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LF303RU 数据表(PDF) 2 Page - MicroPower Direct, LLC

部件名 LF303RU
功能描述  Very Wide Input, 3W SMT Single & Dual Output DC/DC Converters
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制造商  MPD [MicroPower Direct, LLC]
网页  http://www.micropowerdirect.com
标志 MPD - MicroPower Direct, LLC

LF303RU 数据表(HTML) 2 Page - MicroPower Direct, LLC

  LF303RU Datasheet HTML 1Page - MicroPower Direct, LLC LF303RU Datasheet HTML 2Page - MicroPower Direct, LLC  
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background image
Derating Curve
Board Layout
Pin Connections
Pin
Single
Dual
1
-Vin
-Vin
2
-Vin
-Vin
3
On/Off
On/Off
10
NC
Common
11
NC
NC
12
NC
-Vout
13
+Vout
+Vout
14
NC
NC
15
-Vout
Common
22
NC
NC
23
+Vin
+Vin
24
+Vin
+Vin
NC: No Connection
Model
Number
Input
Output
Reflected
Ripple Cur.
(mA)
Efficiency
(%, Typ)
Fuse Rating
Slow-Blow
(mA)
Voltage (VDC)
Current (mA)
Voltage
(VDC)
Current
(mA, Max)
Current
(mA, Min)
Nominal
Range
Full-Load
No-Load
LF301RU
24
9.0 - 36.0
138
20
3.3
750
75.0
10
75
1,000
LF302RU
24
9.0 - 36.0
158
20
5.0
600
60.0
10
79
1,000
LF303RU
24
9.0 - 36.0
154
20
12.0
250
25.0
10
81
1,000
LF304RU
24
9.0 - 36.0
154
20
15.0
200
27.0
10
81
1,000
LF305RU
24
9.0 - 36.0
160
20
±5.0
±300
±30.0
10
78
1,000
LF306RU
24
9.0 - 36.0
154
20
±12.0
±125
±12.5
10
81
1,000
LF307RU
24
9.0 - 36.0
154
20
±15.0
±100
±10.0
10
81
1,000
LF311RU
48
18.0 - 75.0
68
10
3.3
750
75.0
5
76
500
LF312RU
48
18.0 - 75.0
78
10
5.0
600
60.0
5
80
500
LF313RU
48
18.0 - 75.0
75
10
12.0
250
25.0
5
83
500
LF314RU
48
18.0 - 75.0
75
10
15.0
200
27.0
5
83
500
LF315RU
48
18.0 - 75.0
78
10
±5.0
±300
±30.0
5
80
500
LF316RU
48
18.0 - 75.0
75
10
±12.0
±125
±12.5
5
83
500
LF317RU
48
18.0 - 75.0
75
10
±15.0
±100
±10.0
5
83
500
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
Model Selection Guide
Mechanical Dimensions
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 specifica-
tions.
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 24V input units a 4.7
µF is recommended, and for 48V units a 2.2 µF.
6. Maximum capacitive load for single output units is 3,000
µF, for dual output models it is
180
µF for each output.
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.
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 connected to the
on/off terminal (Pin 1) at logic high (2.5V to 100V) is 200
µA.
Parameter
Condition
Units
Supply On
2.5 to 5.5 or Open Circuit
VDC
Supply Off
-0.7 to 0.8
VDC
Standby Input Current
10
mA
Control Common
Referenced to Negative Input (-Vin)
Remote ON/OFF
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


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