WRA-YMD-10W
＆
WRB-YMD-10W
Series
2:1 WIDE INPUT,ISOLATED®ULATED Dual/Single Output DC/DC Converter
SELECTION GUIDE
Input
order code
Nominal
WRA0505YMD-10W
WRA0509YMD-10W
WRA0512YMD-10W
Voltage(VDC)
Range
Max*
Output
Current(MA)
Max
Min
Voltage
(VDC)
(%,Typ)
Efficiency
5
5
5
5
5
5
5
5
12
12
12
12
12
12
12
12
12
12
24
24
24
24
24
24
24
24
24
48
48
48
48
48
48
48
48
48
4.5-9.0
4.5-9.0
4.5-9.0
4.5-9.0
4.5-9.0
4.5-9.0
4.5-9.0
4.5-9.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
9.0-18.0
18.0-36.0
18.0-36.0
18.0-36.0
18.0-36.0
18.0-36.0
18.0-36.0
18.0-36.0
18.0-36.0
18.0-36.0
36.0-72.0
36.0-72.0
36.0-72.0
36.0-72.0
36.0-72.0
36.0-72.0
36.0-72.0
36.0-72.0
36.0-72.0
11
11
11
11
11
11
11
11
20
20
20
20
20
20
20
20
20
20
40
40
40
40
40
40
40
40
40
80
80
80
80
80
80
80
80
80
±1000
±556
±416
±333
2000
1111
833
666
±1000
±556
±416
±333
2500
2000
1111
833
666
416
±1000
±556
±416
±333
2500
2000
1111
833
666
±1000
±556
±416
±333
2500
2000
1111
833
666
±100
±56
±42
±33
200
111
83
66
±100
±56
±42
±33
250
200
111
83
66
42
±100
±56
±42
±33
250
200
111
83
66
±100
±56
±42
±33
250
200
111
83
66
±5
±9
±12
±15
5
9
12
15
±5
±9
±12
±15
3.3
5
9
12
15
24
±5
±9
±12
±15
3.3
5
9
12
15
±5
±9
±12
±15
3.3
5
9
12
15
75
76
80
82
76
78
80
82
79
84
82
84
79
79
81
82
84
82
81
79
84
86
78
80
78
84
86
80
80
84
85
78
80
80
84
86
FEATURES
◆
RoHS compliant
◆
Efficiency up to 86%
◆
DIP Package
◆
Wide temperature performance at full
WRA0515YMD-10W
WRB0505YMD-10W
WRB0509YMD-10W
WRB0512YMD-10W
WRB0515YMD-10W
WRA1205YMD-10W
WRA1209YMD-10W
WRA1212YMD-10W
10 Watt load,-40°C to 85°C
◆
UL 94V-0 package material
◆
No heatsink required
◆
Industry standard pinout
◆
I/O Isolation 1500VDC
◆
Short Circuit Protection(
automatic recovery
)
◆
Metal shielding package
◆
MTBF>1000000 hours
WRA1215YMD-10W
WRB1203YMD-10W
WRB1205YMD-10W
WRB1209YMD-10W
WRB1212YMD-10W
WRB1215YMD-10W
WRB1224YMD-10W
WRA2405YMD-10W
WRA2409YMD-10W
WRA2412YMD-10W
WRA2415YMD-10W
WRB2403YMD-10W
WRB2405YMD-10W
WRB2409YMD-10W
MODEL SELECTION
WRB 24 05 Y M D -10W
①Product
Series
③Output
Voltage
⑤Metal
Shield
⑦Rated
Power
①
②
③
④
⑤
⑥
⑦
WRB2412YMD-10W
WRB2415YMD-10W
WRA4805YMD-10W
WRA4809YMD-10W
②Input
Voltage
④Wide
(2:1) Input Range
⑥DIP
Package Style
WRA4812YMD-10W
WRA4815YMD-10W
WRB4803YMD-10W
WRB4805YMD-10W
WRB4809YMD-10W
WRB4812YMD-10W
WRB4815YMD-10W
DESCRIPTION
The WRA_YMD-10W & WRB_YMD-10W series are
specially designed for applications where a group of polar
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.
*Input voltage can't exceed this value,or will cause the permanent damage.
OUTPUT SPECIFICATIONS
Parameter
Test conditions
Min.
Typ.
Max.
Units
Output power
Positive voltage accuracy
Negative voltage accuracy
Load regulation
Line regulation(at full load)
Temperature drift(Vout)
Output Ripple**
Output Noise**
Switching frequency
Refer to products program
Refer to recommended circuit
Refer to recommended circuit
From 10% to 100% full load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
20MHz Bandwidth
100% Full load,input voltage range
1
±1.0
±3.0
±0.5
±0.2
10
±3.0
±5.0
±1.0*
±0.5
±0.03
20
85
300
50
150
W
%
%
%
%
%/°C
MV p-p
MV p-p
Khz
MICRODC reserves the copyright
* Dual output models unbalanced load (25/100%):±5%Max
* *Test ripple and noise by "parallel cable" method. See detailed operation instructions at Testing of Power
Converter section, application notes.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 3
WRA-YMD-10W
＆
WRB-YMD-10W
Series
TEMPERATURE CHARACTERISTICS
Parameter
Storage humidity range
NO-load power consumption
Operating temperature
Storage temperature
Lead temperature
Temp.rise at full load
Cooling
Case material
Short circuit protection
*
Case material
MTBF
Weight
1000
23.5
1.5mm from case for 10 seconds
40
Free air convection
Plastic(UL94-V0)
Continuous,automatic recovery
Aluminium alloy
K hours
g
-40
-55
500
85
125
300
TYPICAL CHARACTERISTICS
Min.
Typ.
Max.
95
Conditions
Units
%
MW
°C
°C
°C
°C
Temperature Derating Graph
*Supply voltage must be discontinued at the end of short circuit duration.
ISOLATION SPECIFICATIONS
Parameter
Isolation test voltage
Isolation resistance
Isolation capacitance
RECOMMENDED CIRCUIT
Min.
1500
1000
100
Test conditions
Flash tested for 1 minute and 1mA max
Test at Viso=500VDC
Input/Outpu
Typ.
Max.
Units
VDC
MΩ
pF
OUTPUT Graph
APPLICATION NOTE
1) Requirement on output load
In order to ensure the product operate efficiently and reliably, in addition to a max load (namely full
load), a minimum load is specified for this kind of DC/DC 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.
2) Recommended Circuit
All the WRA_YMD-10W & WRB_YMD-10W Series have been tested according to the following
recommended testing circuit before leaving factory. This series should be tested under load. Never be
tested under no 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: 10PF/100mA
3) Input current
When it is used in unregulated power supply,be sure that the fluctuating range of the power supply
and the rippled voltage do not exceed the module standard.Input current of power supply should afford
the startup current of this kind of DC/DC module (Figure 2).
General: Ip≤1.4*Iin-max
(VDC)
3.3
5
12
15
24
EXTERNAL CAPACITOR TABLE (TABLE 1)
Single Vout
Cout
Dual Vout
Cout
4) No parallel connection or plug and play
(μF)
2200
1000
470
330
220
(VDC)
±5
±12
±15
_
_
(μF)
680
330
220
_
_
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 3
WRA-YMD-10W
＆
WRB-YMD-10W
Series
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]
FOOTPRINT DETAILS
Pin
1
2
3
4
5
NC:No connection
Single
GND
Vin
+Vo
NC
0V
Dual
GND
Vin
+Vo
COM
-Vo
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
TUBE OUTLINE DIMENSIONS
When the environment temperature is higher than
71 , the product output power should be less
71℃,
then 60% of the rated power.
No parallel connection or plug and play.
Use dual output simultaneously,forbid pening
output pin (0V) to use as single output.
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.
Note:
Unit :mm[inch]
General tolerances:±0.50mm[±0.020inch]
L=230mm[9.055inch] Tube Quantity: 7pcs
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 3 of 3
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