OBSOLETE PRODUCT
Contact factory for replacement model
Corporate: www.cdtechno.com
VSX40MD23C
40 Watt Dual
Output Quarter
Brick DC/DC
Converter
2.5V & 3.3V Dual Output
2.3
"
x 1.5
"
x 0.5
"
90% Efficiency
Low Output Noise
Input Filtering
Remote On/Off, Input Side
Output Voltage Trim, +/-10%
Fixed Frequency Operation
-40C° to +100C° Baseplate Temp.
Output Current Limit, Self-Start
1,500 Vdc Isolation, Input to Output
UL/CUL 1950, EN60 950
36 to 75 Vdc Input Models
Continuous Short Circuit Protection
Non-latching Protection:
Input Undervoltage
Input Overvoltage
Output Overvoltage
Overtemperature
Output Voltage Tracking at
Turn-on and Turn-off
No Minimum Load Current
RoHS Compliant
APPLICATIONS
Distributed Power Architectures
Workstations
EDP Equipment
Telecommunications
The VSX40C series are dual output
converters having two input ranges,
either 18-36V or 36-75V. The units
dual asymmetric output voltages are
5V and 3.3V. The converter features an
industry-standard quarter-brick size
(2.3" x 1.5" x 0.5") coupled with 90%
efficiency.
These converters utilize Vx high density
technology. This technology has been
featured in our highly efficient VKP
and VKA series now successfully in use
OPTIONS
Choice of Remote On/Off logic
Configuration
Heatsink Available for
Extended Operation
worldwide. The very high efficiency
minimizes the requirement for heat-
sinking and the low output ripple
minimizes the need for additional
filtering. For maximum flexibility,
power can be traded between outputs as
required. The VSX40C series feature
virtually all of the options required
by design engineers but not at the
competition’s typical additional price for
each option. This multitude of features
are standard on the VSX40C series.
ADDITIONAL INFORMATION
See Application Note DCAN-41
at www.murata-ps.com
ISO9001
CERTIFIED
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage:
VSX40MD23C
I/O Isolation Voltage
I/P to case
O/P to case
Operating Case Temperature
Vi
100
1500
1500
-40
200
100
Vdc
Vdc
Vdc
Vdc
°C
SYMBOL
MIN
MAX
UNIT
T
VSX40MD23C
REV A
03/2006
1
SPECIFICATIONS, ALL MODELS
Specifications are at T
CASE
= +40°C nominal input voltage unless otherwise specified.
PARAMETER
Operating Input Voltage
VSX40MD23C
SYMBOL
Vi
MIN
36
TYP
48
MAX
75
UNITS
VDC
INPUT
Maximum Input Current
(Vi=0V to Vi max, Io=Io max)
VSX40MD23C
I/P Reflected Ripple Current
No Load Input Current
On/Off Activated Input Current
Ii max
IiNL
IiQ
35
20
1.5
260
A
mA p-p
mA
mA
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
OUTPUT
Under any conditions, the voltage of V1 will always be greater or equal to that of V2.
Output voltage (Note 1)
Over all conditions of I/P voltage,
load and temperature)
2.5 Vout (V2)
3.3 Vout (V1)
Output Voltage Setpoint
(Vi=48, Io
2
=9A, Io
3
=6A, Tc=25°C)
2.5 (V2)
3.3 (V1)
Output Ripple and Noise Voltage
(peak-to-peak, 100 MHz BW)
2.5 (V2)
3.3 (V1)
Output Current
(Total module O/P power should
not exceed 40 Watts)
2.5 (V2)
3.3 (V1)
Output Current Limit Inception
(Vo=95% of Vo nom)
2.5 (V2)
3.3 (V1)
Output Short Ckt Current
(Max impedance across short circuit = 65mΩ)
2.5 Vo
3.3 Vo
Efficiency (Vi=48V, Io
2
=8A,Io
3
=6A, Tc=40°C)
Dynamic Response
(ΔIo/Δt=0.2A/μsec.Vi=48V, Tc=25°C, either O/P)
Load change of 50% Io max; at any operating
load up to Iomax or Pomax Peak Deviation
outside settling point
2.5 Vo
3.3 Vo
2.375
3.225
_
_
2.555
3.450
Vdc
Vdc
2.5 Vo,set
3.3 Vo,set
2.450
3.310
2.510
3.390
Vdc
Vdc
_
_
_
_
_
_
60
80
mv p-p
mv p-p
Io
2
Io
1
_
_
_
_
16
12.12
A
A
Io
2
cli
Io
1
cli
16.8
12.7
18.5
14.0
21.0
15.9
A
A
15
11
η
88
19
13.2
90
22
17
_
A
A
%
–
–
2
_
%Vo nom
NOTE: 1. Worst case voltage conditions occur with full load drawn from one output only, zero being drawn from the other. For worst
case voltages at less extreme loading conditions, consult the factory.
VSX40MD23C
REV A
03/2006
2
PARAMETER
Isolation Specifications
Isolation Capacitance
Isolation Resistance
Feature Specifications
Remote On/Off (open collector equivalent,
signal referenced to -Vin terminal)
VSX40MD23C Preferred Logic (negative)
Logic Low - Module On
Logic High - Module Off
VSX40MD23-1C - Optional Logic (positive)
Logic Low - Module Off
Logic High - Module On
Logic Low: At Von/off = 0V
Turn On Time (Vo within 1% of steady state)
From Application of Vin
From Remote On/Off Activation)
Input Undervoltage Lockout
(Turn Off & Turn On Voltages Track)
Turn On
Turn Off
Input Overvoltage Lockout
(Turn Off & Turn On Voltages Track)
Turn Off
Turn On
Output Overvoltage Set Point
(Non-latching independent control loop)
2.5 Vo
3.3 Vo
Overtemperature
Weight
VSX40MD23C, VSX40MD23-1C
VSX40MD23-UC, VSX40MD23-1UC
Output Trim
Tie Trim to +2.5 Vo for trim down
Tie Trim to O/P RTN for trim up
2.5 V2
3.3 V1
2.5 V2
3.3 V1
Shutdown
Hysteresis
SYMBOL
_
_
MIN
_
10
TYP
1000
_
MAX
_
_
UNITS
pF
MΩ
Von/off
Ion/off
_
_
0
_
_
50
200
10
4
Vdc
μA
mSecs
mSecs
GENERAL
_
_
7
3
_
_
30
27
33
30
36
33
Vdc
Vdc
_
_
76
74.5
80
78.5
84
82.5
Vdc
Vdc
2.7
3.6
Tc
105
2.9
3.9
115
10
67
3.2
4.2
125
Vdc
Vdc
°C
°C
Grams
_
_
_
_
-10
-10
10
10
_
_
_
_
%
%
%
%
ORDERING INFORMATION
VSX40
Device Family
VSX40MD23 (Quarter Brick, 40 Watt DC/DC)
Logic: No Number = Preferred Logic (Negative);
1 = Optional Logic (Positive)
Package
No Letter = Encapsulated; U = Unencapsulated
RoHS Compliant
-1 U C
Model Numbers
VSX40MD23C
VSX40MD23-UC
VSX40MD23-1C
VSX40MD23-1UC
VSX40MD23C
REV A
03/2006
3
MECHANICAL
Dimensions are in inches (millimeters).
Tolerances: x.xx in. + 0.02 in.
x.xxx in. +0.01 in.
2.30
(58.42)
CASE OUTLINE
0.144 (3.66)
4 PLACES
1.50
(38.10)
.600
(15.24) .350
(8.89)
.000
.350
.600 (8.90)
(15.24) .750
(19.05)
.150
(3.81)
1
2
3
7
6
5
4
.375 (9.53)
.125 (3.18)
.125 (3.18)
.375 (9.53)
0.051 (1.30)
7 PLACES
.50
(12.70)
.145
(3.68)
.150
(3.81)
0.040 (1.02) 7 PLACES
2.000
(50.80)
RECOMMENDED PCB HOLE PATTERN
(VIEW OF PCB, THROUGH UNIT)
.000
Pinout Key
1
2
3
4
5
6
7
+Vin
On/Off
-Vin
+2.5 Vout
O/P RTN
Trim
+3.3 Vout
NOTES:
1.
Marked with: specific model ordered, date
code, job code.
2.
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.
3. IMPORTANT:
When utilizing the PEM nuts
for board mounting, it is required to follow
guidelines in application note DCAN-41
available on the web at www.murata-ps.com.
1.200
(30.48)
PIN 1
.150
(3.81)
M3 THREAD
4 PLACES
USA:
Canada:
UK:
Mansfield (MA), Tel: (508) 339 3000, email: sales@murata-ps.com
Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com
Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com
Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com
Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com
Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 & ISO 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2009 Murata Power Solutions, Inc.
France:
Japan:
China:
Germany:
München, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com
Singapore:
Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
2.000
(50.80)
VSX40MD23C
REV A
03/2006
4
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