Model Selection Guide
Model
Number
LF501RW
LF502RW
LF503RW
LF504RW
LF505RW
LF506RW
LF507RW
LF511RW
LF512RW
LF513RW
LF514RW
LF515RW
LF516RW
LF517RW
LF521RW
LF522RW
LF523RW
LF524RW
LF525RW
LF526RW
LF527RW
Input
Voltage (VDC)
Nominal
Range
12
9.0 - 18.0
12
9.0 - 18.0
12
9.0 - 18.0
12
9.0 - 18.0
12
9.0 - 18.0
12
9.0 - 18.0
12
9.0 - 18.0
24
18.0 - 36.0
24
18.0 - 36.0
24
18.0 - 36.0
24
18.0 - 36.0
24
18.0 - 36.0
24
18.0 - 36.0
24
18.0 - 36.0
48
36.0 - 75.0
48
36.0 - 75.0
48
36.0 - 75.0
48
36.0 - 75.0
48
36.0 - 75.0
48
36.0 - 75.0
48
36.0 - 75.0
Current (mA)
Full-Load
No-Load
434
20
521
20
502
20
502
20
521
20
501
20
503
20
212
5
254
5
245
5
245
5
254
5
245
5
246
5
106
3
127
3
123
3
122
3
127
3
122
3
123
3
Voltage
(VDC)
3.3
5.0
12.0
15.0
±5.0
±12.0
±15.0
3.3
5.0
12.0
15.0
±5.0
±12.0
±15.0
3.3
5.0
12.0
15.0
±5.0
±12.0
±15.0
Output
Current
(mA, Max)
1,200
1,000
417
333
±500
±208
±167
1,200
1,000
417
333
±500
±208
±167
1,200
1,000
417
333
±500
±208
±167
Current
(mA, Min)
120.0
100.0
41.7
33.3
±50.0
±20.8
±16.7
120.0
100.0
41.7
33.3
±50.0
±20.8
±16.7
120.0
100.0
41.7
33.3
±50.0
±20.8
±16.7
Reflected
Ripple Cur.
(mA)
Efficiency
(%, Typ)
76
80
83
83
80
83
83
78
82
85
85
82
85
85
78
82
85
85
82
85
85
25
25
25
25
25
25
25
15
15
15
15
15
15
15
10
10
10
10
10
10
10
Fuse Rating
Slow-Blow
(mA)
1,500
1,500
1,500
1,500
1,500
1,500
1,500
700
700
700
700
700
700
700
350
350
350
350
350
350
350
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. No-load operation will not damage these units, however, they may not meet specifications.
4. Dual output units may provide a 10V, 24V or 30V 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 applications 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 4.7
µF
is recommended, and for 24V & 48V units a 2.2
µF.
6. It is recommended that a fuse be used on the input of a power supply for protection. See the
table above for the correct rating.
Derating Curve
Remote ON/OFF
Parameter
Supply On
Supply Off
Standby Input Current
Control Common
Condition
Units
2.5 to 5.5 or Open Circuit
VDC
-0.7 to 0.8
VDC
10
mA
Referenced to Negative Input (-Vin)
Mechanical Dimensions
Remote ON/OFF Notes:
1. Maximum sink current at the
on/off pin (pin 1) during a
logic low is 300
µA.
2. Maximum allowable leakage
current of a switch connect-
ed to the on/off terminal
(Pin 1) at logic high (2.5V to
100V) is 200
µA.
Capacitive
Load
Single
Output
(Max)
680
µ
F
Dual
Output
(Max)
100
µ
F
Pin Connections
Pin
1
2
3
9
10
11
12
13
14
15
16
22
23
24
Single
Dual
On/Off On/Off
-Vin
-Vin
-Vin
-Vin
NC
Common
NC
NC
NC
-Vout
NC
NC
NC
NC
+Vout
+Vout
NC
NC
-Vout Common
+Vin
+Vin
+Vin
+Vin
NC
NC
Board Layout
NC:
No Connection
MicroPower Direct
www.micropowerdirect.com
•
292 Page Street Ste D Stoughton, MA 02072
TEL: (781) 344-8226
•
Notes:
dimens
•
All dimensions are typical in inches (mm)
•
Tolerance x
x.xx =
±
0.01 (
±
0.25)
•
Pin 1 is ma
marked by a “dot” or indentation
on the uni
unit
FAX: (781) 344-8481
•
E-Mail: sales@micropowerdirect.com
MPD [ MICROPOWER DIRECT, LLC ]
