Voltage Transformation Module

VT048A080T030FP

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

10

30

50

70

90

110

130

150

0

3

6

9

12

15

18

21

24

27

30

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

4.34

9.16

Vdc

No load

4.04

8.89

Vdc

Full load

Rated DC current

0

30

Adc

Peak repetitive current

45.0

A

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

baseline power 50%

Short circuit protection set point

42

Adc

Module will shut down

Current share accuracy

5

10

%

See Parallel Operation on Page 7

Efficiency

Half load

95.2

96.0

%

See Figure 3

Full load

95.0

95.8

%

See Figure 3

Internal output inductance

1.6

nH

Internal output capacitance

48

µF

Effective value

Output overvoltage setpoint

9.3

Vdc

Module will shut down

Output ripple voltage

No external bypass

132

220

mVp-p

See Figures 2 and 5

30 µF bypass capacitor

17

mVp-p

See Figure 6

Effective switching frequency

3.10

3.20

3.30

MHz

Fixed, 1.6 MHz per phase

Line regulation

K

0.1650

1/6

0.1683

Load regulation

7.5

10.0

mΩ

See Figure 13

Transient response

Voltage overshoot

200

mV

Response time

200

ns

See Figures 7 and 8

Recovery time

1

µs

See Figures 7 and 8