BP5222 Ver la hoja de datos (PDF) - ROHM Semiconductor
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Lista de partido
BP5222 Datasheet PDF : 8 Pages
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BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
Circuit operation
(1) The basic application examples are shown in Fig.2.
The externally installed parts are only the input and
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
output smoothing capacitors.
9
7654321
Be sure to use
VO
(2) Switching on and off the output voltage is allowed.
fuse for safety
VIN
The output can be switched off by making pin 4 to
+
100µF
+
470µF
be open (high impedance). (See Fig.3)
(3) Fine adjustment of the output voltage is allowed.
The fine adjustment of output voltage can be
performed from pin 6 via the resistor by connecting
the output terminal (pin 2) or GND.(See application
example3)
Fig.2
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
9
Be sure to use
VIN fuse for safety
7654321
SW
OUTPUT
OFF
VO
+
100µF
+
470µF
Fig.3
Application example
Application example 1 : DC / DC converter with a protection circuit
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
6
VIN
9
7654321
VO
5
24V
0.22Ω
5V
+
+
4
100µF
470µF
2.2MΩ
3
120pF
2
+
COMP−.
1
VIN =24V
BA10393
0
0.2 0.4 0.6 0.8 1.0 1.2
OUTPUT CURRENT (A)
Fig.4
Fig.5
A resistor to secure the rise of output at power on. The resistance to be selected depends on the input voltage.
This is a standard application. Because the control current fluctuates with variations in circuits and components,
set the control current by adding a sufficient margin to the normal current level.
Application example 2 : Output ON / OFF control
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
9
7654321
Be sure to use
fuse for safety
VIN
+
100µF
VO
+
470µF
ON / OFF
100kΩ
2SC1740
Fig.6
4/8
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