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LF124D View Datasheet(PDF) - MicroPower Direct, LLC

Part NameDescriptionManufacturer
LF124D Ultra-Miniature, 1W Dual Output SMT DC/DC Converters MPD
MicroPower Direct, LLC MPD
LF124D Datasheet PDF : 4 Pages
1 2 3 4
Model Selection Guide
Model
Number
LF101D
LF102D
LF103D
LF104D
LF111D
LF112D
LF113D
LF114D
LF121D
LF122D
LF123D
LF124D
Input
Output
Load
Voltage (VDC)
Current (mA) Voltage Current Current Regulation
Nominal Range Full-Load No-Load (VDC) (mA, Max) (mA, Min) (%, Max)
5
4.5 - 5.5
267
30
±5.0 ±100.0
±2.0
10
5
4.5 - 5.5
260
30
±9.0
±55.0
±1.0
10
5
4.5 - 5.5
255
30 ±12.0
±42.0
±0.8
8
5
4.5 - 5.5
251
30 ±15.0
±33.0
±0.7
7
12 10.8 - 13.2 111
15
±5.0 ±100.0
±2.0
8
12 10.8 - 13.2 109
15
±9.0
±55.0
±1.0
8
12 10.8 - 13.2 105
15 ±12.0
±42.0
±0.8
5
12 10.8 - 13.2 103
15 ±15.0
±33.0
±0.7
5
24 21.6 - 26.4 56
9
±5.0 ±100.0
±2.0
8
24 21.6 - 26.4 55
9
±9.0
±55.0
±1.0
8
24 21.6 - 26.4 53
9
±12.0
±42.0
±0.8
5
24 21.6 - 26.4 52
9
±15.0
±33.0
±0.7
5
Efficiency
(%, Typ)
75
76
79
79
75
76
80
80
74
75
79
79
Fuse Rating
Slow-Blow
(mA)
500
500
500
500
200
200
200
200
100
100
100
100
Notes:
1. Load regulation is measured for an output change of 20% to 100%.
2. When measuring output ripple, it is recommended that an external
0.33 μF ceramic capacitor be placed from each output to common. For
noise sensitive applications, the use of 0.47 μF capacitors will reduce
the output ripple.
3. Operation at no-load will not damage these units. However, they may
not meet all specifications.
4. 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 5V input units a 2.2 μF
is recommended, for 12V input units, a 1.0 μF, and for 24V input units,
a 0.47 μF.
5. The outputs of these units may be connected to provide a 10 VDC, 18
VDC, 24 VDC or 30 VDC output. To do this, connect the load across
the positive (+Vout) and negative (-Vout) outputs and float the ouput
common.
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.
Board Layout
Derating Curve
Capacitive Load
μF Max
33
Pin Connections
Pin Description
Pin
1
-Vin
6
2
+Vin
7
3
NA
8
4 Common
9
5
-Vout
10
Description
NA
+Vout
NA
NA
NA
MicroPower Direct
www.micropowerdirect.com
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