Data Sheet
November 2, 2010
KNW013-020 Series Power Modules:
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
Characteristic Curves
The following figures provide typical characteristics for the KNW020A0F (3.3V, 20A) at 25
O
C
. The figures are
identical for either positive or negative remote On/Off logic.
95
20
OUTPUT CURRENT, Io (A)
90
EFFICIENCY,
(%)
15
NC
85
80
75
70
0
5
10
15
Vin=36V
Vin=48
Vin=75V
10
5
0
20
30
40
0.5 m/s
100 LFM
1.0 m/s
200 LFM
2.0 m/s
400 LFM
20
50
60
70
O
80
90
OUTPUT CURRENT, I
O
(A)
AMBIENT TEMPERATURE, T
A
C
Figure 7. Converter Efficiency versus Output Current.
Figure 10. Derating Output Current versus Local
Ambient Temperature and Airflow.
OUTPUT VOLTAGE On/Off VOLTAGE
V
On/off
(V) (2V/div)
V
O
(V) (1V/div)
OUTPUT VOLTAGE
V
O
(V) (20mV/div)
TIME, t (1s/div)
TIME, t (5ms/div)
Figure 8. Typical output ripple and noise (V
IN
= V
IN,NOM
,
I
o
= I
o,max
).
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (100mV/div)
Figure 11. Typical Start-up Using Remote On/Off,
negative logic version shown (V
IN
= V
IN,NOM
, I
o
= I
o,max
).
INPUT VOLTAGE
OUTPUT VOLTAGE
TIME, t (200
s
/div)
Io (A) (5A/div)
V
O
(V) (1V/div)
V
IN
(V) (20V/div)
TIME, t (5ms/div)
Figure 9. Transient Response to Dynamic Load
Change, 0.1A/µS, from 75% to 50% to 75% of full load.
Figure 12. Typical Start-up Using Input Voltage (V
IN
=
V
IN,NOM
, I
o
= I
o,max
).
LINEAGE
POWER
6
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
