WRA_P-3WR2 & WRB_P-3WR2 Series
3W
，
WIDE INPUT, ISOLATED & REGULATED
DUAL/SINGLE OUTPUT, DC-DC CONVERTER
FEATURES
●
2:1 wide input voltage range
●
DIP Package
●
Efficiency up to 86%
●
1.5KVDC isolation
●
Short Circuit Protection(automatic recovery)
●
Temperature range: -40°C ~ +85°C
●
Meet CISPR22/EN55022 CLASS A
Patent Protected RoHS
PART NUMBER SYSTEM
WRA2405P-3WR2
Ra ted Power
Package Style
Output Vo ltage
In put Voltage
Product Se ries
APPLICATION
The WRA_P-3WR2 & WRB_P-3WR2 Series are
specially designed for applications where a wide range input
voltage power supplies are isolated from the input power
supply in a distributed power supply system on a circuit
board. For these DC-DC converters, you can reduce the
failure points of design, and save the manpower, material
and time cost in developing micro power supply, and also
ensure better quality, stability, safety protection, and
reliability for the end products.
These products apply to where:
1) Input voltage range
≤2:1;
2) 1.5KVDC input and output isolation;
3) Output regulated and low ripple noise is required.
SELECTION GUIDE
Input Voltage(VDC)
Model
WRA0505P-3WR2
WRA0512P-3WR2
WRA0515P-3WR2
WRB0505P-3WR2
WRB0512P-3WR2
WRB0515P-3WR2
WRA1205P-3WR2
WRA1209P-3WR2
WRA1212P-3WR2
WRA1215P-3WR2
WRB1203P-3WR2
WRB1205P-3WR2
WRB1212P-3WR2
WRB1215P-3WR2
WRB1224P-3WR2
WRA2405P-3WR2
WRA2412P-3WR2
WRA2415P-3WR2
WRB2403P-3WR2
WRB2405P-3WR2
WRB2412P-3WR2
WRB2415P-3WR2
WRB2424P-3WR2
WRA4805P-3WR2
WRA4812P-3WR2
WRA4815P-3WR2
48
(36-75)
80
24
(18-36)
40
12
(9-18)
20
5
(4.5-9)
11
Nominal
(Range)
Max.
①
Output
Voltage
(VDC)
±5
±12
±15
5
12
15
±5
±9
±12
±15
3.3
5
12
15
24
±5
±12
±15
3.3
5
12
15
24
±5
±12
±15
Output Current (mA)
Max.
±300
±125
±100
600
250
200
±300
±166
±125
±100
909
600
250
200
125
±300
±125
±100
909
600
250
200
125
±300
±125
±100
Min.
±15
±6
±5
30
12
10
±15
±8
±6
±5
46
30
12
10
6
±15
±6
±5
46
30
12
10
6
±15
±6
±5
Input Current
(mA)(Typ.)
@Max.
@No
Load
Load
790
770
770
811
780
780
309
298
298
295
338
309
302
305
302
153
149
149
160
155
146
146
147
77
75
74
5
15
30
40
Reflected
Ripple
Current
(mA,Typ.)
Max.
Capacitive
Load
②
(µF)
Efficiency
(%, Typ.)
@Max.
Load
76
78
78
74
77
77
81
84
84
85
74
81
83
82
83
82
84
84
78
81
86
86
85
82
84
85
2200
1800
20
1000
4700
2700
2200
2200
2000
1800
1000
4700
4700
2700
2200
1800
30
2200
1800
1000
4700
4700
2700
2200
1800
2200
1800
1000
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WRA_P-3WR2 & WRB_P-3WR2
2013.07.25-A/3
Page 1 of 6
WRB4803P-3WR2
WRB4805P-3WR2
WRB4812P-3WR2
WRB4815P-3WR2
48
(36-75)
80
3.3
5
12
15
909
600
250
200
46
30
12
10
82
77
73
73
5
30
4700
4700
2700
2200
76
82
86
86
Note:①. Absolute maximum rating without damage on the converter, but it isn't recommended;
②.
For dual output converter, the given value is the same for each output.
INPUT SPECIFICATIONS
Item
Test Conditions
5V input
12V input
Input Surge Voltage (1sec. max.)
24V input
48V input
5V input
Start-up Voltage
12V input
24V input
48V input
Input Filter
-0.7
-0.7
3.5
4.5
11
24
--
--
4
8
16
33
Pi Filter
50
100
4.5
9
18
36
VDC
Min.
-0.7
-0.7
Typ.
--
--
Max.
12
25
Unit
OUTPUT SPECIFICATIONS
Item
Output Voltage Accuracy
No load output Voltage Accuracy
Output Voltage Balance
Line Regulation
Load Regulation
Transient Recovery Time
Transient Response Deviation
Temperature coefficient
Ripple*
Noise*
Output Short Circuit Protection
Test Conditions
5% to 100% load
Input voltage range
Dual output, balanced loads
Full load, Input voltage from low to high
5% to 100% load
25% load step change
100% load
20MHz Bandwidth
Input voltage range
Min.
--
--
--
--
--
--
--
--
--
--
Typ.
±1
±1.5
±0.5
±0.2
±0.2
0.5
±2
±0.02
15
45
Max.
±3
±5
±1
±0.5
±0.5
2
±5
±0.03
30
75
ms
%
%/°C
mVp-p
%
Unit
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
Test Conditions
Tested for 1 minute, leakage current less than 1 mA
Test at 500VDC
Input/Output,100KHz/0.1V
Min.
1500
1000
--
--
1000
Typ.
--
--
120
200
--
Max.
--
--
--
--
--
Unit
VDC
MΩ
pF
KHz
K hours
Switching Frequency(PFM mode) 100% load, nominal Input voltage
MTBF
Case Material
Weight
MIL-HDBK-217F@25℃
Plastic（UL94-V0）
--
14
--
g
ENVIRONMENTAL SPECIFICATIONS
Item
Storage Humidity
Operating Temperature
Storage Temperature
Temp. rise at full load
Lead Temperature
Cooling
Ta=25°C
1.5mm from case for 10 seconds
Test Conditions
Non condensing
Power derating (above85℃,see Figure 5)
Min.
--
-40
-55
--
--
Typ.
--
--
--
25
--
Max.
95
85
125
--
300
°C
Unit
%
Free air convection
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
WRA_P-3WR2 & WRB_P-3WR2
2013.07.25-A/3
Page 2 of 6
EMC SPECIFICATIONS
CE
EMI
RE
ESD
RS
EFT
EMS
Surge
CS
Voltage dips, short
and interruptions
immunity
CISPR22/EN55022 CLASS A(Without External Circuit)/
CLASS B（Recommended Circuit Refer to Figure1-
②
or Figure 3
）
CISPR22/EN55022 CLASS A(Without External Circuit)/
CLASS B(Recommended Circuit Refer to Figure1-
②
or Figure 3)
IEC/EN61000-4-2
IEC/EN61000-4-3
IEC/EN61000-4-4
IEC/EN61000-4-4
IEC/EN61000-4-5
IEC/EN61000-4-6
IEC/EN61000-4-29
Contact
±4KV/
Air
±8KV
10V/m
±2KV
±4KV
±2KV
3 Vr.m.s
0%-70%
（Recommended
Circuit Refer to Figure1-①）
（Recommended
Circuit Refer to Figure 3）
perf. Criteria B
perf. Criteria A
perf. Criteria B
perf. Criteria B
（Recommended
Circuit Refer to Figure1-① or Figure 3） perf. Criteria B
perf. Criteria A
perf. Criteria B
EMC RECOMMENDED CIRCUIT
FU SE
Vi n
+
MO V
GND
TVS
C1
C0
GND
C2
L DM1
L D M2
Vi n
+Vo
EUT
- Vo
(0V)
LOAD
①
(Figure1)
②
C3
Recommended external circuit param eters:
Model
Vin:5V
FUSE
MOV
LDM1
TVS
C0
C1
LDM2
C2
C3
--
--
SMCJ13A
680μF/16V
Vin:12V
Vin:24V
Vin:48V
Choose according to practical input current
--
--
SMCJ28A
680μF/25V
4.7μF /50V
12μH
4.7μF /50V
1nF/2KV
4.7μF /100V
SMCJ48A
330μF/50V
S14K35
56μH
SMCJ90A
330μF/100V
4.7μF /100V
S14K60
Note: 1.In Figure 1, part① is EMS Recommended external circuit, part② is EMI recommended external circuit. Choose according to requirements;
2. If there is no recommended parameters, the model no require the external component.
EMC RECOMMENDED CIRCUIT PCB LAYOUT
DUAL
SINGLE
(Figure 2)
Note: The space between input and output GND (C3) must≥2mm.
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WRA_P-3WR2 & WRB_P-3WR2
2013.07.25-A/3
Page 3 of 6
EMC MODULE APPLICATION CIRCUIT
FUSE
+Vin
+Vin
Vin
+Vo
+
C
-Vin
-Vin
FT- A/BX1 D
+Vo
-Vo
GN D
EU T
Lo ad
-Vo
(0 V)
Nominal Input Voltage<48V, C≥330uF/50V
Nominal Input Voltage=48V, C≥330uF/100V
FT-A/BX1D is MORNSUN’s EFT suppresser
(Figure 3)
EMC MODULE RECOMMENDED CIRCUIT PCB LAYOUT
DUAL
SINGLE
(Figure 4)
EMI TEST WAVEFORM (RECOMMENDED CIRCUIT REFER TO FIGURE 1-②)
WRA2415P-3WR2 CE(Class B, Positive line)
WRA2415P-3WR2 CE(Class B, Negative line)
PRODUCT TYPICAL PERFORMANCE CURVE
Tolerance Envelope Graph
O u t pu t P o w er P er ce n t( % )
120
100
80
60
Safe Operating Area
40
20
0
-40
0
40
85 105120
Temperature Derating Graph
Output Current Percent(%)
Ambient Temp.(
℃
)
(Figure 5)
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WRA_P-3WR2 & WRB_P-3WR2
2013.07.25-A/3
Page 4 of 6
Efficiency VS Input Voltage curve
(Full Load)
WRA2415P-3WR2
100
95
90
85
80
75
70
65
60
55
50
18
21
24
27
30
Input Voltage(V)
33
36
Efficiency VS Output Load curve
WRA2415P-3WR2
(Vin=Vin-nominal)
100
90
80
70
60
50
40
30
20
10
0
10
20
30 40 50 60 70 80 90 100
Total Output Current (%)
Efficiency(%)
Efficiency(%)
Efficiency VS Input Voltage curve
(Full Load)
WRB2405P-3WR2
100
95
90
85
80
75
70
65
60
55
50
18
21
24
27
30
Input Voltage(V)
33
36
Efficiency VS Output Load curve
WRB2405P-3WR2
(Vin=Vin-nominal)
100
90
80
70
60
50
40
30
20
10
0
10
20
30 40 50 60 70 80 90 100
Total Output Current (%)
MECHANICAL DIMENSIONS，RECOMMENDED FOOTPRINT & PACKAGING
TEST CONFIGURATIONS
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate the source impedance.
Oscilloscope
Efficiency(%)
Lin
Cin
Lin(4.7µH)
Current
Probe
DC DC
Efficiency(%)
Load
Cin(220µF, ESR < 1.0Ω at 100 KHz)
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
WRA_P-3WR2 & WRB_P-3WR2
2013.07.25-A/3
Page 5 of 6
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