VKA50LS05-6 [ETC]
Analog IC ; 模拟IC\nProduct Data Sheet
50 WATT SINGLE OUTPUT
HIGH DENSITY DC/DC CONVERTER
VKA50xS Seriesz
FEATURES
DESCRIPTION
! 18 - 36V & 33 - 75V INPUT RANGE
The VKA50xS Series DC/DC converters present an eco-
nomical 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.
! SMALL SIZE: 2.28" X 2.4" X 0.50"
! HIGH EFFICIENCY: 87% TYPICAL AT 5V
! 100µS TRANSIENT RESPONSE 50-100% LOAD STEP
! 420kHZ FIXED-FREQUENCY OPERATION
! OPERATION TO +100°C BASEPLATE TEMP.
! PRIMARY REMOTE ON/OFF, CHOICE OF POS/NEG
LOGIC
! ADJUSTABLE OUTPUT VOLTAGE
! REMOTE SENSE
The VKA50xS's proprietary control circuitry responds to
50-100% load steps in 100µSeconds to within 1% nomi-
nal Vout.
! CONTINUOUS SHORT-CIRCUIT PROTECTION
! THERMAL SHUTDOWN
The patented fixed frequency architecture combined with
surface mount technology results in a compact, efficient
and reliable solution to DC/DC conversion requirements.
! SAFETY PER UL1950, EN 60950 AND CSA 22.2 #234
! CASE GROUND PIN
Efficiency(%)
Efficiency(%)
Input
VOUT IOUT
Note (1)
Input
VOUT IOUT
Note (1)
Model
Voltage (VDC) (A)
Min
Typ
Model
Voltage (VDC) (A)
Min
Typ
VKA50MS03
3.3V
5.0V
10.0
10.0
4.2
81
86
88
89
89
82
VKA50LS03
3.3V
5.0V
10.0
10.0
4.2
80
85
87
88
89
81
VKA50MS05
VKA50MS12
VKA50MS15
VKA50MS24
48VDC
(33-75)
87
89
90
90
VKA50LS05
VKA50LS12
VKA50LS15
VKA50LS24
24VDC
(18-36)
86
88
89
90
12.0V
15.0V
24.0V
12.0V
15.0V
24.0V
3.3
3.3
2.1
2.1
AGENCYAPPROVALS
VKA50xS Rev C 3/2001
Page 1
COMMON SPECIFICATIONS
Specifications typical at TCASE = +40°C, nominal input voltage, rated output current unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
Voltage Range
VKA50LS
VKA50MS
18
33
24
48
36
75
VDC
VDC
Maximum Input Current
VKA50LS
VKA50MS
V
V
IN = 16VDC
IN = 27VDC
3.7
2.2
A
A
Reflected Ripple Current
Input Ripple Rejection
No Load Input Current LS/MS
Power Dissipation LS/MS
No Load
Peak - Peak
DC to 1KHz
20
60
50/100
mA
dB
mA
50
3.6/4.8
0.18/0.4
W
W
Standby, Primary On/Off Disabled LS/MS
Inrush Charge
VIN = VINmax.
VKA50LS
VKA50MS
0.520
0.360
mC
mC
Quiescent Operating Current
Primary On/Off Disabled
8
12
mA
OUTPUT
Rated Power
Set point Accuracy
LineRegulation
0
50
1
0.05
0.05
W
%
%
High Line to Low Line
No Load to Rated Load
0.02
0.02
±.02
1%
LoadRegulation
%
Output Temperature Drift
Output Ripple, p-p
Output Current Limit Inception
Output Short-Circuit Current (2)
Output Overvoltage Limit
Transient Response
Peak Deviation
%/°C
VOUT, Nom
OUT, Nom
OUT, Nom
V
DC to 20MHz BW
test
130%
110%
130%
l
l
125%
50 to 100% Load Step
di/dt = 1.0A/µSec
2%
V
OUT, Nom
Settling Time
V
OUT, 1% of Nominal Output
100
µSec
ISOLATION
Input to Output
Input to Baseplate
Output to Baseplate
Resistance
Peak Test for 2 Seconds
1500
1500
500
10
VDC
VDC
VDC
MΩ
Capacitance
Leakage Current
2000
180
pF
µA, rms
VISO = 240VAC, 60Hz
GENERAL
Efficiency, Line, Load, Temp. (3)
Switching Frequency
Remote Sense Compensation
Output Voltage Adjust Range-12V & higher(4)
Remote On/Off Control Inputs
Primary
400
420
440
0.5
KHz
V
OUT, Nom
-50% / +25%
V
Open Collector/Drain
Sink Current-Logic Low
Vlow
1.0
0.4
mA
V
Vhigh
Turn-on Time
OpenCollector
12.5
Within 1% of Rated Output
10.0
mSec
Weight
85 (3.0)
g (oz.)
TEMPERATURE
Operation/Specification
Storage
Case Temperature
Case Temperature
Case Temperature
-40
-55
+25
+25
+100
+125
+115
°C
°C
ShutdownTemperature
ThermalImpedance,case-ambient
Lead Solder Temperature
+100
°C
7.1
°C/W
°C
10 Seconds max
+300
( ) See NOTES on page 3.
Page 2
VKA50xs Rev C 3/2001
NOTES:
(1) See Typical Performance Curves, page 3
ORDERING INFORMATION
VKA50 xSzz-
(2) Continuous Mode
Device Family
(3) See graphs for Efficiency vs. Output Load, VIN, TCASE
(4) 3.3V Models Limited in Trim Down Range
(5) Consult Factory for Details
Indicates 50 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
TA = +40°C, nominal input voltage, rated load, recommended external components applied, unless otherwise specified.
EFFICIENCY vs OUTPUT LOAD
EFFICIENCY vs OUTPUT LOAD
95
90
95
90
EFFICIENCY vs TEMPERATURE
28V
24V
15V
+10
+5
12V
5V
85
80
85
80
3.3V
15V
24V
TYP
100% Load
20% Load
28V
-5
75
70
75
70
-10
20
40
60
80
100
20
40
60
80
100
0
0
-55
-15
+25
+65
+105
Output Load (% of Rated)
Output Load (% of Rated)
Tcase (°C)
EFFICIENCY vs INPUT VOLTAGE
OUTPUT RIPPLE vs INPUT VOLTAGE
OUTPUT RIPPLE vs TEMPERATURE
3.0
2.0
1.0
+10
+5
1.50
1.25
1.00
0.75
0.50
TYP
-5
100% Load
50% Load
0.5
10% Load
0.33
-10
Vin, min
Vin, typ
Vin, max
Vin, min
Vin, typ
Vin, max
-15
+25
+65
+105
-55
Tcase (°C)
Vin (VDC)
Vin (VDC)
REFLECTED RIPPLE CURRENT
vsTEMPERATURE
+100
POWER DERATING WITH NO HEATSINK
+50
TYP
-50
22
20
18
16
14
12
400 LFM
200
LFM
-100
10
8
-15
+25
+65
+105
-55
Tcase (°C)
Natural
Convection
6
4
2
0
0
25
50
75
100
Ambient Temperature (°C)
VKA50xS Rev C 3/2001
Page 3
MECHANICAL
NOTES:
All dimensions are in inches (millimeters).
PIN PLACEMENT TOLERANCE: ± 0.005"
MECHANICAL TOLERANCE: ± 0.015"
0.530 MAX
[13.46]
Marked with: specific modeL ordered, date code, job
code.
0.20 [5.1]
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.
.040 [1.02] DIA.
7 PLACES
.081 [2.06] DIA.
2 PLACES
0.20 [5.1]
0.50 [12.7]
.400 [10.16]
0.40 [10.16]
2.000
[50.80]
0.700
[17.78]
1.000
[25.40]
1.000
[25.40]
2.40
[61.0]
MAX
1.400
1.400
[35.56]
[35.56]
MOUNTING INSERTS M3 X 0.5 THRU, 4 PLACES
MAX. TORQUE, 8 IN/LBS
1.900
0.19 [4.8]
[48.26]
2.28
[57.91]
MAX
OVP NOTE
OUTPUT VOLTAGE ADJUST
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.
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 ∆%. VO is output
voltage prior to adjustment (3.3V, 5V, 12V, 15V, 24V or
28V).
Vo(100 + ∆%)
1.225∆%
(100 + 2∆%)
∆%
_
Radj - up =
kΩ
(
)
100
∆%
Radj - down =
(
- 2
)
kΩ
Power Electronics Division, United States
3400 E Britannia Drive,Tucson, Arizona 85706
Phone: 800.547.2537
C&D Technologies, (NCL)
Tanners Drive Blakelands North
Milton Keynes MK14 5BU UK
Power Electronics Division, Europe
C&D Technologies (Power Electronics) Ltd.
132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland
Fax: 520.770.9369
Tel: +44 (0)1908 615232
Fax: +44 (0)1908 617545
Tel:+353.61.474.133
Fax:+353.61.474.141
Any data, prices, descriptions or specifications presented herein are subject to revision by C&DTechnologies, Inc.without notice. While such information is believed to be accurate as indicated herein, C&D
Technologies, Inc.makes no warranty and hereby disclaims all warranties, express or implied, with regard to the accuracy or completeness of such information. Further, because the product(s) featured
herein may be used under conditions beyond its control, C&DTechnologies, Inc.hereby disclaims all warranties, either express or implied, concerning the fitness or suitability of such product(s) for any
particular use or in any specific application or arising from any course of dealing or usage of trade. The user is solely responsible for determining the suitability of the product(s) featured herein for user’s
intended purpose and in user’s specific application.C&DTechnologies, Inc.does not warrant or recommend that any of its products be used in any life support or aviation or aerospace applications.
Page 4
VKA50xs Rev C 3/2001
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