WRA-ZMD-12W

WRA-ZMD-12W&WRB-ZMD -12W Series
12W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC
DC--DC CONVERTER
SELECTION GUIDE
Order code
Input voltage
range
Output voltage
Output
current max.
Efficiency typ.
WRB2403ZMD-2400
9 – 36 VDC
3,3 VDC
2400 mA
78 %
WRB2412ZMD-12W
9 – 36 VDC
12 VDC
1000 mA
84 %
WRB2415ZMD-12W
9 – 36 VDC
15 VDC
800 mA
84 %
WRA2412ZMD-12W
9 – 36 VDC
± 12 VDC
± 500 mA
84 %
WRA2415ZMD-12W
9 – 36 VDC
±15 VDC
± 400 mA
84 %
WRB4803ZMD-2400
18 – 75 VDC
3,3 VDC
2400 mA
85 %
WRB4812ZMD-12W
18 – 75 VDC
12 VDC
1000 mA
84 %
WRB4815ZMD-12W
18 – 75 VDC
15 VDC
800 mA
84 %
Input Filter meets EN 55022,Class A and FCC,
WRA4812ZMD-12W
18 – 75 VDC
± 12 VDC
± 500 mA
84 %
Level A without external Components
WRA4815ZMD-12W
18 – 75 VDC
±15 VDC
± 400 mA
84 %
FEATURES
Ultrawide 4 : 1 Input Range 9 – 36 VDC and
◆
8 – 75 VDC
Full SMD-Design
◆
◆
Indefinite Short-Circuit Protection
◆
Overvoltage Protection
◆
I/O-Isolation 1500 VDC
Input Specifications
2" x 1" Metal Package
Input current(no load)
◆
◆
24 Vin models
40 mA typ.
48 Vin models
Insulated Baseplate
◆
MTBF>1000Khours
◆
Input current(full load)
Industry Standard Pinout
◆
2 Year Product Warranty
◆
MODEL SELECTION
①
②
③ ④
⑤ ⑥
⑦
WRB 24 12 Z M D -12W(1000)
①Product Series ②Input Voltage
③Output Voltage ④Wide (4:1) Input Range
⑤Metal Shield
⑥2" x 1"DIP Package Style
⑦Rated Power(Output current)
Surge voltage(1 sec. max.)
20 mA typ.
24 Vin;
3.3 Vout models:
425 mA typ.
24 Vin;
5 & ±5 Vout models:
510 mA typ.
24 Vin;
other output models:
600 mA typ.
48 Vin;
3.3 Vout models:
215 mA typ.
48 Vin;
5 & ±5 Vout models:
255 mA typ.
48 Vin;
other output models:
300 mA typ.
24 Vin models
42 V max.
48 Vin models
84 V max.
Reverse voltage protection
1.0 A max.
Conducted noise (input)
EN 55022 level A, FCC part 15, level A
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 systems and battery
powered mobile equipments. Key features are
high power density(12W in a 2"x1"x0.4" 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.).
General Specifications
Temperature ranges
– 40 °C ... + 60 °C
– Case temperature
+ 95 °C max.
– Storage
– 40 °C ... + 125 °C
Derating
above 60°C: 3% /°C
Humidity
non condensing
95 % rel H max.
Reliability, calculated MTBF
MIL-HDBK-217 E
> 700’000 h @ +25 °C
Isolation voltage
Input/Output
1500 VDC
Isolation capacity
Input/Output
200 pF typ
Isolation resistance
Input/Output (500 VDC)
Switching frequency
fixed
> 1000 M Ohm
400 kHz typ. (Pulse width modulation
PWM)
Remote ON/OFF (optional):
ON:
2.5 ... 5.5 VDC or open circuit.
OFF:
0 ... 0.8 VDC or short circuit pin 2 and pin 6
OFF idle current:
10 mA max.
MICRODC RESERVES THE COPYRIGHT
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– Operating
Safety standards:
UL 1950, EN 60950, IEC 60950
Compliance up to 60 VDC input voltage
(SELV limit)
Safety approvals:
cUL/UL File E188913
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WRA-ZMD-12W&WRB-ZMD -12W Series
TYPICAL CHARACTERISTICS
Output Specifications
Voltage set accuracy
Regulation
Ripple and noise
Temperature Derating Graph
±1%
– Input variation Vin min. to Vin max.
± 0.5 % max.
– Load variation 10 – 90 %
± 0.5 % max.
20 MHz Bandwidth
50 mVpk-pk typ.
Temperature coefficient
± 0.02 % / °C
Output current limitation
– single output models
>110% of Iout max. Fold back
Hiccup mode, indefinite (automatic
recovery)
470 µF max.
– dual output models
100 µF max.
Short circuit protection
Capacitive load
Physical Specifications
Case material
Steel chrome-nickel plated
Baseplate
Epoxy
Potting material
Silicon rubber (flammability to UL 94 V-0)
Weight
30 g (1.2 oz)
Soldering temperature
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)
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
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2
Single Vout
Cout
Dual Vout
Cout
(VDC)
(μF)
(VDC)
(μF)
5
680
±5
680
12
470
±12
330
15
330
±15
220
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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]
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
diameter:1.00mm(0.039inch)
FOOTPRINT DETAILS
TUBE OUTLINE DIMENSIONS
Pin
Single
Dual
1
GND
GND
2
Vin
Vin
3
+Vo
+Vo
4
NC
0V
5
0V
-Vo
NC:No connection
When the environment temperature is higher than 71℃, the
product output power should be less then 60% of the rated
power.
Unit :mm[inch]
No parallel connection or plug and play.
General tolerances:±0.50mm[±0.020inch]
Use dual output simultaneously,forbid pening output pin (0V)
to use as single output.
L=230mm[9.055inch] Tube Quantity: 7pcs
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°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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