Voltage Transformation Module

VT048A020T080FP

vicorpower.com

Rev. 1.1

Page 3 of 11

SPECIFICATIONS (CONT.)

WAVEFORMS

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

Ripple vs. Output Current

0

10

20

30

40

50

60

0

1020

30

4050

6070

80

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

1.09

2.29

Vdc

No load

0.970

2.18

Vdc

Full load

Rated DC current

0

80.0

Adc

Peak repetitive current

120.0

A

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

baseline power 50%

Short circuit protection set point

104

Adc

Module will shut down

Current share accuracy

5

10

%

See Parallel Operation on Page 7

Efficiency

Half load

91.5

91.4

%

See Figure 3

Full load

91.3

91.2

%

See Figure 3

Internal output inductance

0.8

nH

Internal output capacitance

306

µF

Effective value

Output overvoltage setpoint

2.3

Vdc

Module will shut down

Output ripple voltage

No external bypass

55

150

mVp-p

See Figures 2 and 5

100 µF bypass capacitor

2

mVp-p

See Figure 6

Effective switching frequency

2.5

2.7

2.8

MHz

Fixed, 1.3 MHz per phase

Line regulation

K

0.0413

1/24

0.0421

Load regulation

1.3

1.5

mΩ

See Figure 13

Transient response

Voltage overshoot

20

mV

Response time

200

ns

See Figures 7 and 8

Recovery time

1

µs

See Figures 7 and 8