Voltage Transformation Module

VT048A480T006FP

vicorpower.com

Rev. 1.0

Page 3 of 11

SPECIFICATIONS (CONT.)

WAVEFORMS

Figure 1 — Input reflected ripple current at full load and 48 Vf.

Ripple vs. Output Current

25

50

75

100

125

150

175

200

0

0.625 1.25 1.875 2.5

3.125 3.75 4.375

5

5.625 6.25

Output Current (A)

Figure 2 — Output voltage ripple vs. output current at 48 Vf with no POL

bypass capacitance.

Parameter

Min

Typ

Max

Unit

Note

Output voltage

26.0

55.0

Vdc

No load

24.7

53.8

Vdc

Full load

Rated DC current

0

6.3

Adc

Peak repetitive current

9.4

A

Max pulse width 1ms, max duty cycle 10%,

baseline power 50%

Short circuit protection set point

6.4

Adc

Module will shut down

Current share accuracy

5

10

%

See Parallel Operation on Page 7

Efficiency

Half load

96.0

96.7

%

See Figure 3

Full load

96.0

96.4

%

See Figure 3

Internal output inductance

6.0

nH

Internal output capacitance

6

µF

Effective value

Output overvoltage setpoint

55.0

Vdc

Module will shut down

Output ripple voltage

No external bypass

180

320

mVp-p

See Figures 2 and 5

9.4 µF bypass capacitor

20

mVp-p

See Figure 6

Effective switching frequency

3.2

3.3

3.50

MHz

Fixed, 1.7 MHz per phase

Line regulation

K

0.9900

1

1.0100

Load regulation

188

210

mΩ

See Figure 13

Transient response

Voltage overshoot

1.2

V

Response time

200

ns

See Figures 7 and 8

Recovery time

1

µs

See Figures 7 and 8