TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
MDS-250A Series
Highlights & Features
• Safety Approvals to IEC 60601-1 3.1rd ed. & IEC 62368-1
• Compliant with IEC 60601-1-2 4th Ed. Requirements
• Up to 150 Watt Convection
• Up to 500 K Hrs MTBF
• Suited for Type BF Medical Products
• 2 × MOPP isolation
Safety Standards
CB Certified for worldwide use
Model Number:
Unit Weight:
MDS-250A
405 g (MDS-250APB12)
610 g (MDS-250ADB12)
Dimensions (L x W x H):
127.3 x 76.5 x 36.1 mm 5 x 3 x 1.4 inch
(MDS-250APB12)
140.0 x 88.9 x 44.4 mm 5.5 x 3.5 x 1.75 inch (MDS-250ADB12)
General Description
Delta’s new MDS-250APB12 open frame design offers a high energy density (12 Watts/in3) 3 x 5 inch design for Type BF patient
access medical products. With operating parameters of 90 to 264 Vac universal input voltage, temperatures of -10 to +70 degrees
centigrade, and altitudes of up to 5000 meters (16,400 feet), the design is well suited for a variety of both medical and non-medical
applications. Other features include input surge of 300 Vac, low leakage current, no-load input power < 0.5 Watt, and 500 K hour MTBF.
This product is certified for EMC standards EN/BS EN 55011 for industrial, scientific and medical (ISM) radio-frequency equipment, and
EN/BS EN 55032 for Industrial Technology Equipment (ITE) radio-frequency equipment.
An enhanced feature set, includes a 5 Volt/0.5 amp standby output, remote on/off, remote sense, and a power good signal that are
included as part of the standard product.
The design, which has protection against shock compliant with 2XMOPP and Type BF requirements, has both medical (with risk report
available), and ITE safety approvals, including cURus(US&Canada) /TUV/GB(China); plus, CB certificates with all national deviations.
Full compliance with RoHS Directive for environmental protection is included. The unit comes in a standard 3 x 5 inch footprint, with
height suitable for 1U applications. Robust terminals are capable of multiple connections of the main output to the end product.
Enclosed assembly is available option.
Model Information (All with 5 V/0.5 A standby available)
Model Number
Input Voltage
Output Voltage Convection Current
Output
Forced Air Current Output
MDS-250APB12
90-264 Vac
12 Vdc
0-12.5 A
0-20.84 A(with 10 CFM forced air)
MDS-250ADB12 (Enclosed cover)
90-264 Vac
12 Vdc
0-11.25 A
0-20.84 A(with 10 CFM forced air)
1
MDS
250
A
B
12
Delta Medical
Power Supply
Max wattage in the
product series.
250 →250 W
Family Code
Product Type
P:Open Frame
D: Enclosed
Input Type Code
B: 3pin Class I
Output Voltage
12 for 12 V
AA: With Remote On/Off
AB: Without Remote On/Off
Refer to page. 9
A~ Z
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Specifications
Input Ratings / Characteristics
Nominal Input Voltage
100-240 Vac
Input Voltage Range
90-264V ac
Nominal Input Frequency
50-60 Hz
Input Frequency Range
47-63 Hz
Input Current (max)
3.5 A
Input Surge Voltage (max)
300 Vac for 100 ms
Full load Efficiency (typ.)
89.45% @ 115 Vac/60 Hz
90.50% @ 230 Vac/50 Hz, Reference Fig.1
Standby Power (max)
0.5 W (Inhibit signal high, 24 volt turned off)
@ 115 Vac/60 Hz, 230 Vac/50 Hz
Inrush Current (max)
40 A @ 230 Vac, cold start
Input-PE(protective earth) leakage current (max)
0.1 mA @ NC1), 0.3 mA @ SFC1)
Output-PE(protective earth) leakage current for Type BF application (max)
0.1 mA @ NC1), 0.5 mA @ SFC1)
Power Factor (min)
0.9 @ 115 V/50 Hz, 230 V/50 Hz, full load
1) NC: normal condition, SFC: single fault condition
Leakage Current
Input-PE Leakage Current
100 Vac/60 Hz (Typ)
264 Vac/60 Hz(Typ)
Delta Limit
IEC60601-1 Limit
Normal Condition 17.5 uA
43.5 uA
100 uA max
5000 uA max
Single Fault Condition 32.9 uA
90.7 uA
300 uA max
10000 uA max
86.7 uA
100 uA max
100 uA max
128.6 uA
500 uA max
500 uA max
Output-PE Leakage Current for Type BF application
Normal Condition 28.5 uA
Single Fault Condition 42.9 uA
Fig.1 Efficiency versus output load
2
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Output Ratings / Characteristics (Main Output)
Nominal Output Voltage (Vrated)
12 V
Total Regulation
± 3%
Output Power
250 W 10 CFM air, up to 150 W convection air
Line Regulation (max)
±0.5%
Load Regulation (max)
±1%
Ripple & Noise (typ.)
1% pk-pk Vrated@250W load, (Refer to Fig. 2 & Fig. 3)
Start-up Time (max)
2000 ms @ 115 Vac
Hold-up Time (min)
10 ms @ 100 Vac and 115 Vac, with 250 W load
20 ms @ 100 Vac and 115 Vac, with 130 W load
Dynamic Response (Overshoot & Undershoot O/P Voltage)
± 5% @ with 50-100% load change
Capacitive load (max)
1500 uF
Rise time (max)
100 ms
Remote Sense
Up to 500 mV compensation for voltage drop across
external wire connections to load.
Short and reverse connection protected.
Output Ratings / Characteristics—Standby Output
Nominal Output Voltage of standby output (Vrated)
5V
Total Regulation of standby output
± 3%
Ripple & Noise of standby output
100 mV max (Refer to Fig. 2 & Fig. 3)
(a) 115V (measured value=112.0mV for 12V and 28.8mV for 5V)
(b) 230V(measured value=113.6mV for 12V and 30.4mV for 5V)
Fig.2 Ripple & Noise example, 20MHz BW
PSU
5cm
0.47uF Ceramic
10uF Electrolytic
Load
Test Fixture
Fig. 3 Ripple & Noise measurement circuit
3
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
Scope
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Mechanical
Case Cover
Enclosed, refer to drawings on pages 8 and 9
Dimensions (L x W x H)
127.3 x 76.5 x 36.1 mm 5 x 3 x 1.4 inch
(MDS-250APB12)
140.0 x 88.9 x 45.0 mm 5.5 x 3.5 x 1.75 inch (MDS-250ADB12)
Unit Weight
405 g (0.89 lb.) (MDS-250APB12)
610 g (1.34 lb.) (MDS-250ADB12)
Environment
Surrounding Air Temperature
Operating
Storage
Absolute Maximum/Minimum Rating.
-10°C to +70°C. Linearly derate from 100% load at 50°C to 45 ~
50% load at 70°C
Note: see power de-rating curves below
-40°C to +85°C
Operating Humidity
5-95% RH (Non-Condensing)
Operating Altitude
5,000 meters (16,400 feet or 50 kPa)
Non-Operating Altitude
5,000 meters (16,400 feet or 50 kPa)
Shock Test (Non-Operating)
50 G, 11 ms, 3 shocks for each direction
Vibration (Operating)
5-500 Hz, 2 Grms, 15 minute for each three axis
Power De-rating curves
MDS-250APB12
Open frame model
Load De-rating Fixture and Test Setup. Fan is DELTA Part Number AFB0512HHD.
MDS-250APB12 Open frame model
Airflow Direction 10CFM
4
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
MDS-250ADB12
Enclosed cover model
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
MDS-250ADB12 Enclosed cover model
Airflow Direction 10CFM
Protections (for both 12 Volt and 5 Volt Standby outputs, unless otherwise indicated)
Overvoltage (max)
Main output 125% of rated voltage, Latch Mode
Standby Output 125% of rated voltage, Latch Mode
Over load / Over current (max)
Main output 160% of rated current
Standby Output 1.06 A max
Hiccup Mode(Non-Latching, Auto-Recovery)
Over Temperature
Latch Mode for main output
Short Circuit
Hiccup Mode,
(Non-Latching, Auto-Recovery)
Reliability Data
MTBF(Minimum) at 115Vac, 150 W, 35 °C
Convection Air Flow
Operating life(Minimum) at 115Vac, 150 W, 25°C Convection Air Flow
500 Khrs based on Telecordia SR-332
26,280 hrs
Safety Standards / Directives
Medical Safety
IEC 60601-1 2nd , 3rd and 3.1rd edition CB report
IEC 60601-1 edition 3.1rd (2012), EN 60601-1 (2006) + A11
+ A1 + A12, CAN/CSA-C22.2 NO. 60601-1:14, ANSI /
AAMI ES 60601-1:2005/(R) 2012
ITE Safety
IEC 60950-1, IEC 62368-1 CB report
TUV 60950-1
UL 60950-1+CAN/CSA 60950-1
CE
UKCA
Galvanic Isolation
In conformance with EMC Directive 2014/30/EU and Low
Voltage Directive 2014/35/EU
EN 60601-1: 2006 + A11: 2011 + A1L 2013 + A12: 2014 &
EN 60601-1-2: 2015
In conformance with Electrical Equipment (Safety)
Regulations 2016 and Electromagnetic Compatibility
Regulations 2016, Medical Devices Regulations 2002 (UK
MDR 2002)
Input to/Output (2XMOPP) 4000 Vac
Input to/Ground(1XMOPP) 1500 Vac1)
Output to/Ground(1XMOPP) 1500 Vac (Type BF application rated)
1) PSU can support PoE applications with Primary to FG 2500Vac test.
5
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
EMC (Compliant with IEC-60601-1-2 4th Ed. requirements)
EMC / Emissions
Harmonic Current Emissions
EN/BS EN 55011, EN/BS EN 55032,FCC Title 47:Class B
IEC61000-3-2
Meet Class D limit
Immunity to
Voltage Flicker
IEC61000-3-3
Electrostatic Discharge
IEC61000-4-2
Level 4 Criteria A1)
Air Discharge: 15 kV
Contact Discharge: 8 kV
Radiated Field
IEC61000-4-3
Electrical Fast Transient / Burst
IEC61000-4-4
Criteria A1)
80 MHz-2700 MHz, 10 V/m AM modulation
385 MHz-5785 MHz, 28 V/m Pulse mode and other
modulation
Level 3 Criteria A1) :2 kV
Surge
IEC61000-4-5
Level 3 Criteria A1)
Common Mode3): 2 kV
Differential Mode4): 1 kV
Conducted
IEC61000-4-6
Level 2 Criteria A1)
150 kHz-80 MHz, 3 Vrms, 6 Vrms at ISM bands and
Power Frequency Magnetic Fields
IEC61000-4-8
Criteria A1)
Magnetic field strength 30 A/m
Amateur radio bands
Voltage Dips
IEC61000-4-11
Criteria A1)
0% UT, 0.5 cycle (10 ms)
, 0o/45o/90o/135o/180o/225o/270o/315o/360o
Criteria B2) (Criteria A1) with 130 W load)
0% UT, 1 cycle (20 ms), 0o
Criteria B2)
70% UT, 25 cycle (500 ms), 0o
Criteria B2)
0% UT, 250 cycle (5000 ms), 0o
1) Criteria A: Normal performance within the specification limits
2) Criteria B: Output out of regulation, or shuts down during test. Automatically restore to normal operation after test.
3) Asymmetrical: Common mode (Line to earth)
4) Symmetrical: Differential mode (Line to line)
5) Unless otherwise noted, requirements apply at 250 watt output load
6
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Dimensions
Open Frame Mechanical drawing (MDS-250APB12)
7
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Covered Enclosure Mechanical drawing (MDS-250ADB12)
Notes
•
Dimensions are in mm(inches)
•
There are two locations where assembled power supply is connected to the customer’s product
a.
Bottom mounting, use (4X) M3 screws to affix assembled power supply to product’s enclosure. Extruded hole with thread must
be withstand 9 Kgf.cm (7.81 lb-in) min. Maximum allowed screw penetration is 3.5 mm (0.138 inch).
b.
Side mounting, use (2X) M3 screws to affix one side of assembled power supply to the product’s enclosure. Extruded hole with
thread must be withstand 9 Kgf.cm (7.81 lb-in) min. Maximum allowed screw penetration is 3.5 mm (0.138 inch).
8
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
•
CN1 mates with Molex housing 26-03-4030 and Molex series 6838 crimp terminals. Input Line can also be connected to Input
Neutral, and Input Neutral can be connected to Input Line.
•
CN102 & CN103(Output Connector) : Cross recessed pan head screws M3X0.5x10, with spring washers and flat washers, force
required to tighten the screws is 7~8 kgf.cm(6.1~7.0 inch-lb)
•
CN2 : PINGOOD JP-13T or equivalent mates with KST:FDFNYD1-187 or other applicable connectors.
•
CN101 mates with JST housing SHR-10V-S-B & SHR-10V-S and and JST SSH-003T-P0.2-H crimp terminals.
Control and STANDBY connector CN101
Pin 1
Remote sense +
Pin 2
Remote sense –
Pin 3
Power Good +
Pin 4
Power Good -(DC RTN)
Pin 5
Remote ON_OFF/INHIBIT +
Pin 6
Remote ON_OFF/INHIBIT -(DC RTN)
Pin 7
5V Standby
Pin 8
DC RTN
Pin 9
5V Standby
Pin 10
DC RTN
For optimum EMI performance, the two mounting points shown in open frame mechanical drawing need to be connected together to
system earth case. Protective bonding conductor from the end product protective earth terminal can be tied to CN2 for open frame
model. CN2 of enclosed model is connected to the cover by assembly screws already; in this case, system protective earth connection
can be connected to the cover or to CN2
MDS-250AXB12
9
AA
Delta Standard
AB
A mating connector with JST housing SHR-10V-S-B & SHR-10V-S and JST SSH-003T-P0.2-H terminals, with
jumper wire between pins 5 and 6, will be inserted into CN101. This will allow the power supply to turn on, without
user intervention, upon the application of input AC voltage Due to presence of mating connector, external
connections cannot be made to pins 1-10 of CN101.
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Functions
Start-up Time
The time required for the output voltage to reach 90% of its final steady state value, after the input voltage is applied.
Rise Time
The time required for the output voltage to change from 10% to 90% of its final steady state value.
Hold-up Time
Time between the collapse of the AC input voltage, and the output falling to 90% of its steady state value.
■ Graph illustrating the Start-up Time, Rise Time, and Hold-up Time
10
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Dynamic Response(12 Volt Output)
Overload & Over current Protections
The power supply output voltage will remain within ±5% of its
steady state value, when subjected to a dynamic load 50 to 100%
of its rated current.
■ 50 to 100% Load
The power supply’s Overload (OLP) and Over current (OCP)
Protections will be activated before the 12 volt outputs’ current
exceeds 160% of IO (Max load). Upon such an occurrence, VO
will start to drop. Once the power supply has reached its
maximum power limit, the protection will be activated and the
power supply will go into “Hiccup mode” (Auto-Recovery). The
power supply will recover once the fault condition causing the
OLP and OCP is removed and IO is back within the specified limit.
For the standby output, the performance is the same, with the
exception that the protection will be activated before the output
current exceeds 1.06 amps.
Inrush Current
Inrush current is the input current that occurs when the input
voltage is first applied. For AC input voltages, the maximum peak
value of inrush current will occur during the first half cycle of the
applied AC voltage. This peak value decreases exponentially
during subsequent cycles of AC voltage.
Additionally, if the 12 Volts’ Iout is >100%; but 100% load.
In the event of a higher operating temperature condition at 100%
load, the power supply will run into OTP when the surrounding air
temperature is higher than the operating temperature. When
activated, the output voltage will go into latch mode until the input
voltage is removed; then, reapplied, and the surrounding air
temperature drops to its normal operating temperature.
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Power Good
Remote On_Off/ INHIBIT
Power Good+ pin is an open collector transistor (40V/600mA
rating). A resistor (suggested value 10Kohm, 1/8W) can be added
between 5V STANDBY pin (or, other available pull-up voltage
that is no greater than 30V) and the Power Good+ pin (refer to
figure below). Value of pull-up resistor may have to be adjusted,
depending on voltage used, and other end-use conditions of the
Power Good+ pin connection to the product. When AC input is
on, Power Good+ pin will be high. When AC input is off, Power
Good+ pin will be low. There will be a minimum of 5 milliseconds
(at 150W load) between the time the power good goes to low
level, and the time when the output reaches 90% of its rated
value.
Remote ON_OFF/ INHIBIT can be used to enable or disable only
the main output. When the main output is disabled, the +5V
Standby output will continue to operate. This signal can be pulled
down to a low level of 0.3 volts, or shorted to DC-Return, in order
for the main output to be enabled; and, floated (no connection to
the signal), or pulled up to a value greater than or equal to 3 volts,
in order to disable the main output
Remote Sense
Remote sense feature can be used to compensate for the extra
voltage drop on output wires that are connected from the main
output terminals, to the load. With wires connected from the
remote sense pins, at the same locations as the wires from the
main output, the remote sense function can compensate up to
500mV voltage drop. The power supply will not be damaged if the
remote sense pins are shorted, or if a reverse/inverted polarity
connection is made to the load
.
12
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)
TECHNICAL DATASHEET
Medical AC-DC Open Frame Power Supply
12 V 250 W with 5 V/0.5 A Standby / MDS-250A series
Certificate
Delta has been certified as meeting the requirement of ISO 13485: 2003 and EN ISO
13485:2012 for the design and manufacture of switching power supply and adaptor for medical
device.
In addition to a UL Total Certification Program (TCP) approved client laboratory for IEC 62368-1.
Delta also has participated UL Client Test Data Program (CDTP) for IEC 60601
Attention
Delta provides all information in the datasheets on an “AS IS” basis and does not offer any kind of warranty through the information for
using the product. In the event of any discrepancy between the information in the catalog and datasheets, the datasheets shall prevail
(please refer to www.DeltaPSU.com for the latest datasheets information). Delta shall have no liability of indemnification for any claim
or action arising from any error for the provided information in the datasheets. Customer shall take its responsibility for evaluation of
using the product before placing an order with Delta.
Delta reserves the right to make changes to the information described in the datasheets without notice.
Manufacturer and Authorized Representatives Information
Manufacturer
Thailand
Delta Electronics (Thailand) PCL.
909 Pattana 1 Rd., Muang, Samutprakarn, 10280 Thailand
Taiwan
Delta Electronics, Inc.
3 Tungyuan Road, Chungli Industrial Zone, Taoyuan County
32063, Taiwan
Authorized Representatives
The Netherlands
Delta Greentech (Netherlands) B.V.
Zandsteen 15, 2132 MZ Hoofddorp, The Netherlands
13
United Kingdom
Delta Electronics Europe Limited
1 Redwood Court, Peel Park Campus,
East Kilbride, Glasgow, G74 5PF, United Kingdom
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (August 2022, Rev. 18)