MINT1275
275W Single Output
Medical Series
Features
3” x 5” x 1.4” Package
Ideal for 1U Applications
Class I and Class II versions
Up to 275W of AC-DC Power
Universal Input 90-264 VAC
Approved to CSA/EN/IEC/UL60601-1, 3
rd
Edition, 2 x MOPP Isolation
Forced Current Share
5V standby and 12V fan outputs
Inhibit, Power Fail, Output OK Signals
Efficiency 92% typical
3 Year Warranty
RoHS Compliant
Description
A Superior performance 275 Watts AC to DC power supply designed for Medical applications. Feature rich and highly
Efficient, the MINT1275 product family with active current share for redundant applications can easily fit in 1U chassis,
and provides 180 Watts convection cooled or 275 Watts with moving air. Input & output monitoring alarms plus 12V/1A
fan output and 5V standby voltage are among other standard features available in the MINT1275 family. All 5 models are
CE marked to the low voltage directive and approved to IEC60601-1 3rd edition.
Model Selection
Model
Number
MINT1275A1214K01
MINT1275A1514K01
MINT1275A2414K01
MINT1275A4814K01
MINT1275A5614K01
Notes:
Volts
12V
15V
24V
48V
56V***
Output Current*
w/200LFM air Convection
21.8A
18.3A
10.9A
5.46A
4.68A
15.0A
12.0A
7.50A
3.75A
3.21A
Fan Output
12Vdc/1.0A
12Vdc/1.0A
12Vdc/1.0A
12Vdc/1.0A
12Vdc/1.0A
Ripple &
Noise**
120mV pk-pk
150mV pk-pk
240mV pk-pk
480mV pk-pk
560mV pk-pk
Total
Regulation
±3%
±3%
±3%
±3%
±3%
OVP
Threshold
14.0
±
1.1V
19.5 ± 1.5V
28.0 ± 2.5V
55.0 ± 4.0V
59.0 ± 1.0V
* Total convection power is 180 Watts.
** Measured with noise probe directly across output terminals, and load terminated with 0.1µF ceramic and 10µF low ESR capacitors.
*** No Output adjustment on 56V model.
General Specifications
AC Input
100-240Vac, ±10%, 47-63Hz, 1∅
120–370Vdc
115Vac: 3A, 230Vac: 1.5A, 3.7A max at
90Vac
Turn On Time
Less than 2 sec. @115Vac (inversely
proportional to input voltage and thermistor
temperature)
>16mS at 250W, 120Vac
Input Current
Hold-up Time
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MINT1275 REV 1.6, 22-Jan-14
1
MINT1275
275W Single Output
Medical Series
General Specifications
(continued)
Inrush Current
264Vac, cold start: will not exceed 50A
Signals
Overload
Protection
Short Circuit
Protection
Overvoltage
Protection
Switching
Frequency
Isolation
Operating
Temperature
Temperature
Derating
Storage
Temperature
Altitude
AC Power Fail, DC OK, Inhibit, Current Share
Input Fuses
Earth Leakage
Current
Efficiency
F1, F2: 5A, 275VAC fuses provided on all
models
120%-150% of rating, Hiccup Mode
<275µA@264Vac, 60Hz, NC; <400µA SFC
Provided - no damage will occur if the output is
shorted. Hiccup Mode.
OVP latch at 110%-130% of rated output
voltage.
PFC: Variable, 30kHz - 400kHz
Main Converter: Variable 30-250kHz, 65-70kHz
at full load.
Input-Output: 4000Vac, 2 x MOPP
Input-Ground: 1800Vac, 1 x MOPP
Output-Ground: 1500Vac
-10° to +70°
C
C
Start Up at -40° full load
C,
Derate output power linearly above 50° to 50%
C
at 70°
C
92% typical
275W continuous, with 200 lfm airflow, 180W
convection cooled – See chart for specific
voltage model ratings.
500µS typ. for return to within 0.5% of
nominal, 50% load step.
∆i/∆t
<0.2A/µS.
Max Volt Deviation = 3%
See chart
Output Power
Transient
Response
Ripple and Noise
Output Voltage
Voltage
Adjustability
Minimum Load
See chart
+/-5% from nominal
-40° to +85°
C
C
Not required
Operating: -500 to 10,000 ft.
Non-operating: -500 to 40,000 ft.
Total Regulation
+/- 3%. See chart
Operating: 0.003g²/Hz, 1.5grms overall, 3
axes, 10 min/axis
Non-Operating: 0.026g²/Hz, 5.0grms overall,
3 axes, 1 hr/axis
W: 3.0” x L: 5.0” x H: 1.4”(max. measured
from bottom of the board to top of
components)
325g
Relative Humidity
5% to 95%, non-condensing
Operating: Half-sine, 20gpk, 10ms, 3 axes, 6
shocks total
Non-Operating: Half-sine, 40 gpk, 10 ms, 3
axes, 6 shocks total
EN/CSA/UL/IEC 60601-1, 3
rd
Edition
Vibration
Shock
Dimensions
Safety Standards
Weight
MTBF
465,000 hours, 275W load, 25°C Ambient,
110Vac input
Auxiliary Signals
Standby Output
5V @ 200 mA
DC OK:
Open collector logic signal goes and stays HIGH
100mS to 500mS after main output reaches
regulation.
12V @ 1A
AC Power Fail:
Goes LOW with 5mS warning before loss of
DC output after loss of AC power.
Connect to inhibit pin (J201 pin 5) to output
common to inhibit the DC output.
Compensates for up to 250mV drop in load
lines.
Fan Output:
Inhibit:
Current Share:
Forced Current Sharing provided for up to 5
units connected in parallel.
Remote Sense:
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MINT1275 REV 1.6, 22-Jan-14
2
MINT1275
275W Single Output
Medical Series
EMI/EMC Compliance
Conducted Emissions
Radiated Emissions
Static Discharge Immunity
Radiated RF Immunity
EFT/Burst Immunity
Line Surge Immunity
Conducted RF Immunity
Power Frequency Magnetic Field Immunity
Voltage Dip Immunity
Line Harmonic Emissions
Flicker Test
EN55011/22 Class B, FCC Part 15, Subpart B, Class B
EN55011/22 Class A; FCC Part 15, Subpart A, Class A w/6db margin
EN61000-4-2, 6kV Contact Discharge, 8kV air discharge
EN61000-4-3, 3V/m.
EN61000-4-4, 2kV/5kHz
EN61000-4-5, 1kV differential, 2kV common-mode
EN61000-4-6, 3Vrms
EN61000-4-8, 3A/m
EN61000-4-11, 0% Vin, 0.5cycle; 40% Vin, 5 cycles; 70% Vin, 25 cycles
EN61000-3-2, Class A, B, C, & D
EN61000-3-3, Complies (dmax<6%)
Mechanical Drawing
Notes:
1. All dimensions in inches (mm), tolerance is +/-0.02”.
2. Mounting holes should be grounded for EMI purposes.
3. FG is safety ground connection.
4. The power supply requires mounting on metal standoffs 0.20” (5mm) in height, min.
Connector Information
Input Connector
PIN 1) AC LINE
PIN 2) EMPTY
PIN 3) AC NEUTRAL
Mating Connector:
Molex 09-50-3031
Pins= 08-52-0072
Ground
0.250” FASTON TAB
DC Output
Connector
Term. 1: +Vout
Term. 2: -Vout
Mating Connector:
Molex 19141-
0058/0063/0083
Fan Output
Connector
PIN 1) +12Vfan RTN
PIN 2) +12V fan
Mating Connector:
Molex 22-01-3027
Pins: 08-50-0114
Signal Connector
PIN 1) Remote Sense (+)
PIN 2) Common
PIN 3) Remote Sense (-)
PIN 4) Current Share
PIN 5) Inhibit
Mating Connector:
Molex 90142-0010
Pins: 90119-2109 or 2120
Pin 6) Common
Pin 7) Power Good
Pin 8) +5Vsb
Pin 9) DC OK
Pin 10) +5Vsb RTN
Mating Connector:
Molex 01-90020001
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MINT1275 REV 1.6, 22-Jan-14
3
MINT1275
275W Single Output
Medical Series
Fan Output – J301
J301 provides a 12V@1A output to support a system cooling fan.
AC Power Failure/DC OK, Current Shaare and Inhibit Signals – J201
2.
Inhibit
Remote inhibit control of the DC output.
J201 pin 5 open
J201 pin 5 LOW or GND
=
ON
=
OFF
3.
Current Sharing/Remote Sense
J302
J303
Power Supply 1
J201 pin 1
J201 pin 3
J201 pin 4
J302
Vo+
Vo-
The outputs of N+1 (N=1,2…5) models can be shared. It is shown in Figure 3, one
load-share controller is required for each model and circuits are identical when
N+ 1 identical models are used.
Terminals J302 and J303 are connected to the Vo+ and Vo-, respectively, of the
first power model. The Vo+ and Vo- correspond to the other models positive and
negative output pins. The Vo+ connects to positive output bus to the load and Vo-
connects the negative output bus to the load.
The J201 pin1 and pin3 connects to the S+ and S-, respectively, of the first power
models. The S+ and S- correspond to the other models J201 pin1 and pin3. The
S+ connects to positive output bus and S- connects to negative output bus.
Remote Sense < 250mV drop compensation:
The J201 Pin4 connects to current sharing bus that it connects to
other models J201 pin4.
S+
S-
J303
Power Supply 2
J201 pin 1
J201 pin 3
J201 pin 4
J302
J303
Power Supply 3
J201 pin 1
J201 pin 3
J201 pin 4
Current Sharing Bus
S+
S-
S+
S-
Load -
Load +
Figure 3: Current Share Method
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MINT1275 REV 1.6, 22-Jan-14
4
MINT1275
275W Single Output
Medical Series
Timing Sequence
Isolation Specifications
Parameter
Insulation Safety Rating
Conditions/Description
Input/Ground
Input/Output
Output/Ground
Input/Ground
Input/Output
Output/Ground
Min
Nom
Max
Units
Basic (1 MOPP)
Reinforced (2 MOPP)
Operational
1800
4000
1500
-
-
Vac
Vac
Vac
Electric Strength Test Voltage
Input Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Input Voltage
Turn-On Input Voltage
Turn-Off Input Voltage
Input Frequency
Inrush Current Limitation
Power Factor
Conditions/Description
Ramping up
Ramping down
Min
90
Nom
115/230
80
75
Max
264
Units
Vac
Vac
Vac
47
264Vac, cold start
Vi
nom,
Io
nom
Vi
nom,
Io
nom
MINT1275A1214K01
MINT1275A1514K01
MINT1275A2414K01
MINT1275A4814K01
MINT1275A5614K01
-
0.9
50/60
-
-
63
50
-
Hz
A
Efficiency
-
92%
-
%
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MINT1275 REV 1.6, 22-Jan-14
5
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