VICOR VI-200 Series, Design Manual & Applications Manual

Page: 41 / 100

Design Guide & Applications Manual
For VI-200 and VI-J00 Family DC-DC Converters and Configurable Power Supplies
VI-200 and VI-J00 Family Design Guide Rev 3.4 vicorpower.com
Page 40 of 97
Apps. Eng. 800 927.9474
800 735.6200
13. AC Input Harmonic Attenuator Module (HAM)
L
IN
E
L
O
A
D
R Cx
Cy
Cy
D1
D2
D3
HAM Filter P/N 30205
R = 235 K
Ω
D1,2 = 1.5KE130CA D3 = 1.5KE150CA
MOV
*
P/N 30076
Cx = 1.5 uF(x2)SH Cy = 0.01 uF, Y2 type LC = 6.9 mH LD = 0.72 mH
*MOV required external to filter to meet normal mode transient surge requirements
CM DM
Figure 13–10 — Recommended HAM filter
+OUT
P/OK
–OUT
E/O
A/S
18 k Ω , 1/4 W
"Power OK" Status
Low = OK
LOGIC
P/OK
–OUT
+OUT
E/O
S
G
D
A/S
Figure 13–6 — Auxiliary Supply (A/S) Figure 13–7 — Power OK (P/OK)
LOGIC
E/O
–OUT
+OUT
P/OK
A/S
S
G
D
Figure 13–8 — Enable Output (E/O)
Outputs
DC-DC Converter(s)
Rectified Line
Enable Output (E/O)
DC Output
of HAM
Power OK (P/OK)
AC Mains
120 Vrms
Boost Voltage
195 Vdc
240 Vdc
Off at 195 Vdc
Off at 230 Vdc
230 Vdc
25 ms
10 ms
Off below 195 Vdc
Figure 13–9 — Start-up / shut-down timing diagram
A/S
E/O
P/OK
+OUT
–OUT
IAS ≤ 3 mA
19 – 23 V
+
–
DO NOT OVERLOAD
or directly connect a capacitor
to the A/S terminal.
A line filter is required to provide attenuation of
conducted emissions generated by the HAM module and
to protect it from line transients. It also presents a well
defined high frequency AC line impedance to the input of
the HAM. To meet the listed specifications, Vicor’s P/N
30205 line filter/transient suppressor or equivalent must
be used (Figure 13–10). The addition of a MOV external
to this filter is required to meet normal mode transient
surge requirements.
For applications using HAMD + BAMD or where the user
desires to construct a custom HAM filter, the filter should
be designed following Figure 13–10, the schematic of
Vicor’s P/N 30205 filter. The current carrying capability of
the inductors must be scaled proportionally to the number
of HAM modules used. Inductance values must be
selected according to Table 13–1. These limits are to
ensure proper operation of the HAM and do not
guarantee a system will meet conducted emissions
specifications.
For applications requiring magnetic field shielding, do not
place a ferrous EMI shield over the plastic cover of the
HAM module. This can cause thermal problems due to
induction heating effects.
LINE FILTER FOR HIGH BOOST HAM
Parameter Min Typ Max Unit
Differential Mode
0.2 0.35 0.75 mH
Inductance (LD)
Common Mode
3 6 mH
Inductance (LC)
Table 13-1 — HAM filter inductance range