VICOR V300B48C250B User Manual

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Parameter Rating Unit Notes

+In to –In voltage -0.5 to +375 Vdc
+In to –In voltage 400 Vdc <100ms
PC to –In voltage -0.5 to +7.0 Vdc
PR to –In voltage -0.5 to +7.0 Vdc
+Out to –Out voltage -0.5 to +62.9 Vdc
+Sense to –Out voltage -0.5 to +62.9 Vdc
–Sense to –Out voltage 1.0 Vdc
SC to –Out voltage -0.5 to +1.5 Vdc
Isolation voltage (in to out) 3000 Vrms
Isolation voltage (in to base) 1550 Vrms
Isolation voltage (out to base) 500 Vrms
Storage temperature (C–Grade) -40 to +125 °C
Operating temperature (C–Grade) -20 to +100 °C Baseplate
Pin soldering temperature 500 (260) °F (°C) <5 sec; wav e solder
Pin soldering temperature 750 (390) °F (°C) <7 sec; hand solder
Mounting torque 5 (0.57) in-lbs (N-m) 6 each, # 4-40 or M3

Shown actual size:

2.28 x 2.2 x 0.5 in

57,9 x 55,9 x 12,7 mm

45

Absolute Maximum Ratings

Parameter Min Typ Max Unit

Baseplate to sink; flat, greased surface 0.16 °C/Watt
Baseplate to sink; thermal pad (P/N 20264) 0.14 °C/Watt
Baseplate to ambient 8.0 °C/Watt
Baseplate to ambient; 1000 LFM 1.9 °C/Watt
Thermal capacity 83 Watt-sec/°C

Thermal Resistance and Capacity

300Vin / 48Vout / 250Watts

DC-DC Converter Module

Model Number V300B48C250B

*

Features

• DC input range: 180 - 375V

• Input surge withstand: 400V for 100ms

• DC output: 48V

• Programmable output: 10 to 110%

• Regulation: ±0.4%

• Efficiency: 88%

• Maximum operating temperature:

100°C at full load

• Power density: 100W/cubic inch

• Height above board: 0.43 in. (10,9 mm)

• Parallelable, with N+M fault tolerance

• Low noise ZCS/ZVS architecture

T ypical Applications: off-line systems,
distributed power and electric vehicles

Product Overview

This DC-DC converter module uses
2nd Generation power processing, control
and packaging technologies to provide the
performance, flexibility and cost effectiveness
expected of a mature power component.
For example, a plated-cavity core transformer
couples widely separated primary and
secondary windings, resulting in low in-to­out parasitic capacitance and noise.
High frequency ZCS/ZVS switching,
advanced power semiconductor packaging
and thermal management provide high
power density with low temperature
gradients. Extensive use of silicon
integration results in 1/3 the part count
of a 1st Generation converter.

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Part Numbering

For pin styles see page 6. Slotted baseplate
(style 1) requires no designator. For
threaded baseplate add a “2” to the end of
the part number. For thru-hole, add a “3”.

See page 7 for dimensions.

See part numbering chart on this
page for other product grades.

V 300 B 15 C 250 B

Input Voltage

24= 24Vin

48= 48Vin
300= 300Vin
375= 375Vin

A = Maxi

B = Mini

C = Micro

Output

Voltage

Product Grade Temperatures (°C)

Grade Storage Operating

C = -40 to +125-20 to +100

T = -40 to +125-40 to +100
H = -55 to +125-40 to +100
M = -65 to +125-55 to +100

Pin

Style

Base-

plate

Output

Power

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Parameter Min Typ Max Unit Notes

Operating input voltage 180 300 375 Vdc
Input surge withstand 400 Vdc <100ms
Output voltage setpoint 47.52 48 48.48 Vdc Nominal input; full load; 25°C
Output OVP setpoint 53.7 55.7 57.7 Vdc 25°C; recycle input voltage to restart ( 1 minute off )
Output power 250 Watts At 100°C baseplate temperature
Efficiency 86 88 % Nominal input; 75% of full load;25°C

Parameter Min Typ Max Unit Notes

Line regulation ±0.02 ±0.3 % Low line to high line; full load
Load regulation ±0.06 ±0.4 % No load to full load;nominal input
Temperature regulation ±0.002 ±0.005 % / °C Over operating temperature range
Ripple and noise, p-p 100 125 mV Nominal input; full load; 20 MHz bandwidth
Current limit 5.31 5.99 6.78 Amps Output voltage 95% of nominal
Short circuit current .68 5.99 6.78 Amps Output voltage <250mV
Power sharing accuracy ±2 ±5 % 10 to 100% of full load

Programming range 10 110 %

Of nominal output voltage.For trimming below 90%
of nominal, a minimum load of 10% of maximum
rated power may be required.

Parameter Min Typ Max Unit Notes

Undervoltage turn-on 174.6 178.2 Vdc
Undervoltage turn-off 147.4 152.8 Vdc
Overvoltage turn-off/on Not included
Dissipation, standby 4.2 6.3 Watts No load

MODULE OPERATING SPECIFICATIONS

MODULE INPUT SPECIFICATIONS

MODULE OUTPUT SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and baseplate temperature,
unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate.

Baseplate Slotted (Style 1)

Slotted baseplate (style 1) requires no designator.
For threaded baseplate add a "2" to the end of the
part number. For thru-hole add a "3".

Pin style Short (Style 1)

For long pin configuration add “L”to the end of the
part number.

See page 7 for pin dimensions.

MODULE MECHANICAL SPECIFICATIONS

Note: For important information relative to applications where the converter modules are subject to continuous dynamic loading,

contact Vicor applications engineering at 800-927-9474.

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Parameter Min Typ Max Unit Notes

PRIMARY SIDE

(PC = Primary Control; PR = Parallel)

PC bias voltage 5.50 5.75 6.10 Vdc PC current = 1.0 mA

current limit 1.5 2.1 3.0 mA PC voltage = 5.5V
PC module disable 2.3 2.6 2.9 Vdc Must be able to sink ≥4 mA. See Fig. 1
PC module enable delay 4 7 ms
PC module alarm 0.5 Vavg UV, OV, OT, module fault.See Figs. 2 and 4
PR emitter amplitude 5.7 5.9 6.1 Volts PR load >30 ohms, < 30 pF
PR emitter current 150 mA
PR receiver impedance 375 500 625 ohms 25°C
PR receiver threshold 2.4 2.5 2.6 Volts Minimum pulse width: 20ns
PR drive capability 12 modules Without PR buffer amplifier

SECONDARY SIDE (SC = Secondary Control)

SC bandgap voltage 1.21 1.23 1.25 Vdc Referenced to –Sense
SC resistance 990 1000 1010 ohms
SC capacitance 0.033 µF
SC module alarm 0 Vdc With open trim; referenced to –Sense. See Fig. 6

Parameter Min Typ Max Unit Notes

Remote sense (total drop) 0.5 Vdc 0.25V per leg (senses must be closed)
Isolation voltage (in to out) 3000 Vrms Complies with reinforced insulation requirements
Isolation voltage (in to base) 1550 Vrms Complies with basic insulation requirements
Isolation voltage (out to base) 500 Vrms Complies with operational insulation requirements

Isolation resistance (in to out) 10 megohms
Weight 3.7 (104) 4 (112) ounces (grams)
Temperature limiting 100 115 °C See Figs.2 and 4

Agency approvals cULus, TÜV, CE

UL60950, EN60950, CSA60950, IEC 60950.
With a fuse in series with the +Input

MODULE CONTROL SPECIFICATIONS

MODULE GENERAL SPECIFICATIONS

ELECTRICAL CHARACTERISTICS, continued