CDtechno VSX50MD23-U, VSX50MD23-1U, VSX50MD23-1, VSX50MD23 Datasheet
Corporate: www.cdtechno.com
Product: www.cdpowerelectronics.com
VSX50MD23
50 Watt Dual Output Quarter Brick DC/DC Converter
VSX50
VSX50-U
APPLICATIONS
Distributed Power Architectures
Workstations
EDP Equipment
Telecommunications
OPTIONS
Choice of Remote On/Off Logic
Configuration
Heatsink Available for Extended
Operation
2.5V & 3.3V Dual Output
2.3" x 1.5" x 0.5"
89% Efficiency
Low Output Noise
Input Filtering
Remote On/Off, Input Side
Output Voltage Trim, +10%/-8%
Fixed Frequency Operation
-40C° to +100C° Baseplate Temp.
Output Current Limit, Self-Start
1,500 Vdc Isolation, Input to Output
The VSX50 Series are 50 Watt, compact,
high-efficiency, high-density dual output
converters with a 36-75V input and
2.5Vdc and 3.3Vdc outputs. The industry
quarter-pack size of 2.3" x 1.5" x 0.5"
coupled with 89% efficiency is an
industry high-density breakthrough.
These converters utilize V Series high
density technology. This technology has
been featured in our highly efficient VKP
and VKA Series now successfully in use
worldwide. The very high 89%
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
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 VSX50 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 VSX50
Series.
ADDITIONAL INFORMATION
See Application Note DCAN-41
at www.cdpowerelectronics.com
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL MIN MAX UNIT
Input Voltage:
VSX50MD23 Vi 100 Vd c
I/O Isolation Voltage 1500 Vdc
I/P to case 1500 Vdc
O/P to case 200 Vdc
Operating Case Temperature T -40 100 °C
Product: www.cdpowerelectronics.com
VSX50MD23 REV B 5/02
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SPECIFICATIONS, ALL MODELS
Specifications are at T
PARAMETER SYMBOL MIN TYP MAX UNITS
INPUT
Voltage Range 36 48 75 VDC
Input Reflected Ripple Current Peak - Peak 325 mA
Maximum Input Current Vin = 30V, Pout 50W 2 A
No Load Input Current 60 mA
On/Off Activated Input Current 25 mA
Input Undervoltage Lockout
INPUT
Turn On 30 33 36 VDC
Turn Off 27 30 33 VDC
Input Overvoltage Lockout
Turn Off 76 80 84 VDC
Turn On 74.5 78.5 82.5 VDC
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Power 50 Watts
Output Efficiency Io1=10A, Io2=7.5A 88 %
Set Point Voltage
V1 (2.5V) Io1=10A 2.460 2.5 2.530 VDC
V2 (3.3V) Io2=7.5A 3.290 3.3 3.360 VDC
Output Current Total Module Output
V1 (2.5V) Power Should Not 0 20 A
V2 (3.3V) Exceed 50 Watts 0 15 A
Output Ripple And Noise Voltage 100 MHz BW
V1 (2.5V) 60 mV
V2 (3.3V) 80 mV
Output Adjust Range Both Outputs Will Adjust -8 +10 %
Output Temperature Drift 0.02 0.05 % /°C
Line Regulation VIN = 36 to 75 0.10 0.20 %
Load Regulation
V1 (2.5V) I1= 0 to 20A, I2=0A 4 % of Nom
V2 (3.3V) I1=0A, I2=0 to 15.15A 2.5 % of Nom
Load Cross Regulation
V1 (2.5V) I1= 0A, I2=0 to 15.15A 1.5 % of Nom
V2 (3.3V) I1=0 to 20A, I2=0A 3.5 % of Nom
Output Current Limit Inception
V1 (2.5V) 21.0 24.0 28.0 A
V2 (3.3V) 16.0 17.5 22.0 A
Short Circuit Current
V1 (2.5V) 19.0 23.0 28.0 A
V2 (3.3V) 14.0 18.0 22.0 A
Output Overvoltage Set Point
(Non-latching independent
control loop)
V1 (2.5V) 2.70 2.90 3.25 VDC
V2 (3.3V) 3.60 3.90 4.30 VDC
Transient Response (∆Ιο/∆t=0.2A/µsec either
Settling Time output) Load change of 40% 100 µsec
OUTPUT Under any conditions, the voltage of V1 will always be greater or equal to that of V2.
Peak Deviation of Ιο max at any operating 4 %
Switching Frequency 330 KHz
= +40°C nominal input voltage unless otherwise specified.
CASE
at the Same Time and
by the Same %
I1=10A, I2=7.5A
load up to Ιο max and Pο max
P-P
P-P
Product: www.cdpowerelectronics.com
VSX50MD23 REV B 5/02
2
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