WRE-YD-3W&WRF-YD-3W
Series
3W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
PRODUCT PROGRAM
Input
Part
Number
Nominal
Voltage(VDC)
Range
Max*
Voltage
(VDC)
Output
Current(MA)
Max
Min
Efficiency
(%,Typ)
WRE1205YD-3W
12
12
12
12
12
12
12
12
24
24
24
24
24
24
24
24
48
48
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
22
22
22
22
22
22
22
22
40
40
40
40
40
40
40
40
80
80
±5
±12
±15
5
9
12
15
24
±5
±9
±12
±15
5
9
12
15
5
12
±300
±125
±100
600
333
250
200
125
±300
±167
±125
±100
600
333
250
200
600
250
200
±30
±12
±10
60
33
25
20
12
±30
±16
±12
±10
60
33
25
20
60
25
20
74
78
79
74
76
78
77
80
77
78
79
80
77
78
79
80
77
79
80
FEATURES
◆
DIP24 package
◆
Efficiency up to 80%
◆
Operating temperature: -40℃ ~ +85℃
◆
Short circuit protection ( automatic
WRE1212YD-3W
WRE1215YD-3W
WRF1205YD-3W
WRF1209YD-3W
WRF1212YD-3W
WRF1215YD-3W
WRF1224YD-3W
WRE2405YD-3W
WRE2409YD-3W
WRE2412YD-3W
WRE2415YD-3W
WRF2405YD-3W
WRF2409YD-3W
WRF2412YD-3W
WRF2415YD-3W
recovery)
◆
3KVDC isolation
◆
No external component required
◆
Internal SMD construction
◆
Industry standard pinout
◆
MTBF>1,000,000 hours
◆
UL94-V0 Package
◆
RoHS Compliance
WRF4805YD-3W
WRF4812YD-3W
WRF4815YD-3W
48
36-72
80
15
*Input voltage can exceed this value, or will cause the permanent damage.
MODEL SELECTION
WRE 12 05 Y D -3W
①Product
Series
③Output
Voltage
⑤DIP
Package Style
①
②
③
④
⑤
⑥
ISOLATION SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
②Input
Voltage
④Wide
(2:1) Input Range
⑥Rated
Power
Isolation voltage
Isolation resistance
Tested for 1 minute and 1mA max
Test at 500VDC
3000
1000
VDC
MΩ
DESCRIPTION
The WRE_YD-3W&WRF_YD-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
≤3000VDC);
3) Where the regulation of the output voltage
and the output ripple noise are demanded.
OUTPUT SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Cooling
Short circuit protection
Case material
MTBF
Weight
Test Conditions
-40
-55
15
1.5mm from case for 10 seconds
95
85
125
%
℃
℃
℃
300
Free air convection
℃
Continuous, automatic recovery
Plastic (UL94-V0)
1000
17
K hours
g
MICRODC reserves the copyright
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 3
WRE-YD-3W&WRF-YD-3W
Series
COMMON SPECIFICATIONS
Item
Output power
Positive voltage accuracy
Negative voltage accuracy
Load regulation
Line regulation(at full load)
Temperature Drift(Vout)
Ripple & Noise **
Switching frequency
Test Conditions
See above products program
Refer to recommended circuit
Refer to recommended circuit
From 10% to 100% load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
100% load, input voltage range
50
300
Min.
0.3
±1
±3
±0.5
±0.2
Typ.
Max.
3
±3
±5
±1*
±0.5
±0.03
100
Units
W
%
%
%
%
%/℃
mVp-p
KHz
TYPICAL CHARACTERISTICS
* Dual output models unbalanced load:
±5%.
**Test ripple and noise by "parallel cable" method. See detailed operation instructions at Testing of Power
Converter section, application notes.
*Supply voltage must be discontinued at the end of short circuit duration.
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
RECOMMENDED CIRCUIT
an appropriate resistor as extra loading, or contact our company for other lower output power products.
2) Recommended Circuit
All the WRE_YD-3W & WRF_YD-3W 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 Input
Voltage capacitance of its filter capacitor sees (Table 1).
General: Cin:
12V
100µF
10µF-47µF
24V&48V
Cout: 10µF/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
4) No parallel connection or plug and play
EXTERNAL CAPACITOR TABLE (TABLE 1)
Output External Capacitor Table (Table 1)
Single Vout
(VDC)
Cout
(uF)
Dual Vout
(VDC)
Cout
(uF)
5
9
12
15
24
1000
680
470
330
220
±5
±9
±12
±15
-
680
470
330
220
-
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 3
WRE-YD-3W&WRF-YD-3W
Series
OUTLINE DIMENSIONS
＆
FOOTPRINT DETAILS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT(TOP VIEW)
TUBE OUTLINE DIMENSIONS
RoHS COMPLIANT INFORMATION
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.
Microdc Professional Power Module,Inc.
Tel:0086-20-86000646
E-mail:tech@microdc.cn
Website:http://www.microdc.cn
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.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 3 of 3
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