DC/DC Converter
WRB_ST/SD-1WR2 Series
1W isolated DC-DC converter
Wide input and regulated single output
FEATURES
Ultra compact DIP/SMD package
Wide 2:1 input voltage range
Operating ambient temperature range: -40℃ to
+85℃
I/O isolation test voltage: 1.5K VDC
Short circuit protection (continuous)
Industry standard pin-out
EN62368 approved
Patent Protection RoHS
WRB_ST/SD-1WR2 series of isolated 1W DC-DC converter products with a 2:1 input voltage range. The product has a ultra-compact DIP/SMD
package, operating temperature of -40℃ to +85℃ and continuous short circuit protection. The ultra-small dimension design makes the
converters an ideal solution for communications, instrumentation and industrial electronics applications.
Selection Guide
Ripple &
Noise
(mVp-p)
Typ./Max.
Input Voltage (VDC)
Output
Current (mA)
Full Load
Efficiency (%)
Min./Typ.
Max.
Capacitive
Load(µF)
②
Certification
Part No.
Nominal
①
Max.
Voltage(VDC)
(Range)
Max./Min.
WRB1203ST/SD-1WR2
WRB1205ST/SD-1WR2
WRB1212ST/SD-1WR2
WRB1215ST/SD-1WR2
WRB1224ST/SD-1WR2
WRB2403ST/SD-1WR2
WRB2405ST/SD-1WR2
WRB2412ST/SD-1WR2
WRB2415ST/SD-1WR2
WRB2424ST/SD-1WR2
3.3
5
303/15
200/10
83/4
73/75
75/77
77/79
78/80
74/76
73/75
75/77
76/78
76/78
75/77
2700
2200
1000
680
12
20
12
15
24
3.3
5
100/150
50/100
(9-18)
67/3
42/2
470
CE
303/15
200/10
83/4
2700
2200
1000
680
24
40
12
15
24
(18-36)
67/3
42/2
470
Notes: ①Exceeding the maximum input voltage may cause permanent damage;
②Ripple & noise testing condition at nominal input voltage and 5%-100% load, the “tip and barrel” method is used for ripple and noise test, please refer
to DC-DC Converter Application Notes for specific information.
Input Specifications
Item
Operating Conditions
12VDC input voltage
24VDC input voltage
12VDC input voltage
24VDC input voltage
12VDC input voltage
24VDC input voltage
12VDC input voltage
24VDC input voltage
Min.
--
Typ.
111/15
55/6
40
Unit
mA
Max.
114/30
57/10
--
Input Current (full load/no-load)
--
--
Reflected Ripple Current
Surge Voltage (1sec. max.)
Start-up Voltage
--
55
--
-0.7
-0.7
--
--
25
--
50
VDC
--
9
--
--
18
Input Filter
Hot Plug
Capacitance filter
Unavailable
Output Specifications
Item
Operating Conditions
Min.
--
Typ.
±1
Max.
±3
Unit
%
Voltage Accuracy
5%-100% load, input voltage range
3.3VDC output
Others
--
±5
±7
No-load Output Voltage Accuracy
Linear Regulation
Input voltage range
--
±1.5
±5
Input voltage variation from low to high at full
load
--
±0.2
±0.5
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