WRA-ZS-3W
＆
WRB-ZS -3W
Series
3W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
DC-
SELECTION GUIDE
Input
Order code
Nominal
Voltage(VDC)
Range
Voltage
(VDC)
Output
Efficiency
Current(mA)
(%.Typ.)
Max.
FEATURES
◆
Wide (4:1) Input Range
◆Short
Circuit Protection
(automatic recovery)
◆
1500VDC Isolation
◆
Operating Temperature:
-40℃½﹢85℃
◆
Excellent load and line regulation
◆
Ultra-compact SIP-8 packaged
◆
Internal SMD construction
WRB2403ZS-3W
WRB2405ZS-3W
WRB2412ZS-3W
WRB2415ZS-3W
WRA2405ZS-3W
WRA2412ZS-3W
WRA2415ZS-3W
WRB4803ZS-3W
WRB4805ZS-3W
24
24
24
24
24
24
24
48
48
48
48
48
48
48
9-36
9-36
9-36
9-36
9-36
9-36
9-36
18-75
18-75
18-75
18-75
18-75
18-75
18-75
3.3
5
12
15
±5
±12
±15
3.3
5
12
15
±5
±12
±15
700
600
250
200
±300
±125
±100
700
600
250
200
±300
±125
±100
81
83
74
76
81
81
85
83
85
74
78
80
80
85
◆
Remote On/Off control
◆
Small footprint:21.8*9.2mm
◆
Excellent load and line regulation
WRB4812ZS-3W
WRB4815ZS-3W
WRA4805ZS-3W
WRA4812ZS-3W
WRA4815ZS-3W
NOTE:
MODEL SELECTION
①
②
③ ④
⑤
⑥
WRB 24 12 Z S -3W
①Product
Series
②Input
Voltage
③Output
Voltage
④Wide
(4:1) Input Range
⑤SIP
Package Style
⑥
Rated Power
Case material:non-conductive plastic
Weight: 4.8g (0.17oz)
APPLICATIONS
Input Specifications
Parameter
Input current at full load
The WRA_ZS-3W&WRB_ZS-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.
Conditions
24Vin models:
48 Vin models:
Max.
170mAmax.
85mAmax.
50Vmax.
100Vmax.
25mA typ.
Surge voltage
(100 msec. max.)
Input current at no load
Input filter
24 Vin models:
48 Vin models:
24 Vin models:
48 Vin models: part typ.
EN 55022 level A, FCC15mA15, level A
with external capacitor
The WR-ZS-3W series is a new family of isolated 3W DC/DC converters with regu-
lated output, featuring ultra-wide 4:1 input voltage range. The product comes in a
ultra-compact SIP plastic package with a small footprint occupying only 2.0 cm2
(0.3 square in.) of board space. An excellent effciency allows –40° to +85°C operation
40°
+85°
temperatures.
Further features include remote On/Off control and continuous short circuit protec-
tion. The very compact dimensions of these converters make them an ideal solution
MICRODC reserves the copyright
for many space critical applications in battery-powered equipment and instrumen-
tation.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 3
WRA-ZS-3W
＆
WRB-ZS -3W
Series
Output Specifications
Parameter
Voltage set accuracy
Regulation
– Input variation
Vin min. to Vin max.
single output models:
dual output models:
– Load cross regulation 25/100%
Minimum load
Temperature coefficient
Ripple and noise (20 MHz Bandwidth)
Conditions
± 1 % max
0.2 % max.
1.0% max.
1.0 % max. balanced load
5.0 % max. (dual output models)
not required
0.1 %/K
30 mVpk-pk max.
–
Power On
–
Remote On
30 ms typ.
30 ms typ.
500 µs typ
– Load variation 5 – 100%
Start up time
(constant resistive load)
Transient response setting time
(25% load step change)
Temperature coefficient
Short circuit protection
Capacitive load
± 0.1 %/°C
continuous, automatic recovery
3.3 VDC output models:
5 VDC output models:
12 VDC output models:
15 VDC output models:
±5
VDC output models:
±12
VDC output models:
±15
VDC output models:
1‘760 µF max.
1’000 µF max.
170 µF max.
110 µF max.
± 470 µF max.
± 100 µF max.
± 47 µF max.
Casematerial
General Specifications
Parameter
Temperature ranges
–
Operating
–
Case temperature
–
Storage
Load derating
Humidity (non condensing)
Reliability, calculated MTBF
(MIL-HDBK-217F ground benign)
Isolation voltage (60 sec)
Isolation capacity
Isolation resistance
Switching frequency
Remote On/Off
–
On:
–
Off:
–
Off stand by input current
Vibration and thermal shock
Safety standards
Safety approvals
–
UL/cUL
–
Input/Output
–
Input/Output
–
Input/Output (500 VDC)
1’500 VDC
200 pF max.
>1 GOhm
100 kHz (PWM)
open or high impedance
2...4 mA current applied via 1KOhm resistor
2.5 mA max.
MIL-STD-810E
UL /cUL 60950-1, EN 60950-1, IEC 60950-1
pending
Conditions
– 40 °C½ + 85 °C (no derating)
+100 °C max.
– 55 °C
½
+ 125 °C
3.5 %/K above 70°C
95 % rel. H max.
>1.7Mio h @ 25°C
Case
specifcations valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
All
materi
+25°
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 3
WRA-ZS-3W
＆
WRB-ZS -3W
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
1
2
3
5
6
7
8
Single
-Vin(GND)
+Vin(Vcc)
Remote On/Off
No function
+Vout
-Vout
No function
Dual
-Vin(GND)
+Vin(Vcc)
Remote On/Off
No function
+Vout
Common
-Vout
Note:specifications can be changed any time without notice.
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.
Note:
Unit :mm[inch]
General tolerances:±0.50mm[±0.020inch]
L=530mm[20.866inch] Tube Quantity: 22pcs
Note:
L=220mm[8.661inch] Tube Quantity:8pcs
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 of 3
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