Data Sheet
July 27, 2009
JNW350R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 28Vdc Output; 350W Output
Characteristic Curves
The following figures provide typical characteristics for the JNW350R (28V, 18A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
On/Off VOLTAGE OUTPUTVOLTAGE
V
O
(V) (10V/div)
V
ON/OFF
(V) (2V/div)
94
92
EFFICIENCY (%)
90
88
Vin=48V
86
84
82
0
2.5
5
7.5
10
12.5
OUTPUT CURRENT, I
o
(A)
Vin=36V
Vin=75V
TIME, t (20ms/div)
Figure 1. Converter Efficiency versus Output
Current.
Figure 4. Typical Start-Up Using negative Remote
On/Off; C
o,ext
= 470µF.
INPUT VOLTAGE OUTPUT VOLTAGE
V
O
(V) (10V/div)
V
in
(V) (20V/div)
OUTPUT VOLTAGE
V
O
(V) (50mV/div)
TIME, t (1μs/div)
TIME, t (20ms/div)
Figure 2. Typical Output Ripple and Noise at Room
Temperature and 48Vin; I
o
= I
o,max
; C
o,ext
= 470µF.
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (200mV/div)
I
O
(A) (5A/div)
Figure 5. Typical Start-Up from V
IN
, on/off enabled
prior to V
IN
step; C
o,ext
= 470µF.
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (200mV/div)
I
O
(A) (5A/div)
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 3. Standard JNW350R Transient Response to
Dynamic Load Change from 25% to 50% to 25% of
Full Load at Room Temperature and 48 Vdc Input;
0.1A/uS, C
o,ext
= 470µF
Figure 6. Standard JNW350R Transient Response to
Dynamic Load Change from 50% to 75% to 50% of
Full Load at Room Temperature and 48 Vdc Input;
0.1A/uS, C
o,ext
= 470µF
LINEAGE
POWER
5
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
