Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b
1.5Watt BLA05 Series
7-4 Activation and deactivation voltage
The activation voltage and deactivation voltage of this product varies according to the ambient
temperature. Refer to the following table.
Range of activation and
Ambient temperature
deactivation voltage
-40 to 0°C
0 to 85
2.2 to 3.15V
1.5 to 2.9V
7-5 Minimum input voltage
The minimum input voltage of this product varies according to the ambient temperature. Refer to the
following table.
Ambient temperature
-40 to 0°C
Minimum input voltage
3.2V
3.0V
0 to 85°C
8. Protection against reverse connection of input power supply (example)
This product will be damaged if erroneously connected with reverse input polarity. To cope with possible
reverse connection, add a protection circuit as shown in the following figure.
The following is an example using a fuse and a diode.
Fuse
+Vin
+Vout
1
2
7
5
BLA-S
Series
D1
C1
C2
C3
+Vin
Load
-Vin
-Vout
9. Common mode noise reduction method (example)
To reduce common mode noise of this product, connect a capacitor of 1000pF or so (C4) between
primary and secondary terminals as follows. In this case, note that using a capacitor of too much
capacitance may result in the increase of coupling capacitance between primary and secondary
terminals.
Fuse
+Vin
+Vout
1
7
BLA-S
Series
Load
+Vin
D1
C1
C2
C3
-Vin
-Vout
2
5
C4
9
DC-DC Converter
BDD20170524_C01
BELLNIX [ Bellnix ]
