Instruction Manual

Design Guide & Applications Manual
F
or Maxi, Mini, Micro Family DC-DC Converters and Configurable Power Supplies
Maxi, Mini, Micro Design Guide Rev 4.9 vicorpower.com
Page 47 of 88
Apps. Eng. 800 927.9474 800 735.6200
9. Modular AC Front-end System (ENMod)
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 – θ θ
Operating Power (W)
0
5
10
1
5
20
25
3
0
35
40
500
250
*
Power Fail Warning Time (ms)
2,200 µF1,600 µF1,300 µF
*
1,100 µF
8
20 µF
6
80 µF
Figure 9–13 — General timing diagram of bus voltage following interruption of the AC mains
Figure 9–14 — Power fail warning time vs. operating power and
total bus capacitance, series combination of C1, C1 (Figure 9–1a)
Operating Power (W)
Ride-through Time (ms)
0
10
20
30
40
5
0
60
70
80
90
1
00
9
0 Vac 115 Vac
500
250
Figure 9–15 — Ride-through time vs. operating power
Operating Power (W)
P-P Ripple Voltage (Vac)
0
5
10
15
20
25
30
500250
*
2,200 µF1,600 µF1,300 µF
*
1,100 µF
820 µF
680 µF
Output Voltage
Ripple Rejection (dB)
40
45
50
55
60
65
70
75
80
50301552
Figure 9–16 — Ripple voltage vs. operating power and bus capaci-
tance, series combination of C1, C1 (Figure 9–1a)
Figure 9–17 — Converter ripple rejection vs. output voltage (Typical)