LF300RW
Series
Wide Input, 3W SMT
Single & Dual Output
DC/DC Converters
Electrical Specifications
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Key Features:
•
3W Output Power
•
UL Approved
(File E245422)
•
Wide 2:1 Inputs
•
Miniature SMT Case
•
Tight Line/Load Regulation
•
1,500 VDC Isolation
•
-40ºC to +70ºC Operation
•
21 Standard Models
•
1.0 MH MTBF Minimum
•
Industry Standard Pin-Out
Input
Parameter
Input Start Voltage
Reverse Polarity Input Current
Short Circuit Input Power
Input Filter
Conditions
12 VDC Input
24 VDC Input
48 VDC Input
Min.
4.5
8.0
16.0
Typ.
6.0
12.0
24.0
Max.
8.0
16.0
32.0
0.5
1,500
Units
VDC
A
mW
π
(Pi) Filter
Conditions
Dual Output, Balanced Load
For Vin = Min to Max
Iout = 20% to 100%
Min.
Typ.
±0.5
±0.5
±0.1
±0.3
50
Max.
±1.0
±1.0
±0.3
±1.0
75
100
10
500
±6.0
±0.02
Units
%
%
%
%
mV P - P
mV P - P
mV rms
%
μS
%
%/
º
C
Output
Parameter
Output Voltage Accuracy
Output Voltage Accuracy
Line Regulation
Load Regulation
Ripple & Noise (20 MHz) (Note 1)
Ripple & Noise (20 MHz)
Ripple & Noise (20 MHz)
Output Power Protection
Transient Response Time (Note 2)
Transient Response Deviation
Temperature Coefficient
Output Short Circuit
120
25% Load Step Change
Continuous
Conditions
60 Seconds
1,000 VDC
100 kHz, 1V
Min.
1,500
1,000
Typ.
Max.
250
±2.0
±0.01
General
RoHS Compliant
Parameter
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Switching Frequency
65
300
100
Units
VDC
MΩ
pF
kHz
Units
º
C
º
C
º
C
%
Environmental
Parameter
Operating Temperature Range
Operating Temperature Range
Storage Temperature Range
Cooling
Humidity
Conditions
Min.
Typ.
-40
+25
-40
+25
-40
Free Air Convection
RH, Non-condensing
Ambient
Case
Max.
+71
+90
+125
95
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
Physical
Case Size
Case Material
Weight
1.27 x 0.74 x 0.40 Inches (32.3 x 28.8 x 10.2 mm)
Non-Conductive Black Plastic (UL94-V0)
0.35 Oz (10g)
Conditions
Min.
Typ.
1.0
MIL HDBK 217F, 25
º
C, Gnd Benign
UL 1950, EN 60950, IEC 60950
UL, cUL; File No. E245422
Conditions
12 VDC Input
24 VDC Input
48 VDC Input
1.5 mm From Case For 10 Sec.
All Models
Min.
-0.7
-0.7
-0.7
Typ.
Max.
Units
MHours
Reliability Specifications
Parameter
MTBF
Safety Standards
Safety Approvals
Absolute Maximum Ratings
Parameter
Input Voltage Surge (1 Sec)
Lead Temperature
Internal Power Dissipation
Max.
25.0
50.0
100.0
260
2500
Units
VDC
ºC
mW
Caution: Exceeding Absolute Maximum Ratings may damage the module. These are not continuous operating ratings.
Model Selection Guide
Model
Number
LF301RW
LF302RW
LF303RW
LF304RW
LF305RW
LF306RW
LF307RW
LF311RW
LF312RW
LF313RW
LF314RW
LF315RW
LF316RW
LF317RW
LF321RW
LF322RW
LF323RW
LF324RW
LF325RW
LF326RW
LF327RW
Voltage (VDC)
Nominal
12
12
12
12
12
12
12
24
24
24
24
24
24
24
48
48
48
48
48
48
48
Range
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
Efficiency
Reflected
Voltage Current
Current
(%, Typ)
Ripple
(VDC) (mA, Max) (mA, Min)
Full-Load No-Load
(mA, Typ)
257
20
25
3.3
700.0
70.0
75
316
20
25
5.0
600.0
60.0
79
305
20
25
12.0
250.0
25.0
82
305
20
25
15.0
200.0
20.0
82
321
20
25
±5.0
±300.0
±30.0
78
309
20
25
±12.0
±125.0
±12.5
81
309
20
25
±15.0
±100.0
±10.0
81
127
5
15
3.3
700.0
70.0
76
156
5
15
5.0
600.0
60.0
80
151
5
15
12.0
250.0
25.0
83
151
5
15
15.0
200.0
20.0
83
158
5
15
±5.0
±300.0
±30.0
79
152
5
15
±12.0
±125.0
±12.5
82
152
5
15
±15.0
±100.0
±10.0
82
63
3
10
3.3
700.0
70.0
76
78
3
10
5.0
600.0
60.0
80
75
3
10
12.0
250.0
25.0
83
75
3
10
15.0
200.0
20.0
83
79
3
10
±5.0
±300.0
±30.0
79
79
3
10
±12.0
±125.0
±12.5
82
76
3
10
±15.0
±100.0
±10.0
82
Input
Current (mA)
Output
Fuse Rating
Slow-Blow
(mA)
750
750
750
750
750
750
750
350
350
350
350
350
350
350
200
200
200
200
200
200
200
Notes:
1. When measuring output ripple, it is recommended that an external 0.47
μF
ceramic
capacitor be placed from the +Vout pin to the -Vout pin for single output units and
from each output to common for dual output units. For noise sensitive applications,
the use of 3.3
μF
capacitors will reduce the output ripple.
2. Transient recovery is measured to within a 1% error band for a load step change
of 75% to 100%.
3. Operation at no-load will not damage these units. However, they may not meet all
specifications.
4. Dual output units may be connected to provide a 24 VDC or 30 VDC output. To do
this, connect the load across the positive (+Vout) and negative (-Vout) outputs and
float the output common.
5. The converter should be connected to a low ac-impedance source. An input source
with a highly inductive impedance may affect the stability of the converter. In ap-
plications where the converter output loading is high and input power is supplied
over long lines, it may be necessary to use a capacitor on the input to insure start-
up.
In this case, it is recommended that a low ESR (ESR <1.0Ω at 100 kHz) capacitor be
mounted close to the converter. For 12V input units a 3.3
μF
is recommended, and
for 24V & 48V units a 1.5
μF.
6. It is recommended that a fuse be used on the input of a power supply for protec-
tion. See the table above for the correct rating.
Derating Curve
Capacitive Load
Single Output
μF
Max
4,700
Dual Output
μF
Max
±180
Pin Connections
Pin
1
2
3
10
11
12
13
14
15
22
23
24
Single
-Vin
-Vin
NC
NC
NC
NC
+Vout
NC
-Vout
NC
+Vin
+Vin
Dual
-Vin
-Vin
NC
Common
NC
-Vout
+Vout
NC
Common
NC
+Vin
+Vin
Mechanical Dimensions
Board Layout
NC:
No Connection
Notes:
•
All dimensions are typical in inches (mm)
•
Tolerance x.xx =
±
0.01 (
±
0.25)
•
Pin 1 is marked by a “dot” or indentation on the unit
MicroPower Direct
www.micropowerdirect.com
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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