Model Selection Guide
www.micropowerdirect.com
Capaci-
Input
Output
Over
Fuse Rating
Model
Number
Efficiency
(%, Typ)
tive
Load
(µF Max)
1,000
Voltage
Protection
(VDC)
Voltage (VDC)
Current (mA)
Slow-Blow
(mA)
Voltage Current
Current
(VDC) (mA, Max) (mA, Min)
Nominal
Range Full-Load No-Load
F2501RU
F2502RU
F2503RU
F2504RU
F2505RU
F2506RU
F2511RU
F2512RU
F2513RU
F2514RU
F2515RU
F2516RU
24
24
24
24
24
24
48
48
48
48
48
48
10.0 - 40.0
10.0 - 40.0
10.0 - 40.0
10.0 - 40.0
10.0 - 40.0
10.0 - 40.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
922
1,225
1,404
1,404
1,404
1,404
461
20
20
20
20
20
20
10
10
10
10
10
10
3.3
5.0
5,500
5,000
2,500
2,000
1,250
1,000
5,500
5,000
2,500
2,000
1,250
1,000
400.0
350.0
166.0
133.0
83.0
3.9
6.8
82
85
89
89
89
89
82
85
89
89
89
89
5,000
5,000
5,000
5,000
5,000
5,000
3,000
3,000
3,000
3,000
3,000
3,000
1,000
1,000
1,000
330
12.0
15.0
12.0
15.0
3.3
15.0
18.0
15.0
18.0
3.9
65.0
330
400.0
350.0
166.0
133.0
83.0
1,000
1,000
1,000
1,000
330
613
702
5.0
6.8
12.0
15.0
12.0
15.0
15.0
18.0
15.0
18.0
702
702
702
65.0
330
Notes:
For Heatsink Option, add suffix “H” to model number (i.e. F2503RU-H)
0. When measuring output ripple,it is recommended that an external 0.± 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 4.7 µF capacitors will reduce the output ripple. The maximum Mechanical Dimensions
rms value of the output ripple is 0± mV.
2. Transient recovery is measured to within a 0% error band for a load step change of 75% to 0±±%.
3. The maximum sink current at the on/off pin (pin 4) during a logic low is 0±± µA. The maximum allowable
leakage current of a switch connected to the on/off pin (Pin 4) at logic high (2.5V to 0±±V) is 5 µA. If the on/
off pin (Pin 4) is left open, the unit operates. If it is grounded, the unit will shut off.
4. Operation at no-load will not damage these units. However, they may not meet all specifications.
5. Dual output units may be connected to provide a 24 VDC or 3± VDC output. To do this, connect the load
across the positive (+Vout) and negative (-Vout) outputs and float the output common.
6. 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 Equivalent Series Resistance (ESR <0.±⍀ at 0±± kHz) capacitor
be mounted close to the converter.A 33 µF is recommended for 24V input models and a 0± µF for 48V units.
7. 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.
External Trim
A simple external circuit may be used to adjust
the converter output. To adjust the output DOWN,
connect a 5%, 3W resistor between the plus output
pin and the Vout trim pin. To adjust the output UP,
connect a 5%, 3W resistor between the minus
Mechanical Notes:
• All dimensions are typical
in inches (mm)
output pin and the Vout trim pin. To calculate the
correct resistor value use:
Pin Connections
Pin Single
Dual
+Vin
-Vin
Pin Single
Dual
• Tolerance x.xx = ±±.±0 (±±.25)
(33 x Vout) - (3± x Vadj)
Vadj - Vout
1
2
4
5
+Vin
-Vin
6
7
8
+Vout Comm.
-Vout
Trim
UP
Radj =
-Vout
Trim
ON/OFF ON/OFF
No Pin +Vout
(36.667 x Vout) - (33 x Vout)
Vout - Vadj
Down Radj =
Heatsink Dimensions (Optional)
For UP/Down trimming capability, connect a 0±
kW potentiometer between the plus and minus
outputs with the wiper arm connected to the
Vout trim pin.
Derating Curves
Heatsink Notes:
• Use of the heatsink will extend the units operating temperature
range by approximately 0±°C.
• The heatsink is black anodized aluminum.
MicroPower Direct
We Power Your Success - For Less!
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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