Product Data Sheet
100 W
ATT
S
INGLE
O
UTPUT
H
IGH
D
ENSITY
DC/DC C
ONVERTER
TM
VKA100xS Series
DESCRIPTION
The VKA100xS Series DC/DC converters present an
economical and practical solution for distributed power
system architectures which require high power density
and efficiency while maintaining system modularity and
upgradeability. With the ability to operate over a wide
input voltage range of 18 to 36 and 33 to 75 volts, these
modules are ideal for use in battery backup applications
common in todays' telecommunication and electronic
data processing applications. The output is fully isolated
from the input, allowing for a variety of polarity and
grounding configurations.
The VKA100xS's proprietary control circuitry responds
to 50-100% load steps in 75mSeconds to within 1%
nominal Vout.
The patented fixed frequency architecture combined with
surface mount technology results in a compact, efficient
and reliable solution to DC/DC conversion requirements.
FEATURES
q
18 - 36V & 33 - 75V INPUT RANGE
q
SMALL SIZE: 2.28" X 2.4" X 0.50"
q
HIGH EFFICIENCY: 87% TYPICAL AT 5V
q
75µS TRANSIENT RESPONSE 50-100% LOAD STEP
µ
q
420kH
Z
FIXED-FREQUENCY OPERATION
q
OPERATION TO +100°C BASEPLATE TEMP.
q
PRIMARY REMOTE ON/OFF, CHOICE OF POS/NEG
LOGIC
q
ADJUSTABLE OUTPUT VOLTAGE
q
REMOTE SENSE
q
CONTINUOUS SHORT-CIRCUIT PROTECTION
q
THERMAL SHUTDOWN
q
SAFETY PER UL1950, EN 60950 AND CSA 22.2 #234
PENDING
q
CASE GROUND PIN
Efficiency(%)
Input
Model
VKA100LS03
VKA100LS05
VKA100LS12
VKA100LS15
VKA100LS24
VKA100LS28
(18-36)
24VDC
Efficiency(%)
Input
Model
VKA100MS03
VKA100MS05
VKA100MS12
VKA100MS15
VKA100MS24
VKA100MS28
(33-75)
48VDC
V
OUT
3.3V
5.0V
12.0V
15.0V
24.0V
28.0V
I
OUT
(A)
20.0
20.0
8.3
6.7
4.2
3.6
Note (1)
V
OUT
3.3V
5.0V
12.0V
15.0V
24.0V
28.0V
I
OUT
(A)
20.0
20.0
8.3
6.7
4.2
3.63
81
86
88
89
89
89
Note (1)
Voltage (VDC)
Min
80
85
87
88
89
89
Typ
81
86
88
89
90
90
Voltage (VDC)
Min
Typ
82
87
89
90
90
90
AGENCY APPROVALS PENDING
Internet: http://www.cdpowerelectronics.com
Power Electronics Division, United States
3400 E Britannia Drive, Tucson, Arizona 85706
Phone: 520.295.4100 Fax: 520.770.9369
VKA100xS RevA 7/98
Power Electronics Division, Europe
C&D Technologies (Power Electronics) Ltd.
132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland
Tel: +353.61.474.133
Fax:+353.61.474.141
Page 1
COMMON SPECIFICATIONS
Specifications typical at T
CASE
= +40°C, nominal input voltage, rated output current unless otherwise specified.
PARAMETER
INPUT
Voltage Range
VKA100LS
VKA100MS
Maximum Input Current
VKA100LS
VKA100MS
Reflected Ripple Current
Input Ripple Rejection
No Load Input Current LS/MS
Power Dissipation LS/MS
No Load
Standby, Primary On/Off Disabled LS/MS
Inrush Charge
VKA100LS
VKA100MS
Quiescent Operating Current
Primary On/Off Disabled
CONDITIONS
MIN
TYP
MAX
UNITS
18
33
V
IN
= 16VDC
V
IN
= 27VDC
Peak - Peak
DC to 1KHz
24
48
40
75
7.4
4.4
VDC
VDC
A
A
mA
dB
mA
W
W
50
20
60
50/100
3.6/4.8
0.18/0.4
V
IN
= V
IN
max.
0.520
0.360
8
12
mC
mC
mA
OUTPUT
Rated Power
Set point Accuracy
Line Regulation
Load Regulation
Output Temperature Drift
Output Ripple, p-p
Output Current Limit Inception
Output Short-Circuit Current (2)
Output Overvoltage Limit
0
High Line to Low Line
No Load to Rated Load
DC to 20MHz BW
test
3.3V Output
5V Output
12V, 15V, 24V and 28V
50 to 100% Load Step
di/dt = 75A/µSec
V
OUT
, 1% of Nominal Output
Peak Test for 2 Seconds
0.02
0.02
±.02
1%
100
1
0.05
0.05
4
125%
130%
110%
5
6.6
130%
7%
100
W
%
%
%
%/°C
V
OUT
, Nom
l
OUT
, Nom
l
OUT
, Nom
V
V
V
OUT
, Nom
V
OUT
, Nom
µSec
VDC
VDC
VDC
MΩ
pF
µA,
rms
Transient Response
Peak Deviation
Settling Time
ISOLATION
Input to Output
Input to Baseplate
Output to Baseplate
Resistance
Capacitance
Leakage Current
GENERAL
Efficiency, Line, Load, Temp. (3)
Switching Frequency
Remote Sense Compensation
Output Voltage Adjust Range (4)
Remote On/Off Control Inputs
Primary
Sink Current-Logic Low
Vlow
Vhigh0
Turn-on Time
Weight
TEMPERATURE
Operation/Specification
Storage
Shutdown Temperature
Thermal Impedance, case-ambient
Lead Solder Temperature
75
1500
1500
500
10
2000
180
V
ISO
= 240VAC, 60Hz
400
(See Note 3, Page 3)
420
-50% / +10%
440
0.5
KHz
V
V
OUT
, Nom
mA
V
V
mSec
g (oz.)
Open Collector/Drain
1.0
1
2
12.5
85 (3.0)
Within 1% of Rated Output
10.0
Case Temperature
Case Temperature
Case Temperature
10 Seconds max
-40
-55
+100
+25
+25
8.2
+100
+125
+115
+300
°C
°C
°C
°C/W
°C
( ) See NOTES on page 3.
Page 2
VKA100xs RevA 7/98
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
VKA100 xSzz-
Device Family
Indicates 100 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.
EFFICIENCY vs OUTPUT LOAD
95
95
28V
24V
15V
EFFICIENCY vs OUTPUT LOAD
EFFICIENCY vs TEMPERATURE
+10
90
12V
5V
90
Change in Efficiency (%)
Efficiency (%)
Efficiency (%)
85
3.3V
85
+5
80
80
15V
TYP
100% Load
20% Load
28V
75
75
24V
-5
70
0
20
40
60
80
Output Load (% of Rated)
100
70
0
-10
20
40
60
80
Output Load (% of Rated)
100
-55
-15
+25
Tcase (°C)
+65
+105
EFFICIENCY vs INPUT VOLTAGE
+10
1.50
OUTPUT RIPPLE vs INPUT VOLTAGE
3.0
OUTPUT RIPPLE vs TEMPERATURE
Normalized Output Ripple
+5
1.25
Normalized Output Ripple
Change in Efficiency (%)
2.0
TYP
100% Load
50% Load
1.00
1.0
-5
0.75
0.5
10% Load
-10
Vin, min
Vin, typ
Vin (VDC)
Vin, max
0.50
Vin, min
0.33
Vin, typ
Vin (VDC)
Vin, max
-55
-15
+25
Tcase (°C)
+65
+105
Change in Reflected Ripple Current (%)
+100
REFLECTED RIPPLE CURRENT
vs TEMPERAURE
T
POWER DERATING WITH NO HEATSINK
16
14
+50
12
TYP
10
200 LFM
Airflow
400 LFM
Airflow
Dissipated Power, P
D
(W)
-50
Natural
Convection
8
-100
-55
-15
+25
Tcase (°C)
+65
+105
6
4
2
0
25
50
75
100
Ambient Temperature (°C)
VKA100xS RevA 7/98
Page 3
MECHANICAL
NOTES:
All dimensions are in inches (millimeters).
PIN PLACEMENT TOLERANCE: ± 0.005"
0.530 MAX
[13.46]
0.20 [5.1]
MECHANICAL TOLERANCE: ± 0.015"
Marked with: specific modeL ordered, date code, job
code.
.040 [1.02] DIA.
7 PLACES
.081 [2.06] DIA.
2 PLACES
0.20 [5.1]
0.50 [12.7]
MATERIAL: Units are encapsulated in a low thermal
resistance molding compound which has excellent
chemical resistance and electrical properties in high
humidity environments and over a wide operating
temperature range. The encapsulant and outer shell of
the unit have UL94V-0 ratings. Lead material is solder
plated to allow ease of solderability.
0.40 [10.16]
.400 [10.16]
2.000
[50.80]
1.000
[25.40]
2.40
[61.0]
MAX
0.700
[17.78]
1.000
[25.40]
1.400
[35.56]
1.400
[35.56]
0.19 [4.8]
1.900
[48.26]
MOUNTING INSERTS M3 X 0.5 THRU, 4 PLACES
MAX. TORQUE, 8 IN/LBS
2.28
[57.91]
MAX
OUTPUT VOLTAGE ADJUST
This feature allows the user to accurately adjust the
module's output voltage set point to a specified level.
This is achieved by connecting a resistor or potentiometer
from the TRIM terminal to either the +Vout terminal (for
increased Vout) or the -Vout terminal (for decreased
Vout). The formulae below describe the trim resistor
value to obtain a Vout change of
∆
%.
Radj - up =
OVP NOTE
Special attention should be given to the peak voltage
deviation during a dynamic load step when trimming the
output above the original set point to avoid tripping the
overvoltage protection circuit. Should an OVP condition
occur, the converter will go into a latch condition and
must be externally reset before it will return to normal
operation.
(
Vo(100 +
∆
%)
1.225
∆
%
-
(100 + 2
∆
%)
∆
%
)
kΩ
Radj - down =
(
100
-
2
)
∆
%
kΩ
Page 4
VKA100xs RevA 7/98
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