WR-ZD-3W

WRA-ZD-3W&WRB-ZD-3W Series
3W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
SELECTION GUIDE
FEATURES
Input
◆Wide (4:1) Input Range
Output
Efficiency
◆Short Circuit Protection(automatic recovery)
Order code
◆Five sided metal shielding
◆No external component required
◆Internal SMD construction
No-load
Voltage
Current(mA)
(%.Typ.)
Nominal
Range
Max*
(mA)(typ)
(VDC)
Max.
Min.
WRA2405ZD-3W
24
9-36
40
16
±5
±300
±30
76
WRA2412ZD-3W
24
9-36
40
16
±12
±125
±12
81
WRA2415ZD-3W
24
9-36
40
16
±15
±100
±10
83
WRB2403ZD-900
24
9-36
40
16
3.3
900
90
76
◆1500VDC Isolation
◆Operating Temperature: -40℃~﹢85℃
Voltage(VDC)
WRB2403ZD-3W
24
9-36
40
16
3.3
909
91
74
◆RoHS Compliance
WRB2405ZD-3W
24
9-36
40
16
5
600
60
76
◆MTBF>1000Khours
WRB2412ZD-3W
24
9-36
40
16
12
250
25
81
WRB2415ZD-3W
24
9-36
40
16
15
200
20
81
WRA4805ZD-3W
48
18-72
80
8
±5
±300
±30
85
WRA4812ZD-3W
48
18-72
80
8
±12
±125
±12
83
WRA4815ZD-3W
48
18-72
80
8
±15
±100
±10
85
WRB4803ZD-3W
48
18-72
80
8
3.3
909
91
74
WRB4805ZD-3W
48
18-72
80
8
5
600
60
78
WRB4812ZD-3W
48
18-72
80
8
12
250
25
80
WRB4815ZD-3W
48
18-72
80
8
15
200
20
80
Typ.
Max.
Units
95
%
MODEL SELECTION
WRB①24②12③Z④ D⑤-3W
3W(250)
(250)⑥
①Product Series
②Input Voltage
③Output Voltage
④Wide (4:1) Input Range
⑤DIP Package Style
⑥Rated Power(Output current)
APPLICATIONS
The WRA_ZD-3W&WRB_ZD-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≤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.
COMMON SPECIFICATIONS
Parameter
Conditions
Min.
Storage humidity
Operating temperature
-40
85
℃
Storage temperature
-55
125
℃
Lead temperature
Free Air Convection
Short circuit protection
Continuous,automatic recovery
Steel,nickel plated, plastic
Isolation voltage
Tested for1 minute and 1mA max
1500
Isolation resistance
Test at 500VDC
1000
MΩ
1000
Weight
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VDC
1000
Isolation Capacitance
MTBF
℃
300
1.5mm from case for 10 seconds
Cooling
Case material
MICRODC reserves the copyright
℃
15
Temp. rise at full load
Technical Enquiries-Email:[email protected] Tel:0086-20-86000646
pF
K hours
15
g
page 1/3
WRA-ZD-3W&WRB-ZD-3W Series
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Output power
See below products program
0.3
Positive voltage accuracy
Refer to recommended circuit
Negative voltage accuracy
TYPICAL CHARACTERISTICS
Typ.
Max.
Units
3
W
±1
±3
%
Refer to recommended circuit
±3
±5
%
Load regulation
Form 10% to 100% load
±0.5
±1*
%
Line regulation
Input voltage from low to high
±0.2
±0.5
%
Temperature drift (Vout)
Refer to recommended circuit
±0.03
%/℃
Ripple**
20MHz Bandwidth
75
150
mVp-p
Noise**
20MHz Bandwidth
75
150
mVp-p
Switching frequency
100% load, input voltage range
300
KHz
Temperature Derating Graph
RECOMMENDED CIRCUIT
* Dual output models unbalanced load: ±5%.
Output Graph
** Test ripple and noise by “parallel cable” method. See detailed operation instructions at
Testing of Power Converter section, application notes.
APPLICATION NOTE
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.
Recommended Circuit
All the WRA_ZD-3W&WRB_ZD-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 should not be too high, or may cause start-up problem.
General:
Cin: 24V&48V 10μF-47μF
Cout: 10μF/100mA
Input current
Output External Capacitor Table(Table 1)
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
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Single Vout
Cout
Dual Vout
Cout
(VDC)
(μF)
(VDC)
(μF)
3.3
2200
±5
680
5
1000
±12
330
12
470
±15
220
15
330
--
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page 2/3
WRA-ZD-3W&WRB-ZD-3W Series
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT
RECOMMENDED FOOTPRINT
Top view grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
Note:
Unit:mm[inch]
Pin section tolerances:±0.10mm[±0.004inch]
General tolerances:±0.25mm[±0.010inch]
TUBE OUTLINE DIMENSIONS
FOOTPRINT DETAILS
Pin
Single
Dual
2、3
GND
GND
9
NC
0V
10、15
NC
NC
11
NC
-Vo
14
+Vo
+Vo
16
0V
0V
22、23
Vin
Vin
NC:No connection
When the environment temperature is higher than
71
71℃,, the product output power should be less
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:
Note:
Unit :mm[inch]
General tolerances:±0.50mm[±0.020inch]
L=530mm[20.866inch] Tube Quantity: 15pcs
L=220mm[8.661inch] Tube Quantity: 6pcs
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.
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Technical Enquiries-Email:[email protected] Tel:0086-20-86000646
page 3/3