WRA-YMD-3W
＆
WRB-YMD -3W
Series
3W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
SELECTION GUIDE
Input
Output
Efficiency
Voltage
Max*
11
11
11
11
11
11
(VDC)
±5
±12
±15
Current(mA)
(%,Typ)
Nominal
Range
Order code
Voltage(VDC)
Max.
±300
±125
±100
Min.
±30
±12
±10
68
FEATURES
◆
Wide (2:1) Input Range
◆Short
Circuit Protection
(automatic recovery)
◆
1500VDC Isolation
◆
Operating Temperature:
-40℃½﹢85℃
◆
No
heat sink required
◆
No external component required
◆
Internal SMD required
◆
Five sided metal shielding
◆
MTBF>1000Khours
WRA0505YMD-3W
WRA0512YMD-3W
WRA0515YMD-3W
WRB0505YMD-3W
WRB0512YMD-3W
WRB0515YMD-3W
WRA1205YMD-3W
WRA1212YMD-3W
WRA1215YMD-3W
WRB1205YMD-3W
WRB1209YMD-3W
WRB1212YMD-3W
5
5
5
5
5
5
4.5-9
4.5-9
4.5-9
4.5-9
4.5-9
4.5-9
72
71
68
72
71
76
80
80
77
78
80
81
80
77
80
80
77
79
81
81
80
77
80
81
77
79
81
81
80
80
78
5
12
15
±5
±12
±15
600
250
200
±300
±125
±100
60
25
20
±30
±12
±10
12
12
12
12
12
12
12
12
24
24
24
24
24
24
24
24
48
48
48
48
48
48
48
48
110
110
9-18
9-18
9-18
9-18
9-18
9-18
9-18
9-18
18-36
18-36
18-36
18-36
18-36
18-36
18-36
18-36
36-72
36-72
36-72
36-72
36-72
36-72
36-72
36-72
72-144
72-144
22
22
22
22
22
22
22
22
40
40
40
40
40
40
40
40
80
80
80
80
80
80
80
80
155
155
5
9
12
15
24
±5
±12
±15
600
333
250
200
125
±300
±125
±100
60
33
25
20
12
±30
±12
±10
MODEL SELECTION
①
②
③ ④
⑤
⑥
⑦
WRB 48 05 Y M D -3W
WRB1215YMD-3W
WRB1224YMD-3W
WRA2405YMD-3W
WRA2412YMD-3W
WRA2415YMD-3W
WRB2405YMD-3W
①Product
Series
③Output
Voltage
⑤Metal
Shield
⑦Rated
Power
②Input
Voltage
④Wide
(2:1) Input Range
⑥DIP
Package Style
5
9
12
15
24
±5
±12
±15
600
333
250
200
125
±300
±125
±100
60
33
25
20
12
±30
±12
±10
APPLICATIONS
The WRA_YMD-3W&WRB_YMD-3W 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.
These products apply to:
1) Where the voltage of the input
power supply is wide range
(Voltage range≤2:1);
2) Where isolation is necessary
between input and output
(Isolation voltage≤1500VDC);
3) Where the regulation of the
Output voltage and the output
ripple noise are demanded.
WRB2409YMD-3W
WRB2412YMD-3W
WRB2415YMD-3W
WRB2424YMD-3W
WRA4805YMD-3W
WRA4812YMD-3W
WRA4815YMD-3W
WRB4805YMD-3W
WRB4809YMD-3W
WRB4812YMD-3W
WRB4815YMD-3W
WRB4824YMD-3W
WRB11012YMD-3W
WRB11024YMD-3W
5
9
12
15
24
12
24
600
333
250
200
125
250
125
60
33
25
20
12
25
12
*
Input voltage can’t exceed this value,or will cause the permanent damage.
MICRODC reserves the copyright
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 1/4
WRA-YMD-3W
＆
WRB-YMD -3W
Series
TEMPERATURE CHARACTERISTICS
Parameter
Output power
Positive voltage accuracy
Negative voltage accuracy
Load regulation
Line regulation
Temperature drift (Vout)
Ripple & Noise**
Switching frequency
TYPICAL CHARACTERISTICS
Typ.
Max.
3
±1
±3
±0.5
±0.2
±3
±5
±1*
±0.5
±0.03
75
300
150
Conditions
Refer to products program
Refer to recommended circuit
Refer to recommended circuit
Form 10% to 100% load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
100% load, input voltage range
Min.
0.3
Units
W
%
%
%
%
%/°C
mVp-p
KHz
Temperature Derating Graph
* Dual output models unbalanced load: ±5%.
** Test ripple and noise by “ parallel cable ” method. See detailed
operation
RECOMMENDED CIRCUIT
instructions at Testing of Power Converter section, application notes.
Output Graph
COMMON SPECIFICATIONS
Parameter
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Cooling
Short circuit protection
1.5mm from case for 10 seconds
Conditions
Min.
Typ.
Max.
95
Units
%
℃
℃
℃
-40
-55
±1
±3
15
85
125
300
Free Air Convection
℃
Continuous, Automatic recovery
Case material
No-load power consumption
Aluminium Alloy
0.2
Tested for1 minute and 1mA max
W
VDC
MΩ
Isolation voltage
Isolation resistance
Isolation Capacitance
MTBF
Weight
1500
1000
100
1000
15
Test at 500VDC
Input/output
pF
K hours
g
Output External Capacitor Table(Table 1)
Single Vout
Cout
(μF)
2200
1000
680
Dual Vout
(VDC)
±5
±9
±12
Cout
(μF)
680
470
330
APPLICATION NOTE
(VDC)
3.3
5
9
Requirement on output load
In order to ensure the product operate efficiently and
12
470
±15
220
Reliably,in addition to a max load(namely full load), a
15
330
----
----
Minimum load is specified for this kind of DC/DC
24
220
----
----
Converter.Make sure the specified range of input voltage
Is not exceeded,the minimum output load no less than 10%
load.If the actual load is less than the specified minimum load, the output ripple may increase
sharply while its efficiency and reliability will reduce greatly.If the actual output power is
very small,please add an appropriate resistor as extra loading,or contact our company for other
lower output power products.
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 2/4
WRA-YMD-3W
＆
WRB-YMD -3W
Series
APPLICATION NOTE
Recommended Circuit
All the WRA_YMD-3W&WRB_YMD-3W Series have been tested according to the following recommended testing
circuit before leaving factory.This series should be tested under load(see Figure 1).
If you want to further decrease the input/output ripple,you can increase capacitance properly or choose
capacitors with low ESR.However,the capacitance of the output filter capacitor must be proper.If the
capacitance is too big,a startup problem might arise.For every channel of output,provided the safe and
reliable operation is ensured,the greatest capacitance of its filter capacitor sees (Table 1).General:
Cin:
5V&12V
100μF
24V&48V
10μF-47μF
Cout: 10μF/100mA
Input current
While using unstable power source,please ensure the output voltage and ripple voltage do not exceed
indexes of the converter.The preceding power source must be able to provide for converter sufficient
starting current Ip(Figure 2).General:Ip≤1.4*Iin-max
No parallel connection or plug and play
OUTLINE DIMENSIONS
＆
FOOTPRINT DETAILS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT
Note:
Unit:mm[inch]
Pin section tolerances:±0.10mm[±0.004inch]
General tolerances:±0.25mm[±0.010inch]
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 3/4
WRA-YMD-3W
＆
WRB-YMD -3W
Series
OUTLINE DIMENSIONS
＆
FOOTPRINT DETAILS
FOOTPRINT DETAILS
TUBE OUTLINE DIMENSIONS
Pin
1
2
3
4
5
Single
GND
Vin
+Vo
NC
0V
Dual
GND
Vin
+Vo
0V
-Vo
NC:No connection
When the environment temperature is higher
than 71℃, the product output power should be
less then 60% of the rated power.
Note:
No parallel connection or plug and play.
Use dual output simultaneously,forbid opening
output pin (0V) to use as single output.
Unit :mm[inch]
General tolerances:±0.50mm[±0.020inch]
L=530mm[20.866inch] Tube Quantity: 19pcs
L=220mm[8.661inch] Tube Quantity: 7pcs
Note:
1. The load shouldn't be less than 10%, otherwise ripple will increase dramatically.
2. Operation under 10% load will not damage the converter; However, they may not meet all specification listed.
3. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless
otherwise specified.
4. In this datasheet, all the test methods of indications are based on corporate standards.
5. Only typical models listed, other models may be different, please contact our technical person for more details.
RoHS COMPLIANT INFORMATION
Microdc Professional Power Module,Inc.
Tel:0086-20-86000646 E-mail:tech@microdc.cn
Website:http://www.microdc.cn
Microdc Professional Power module,Inc.makes no representation that
the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or
future patent rights. Specifications are subject to change without notice.
©2010
Microdc Professional Power Module, Inc. Guangzhou
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°C
for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte
Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are
backward compatible with Sn/Pb soldering systems.
REACH COMPLIANT INFORMATION
This series has proven that this product does not contain harmful chemicals, it also has harmful chemical
substances through the registration, inspection and approval.
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 4/4
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