URF_LP-20W SERIES
20W,WIDE
INPUT, HIGH ISOLATED & REGULATED
SINGLE OUTPUT DC-DC CONVERTER
FEATURES
●
Efficiency up to 89%
●
4:1 wide input voltage range
●
Low temperature rise
●
Short circuit protection
●
3KVAC isolation
●
Operating temperature range:
-40°C ~ +85°C
●
Industry standard pinout
●
Industrial level specifications
●
Meet CISPR22/EN55022 CLASS A
Patent Protected RoHS
PART NUMBER SYSTEM
URF2405LP -20W
R ate d Po w er
Pac kag e Sty le
O u tp ut Vo lta ge
Inp ut Vo lta ge
Pr od uc t Ser ies
APPLICATION
URF_LP-20W series are applied to wide voltage
range input situation such as power systems, data
transmission device, battery power supply device,
telecommunication device, distributed power supply
system, remote control system, industrial robot system
etc.
SELECTION GUIDE
Input Voltage(VDC)
Model
①
Nominal
(Range)
Max
②
Output
Voltage
(VDC)
5
Output Current (mA)
Max.
4000
1667
1334
834
4000
1667
1334
834
Min.
200
84
67
42
200
84
67
42
URF2405LP-20W
URF2412LP-20W
URF2415LP-20W
URF2424LP-20W
URF4805LP-20W
URF4812LP-20W
URF4815LP-20W
URF4824LP-20W
48
(18-75)
80
24
(9-36)
40
Input Current
(mA)(typ.)
@Max.
@No Load
Load
947
60
947
937
937
473
473
469
469
15
15
20
35
10
10
10
Reflected
Ripple
Current
(mA,typ.)
Max.
Capacitive
Load (µF)
10000
1600
1000
Efficiency
(%, typ.)
@Max. Load
88
88
89
89
88
88
89
89
③
12
15
24
5
12
15
24
30
500
10000
1600
1000
500
Note:
①series
with suffix
“A2S”
are chassis mounting，with suffix
“A4S”
are DIN-Rail mounting,
for example URF2405LP-20WA2S is chassis mounting ,URF2405LP-20WA4S is DIN-Rail mounting ;
②Absolute
maximum rating without damage on the converter;
③The
efficiency of "A2S" and "A4S" is approx. 2% lower for the protection of inverse polarity.
INPUT SPECIFICATIONS
Item
Input Surge Voltage (1sec.max.)
Test Conditions
24VDC input
48VDC input
24VDC input
48VDC input
24VDC input
48VDC input
Nominal input& constant resistance load
Models ON
Ctrl*
Models OFF
Input current (Models OFF)
Input Filter
Note: *The Ctrl control pin voltage is refer to GND.
Min.
-0.7
-0.7
--
--
7.8
16
--
Typ.
--
--
--
--
--
--
10
Max.
50
100
9
17.8
--
--
--
Unit
Start-up Voltage
VDC
Under Voltage Shutdown
Start-up Time
ms
Ctrl open or connect TTL high level (2.5-12VDC)
Ctrl connect GND or low level (0-1.2VDC)
--
1
Pi Filter
--
mA
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Page 1of 6
OUTPUT SPECIFICATIONS
Item
Output Voltage Accuracy
Line Regulation
Load Regulation
Transient Recovery Time
Transient Response Deviation
Temperature Drift
Ripple & Noise*
Trim
5VDC output
Output Over Voltage Protection
12VDC output
15VDC output
24VDC output
Over Current Protection
Short Circuit Protection
Input voltage range
Full load, input voltage from low to high
5% to 100% load
25% load step change
100% load
20MHz bandwidth
Test Conditions
Min.
--
--
--
--
--
--
--
--
--
--
--
--
--
Typ.
±1
±0.2
±0.5
300
±3
±0.02
70
±10%
6.2
15
18
28.8
150
Max.
±3
±0.5
±1
500
±5
--
100
--
--
--
--
--
--
%
VDC
µs
%
%/°C
mVp-p
%
Unit
Hiccup, Continuous, automatic recovery
Note:* Ripple and noise tested with
“parallel
cable” method. See detailed operation instructions at
DC-DC application notes.
COMMON SPECIFICATIONS
Item
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Switching Frequency
MTBF
Case Material
PCB mounting
Size
A2S Chassis mounting
A4S DIN-Rail mounting
PCB mounting
Weight
A2S Chassis mounting
A4S DIN-Rail mounting
--
--
--
Test Conditions
Input-Output, Tested for 1 minute and leakage current less than 5 mA
(Except the pin of Ctrl)
Input-Output, Test at 500VDC
Input-Output,100KHz/0.1V
PWM mode
MIL-HDBK-217F@25℃
Min.
3000
1000
--
--
1000
Typ.
--
--
1000
300
--
51.50×26.50×12.00
76.00×31.50×21.20
76.00×31.50×25.80
25
47
67
--
--
--
g
mm
Max.
--
--
--
--
--
Unit
VAC
MΩ
pF
KHz
K hours
Plastic (UL94-V0)
ENVIRONMENTAL SPECIFICATIONS
Item
Storage Humidity
Operating Temperature
Storage Temperature
The Max. Case Temperature
Lead Temperature
Cooling
Shake
Operating Temperature curve range
1.5mm from case for 10 seconds
Test Conditions
Non condensing
Power derating (above 65℃, see Figure 3)
Min.
5
-40
-40
--
--
Typ.
--
--
--
--
--
Max.
95
85
125
105
300
°C
Unit
%
Free air convection
10-55Hz, 10G, 30 Min. along X, Y and Z
EMC SPECIFICATIONS
EMI
CE
RE
ESD
RS
EFT
EMS
Surge
CS
Voltage dips, short and
interruptions immunity
CISPR22/EN55022
CISPR22/EN55022
IEC/EN61000-4-2
IEC/EN61000-4-3
IEC/EN61000-4-4
IEC/EN61000-4-5
IEC/EN61000-4-6
IEC/EN61000-4-29
CLASS A（Without External Circuit）/ CLASS B(External Circuit Refer to Figure1-②)
CLASS A（Without External Circuit）/ CLASS B(External Circuit Refer to Figure1-②)
Contact
10V/m
±2KV
±2KV
3 Vr.m.s
0%-70%
(External Circuit Refer to Figure1-①)
(External Circuit Refer to Figure1-①)
±4KV
perf. Criteria B
perf. Criteria A
perf. Criteria B
perf. Criteria B
perf. Criteria A
perf. Criteria B
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EMC RECOMMENDED CIRCUIT
Recommended external circuit parameters:
FUSE
V in
LDM1
+
MOV
GND
TVS
C0
C1
CY2
LDM2
Vin
+Vo
EUT
GND
LOAD
Model
FUSE
MOV
LDM1
TVS
C0
C1
LDM2
CY1,CY2
Vin:24V
Vin:48V
Choose according to actual input current
S14K35
S14K60
56μH
SMCJ48A
330μF/50V
1μF /50V
4.7μH
1nF/5KV
SMCJ90A
330μF/100V
1μF /100V
①
②
CY1
-Vo
(0V)
(Figure1)
Note: In Figure 1,part①is EMS recommended external circuit, part② is EMI
recommended external circuit. Choose according to requirements.
EMC RECOMMENDED CIRCUIT PCB LAYOUT
(Figure 2)
Note: The pad space between input and output (CY1/CY2) must≥2mm.
EMI TEST WAVEFORM(RECOMMENDED CIRCUIT 1-②)
URF2405LP-20W
CE (Class B, Positive line)
URF2405LP-20W
CE (Class B, Negative line)
URF4815LP-20W
CE (Class B, Positive line)
URF4815LP-20W
CE (Class B, Negative line)
URF2405LP-20W
RE(Class B, Horizontal)
URF2405LP-20W
RE(Class B, Vertical)
URF4815LP-20W
RE(Class B, Horizontal)
URF4815LP-20W
RE(Class B, Vertical)
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URF_LP-20W
2013.05.24-A/1
Page 3of 6
PRODUCT TYPICAL PERFORMANCE CURVE
Temperature Derating Graph
120
Output Power Percent (%)
100
80
60
40
20
0
-40
0
40
65 80 85
120
Operating Temp(°C)
Safe Operating Area
(Figure 3)
Efficiency VS Input Voltage curve
(Full Load)
URF2405LP-20W
100
95
90
85
80
75
70
65
60
55
50
9
12
15
18
21
24
27
30
33
36
100
90
80
70
60
50
40
30
20
10
0
Efficiency VS Output Load curve
(Vin=Vin-nominal)
URF2405LP-20W
Efficiency(%)
Efficiency(%)
5
Input Voltage(V)
10 20 30 40 50 60 70 80 90 100
Total Output Current (% )
Efficiency VS Input Voltage curve
URF4815LP-20W
(Full Load)
100
95
90
85
80
75
70
65
60
55
50
18
24 30 36 42 48 54 60 66 72 75
100
90
80
70
60
50
40
30
20
10
0
Efficiency VS Output Load curve
(Vin=Vin-nominal)
URF4815LP-20W
Efficiency(%)
Efficiency(%)
5
10 2 0 30 40 50 6 0 70 80 90 100
Input Voltage(V)
Total Output Current (%)
URF-LP-20W
OUTLINE DIMENSIONS, RECOMMENDED FOOTPRINT
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URF_LP-20W
2013.05.24-A/1
Page 4of 6
URF_LP-20WA2S SCHASSIS MOUNTING OUTLINE DIMENSIONS
Footprint Details:
Pin
Function
1
Ctrl
2
GND
3
Vin
4
0V
5
Trim
6
+Vo
URF_LP-20WA4S DIN-RAIL MOUNTING OUTLINE DIMENSIONS
DIN-rail modules are fitting to TS35 rails
Footprint Details:
Pin
Function
1
Ctrl
2
GND
3
Vin
4
0V
5
Trim
6
+Vo
PACKAGE DIAGRAM
PCB mounting Series（Without heat sink）
Special Package Series（A2S/A4S）
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MORNSUN
URF_LP-20W
2013.05.24-A/1
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