WRA-ZMD-12W
＆
WRB-ZMD -12W
Series
12W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
DC-
SELECTION GUIDE
Ordercode
WRB2403ZMD-2400
WRB2412ZMD-12W
Input voltage
range
9 – 36 VDC
9 – 36 VDC
9 – 36 VDC
9 – 36 VDC
9 – 36 VDC
18 – 75 VDC
18 – 75 VDC
18 – 75 VDC
18 – 75 VDC
18 – 75 VDC
Output voltage
3,3 VDC
12 VDC
15 VDC
± 12 VDC
±15 VDC
3,3 VDC
12 VDC
15 VDC
± 12 VDC
±15 VDC
Output
current max.
2400 mA
1000 mA
800 mA
± 500 mA
± 400 mA
2400 mA
1000 mA
800 mA
± 500 mA
± 400 mA
Efficiency typ.
78 %
84 %
84 %
84 %
84 %
s
84 %
84 %
84 %
84 %
FEATURES
◆
Ultrawide 4 : 1 Input Range 9 – 36 VDC
WRB2415ZMD-12W
WRA2412ZMD-12W
WRA2415ZMD-12W
WRB4803ZMD-2400
WRB4812ZMD-12W
WRB4815ZMD-12W
WRA4812ZMD-12W
WRA4815ZMD-12W
and 18 – 75 VDC
◆
Full SMD-Design
◆
Input Filter meets EN 55022,Class A and
FCC,Level A without external Components
◆
Indefinite Short-Circuit Protection
◆
Overvoltage Protection
◆
I/O-Isolation 1500 VDC
◆
2" x 1" Metal Package
◆
Insulated Baseplate
◆
MTBF>1000Khours
Input Specifications
Input current(no load)
24 Vin models
48 Vin models
24 Vin;
24 Vin;
Input current(full load)
24 Vin;
48 Vin;
48 Vin;
48 Vin;
⑦
40 mA typ.
20 mA typ.
3.3 Vout models:
425 mA typ.
510 mA typ.
600 mA typ.
215 mA typ.
255 mA typ.
300 mA typ.
42 V max.
84 V max.
1.0 A max.
EN 55022 level A, FCC part 15, level A
5 & ±5 Vout models:
other output models:
3.3 Vout models:
5 & ±5 Vout models:
other output models:
◆Industry
Standard Pinout
◆2
Year Product Warranty
MODEL SELECTION
WRB 24 12 Z M D -12W(1000)
①Product
Series
②Input
Voltage
③Output
Voltage
④Wide
(4:1) Input Range
⑤Metal
Shield
⑥
2" x 1"
DIP Package Style
⑦Rated
Power(Output current)
①
②
③
④
⑤
⑥
Surge voltage(1 sec. max.)
Reverse voltage protection
Conducted noise (input)
24 Vin models
48 Vin models
APPLICATIONS
The WRA-ZMD-12W
＆
WRB-ZMD-12W Series series
of DC/DC converters has been designed for a wide range
of
applications
including
communications,
industrial
General Specifications
– Operating
Temperature ranges
– Case temperature
– Storage
Derating
Humidity
Reliability, calculated MTBF
Isolation voltage
Isolation capacity
Isolation resistance
Switching frequency
Remote ON/OFF (optional):
non condensing
MIL-HDBK-217 E
Input/Output
Input/Output
Input/Output (500 VDC)
fixed
ON:
OFF:
OFF idle current:
Safety standards:
– 40 °C ... + 60 °C
+ 95 °C max.
– 40 °C ... + 125 °C
above 60°C: 3% /°C
95 % rel H max.
> 700’000 h @ +25 °C
1500 VDC
200 pF typ
> 1000 M Ohm
400 kHz typ. (Pulse width modulation
PWM)
2.5 ... 5.5 VDC or open circuit.
0 ... 0.8 VDC or short circuit pin 2 and pin 6
10 mA max.
UL 1950, EN 60950, IEC 60950
Compliance up to 60 VDC input voltage
(SELV limit)
cUL/UL File E188913
systems and battery powered mobile equipments. Key
features are high power density (12W in a 2“x1“x
0.4“ package) and ultrawide input ranges of 9 – 36 VDC
and 18 –75 VDC. Other features of this converter are
internal filtering according to EN 55022, level A, safety
approval to EN 60950 and UL 1950, wide operating
temperature range and remote on/off (opt.).
Safety approvals:
MICRODC reserves the copyright
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 1/3
WRA-ZMD-12W
＆
WRB-ZMD -12W
Series
Output Specifications
Voltage set accuracy
Regulation
– Input variation Vin min. to Vin max.
– Load variation 10 – 90 %
Ripple and noise
Temperature coefficient
Output current limitation
Short circuit protection
Capacitive load
– single output models
– dual output models
20 MHz Bandwidth
±1%
± 0.5 % max.
± 0.5 % max.
50 mVpk-pk typ.
± 0.02 % / °C
>110% of Iout max. foldback
Hiccup mode, indefinite (automatic
recovery)
470 µF max.
100 µF max.
TYPICAL CHARACTERISTICS
Temperature Derating Graph
Physical Specifications
Case material
Baseplate
Potting material
Weight
Soldering temperature
Steel chrome-nickel plated
Epoxy
Silicon rubber (flammability to UL 94 V-0)
30 g (1.2 oz)
max. 250 °C / 10 sec.
RECOMMENDED CIRCUIT
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.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_ZMD-12W&WRB_ZMD-12W 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 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 capacitance of its
filter capacitor sees (Table 1).General:
Cin: 10μF-47μF
Cout: 10μF/100mA
CTRL Terminal
When open or high impedance,the converter work well; When this pin is
‘high’; the converter shutdown; It should be note that the input current (Ic)
should between 5-10mA, exceeding the maximum 20mA will cause
permanence damage to the converter.
The value of R Can be derived as follows :
Output External Capacitor Table(Table 1)
Single Vout
Cout
(μF)
680
470
330
Dual Vout
(VDC)
±5
±12
±15
Cout
(μF)
680
330
220
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≤1.6*Iin-max
No parallel connection or plug and play
(VDC)
5
12
15
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Technical enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
page 2/3
WRA-ZMD-12W
＆
WRB-ZMD -12W
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
Pin
1
2
3
4
5
NC:No connection
Single
GND
Vin
+Vo
NC
0V
Dual
GND
Vin
+Vo
0V
-Vo
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
TUBE OUTLINE DIMENSIONS
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=230mm[9.055inch] Tube Quantity: 7pcs
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:tech@microdc.cn Tel:0086-20-86000646
page 3/3
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