.53/15
1.28/32,5
0.87/22,0
0.265/6,73
oz / g
in /mm
in /mm
in /mm
Over temperature shutdown
130
135
140
°C
Junction temperature
Thermal capacity
Junction-to-case thermal impedance (R θ JC )
Junction-to-board thermal impedance (R θ JB )
9.3
1.1
2.1
Ws/°C
°C/W
°C/W
Case-to-ambient
3.7
°C/W
With 0.25” heat sink @ 300 LFM
vicorpower.com
800-735-6200
V?I Chip Regulator
P048F048T24AL
Rev. 3.9
Page 7 of 14
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