CPD Series Data Sheet
200 – 250 Watt CompactPCI
®
DC-DC Converters
®
Table 4b: Output data for Vo3, Vo4
Output
Characteristics
V
o
Output voltage
Conditions
V
i nom
, 50%
I
o nom
min
11.88
Vo3
12 V
typ
12.0
2.5/4
1
V
i min
–
V
i max
T
C min
–
T
C max
5.5
7
I
o3
> 75%
I
o 4 2
V
i nom
,
I
o nom
BW = 20 MHz
C
ext
= 22
µF
+ 100 nF
V
i min
–
V
i max
,
I
o nom
V
i nom
, 50 – 100%
I
o max
±60
±120
0
± 200
500
±0.3
4
150
3
Droop
Vo4
–12
V
max
12.12
min
–11.52
typ
–12.0
0.5/1
1
2
3.5
no min. load required
mV
pp
120
±60
– 480
3
0
± 200
500
±0.5
4
200
150
200
µs
mV/K
ms
120
mV
max
–12.48
Unit
VDC
A
I
o nom
Nominal output current
I
o max
Max. output current
I
oL
I
o min
v
o
Output current limit
Minimum load
Output
voltage
noise
Switch. frequ.
Total
∆V
oV
Static line regulation
∆V
oL
v
o d
t
d
αV
o
t
h
t
s
1
Static load regulation
∆V
oS
Overshoot at switch on/off
Dynamic Voltage
Vo3:
∆I
o
= 2 A, dI
o
/dt = 2 A/µs
load
deviation
Vo4:
∆I
o
= 0.5 A, dI
o
/dt = 2 A/µs
regulation Recovery time
Temperature coefficient
of output voltage
Hold-up time
Start-up time
Values for CPD200/CPD250
T
C min
–
T
C max
0 –
I
o nom
,
V
i min
–
V
i max
starting at
V
i nom
,
I
o nom
V
i nom
,
I
o nom
2
Required
to maintain regulation of Vo4
characteristic for passive current sharing
Hold-up Time
For extended hold-up time, use external output capacitors
or decoupling diodes and input capacitors of adequate
size.
Formula for additional external input capacitor
2 •
P
o
• (t
h total
–
t
h
) • 100
C
i ext
= ––––––––––––––––––––
η
• (V
ti2
–
V
i min2
)
where as:
C
i ext
=
P
o
=
η
=
t
h total
=
t
h
=
V
i min
=
V
ti
=
Hot Swap
Hot swap is possible. Using the hot-swap capability, the
output voltages may deviate dynamically by max. 5%
during the plug-in / plug-out operations.
Output Protection and Current Limitation
The outputs are fully protected against continuous open
circuit (no load) and also against continuous short circuit.
0
I
o
All outputs have a constant current limitation with a
rectangular characteristic (see figure below). The total
current from the main power trains Vo1, Vo2 and Vo3 is
limited by
P
o max
. So there is a free choice of load
distribution between these outputs.
V
o
/V
o nom
1.0
0.95
I
o nom
I
o max
I
o L
05186a
external input capacitance [mF]
output power [W]
efficiency [%]
total hold-up time [ms]
hold-up time [ms]
minimum input voltage [V]
threshold level [V]
0.5
Fig. 2
Current limitation behavior of a CPD.
NOV 28, 2006 revised to JAN 29, 2007
Page 5 of 13
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