Voltage Transformation Module

VT048A040T050FP

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

80

100

120

140

160

180

200

220

0

5

10

15

20

25

30

35

40

45

50

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

2.17

4.58

Vdc

No load

1.99

4.42

Vdc

Full load

Rated DC current

0

50

Adc

Peak repetitive current

75

A

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

baseline power 50%

Short circuit protection set point

52.5

Adc

Module will shut down

Current share accuracy

5

10

%

See Parallel Operation on Page 7

Efficiency

Half load

93.8

94.8

%

See Figure 3

Full load

93.5

94.5

%

See Figure 3

Internal output inductance

1.1

nH

Internal output capacitance

255

µF

Effective value

Output overvoltage setpoint

4.6

Vdc

Module will shut down

Output ripple voltage

No external bypass

216

305

mVp-p

See Figures 2 and 5

47 µF bypass capacitor

8

mVp-p

See Figure 6

Effective switching frequency

2.40

2.55

2.70

MHz

Fixed, 1.3 MHz per phase

Line regulation

K

0.0825

1/12

0.0842

Load regulation

2.8

3.6

mΩ

See Figure 13

Transient response

Voltage overshoot

110

mV

Response time

200

ns

See Figures 7 and 8

Recovery time

1

µs

See Figures 7 and 8