Rev 3.1

vicorpower.com

Page 10 of 13

06/2015

800 927.9474

EN1xxx

Output Voltage

40

45

50

55

60

65

70

75

80

50

30

15

5

2

Figure 17 — Converter ripple rejection vs. output voltage (typical)

Operating Power (W)

0

5

10

15

20

25

30

500

250

*

2,200

μF

1,600

μF

1,300

μF

*

1,100

μF

820

μF

680

μF

Figure 16 — Ripple voltage vs. operating power and bus

capacitance, series combination of C1, C2 (see Figure 1a)

Figure 15 — Hold-up time

APPLICATION NOTE (CONT.)

205 V

190 V

Power Fail

Power Fail

Warning

Bus OK

Converter

Shut down

Hold-up Time

254 V

Ride-Through Time

Ripple (V p-p)

π – θθ