DC/DC Converter
WRA_P- 3WR2 & WRB_P- 3WR2 Series
3W,wide input isolated & regulated
DC-DC converter
FEATURES
Wide range of input voltage (2:1)
DIP package
Efficiency up to 86%
1.5KVDC isolation
Short circuit protection(automatic recovery)
Operating temperature range:-40°C ~ +85°C
Meet CISPR22/EN55022 CLASS A
Meet
EN60950
Patent Protection
RoHS
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.
In circuits such as industrial control, electric power, communication system power supply, etc.
Selection Guide
Part No.
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
24
(18-36)
40
12
(9-18)
20
5
(4.5-9)
11
Input Voltage
(VDC)
Nominal
①
Max.
(Range)
Output
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
Output Current (mA)
(Max./Min.)
±300/±15
±125/±6
±100/±5
600/30
250/12
200/10
±300/±15
±166/±8
±125/±6
±100/±5
909/46
600/30
250/12
200/10
125/6
±300/±15
±125/±6
±100/±5
909/46
600/30
250/12
200/10
125/6
Efficiency (%,Typ.)
@ Full Load
76
78
78
74
77
77
81
84
84
85
74
81
83
82
83
82
84
84
78
81
86
86
85
Max. Capacitive
②
Load
(μF)
2200
1800
1000
4700
2700
2200
2200
2000
1800
1000
4700
4700
2700
2200
1800
2200
1800
1000
4700
4700
2700
2200
1800
--
CE
--
certification
2014.04.04-A/4
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DC/DC Converter
WRA_P- 3WR2 & WRB_P- 3WR2 Series
WRA4805P-3WR2
WRA4812P-3WR2
WRA4815P-3WR2
WRB4803P-3WR2
WRB4805P-3WR2
WRB4812P-3WR2
WRB4815P-3WR2
48
(36-75)
80
±5
±12
±15
3.3
5
12
15
±300/±15
±125/±6
±100/±5
909/46
600/30
250/12
200/10
82
84
85
76
82
86
86
2200
1800
1000
4700
4700
2700
2200
--
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
Operating Conditions
5VDC input
Input Current (full load /no-load)
12VDC input
24VDC input
48VDC input
5VDC input
Reflected Ripple Current
12VDC input
24VDC input
48VDC input
5VDC input
Input impulse Voltage (1sec. max.)
12VDC input
24VDC input
48VDC input
5VDC input
Starting Voltage
12VDC input
24VDC input
48VDC input
Input Filter
--
--
--
--
-0.7
--
--
Min.
Typ.
811/40
309/30
155/15
77/5
20
30
30
30
--
--
--
--
--
--
--
--
Pi filter
Max.
Unit
--
mA
--
12
25
50
100
4.5
9
18
36
VDC
Output Specifications
Item
Output Voltage Accuracy
No load output Voltage Accuracy Input voltage range
Balance of Output Voltage
Linear Regulation
Load Regulation
Transient Recovery Time
Transient Response Deviation
Temperature Coefficient
Ripple&Noise*
Short circuit Protection
Dual output, balanced load
Full load, the input voltage is from low voltage to
high voltage
5%-100% load
25% load step change
Full load
20MHz bandwidth
Input voltage range
Operating Conditions
Min.
--
--
--
--
--
--
--
--
--
Typ.
±1
±1.5
±0.5
±0.2
±0.2
0.5
±2
±0.02
50
Max.
±3
±5
±1
±0.5
±0.5
2
±5
±0.03
80
Unit
%
ms
%
%/
°
C
mV p-p
Continuous, self-recovery
Note: * Ripple and noise are measured by “parallel cable” method, please see DC-DC Converter Application Notes for specific operation.
General Specifications
Item
Insulation Voltage
Insulation Resistance
Operating Conditions
Input-output, with the test time of 1 minute and the
leak current lower than 1mA
Input-output, isolation voltage 500VDC
Min.
1500
1000
Typ.
--
--
Max.
--
--
Unit
VDC
MΩ
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MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
WRA_P- 3WR2 & WRB_P- 3WR2 Series
Isolation Capacitance
Operating Temperature
Storage Temperature
Casing Temperature Rise
Hand Soldering
Storage Humidity
Switching Frequency(PFM
mode)
MTBF
Ta=25℃
Welding spot is 1.5mm away from the casing, 10
seconds
Non-condensing
100% load, nominal input voltage
MIL-HDBK-217F@25°C
Input-output, 100KHz/0.1V
Derating if the temperature is
≥85°C
(see Fig. 1)
--
-40
-55
--
--
--
--
1000
120
--
--
25
--
--
200
--
--
85
125
--
300
95
--
--
%
KHz
K hours
℃
pF
Physical Specifications
Casing Material
Dimensions
Weight
Cooling
Plastic(UL94-V0)
31.60*20.30*10.20 mm
14g(Typ.)
Free convection
EMC Specifications
EMI
Conducted emission
Radiated emission
Electrostatic discharge
Radiation immunity
EFT
EMS
Surge immunity
Conducted disturbance immunity
Immunities of voltage dip,
drop and short interruption
CISPR22/EN55022 CLASS A(Bare component)/CLASS B (see Fig.3-② for recommended circuit)
CISPR22/EN55022 CLASS A(Bare component)/CLASS B (see Fig.3-② for recommended circuit)
IEC/EN61000-4-2
IEC/EN61000-4-3
IEC/EN61000-4-4
IEC/EN61000-4-5
IEC/EN61000-4-6
IEC/EN61000-4-29
Contact ±4KV/ Air ±8KV
10V/m
±2KV (see Fig.3-① for recommended circuit)
±2KV (see Fig.3-①for recommended circuit)
3 Vr.m.s
0-70%
perf. Criteria B
perf. Criteria A
perf. Criteria B
perf. Criteria B
perf. Criteria A
perf. Criteria B
Product Characteristic Curve
Output Power Per centage(%)
Te mpe rature Derating Cu rve
120
100
80
60
40
20
0
-40
40
85 105 120
0
En vi ronment Temperature.(
℃
)
Safe Operati on Area
Fig. 1
100
95
Efficiency Vs input Voltage (Full Load)
Efficiency Vs Output Load(Vin=Vin-nominal)
100
90
80
70
60
50
40
30
20
10
20
30
40
50
60
70
80
90
100
WRA2415P-
3WR2
Efficiency(%)
90
WRA2415P-
3WR2
80
75
70
65
60
18
21
24
27
30
33
36
Efficiency(%)
85
Input Voltage(V)
Output Current Percentage(%)
2014.04.04-A/4
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MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
WRA_P- 3WR2 & WRB_P- 3WR2 Series
Efficiency Vs input Voltage(Full Load)
Efficiency Vs Output Load(Vin=Vin-nominal)
100
90
80
70
60
50
40
30
20
WRB2405P-
3WR2
100
95
Efficiency(%)
90
80
75
70
65
60
18
21
24
27
30
33
36
40
WRB2405P-
3WR2
Efficiency(%)
85
10
20
30
40
50
60
70
80
90 100
Input Voltage(V)
Output Current Percentage(%)
Design Reference
1. Output load requirements
To ensure that the module can work efficiently and reliably, its output min. load shall be no lower than 5% of the rated load when using, or
the output ripple may increase rapidly. Ensure that the product working load must be higher than 5% of the rated load.
2. Typical application
All the DC/DC converters of this series are tested according to the recommended circuit (see Fig. 2) before delivery.
If it is required to further reduce input and output ripple, properly increase the input & output of additional capacitors Cin and Cout or
select capacitors of low equivalent impedance provided that the capacitance is no larger than the max. capacitive load of the product.
D ual
Vin
Cin
Cout
+Vo
0V
-Vo
+Vo
DC
DC
GND
Cout
Vin
Cin
Cout
5V&12V
100μF
10μF
24V&48V
10μF~47μF
Si ngle
Vin
Cin
DC
DC
Cout
GND
0V
Fig. 2
3. EMC solution-recommended circuit
Vin
FUSE
LDM1
Vin
+
+Vo
C3
LOAD
MOV
GND
C0
C1
C2
DCDC
GND
-Vo
(0V)
①
②
CY1
Fig. 3
2014.04.04-A/4
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DC/DC Converter
WRA_P- 3WR2 & WRB_P- 3WR2 Series
Parameter description:
Model
FUSE
MOV
C0
C1
LDM1
C2
C3
CY1
4.7μF/50V
10μF
1nF/2KV
--
1000μF/16V
Vin:5V
Vin:12V
S14K25
1000μF/25V
4.7μF/50V
12μH
4.7μF /100V
Vin:24V
S14K35
330μF/50V
Vin:48V
S14K60
330μF/100V
4.7μF/100V
Slow blown fuses according to the actual input current selections of the clients
Note:
①.Part ①
in the Fig. 3 is used for EMS test and part
②
for EMI filtering; selected based on needs.
②.If
there is no recommended parameters, the model no require the external component.
EMC solution-recommended circuit PCB layout
Dual
Single
Note: Note: the min. distance of the bonding pads between input grounding and output grounding shall be
≥
2mm.
Fig. 4
4. Input current
When the electricity is provided by the unstable power supply, please make sure that the range of the output voltage fluctuation and the
ripple voltage of the power supply do not exceed the indicators of the modules. Input current of power supply should afford the flash startup
current of this kind of DC/DC module(see Fig. 5).
Generally: Vin=5V
Iave =1400mA
Vin=12V
Iave=620mA
Vin=24V
Iave=310mA
Vin=48V
Iave =150mA
Input Current(A)
Iave
Input Voltage
scope
Input Voltage (V)
Fig. 5
5. For more information please find DC-DC converter application notes on www.mornsun-power.com
2014.04.04-A/4
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