BP5220A Ver la hoja de datos (PDF) - ROHM Semiconductor
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BP5220A Datasheet PDF : 9 Pages
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BP5220A/BP5221A/BP5222A
Data Sheet
Circuit operation
(1) The basic application examples are shown in Fig.2.
The only external parts required are the input and
output smoothing capacitors.
Vi
(2) Switching on and off the output voltage is allowed.
The output can be switched off by making pin 4
open (high impedance). (See Fig.3)
BP5220A / BP5221A / BP5222A
9
7654321
Be sure to use fuse for safety.
+
+
(3) Fine adjustment of the output voltage is allowed.
Adjustment of the output voltage can be
performed from pin 6 via the resistor by connecting
the output terminal (pin 2) or GND. (See
application example 3)
Be sure to use fuse for safety.
Vi
+
Fig.2
BP5220A / BP5221A / BP5222A
9
7654321
SW
+
VO
Output OFF
VO
Fig.3
Application Examples
Application Example 1 : DC / DC converter with protection circuit
BP5220A / BP5221A / BP5222A
Vi
24V
9
7654321
+
VO
5V
+
+
COMP.
120pF
6
5
4
Vi = 24V
3
2
1
BA10393
0
0.2 0.4 0.6 0.8 1.0 1.2
OUTPUT CURRENT (A)
Fig.4
Fig.5
A resistor is used to limit the rise of output at power on. The resistance 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
Be sure to use fuse for safety.
BP5220A / BP5221A / BP5222A
9
7654321
Vi
+
100 F
VO
+
470 F
ON / OFF
100k
2SC1740
Fig.6
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© 2010 ROHM Co., Ltd. All rights reserved.
4/7
2010.03 - Rev. B
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