URA_LD-20WR2 &
URB_LD-20WR2 Series
20W, ULTRA-WIDE INPUT, ISOLATED &
REGULATED SINGLE/DUAL OUTPUT
DC-DC CONVERTER
FEATURES
●
Efficiency up to 90%
●
4:1 wide input voltage range
●
Output over current, over voltage and input
under voltage protection,Short circuit protection
●
1.5KVDC isolation
●
Operating temperature range: -40°C ~ +85°C
●
Six-sided metal shield
●
Industry standard pinout
●
Meet CISPR22/EN55022 CLASS A
●
Meet UL60950 and EN60950
●
A2S(chassis mounting)and A4S(DIN-Rail
mounting) have the function of input reverse
connection preventing
Patent Protectied RoHS
PART NUMBER SYSTEM
URB2405LD-20WR2
Rated Power
Package Style
Output Voltage
Input Voltage
Product Series
Application
URA_LD-20WR2 & URB_LD-20WR2 series are applied to
wide voltage range input situation such as data transmission
device, battery power supply device, tele-comunication device,
distributed power supply system, remote control system, industrial
robot system etc.
SELECTION GUIDE
Approval
Model
①
Input Voltage
Output
(VDC)
Voltage
Nominal
Max.
②
(VDC)
(Range)
±5
±12
±15
24
(9-36)
3.3
40
5
9
12
15
24
±5
±12
±15
48
(18-75)
80
3.3
5
12
15
24
Output Current (mA)
Max.
±2000
±834
±667
5000
4000
2222
1667
1333
834
±2000
±834
±667
5000
4000
1667
1333
834
Min.
±100
±42
±33
250
200
111
84
67
42
±100
±42
±33
250
200
84
67
42
Input Current
Reflection
Efficiency
④
Max.
(mA)(Typ.)
Ripple
Capacitive (%, typ.)
Current
@
@
Load
③
(µF) @Max.
Load
Max.Load No Load (mA,Typ.)
969
948
947
800
916
947
937
926
927
485
474
468
400
463
468
463
463
20
15
15
40
60
18
15
15
20
20
15
15
35
35
10
10
10
2013.11.29-A/3
URA2405LD-20WR2
URA2412LD-20WR2
URA2415LD-20WR2
URB2403LD-20WR2
URB2405LD-20WR2
CE
URB2409LD-20WR2
URB2412LD-20WR2
URB2415LD-20WR2
URB2424LD-20WR2
URA4805LD-20WR2
URA4812LD-20WR2
URA4815LD-20WR2
URB4803LD-20WR2
URB4805LD-20WR2
UL/CE
URB4812LD-20WR2
URB4815LD-20WR2
URB4824LD-20WR2
4800
800
625
18700
9600
4700
1600
1000
30
500
4800
800
625
18700
9600
1600
1000
500
86
88
88
86
90
88
89
90
90
86
88
89
86
90
89
90
90
Page 1 of 10
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
URA_LD-20WR2 & URB_LD-20WR2
Note:
①Series
with suffix
“H”
are heat sink mounting; series with suffix
“A2S”
are chassis mounting，with suffix
“A4S”
are DIN-Rail mounting, for example
URB2405LD-20WHR2A2S is chassis mounting of with heat sink,URB2405LD-20WR2A4S is DIN-Rail mounting of without heat sink;If the application has a
higher requirement for heat dissipation, you can choose modules with heat sink;
②Absolute
maximum rating without damage on the converter;
③For
dual-output-converters the given value is for one output (for both outputs the same value);
④The
efficiency of "A2S" and "A4S" is approx. 2% lower for the protection of inverse polarity.
INPUT SPECIFICATIONS
Item
Input Surge Voltage (1sec. max.)
Start-up Voltage
Under Voltage Shutdown
Start-up time
Ctrl
*
Input filter
Note:*The Ctrl control pin voltage is refer to GND.
Test conditions
24VDC Input
48VDC Input
24VDC Input
48VDC Input
24VDC Input
48VDC Input
Nominal input & constant resistance load
Models ON
Models OFF
Input current (Models OFF)
Min.
-0.7
-0.7
--
--
7.5
16
--
Typ.
--
--
--
--
--
--
10
Max.
50
100
9
17.8
--
--
--
Unit
VDC
ms
Ctrl open or connect TTL high level (2.5-12VDC)
Ctrl connect GND or low level (0-1.2VDC)
--
1
Pi Filter
--
mA
OUTPUT SPECIFICATIONS
Item
Positive Output Voltage Accuracy
Negative Output Voltage Accuracy
Output Voltage Balance
Line Regulation
Load Regulation
Cross Regulation
Transient Recovery Time
Transient Response Deviation
Temperature Drift
Ripple & Noise *
Output voltage Trim
3.3V output
5V output
Output Over Voltage Protection
9V output
12V output
15V output
24V output
Over Current Protection
Output Short Circuit Protection
Input voltage range
Dual output，Balance load
Full load, Input voltage from low to high
10% to 100% load
Dual output,main output 50% load,
Supplement output from 10% to 100% load
25% load step change
100% load
20MHz Bandwidth
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Test Conditions
Min.
Typ.
±1
±0.5
±0.2
±0.5
--
300
±3
±0.02
70
±10%
3.9
6.2
10.8
15
18
30
160
Max.
±3
±1
±0.5
±1
±5
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
24V output
Others
Test Conditions
Input-Output, Tested for 1 minute ,leakage current less than 1 mA
Input-Output, Test at 500VDC
Input/Output,100KHz/0.1V
Min.
1500
1000
--
--
315
--
1000
Typ.
--
--
2000
1000
--
300
--
Max.
--
--
--
--
345
--
--
K hours
Unit
VDC
MΩ
pF
Switching Frequency
MTBF
Safety approvals
URB2424LD-20WR2 PWM mode
Others
PWM mode
MIL-HDBK-217F@25℃
URB48XXLD-20WR2
Others
KHz
UL60950, EN60950
EN60950
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
URA_LD-20WR2 & URB_LD-20WR2
2013.11.29-A/3
Page 2 of 10
Case Material
PCB mounting
（Without
heat sink）
PCB mounting
（With
heat sink）
Size
A2S Chassis mounting（Without heat sink）
A2S Chassis mounting（With heat sink）
A4S DIN-Rail mounting（Without heat sink）
A4S DIN-Rail mounting（With heat sink）
PCB mounting
（Without
heat sink）
PCB mounting
（With
heat sink）
Weight
A2S Chassis mounting（Without heat sink）
A2S Chassis mounting（With heat sink）
A4S DIN-Rail mounting（Without heat sink）
A4S DIN-Rail mounting（With heat sink）
Aluminum Alloy
50.80×25.40×11.80
50.80×25.40×16.30
76.00×31.50×21.20
76.00×31.50×25.10
76.00×31.50×25.80
76.00×31.50×29.70
--
--
--
--
--
--
28
36
50
58
70
78
--
--
--
--
--
--
g
mm
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
See Temperature Derating Curve (Figure 3)
Min.
5
-40
-55
--
--
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
±4KV
10V/m
±2KV
±2KV
3 Vr.m.s
0%-70%
(External Circuit Refer to Figure1-①)
(External Circuit Refer to Figure1-①)
perf. Criteria B
perf. Criteria A
perf. Criteria B
perf. Criteria B
perf. Criteria A
perf. Criteria B
EMC RECOMMENDED CIRCUIT
Recommended external circuit parameters:
FU S E
Model
URA/B24_LD-20WR2 URA/B48_LD-20WR2
V in
Vi n
+ Vo
FUSE
Choose according to practical input current
+
MOV
S14K35
S14K60
EUT
LOAD
C1
MOV
TV S
C0
LDM1
56μH
GND
GND
- Vo
TVS
SMCJ48A
SMCJ90A
(0 V)
①
②
CY 2
C0
330μF/50V
330μF/100V
C1
1μF /50V
1μF /100V
(Figure1)
LDM2
4.7μH
Note:1.In Figure 1,part①is EMS recommended external circuit, part
②is
EMI
1nF/2KV
CY1、CY2
LD M1
LD M2
CY1
recommended external circuit(CLASS B). Choose according to requirements.
EMC RECOMMENDED CIRCUIT PCB LAYOUT
(Figure 2)
Note: The pad space between input and output (CY1/CY2) must
≥2mm.
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
URA_LD-20WR2 & URB_LD-20WR2
2013.11.29-A/3
Page 3 of 10
EMC TEST WAVEFORM(CLASS B TEST CIRCUIT)
URB2405LD-20WR2
CE (Positive line)
URB2405LD-20WR2
CE (Negative line)
URB4815LD-20WR2
CE (Positive line)
URB4815LD-20WR2
CE (Negative line)
URB2405LD-20WR2
RE(Horizontal)
URB2405LD-20WR2
RE(Vertical)
URB4815LD-20WR2
RE(Horizontal)
URB4815LD-20WR2
RE(Vertical)
URA2405LD-20WR2 CE (Positive line)
URA2405LD-20WR2 CE (Negative line)
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
URA_LD-20WR2 & URB_LD-20WR2
2013.11.29-A/3
Page 4 of 10
URA4815LD-20WR2 CE (Positive line)
URA4815LD-20WR2 CE (Negative line)
URA2405LD-20WR2 RE(Horizontal)
URA2405LD-20WR2 RE(Horizontal)
URA4815LD-20WR2 RE(Horizontal)
URA4815LD-20WR2 RE(Horizontal)
PRODUCT TYPICAL CURVE
Temperature Derating Curve
120
Output Power Percent (%)
100
80
60
40
20
0
-40
0
Without heatsink
Safe Operating Area
With heatsink
40 55 60 80 85
(Figure 3)
120
Operating Temp(°C)
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
URA_LD-20WR2 & URB_LD-20WR2
2013.11.29-A/3
Page 5 of 10
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