lf311ru MicroPower Direct, LLC, lf311ru Datasheet - Page 2

• Manufacturer Part Number: lf311ru
• Description: Very Wide Input, 3w Smt Single & Dual Output Dc/dc Converters
• Manufacturer: MicroPower Direct, LLC

Model Selection Guide
Notes:
1. When measuring output ripple, it is recommended that an external 0.47 µF ceramic
2. Transient recovery is measured to within a 1% error band for a load step change of 75%
3. No-load operation will not damage these units, however, they may not meet specifi ca-
4. Dual output units may provide a 10V, 24V or 30V output. To do this, connect the load
5. The converter should be connected to a low ac-impedance source. An input source with
6. Maximum capacitive load for single output units is 3,000 µF, for dual output models it is
7. It is recommended that a fuse be used on the input of a power supply for protection. See
Mechanical Dimensions
Notes:
•
•
•
Model
Number
LF301RU
LF302RU
LF303RU
LF304RU
LF305RU
LF306RU
LF307RU
LF311RU
LF312RU
LF313RU
LF314RU
LF315RU
LF316RU
LF317RU
All dimensions are typical in
Tolerance x.xx =
Pin 1 is marked by a “dot” or indentation on the unit
inches (mm)
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.
to 100%.
tions.
across the positive (+Vout) and negative (-Vout) outputs and fl oat the output common.
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 24V input units a 4.7 µF is recommended, and for 48V units a 2.2 µF.
180 µF for each output.
the table above for the correct rating.
Nominal
±
0.01 (
24
24
24
24
24
24
24
48
48
48
48
48
48
48
Voltage (VDC)
292 Page Street Ste D Stoughton, MA 02072
MicroPower Direct
±
0.25)
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
Range
Input
www.micropowerdirect.com
Full-Load
138
158
154
154
160
154
154
68
78
75
75
78
75
75
Current (mA)
No-Load
20
20
20
20
20
20
20
10
10
10
10
10
10
10
±12.0
±15.0
±12.0
±15.0
Voltage
•
12.0
15.0
±5.0
12.0
15.0
±5.0
(VDC)
3.3
5.0
3.3
5.0
TEL: [phone]
(mA, Max)
Derating Curve
Current
Output
Board Layout
±300
±125
±100
±300
±125
±100
750
600
250
200
750
600
250
200
Remote ON/OFF
Remote ON/OFF Notes:
1. Maximum sink current at the on/off pin (pin 1) during a logic
2. Maximum allowable leakage current of a switch connected to the
Parameter
Supply On
Supply Off
Standby Input Current
Control Common
low is 300 µA.
on/off terminal (Pin 1) at logic high (2.5V to 100V) is 200 µA.
•
(mA, Min)
Current
±30.0
±12.5
±10.0
±30.0
±12.5
±10.0
FAX: [phone]
75.0
60.0
25.0
27.0
75.0
60.0
25.0
27.0
Ripple Cur.
Refl ected
(mA)
10
10
10
10
10
10
10
5
5
5
5
5
5
5
Referenced to Negative Input (-Vin)
2.5 to 5.5 or Open Circuit
•
Effi ciency
E-Mail: [e-mail]
(%, Typ)
Pin Connections
NC: No Connection
75
79
81
81
78
81
81
76
80
83
83
80
83
83
-0.7 to 0.8
Condition
Pin
10
11
12
13
14
15
22
23
24
1
2
3
10
Fuse Rating
Slow-Blow
On/Off
Single
+Vout
-Vout
+Vin
+Vin
-Vin
-Vin
NC
NC
NC
NC
NC
1,000
1,000
1,000
1,000
1,000
1,000
1,000
(mA)
500
500
500
500
500
500
500
Common
Common
On/Off
+Vout
-Vout
Dual
+Vin
+Vin
-Vin
-Vin
NC
NC
NC
Units
VDC
VDC
mA