VKA75xS Rev C 3/2001
Page 3
NOTES:
(1) See Typical Performance Curves, page 3
(2) Continuous Mode
(3) See graphs for Efficiency vs. Output Load, V
IN
, T
CASE
(4) 3.3V Models Limited in Trim Down Range
(5) Consult Factory for Details
ORDERING INFORMATION
VKA75 xSzz-
Device Family
Indicates 75 Watt Regulated Unit
Model Number
Selected from Table of Electrical Characteristics
Where:
x = Input Voltage (L = 24VDC; M = 48VDC)
zz = Output Voltage (03=3.3V, 05=5V, etc.)
Lead Length
0.200" - No Number
0.145" - (6)
0.110" - (8)
Remote On-Off Logic:
Positive - No Number
Negative - (1)
TYPICAL PERFORMANCE CURVES
T
A
= +40°C, nominal input voltage, rated load, recommended external components applied, unless otherwise specified.
3.3V
5V
28V
24V
0
20
40
60
80
100
70
75
80
85
90
95
EFFICIENCY vs OUTPUT LOAD
E
Output Load (% of Rated)
15V
OUTPUT RIPPLE vs INPUT VOLTAGE
N
Vin (VDC)
1.50
1.25
1.00
0.75
0.50
Vin, min
12V
D
D
Ambient Temperature (°C)
POWER DERATING WITH NO HEATSINK
POWER DERATING WITH NO HEATSINK
Natural
Convection
0
10
25
50
75
100
400 LFM
Airflow
200 LFM
Airflow
12
D
2
4
6
8
Vin, typ
Vin, max
0
20
40
60
80
100
70
75
80
85
90
95
EFFICIENCY vs OUTPUT LOAD
E
Output Load (% of Rated)
C
-10
Vin, min
-5
TYP
+5
+10
50% Load
10% Load
EFFICIENCY vs INPUT VOLTAGE
Vin (VDC)
Vin, typ
Vin, max
EFFICIENCY vs TEMPERATURE
C
20% Load
-55
+25
+105
Tcase (°C)
-15
+65
+5
-5
-10
TYP
+10
100% Load
REFLECTED RIPPLE CURRENT
vs TEMPERAURE
-55
+25
+105
Tcase (°C)
+100
TYP
-100
C
-15
+65
-50
+50
OUTPUT RIPPLE vs TEMPERATURE
-55
+25
+105
Tcase (°C)
3.0
1.0
0.33
N
-15
+65
0.5
2.0
14
16
24V
28V
15V
25
50
75
100
0
0
2
4
6
8
10
12
14
16
18
20
22
400 LFM
200
LFM
Natural
Convection
Ambient Temperature (
°
C)