WRA-ZMD-6W&WRB-ZMD-6W
Series
6W, 4:1 WIDE INPUT, ISOLATED & REGULATED DUAL & SINGLE OUTPUT DC-DC CONVERTER
SELECTION GUIDE
Input
Order code
Nominal
WRA2405ZMD-6W
WRA2412ZMD-6W
WRA2415ZMD-6W
WRA2424ZMD-6W
WRB2405ZMD-6W
WRB2412ZMD-6W
WRB2415ZMD-6W
24
24
24
24
24
24
24
24
48
48
48
48
48
48
Voltage(VDC)
Range
9-36
9-36
9-36
9-36
9-36
9-36
9-36
9-36
18-72
18-72
18-72
18-72
18-72
18-72
Max.
*
40
40
40
40
40
40
40
40
80
80
80
80
80
80
Voltage
(VDC)
±5
±12
±15
±24
5
12
15
24
±5
±12
±15
5
12
15
Output
Current(mA)
Max.
±600
±250
±200
±125
1200
500
400
250
±600
±250
±200
1200
500
400
Min.
±60
±25
±20
±13
120
50
40
25
±60
±25
±20
120
50
40
Efficiency
(%,Typ)
80
82
84
82
80
82
84
82
80
82
84
80
82
84
FEATURES
◆
DIP package
◆
1500VDC isolation
◆
Short circuit protection (automatic recovery)
◆
Operating temperature: -40℃ to +85℃
◆
Internal SMD construction
◆
Metal shielding package
◆
Industry standard pinout
◆
No heat sink required
◆
MTBF>1,000,000 hours
◆
RoHS Compliance
WRB2424ZMD-6W
WRA4805ZMD-6W
WRA4812ZMD-6W
WRA4815ZMD-6W
WRB4805ZMD-6W
WRB4812ZMD-6W
WRB4815ZMD-6W
*Input voltage can't exceed this value, or will cause the permanent damage.
MODEL SELECTION
WRA
①
24
②
05
③
Z
④
M
⑤
D
⑥
-6W
⑦
①Product
Series
③Output
Voltage 1st
⑤Metal
Shield
⑦Rated
Power
②Input
Voltage
④Wide
(4:1) Input Range
⑥DIP
Package Style
COMMON SPECIFICATIONS
Parameter
Storage humidity
Operating temperature
-40
-55
40
1.5mm from case for 10 seconds
300
Free air convection
Continuous, automatic recovery
Aluminum
1000
15
K hours
g
Test conditions
Min.
Typ.
Max.
95
85
125
Units
%
℃
℃
℃
℃
APPLICATIONS
The WRA_ZMD-6W & WRB_ZMD-6W 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≤4:1);
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.
Storage temperature
Temp. rise at full load
Lead temperature
Cooling
Short circuit protection
Case material
MTBF
Weight
ISOLATION SPECIFICATIONS
Parameter
Isolation voltage
Isolation resistance
Isolation capacitance
Test conditions
Tested for 1 minute and 1 mA max
Test at 500VDC
Input/Output, 100KHz/1V
Min.
1500
1000
Typ.
Max.
Units
VDC
MΩ
100
pF
MICRODC reserves the copyright
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 3
WRA-ZMD-6W&WRB-ZMD-6W
Series
OUTPUT SPECIFICATIONS
Parameter
Output power
Line regulation (at full load)
Load regulation
Positive output voltage accuracy
Negative output voltage accuracy
Temperature Drift (Vout)
Ripple**
Noise**
Switching frequency
TYPICAL TEMPERATURE CURVE
Min.
0.6
±0.2
±0.5
±1
±3
±0.02
30
75
300
50
150
Test conditions
See above products program
Input voltage from low to high
Form 10% to 100%load
Refer to recommended circuit
Refer to recommended circuit
Refer to recommended circuit
20MHz Bandwidth
20MHz Bandwidth
100% load, input voltage range
Typ.
Max
6
±0.5
±2*
±3
±5
Units
W
%
%
%
%
%/℃
mVp-p
mVp-p
KHz
* 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.
APPLICATION NOTE
1) Requirement on output load
In order to ensure the product operate efficiently and reliably, in addition to a max load (namelyull 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.
RECOMMENDED CIRCUIT
2) Recommended Circuit
All the WRA_ZMD-6W & WRB_ZMD-6W 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 should not be too high, or may cause start-up
problem. 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:
Cout:
24V&48V
10µF/100mA
10µF~47µF
3) 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
4) No parallel connection or plug and play
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 3
WRA-ZMD-6W&WRB-ZMD-6W
Series
OUTLINE DIMENSIONS
＆
FOOTPRINT DETAILS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT(TOP VIEW)
TUBE OUTLINE DIMENSIONS
Note:
1. The load shouldn't be less than 10%, otherwise ripple will increase dramatically.
2.
3.
Operation under 10% load will not damage the converter; However, they may not meet all specification listed.
Capacitor MAX load tested at input voltage range and full load.
4. All specifications measured at Ta=25℃, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
5.
6.
In this datasheet, all the test methods of indications are based on corporate standards.
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.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 3 of 3
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