WRA-ZD-6W
＆
WRB-ZD -6W
Series
6W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
DC-
FEATURES
◆
Wide (4:1) Input Range
◆Short
Circuit Protection
(automatic recovery)
◆
1500VDC Isolation
◆
Operating Temperature:
-40℃½﹢85℃
◆
Five sided metal shielding
◆
No external component required
◆
Internal SMD construction
◆
RoHS Compliance
◆
MTBF>1000Khours
SELECTION GUIDE
Input
Order code
Nominal
WRA2405ZD-6W
WRA2412ZD-6W
WRA2415ZD-6W
WRB2403ZD-6W
WRB2405ZD-6W
WRB2412ZD-6W
WRB2415ZD-6W
WRA4805ZD-6W
24
24
24
24
24
24
24
48
48
48
48
48
48
48
Voltage(VDC)
Range
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
Max*
40
40
40
40
40
40
40
80
80
80
80
80
80
80
Voltage
(VDC)
Output
Efficiency
Current(mA)
(%.Typ.)
Max.
Min.
±60
±25
±20
150
120
50
40
±60
±25
±20
150
120
50
40
76
81
83
74
76
81
81
85
83
85
74
78
80
80
±5
±12
±15
3.3
5
12
15
±5
±12
±15
3.3
5
12
15
±600
±250
±200
1500
1200
500
400
±600
±250
±200
1500
1200
500
400
MODEL SELECTION
WRB
①
24
②
12
③
Z
④
D
⑤
-6W
⑥
①Product
Series
③Output
Voltage
⑤DIP
Package Style
②Input
Voltage
④Wide
(4:1) Input Range
⑥
Rated Power
WRA4812ZD-6W
WRA4815ZD-6W
WRB4803ZD-6W
WRB4805ZD-6W
WRB4812ZD-6W
APPLICATIONS
WRB4815ZD-6W
The WRA_ZD-6W&WRB_ZD-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.
*Input voltage can’t exceed this value,or will cause the permanent damage.
COMMON SPECIFICATIONS
Parameter
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Cooling
Short circuit protection
1.5mm from case for 10 seconds
Conditions
Min.
Typ.
Max.
95
Units
%
℃
℃
℃
-40
-55
40
85
125
300
℃
Free Air Convection
Continuous,automatic recovery
Steel,nickel plated, plastic
Tested for1 minute and 1mA max
Case material
Isolation voltage
Isolation resistance
Isolation Capacitance
MTBF
1500
1000
1000
1000
17
VDC
MΩ
pF
K hours
g
Test at 500VDC
MICRODC reserves the copyright
Weight
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 1/3
WRA-ZD-6W
＆
WRB-ZD -6W
Series
TEMPERATURE CHARACTERISTICS
Parameter
Output power
Positive voltage accuracy
Negative voltage accuracy
Load regulation
Line regulation
Temperature drift (Vout)
Ripple**
Noise**
Switching frequency
TYPICAL CHARACTERISTICS
Typ.
Max.
6
±1
±3
±0.5
±0.2
±0.02
20
50
300
50
100
±3
±5
±2*
±0.5
Conditions
See below products program
Refer to recommended circuit
Refer to recommended circuit
Form 10% to 100% load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
20MHz Bandwidth
100% load, input voltage range
Min.
0.6
Units
W
%
%
%
%
%/℃
mVp-p
mVp-p
KHz
Temperature Derating Graph
RECOMMENDED CIRCUIT
* 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.
Output Graph
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
the actual
load.If
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-6W&WRB_ZD-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.
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≤1.6*Iin-max
No parallel connection or plug and play
Single Vout
Cout
(μF)
2200
1000
470
330
Dual Vout
(VDC)
±5
±12
±15
--
Cout
(μF)
680
330
220
--
(VDC)
3.3
5
12
15
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 2/3
WRA-ZD-6W
＆
WRB-ZD -6W
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
RECOMMENDED FOOTPRINT
Top view grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
TUBE OUTLINE DIMENSIONS
Pin
2、3
9
11
14
16
22、23
NC:No connection
Single
GND
NC
NC
+Vo
0V
Vin
Dual
GND
0V
-Vo
+Vo
0V
Vin
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:
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.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 3/3
