WRA-ZD-1W5&WRB-ZD-1W5
Series
1.5W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
SELECTION GUIDE
Input
Order code
Nominal
WRA2405ZD-1W5
24
24
24
24
24
24
24
24
48
48
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
18-72
18-72
Max.
*
40
40
40
40
40
40
40
40
80
80
80
80
80
80
80
80
No-load
(mA)(typ.)
16
16
16
16
16
16
16
16
8
8
8
8
8
8
8
8
Voltage
(VDC)
±5
±12
±15
3.3
5
9
12
15
±5
±12
±15
3.3
5
9
12
15
Output
Current(mA)
Max.
±150
±63
±50
455
300
167
125
100
±150
±63
±50
455
300
167
125
100
Min.
±15
±6
±5
45
30
17
12
10
±15
±6
±5
45
30
17
12
10
Efficiency
(%,Typ)
74
78
79
72
74
76
78
80
74
78
80
72
74
76
78
80
FEATURES
◆
DIP24 package
◆
Wide input voltage range(4:1)
◆
Operating temperature: -40℃ ~ +85℃
◆
1500VDC Input/Output isolation
◆
Short circuit protection(automatic recovery)
◆
Internal SMD construction
◆
No external component required
◆
No heat sink required
◆
Industry standard pinout
◆
Five-sided shielding package
◆
MTBF>1,000,000 hours
WRA2412ZD-1W5
WRA2415ZD-1W5
WRB2403ZD-1W5
WRB2405ZD-1W5
WRB2409ZD-1W5
WRB2412ZD-1W5
WRB2415ZD-1W5
WRA4805ZD-1W5
WRA4812ZD-1W5
WRA4815ZD-1W5
WRB4803ZD-1W5
WRB4805ZD-1W5
WRB4809ZD-1W5
WRB4812ZD-1W5
WRB4815ZD-1W5
◆RoHS
Compliance
* Input voltage over it may cause permanent damage to the device.
MODEL SELECTION
WRA
①
24
②
12
③
Z
④
D
⑤
-1W5
⑥
①Product
Series
③Output
Voltage
⑤DIP24
Package
②Input
Voltage
④Wide
(4:1) Input Range
⑥Rated
Power
COMMON SPECIFICATIONS
Parameter
Test conditions
Min.
-40
-55
15
1.5mm from case for 10 seconds
Free air convection
Plastic(UL94-V0)
or
Stainless steel
300
Typ.
Max.
95
85
125
Units
%
℃
℃
℃
℃
APPLICATIONS
The
WRA_ZD-1W5&WRB_ZD-1W5
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 humidity
Operating temperature
Storage Temperature
Temp. rise at full load
Lead temperature
Cooling
Case material
Short circuit protection
MTBF
Weight
Continuous, automatic recovery
1000
15
K hours
g
ISOLATION SPECIFICATIONS
Parameter
Isolation voltage
Isolation resistance
Isolation capacitance
Test conditions
Tested for 1 minute and 1mA 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-ZD-1W5&WRB-ZD-1W5
Series
ISOLATION SPECIFICATIONS
Parameter
Output power
Positive voltage accuracy
Negative voltage accuracy
Load regulation
Line regulation
Temperature drift
Ripple**
Noise**
Switching frequency
TYPICAL CHARECTERISTICS
Min.
0.15
±1
±3
±0.5
±0.2
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
20MHz Bandwidth
100% load, input voltage range
Typ.
Max
1.5
±3
±5
±2*
±0.75
±0.03
Units
W
%
%
%
%
%/℃
mVp-p
mVp-p
KHz
20
50
300
50
100
* 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 (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
load.
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_ZD-1W5&WRB_ZD-1W5 Series have been tested according to the following
recommended testing circuit before leaving factory. (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).If you want to use the products in high EMI, please
choose our metal packaged products (WRA_ZD-1W5 & WRB_ZD-1W5). General:
Cin:
24V&48V
10µF~47µF
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. (See 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-ZD-1W5&WRB-ZD-1W5
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.
Operation under 10% load will not damage the converter; However, they may not meet all specification listed.
3. All specifications measured at Ta=25℃, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
4.
5.
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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