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
Operation notes
(1) No circuit is installed in the modules to protect against excessive output currents. Therefore, take physical
safety measures such as using a fuse if short-circuit loading is probable.
(2) The output current should be reduced according to an increase in the input voltage or ambient temperature.
Use the modules within the derating curve range.
(3) A large rush current may flow in the module when the input voltage is applied or the output ON / OFF is
controlled with pin 4 without a capacitor such as C1 in application 4. Operating within the safe operation
ranges shown in Fig.12, 15, and 18.
The safe operation range is determined by the safe operation range of the internal switching transistor.
The amount of rush current depends on the output impedance of the input power supply and capacitors
connected to the module outputs. The pulse load on the internal switching transistor at the start of operation
can be reduced by using the protection circuit in application 1 or the slow start circuit in application 4.
(4) Pins 5 and 7 are not connected.
(5) A smoothing electrolytic capacitor is necessary for I/O external components. Please use a capacitor equivalent
to the recommended one.
(6) Please put an I/O smoothing capacitor near the module. Output ripple voltage may be larger or output voltage
may not be stable.
Electrical Characteristics Curves
BP5220A
1200
100
1000
Vi=8 to 15V
80
Vi=34V
Vi=25V
800
Vi=38V
Vi=30V
60
600
40
400
200
20
Vi=8V
Vi=23V
Vi=38V
0
25
50 70
100 120
AMBIENT TEMPERATURE : Ta( °C)
Fig.10 Derating curve
0
200 400 600 800 1000
OUTPUT CURRENT : IO (A)
Fig.11 Efficiency
20
Pw=0.2ms
10
5
3
2
Pw=1ms
1
0.5
0.3 Tc=25°C
0.2 SINGLE PULSE
0.1
1 2 3 5 10 20 30 50
VOLTAGE BETWEEN PIN2 AND PIN9 (V)
Fig.12 Safety operation range
BP5221A
0.6
0.5
0.4
0.3
0.2
0.1
100
Vi=8 to 15V
Vi=30 to 38V
Vi=8V
80
Vi=23V
60
Vi=38V
40
20
0
25
50 70
100 120
AMBIENT TEMPERATURE : Ta( °C)
Fig.13 Derating curve
0
0.1
0.2
0.3
0.4
0.5
OUTPUT CURRENT : IO (A)
Fig.14 Efficiency
10
Pw=1ms
4.5A
2.2A
1
Pw=10ms
Tc=25°C
SINGLE PULSE
0.1
1
10
100
VOLTAGE BETWEEN PIN2 AND PIN9 (V)
Fig.15 Safety operation range
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2010.03 - Rev. B
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