ML300ERW
Series
Low Cost, 3W SMT
2:1 Input Range
DC/DC Converters
Electrical Specifications
Key Features:
•
3W Output Power
•
2:1 Input Voltage Range
•
1,500 VDC Isolation
•
Compact SMT Case
•
Nine Standard Models
•
Short Circuit Protected
•
-40°C to +85°C Operation
•
Available On Tape/Reel
•
Low Cost
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Input
Parameter
Input Voltage Range
Input Start Voltage
Input Filter
Reflected Ripple Current
Conditions
Min.
12 VDC Input
9.0
24 VDC Input 18.0
48 VDC Input 36.0
12 VDC Input
4.5
24 VDC Input 11.0
48 VDC Input 24.0
(Pi)
Filter
Typ.
12.0
24.0
48.0
8.0
16.0
33.0
30
Max.
18.0
36.0
75.0
9.0
18.0
36.0
Units
VDC
VDC
mA
Max.
±3.0
±0.4
±0.75
35
60
1.0
±5.0
±0.03
Units
%
%
%
mV P - P
mV P - P
mSec
%
%/°C
Output
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Ripple (20 MHz)
Noise (20 MHz)
Transient Recovery Time, See Note 2
Transient Response Deviation
Temperature Coefficient
Output Short Circuit, See Note 3
Conditions
Typ.
±1.0
V
IN
= Min to Max
±0.2
I
OUT
= 5% to 100%
±0.2
See Note 1
20
See Note 1
45
0.5
25% Load Step Change
±2.0
±0.02
Continuous (Autorecovery)
Min.
1,500
1,000
Typ.
Min.
General
Parameter
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Switching Frequency
Conditions
60 Seconds
500 VDC
100 kHz, 0.1V
Max.
Units
VDC
M
pF
kHz
Units
°C
°C
%
1,000
350
Max.
+85
+125
95
Environmental
Parameter
Operating Temperature Range
Storage Temperature Range
Cooling
Humidity
Physical
Case Size
Case Material
Weight
Conditions
Min.
Typ.
Ambient
-40
+25
-55
Free Air Convection
RH, Non-condensing
MicroPower Direct
292 Page Street
Suite D
Stoughton, MA 02072
USA
T:
(781) 344-8226
F:
(781) 344-8481
E:
sales@micropowerdirect.com
W:
www.micropowerdirect.com
See Mechanical Drawing (Page 4)
Non-Conductive Black Plastic (UL94-V0)
0.183 Oz (5.2g)
Conditions
MIL HDBK 217F, 25°C, Gnd Benign
Conditions
12 VDC Input
24 VDC Input
48 VDC Input
1.5 mm From Case for 10 Sec
Min.
1.0
Min.
-0.7
-0.7
-0.7
Typ.
Max.
Units
MHours
Units
VDC
°C
°C
Reliability Specifications
Parameter
MTBF
Absolute Maximum Ratings
Parameter
Input Voltage Surge (1 Sec)
Peak Reflow Temperature
Lead Temperature
Typ.
Max.
25.0
50.0
100.0
240
300
Caution: Exceeding Absolute Maximum Ratings may damage the module. These are not continuous operating ratings.
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Model Selection Guide
Input
Model
Number
ML312S-05ERW
ML312S-12ERW
ML312S-15ERW
ML324S-05ERW
ML324S-12ERW
ML324S-15ERW
ML348S-05ERW
ML348S-12ERW
ML348S-15ERW
Voltage
(VDC)
Nominal
12
12
12
24
24
24
48
48
48
Range
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
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Fuse
Efficiency Capacitive
Rating
Current (mA)
Load
Voltage Current
Current
(%, Typ)
(µF, Max) Slow-Blow
(VDC) (mA, Max) (mA, Min)
(mA)
Full-Load No-Load
333
325
316
164
154
156
81
78
78
22
22
22
12
12
12
8
8
8
5.0
12.0
15.0
5.0
12.0
15.0
5.0
12.0
15.0
600
250
200
600
250
200
600
250
200
30
12
10
30
12
10
30
12
10
75
77
79
76
81
80
77
80
80
3,300
1,800
1,000
3,300
1,800
1,000
3,300
1,800
1,000
600
600
600
300
300
300
150
150
150
Output
Notes:
1. When measuring output ripple & noise, it is recommended
that an external ceramic capacitor (approx
10 µF) be placed from the +V
OUT
to the -V
OUT
pins.
2. Transient recovery is measured to within a 1% error
band for a load step change of 25%.
3. Short circuit protection is provided by a “hiccup mode”
circuit.
4, These units should not be operated with a load under 5% of
full load. Operation at no-load will not damage the unit, but
they may not meet all specifications.
5. The recommended reflow settings are a peak temperature
of 245 °C for a maximum period (T
PK
) of 10S and a time
above liquidous (T
L
) of <60 seconds at 217 °C. A sug-
gested temperature profile is shown on page four. For more
information, please contact the factory.
6. It is recommended that a fuse be used on the input of a
power supply for protection. See the Model Selection table
above for the correct rating.
Efficiency vs Input Voltage
24 VDC Input
Efficiency vs Output Load
24 VDC Input
Efficiency vs Input Voltage
48 VDC Input
Efficiency vs Output Load
48 VDC Input
292 Page Street Ste D Stoughton, MA 02072
•
TEL: (781) 344-8226
•
FAX: (781) 344-8481
•
E-Mail: sales@micropowerdirect.com
EMC Specifications
Parameter
Radiated Emissions
Conducted Emissions
ESD
RS
EFT
Surge
CS
Voltage Dips
Standard
See Note 1
EN 55022
See Note 1
EN 55022
EN 61000-4-2
EN 61000-4-3
See Note 2
EN 61000-4-4
See Note 3
EN 61000-4-5
EN 61000-4-6
EN 61000-4-29
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Class A
Class A
Criteria B; ±4 kV Contact
Criteria A; 10V/m
Criteria B; ±2 kV
Criteria B; ±2 kV
Criteria A; 3 Vrms
Criteria B; 0% - 70%
Notes:
1. All units are rated for EN 55022 (CE/RE) class A without external components.
They will meet class B with the addition of the
MDCFM-0x
(or a similar discrete
filter circuit). Contact the factory for more information.
2. To meet the requirements of EN 61000-4-4 (±2 kV or
±4
kV), external com-
ponents are needed. This can be done discretely, or with the addition of the
MDCFM-0x.
Contact the factory for more information.
3. To meet the requirements of EN 61000-4-5 (±2 kV), external components are
needed. This can be done discretely, or with the addition of the
MDCFM-0x.
Contact the factory for more information.
Typical Connection
The diagram above illustrates a typical connection of the
ML300ERW
series 5. Recommended values for components are:
7. In many applications simply adding input/output capacitors will
for applications that require meeting EMC standards. The units do not require
enhance the input surge pro-
Component
24 V
IN
48 V
IN
12 V
IN
Vin
Input
Vout
Output
external components to operate as specified. Some notes on this diagram
tection and reduce output
(VDC)
Capacitor
(VDC)
Capacitor
MOV
---
10D560
10D101
(starting with the input circuit) are:
ripple sufficiently. The input
12
5.0
100
µF
10
µF
L
1
---
56
µH
56
µH
1. It is recommended that an external fuse be used. The recommended fuse
capacitor C
1
and output cap-
24
12
10 - 47
µF
10
µF
acitor C
4
shown in the typical
is shown in the model chart on page 2.
TVS
SMCJ28A
SMCJ48A
SMCJ90A
connection diagram above
2. An external MOV is recommended on the input to protect the unit in the
48
15
10 - 47
µF
10
µF
C
1
680
µF/25V
120
µF/50V
120
µF/100V
(and board layout drawing
event of a surge. A recommended value is given in the table at right.
C
2
4.7
µF/50V
4.7
µF/50V
4.7
µF/100V
below) illustrate their connection. Recommended capacitor values are
3. An external TVS is recommended on the input to protect the unit in the
L
2
4.7
µH
4.7
µH
given in the table at right.
event of a voltage spike. A recommended value is given in the table at
C
3
4.7
µF/50V
4.7
µF/50V
4.7
µF/100V
right.
4. The output filtering capacitor (C
4
) is a high frequency, low resistance
C
4
10
µF
10
µF
10
µF
electrolytic capacitor. Care must be taken in choosing this capacitor not
to exceed the capacitive load specification for the unit. The board layout 6. Input noise and surge suppression modules are available for a
number of
MPD
DC/DC power supplies. For pricing or full techni-
illustration below shows a connection for dual output units. Voltage derating
cal information on these modules please contact the factory.
of capacitors should be 80% or above.
Typical Board Layout
: With External Filter/Surge Components
Typical Connection
: With External Filter Module MDCFM-0x
For 12V and 24V input models, the value of C
1
should be a 330
µF/50V.
For 48V input models, the value of C
1
should be a 330
µF/100V.
For more information on the
MDCFM-0x,
please contact the factory.
MicroPower Direct
•
292 Page Street Ste D Stoughton, MA 02072
•
TEL: (781) 344-8226
•
FAX: (781) 344-8481
•
E-Mail: sales@micropowerdirect.com
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