BP5222A [ROHM]
DC/DC converter; DC / DC转换器
| 型号： | BP5222A |
| 厂家： | 
ROHM |
| 描述： | DC/DC converter |
| 文件： | 总8页 (文件大小：868K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DC/DC converter
BP5220A/BP5221A
BP5222A
●Description
●External dimensions (Units : mm)
The BP5220A, BP5221A, BP5222A, are DC / DC
converters that use a pulse width modulation (PWM)
system. They contain control circuits, switching devices,
rectifiers, and coils, and operate by only connecting an
I / O smoothing capacitor. With a high efficiency of power
conversion, the modules are available in stand-alone
9-pin SIP packages with no heat sink required.
28.0 Max.
12.0
Max.
Marked side
19.5 Max.
They can be applied to various purposes by fine-adjusting
the output voltage and switching on and off. With a wide
range of input voltage, the modules are best suited for
obtaining a stable local power supply from a main
power supply with a large voltage variation.
Pin No. 1
2
3
4
5
6
7
9
4±1
0.5
1.4
2.54
4.0
Max.
8.0
Max.
2.54×8＝20.32
●Applications
SIP9
Power supplies for copiers, personal computers,
facsimiles, AV equipment, measuring instruments,
vending machines, security device, registers,
industrial equipment, and maintenance tools
●Features
1) Wide range of input voltage.
2) High power conversion efficiency.
3) Built-in output ON / OFF switch.
4) Applicable to various purposes by
ꢀ fine-adjusting the output voltage.
5) Small number of external components required.
6) Heat sink unnecessary.
7) Compact package.
BP5220A / BP5221A / BP5222A : SIP9
●List of the series
BP5220A
BP5221A
BP5222A
15～38
12
Unit
Input voltage
Output voltage
Output current
8～38
8～38
5
V
V
A
5
1
0.5
0.5
Power conversion
effciency
85
84
90
％
（VIN＝15V） （VIN＝15V） （VIN＝20V）
●Absolute maximum ratings （Ta=25℃）
Limits
BP5221A
8～38
Parameter
Symbol
Unit
BP5220A
8～38
1
BP5222A
15～38
0.5
Input voltage
VIN
IO
V
A
Output current
0.5
Operating temperature range
Storage temperature range
Topr
Tstg
－20～＋70
－25～＋80
℃
℃
74
●Block diagram
BP5220A / BP5221A / BP5222A
DRIVE CIRCUIT
POWER
SUPPLY
CIRCUIT
CONTROL CIRCUIT
N. C.
7
N. C.
9
6
5
4
3
2
1
VIN
ADJ
N. C.
CTL
GND
VOUT
FB
●Electrical characteristics BP5220A (Unless otherwise noted: VIN=15V, IO=0.5A, SW=1, Ta=25℃)
Parameter
Input voltage
Symbol
VIN
Min.
8
Typ.
－
Max.
38
Unit
V
Conditions
VO
4.75
－
5
5.25
1
V
Output voltage
＊1
＊2
IO
－
A
VIN＜30V
Output current
VIN＝8V～38V
IO＝0.1A～1A
ΔVO1
－
27
13
22
85
190
－
80
mV
mV
mVPP
％
Line regulation
ΔVO2
υr
－
80
Load regulation
－
70
Output ripple voltage
Power conversion efficiency
Switching frequency
CTL pin ON resistance
CTL pin OFF resistance
η
fSW
75
－
－
IO＝1A
－
kHz
kΩ
kΩ
RON
ROFF
－
4.7
－
VO＞4.75V
200
－
VO＜0.1V, SW＝2 select
＊1 Derating required according to the input voltage and ambient temperature.
＊2 Pulse noise not included.
BP5221A (Unless otherwise noted: VIN=15V, IO=0.25A, SW=1, Ta=25℃)
Parameter
Input voltage
Symbol
VIN
Min.
8
Typ.
－
5
Max.
38
Unit
V
Conditions
VO
4.75
－
5.25
0.5
50
V
Output voltage
＊1
IO
－
13
3
A
Output current
ΔVO1
ΔVO2
υr
－
mV
mV
mVPP
％
VIN＝8V～38V
Line regulation
－
50
IO ＝0.05A～0.5A
Load regulation
＊2
－
25
84
190
－
－
70
Output ripple voltage
Power conversion efficiency
Switching frequency
CTL pin ON resistance
CTL pin OFF resistance
η
70
－
－
IO＝0.5A
fSW
－
kHz
kΩ
kΩ
RON
－
4.7
－
VO＞4.75V
ROFF
200
VO＜0.1V, SW＝2 select
＊1 Derating required according to the input voltage and ambient temperature.
＊2 Pulse noise not included.
75
BP5222A (Unless otherwise noted ; VIN=20V, IO=0.25A, SW=1, Ta=25℃)
Parameter
Input voltage
Symbol
VIN
Min.
15
Typ.
－
Max.
38
Unit
V
Conditions
VO
11.2
－
12
－
12.8
0.5
50
V
Output voltage
＊1
IO
A
Output current
∆VO1
∆VO2
－
22
18
29
90
190
－
mV
mV
mVPP
％
VIN＝15V～38V
Line regulation
－
50
IO＝0.05A～0.5A
Load regulation
＊2
＊2
υ
r
－
70
Output ripple voltage
Power conversion efficiency
Switching frequency
CTL pin ON resistance
CTL pin OFF resistance
η
fSW
75
－
IO＝0.5A
－
－
kHz
kΩ
kΩ
RON
－
4.7
－
VO＞11.2V
ROFF
200
－
VO＜0.1V, SW＝2 select
＊1 Derating required according to the input voltage and ambient temperature.
＊2 Pulse noise not included.
●Measurement circuit
BP5220A / BP5221A / BP5222A
9
7
6
5
4
3
2
1
Input
Outrput
A
A
SW
1
2
＋
＋
V
V
f
f；Frequency counter
100µF/50V, 470µF/50V ; PL series ／ NICHIKON(Low-impedance type)
Fig.1
T
Switching frequency=1/T
Output ripple voltage
Note) that output ripple voltage depends on the type and characteristics of the output capacitor.
76
●Circuit operation
(1) The basic application examples are shown in Fig.2.
ꢀ The externally installed parts are only the input and
output smoothing capacitors.
BP5220A / BP5221A / BP5222A
9
7
6
5
4
3
2
1
VIN
VO
(2) Switching on and off the output voltage is allowed.
ꢀ The output can be switched off by making pin 4 to
be open (high impedance). (See Fig.3)
Be sure to use fuse
＋
＋
for safety.
470µF
100µF
(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
Fig.2
BP5220A / BP5221A / BP5222A
Be sure to use fuse
for safety.
VIN
Output OFF
VO
application example3)
9
7
6
5
4
3
2
1
SW
＋
＋
470µF
100µF
Fig.3
●Application example
Application example 1 : DC / DC converter with a protection circuit
6
5
4
3
2
1
0
BP5220A / BP5221A / BP5222A
9
7
6
5
4
3
2
1
VO
5V
VIN
24V
0.22Ω
＋
＋
100µF
470µF
VIN ＝24V
2.2MΩ※
120pF
＋
COMP.
－
BA10393
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
BP5220A / BP5221A / BP5222A
Be sure to use fuse
for safety.
9
7
6
5
4
3
2
1
VIN
VO
＋
＋
100µF
470µF
ON / OFF
100kΩ
2SC1740
Fig.6
77
Application example 3 : Output voltage fine adjustment
ꢀ(1) When reducing the output voltage
(2) When increasing the output voltage
BP5220A / BP5221A / BP5222A
BP5220A / BP5221A / BP5222A
9
7
6
5
4
3
2
1
9
7
6
5
4
3
2
1
VIN
VIN
VO
VO
＋
＋
＋
＋
Be sure to use
fuse for safety.
Be sure to use
fuse for safety.
VR
470µF
470µF
100µF
100µF
VR
Fig.8
Fig.7
VR value setting equations(The output voltage after adjustment is denoted Vo.)
ꢀ(1) When reducing the output voltage
BP5220A / BP5221A
BP5222A R＝（Vo－1.281）/（0.1196－0.01Vo) (kΩ)
ꢀ(2) When increasing the output voltage
BP5220A / BP5221A R＝11160 / (48.4Vo－242) (kΩ)
BP5222A R＝1200 / (9.368Vo－112) (kΩ)
R =(VO－1.281) / (0.0278－0.00556VO) (kΩ)
To make full use of the ability of the the module products, we recommended the output voltage be
adjusted within ± 20% of the output voltage rating. When the output voltage is increased by 20%, for
instance, the minimum input voltage is also increased by 20%.
(Example : When the output voltage is changed from 5V to 6V in the BP5220A, the minimum input voltage
is changed from 8V to 9.6V)
Application example 4 : Slow start
The slow start circuit mitigates the pulse load on the internal switching transistor when input voltage is applied,
and rises the output voltage gradually by starting the switching operation slowly.
This application is useful for preventing the malfunction of an external protection circuit due to a rush current,
and can serve as a countermeasure against the operation outside the safe operation range.
BP5220A / BP5221A / BP5222A
9
7
6
5
4
3
2
1
VIN
24V
VO
＋
＋
Be sure to use
fuse for safety.
470µF
100µF
470kΩ
2SC1740R
＋
C1
10µF
Fig.9
C1 is a slow-start capacitor for mitigating the over rush current that flows into the modules when the switch is
turned on.
78
●Operation notes
(1) No circuit is installed in the modules to protect against over output currents. Take physical safety measures
such as fusing 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 Figs.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 of application 1 or the slow start circuit of application 4.
(4) Pins 5 and 7 are no connected.
(5) 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 this module. Output ripple voltage may be larger or output voltage
may not be stable.
●Electrical characteristic curves
BP5220A
1200
1000
800
20
10
5
100
80
VIN ＝8V
Pw＝0.2ms
VIN ＝23V
VIN＝8～15V
VIN＝25V
VIN＝34V
VIN＝38V
VIN ＝38V
3
2
VIN＝30V
60
600
Pw＝1ms
1
40
400
0.5
Tc＝25℃
SINGLE PULSE
0.3
0.2
20
200
0.1
0
25
50
70
100
120
1
2
3
5
10
20 30 50
0
200
400
600
800
1000
AMBIENT TEMPERATURE： Ta（℃）
VOLTAGE BETWEEN PIN2 AND PIN9（V）
OUTPUT CURRENT： Io（A）
Fig.10 Derating curve
Fig.12 Safety operation range
Fig.11 Efficiency
BP5221A
10
0.6
100
80
60
40
20
Pｗ＝1ms
VIN ＝8V
4.5A
2.2A
0.5
0.4
0.3
0.2
0.1
VIN ＝23V
VIN＝8～20V
VIN＝30～38V
Pｗ＝10ms
VIN ＝38V
1
Tc＝25℃
SINGLE PULSE
0.1
1
10
100
0
25
50
70
100
120
0
0.1
0.2
0.3
0.4
0.5
VOLTAGE BETWEEN PIN2 AND PIN9（V）
AMBIENT TEMPERATURE： Ta（℃）
OUTPUT CURRENT： Io（A）
Fig.15 Safety operation range
Fig.14 Efficiency
Fig.13 Derating curve
Tc＝25℃
SINGLE PULSE
79
BP5222A
0.6
100
80
10
VIN＝23V
Pｗ＝1ms
0.5
0.4
0.3
0.2
0.1
4.5A
2.2A
VIN＝15～20V
VIN＝30V
VIN＝38V
VIN ＝30V
Pｗ＝10ms
VIN＝38V
60
1
40
20
Tc＝25℃
SINGLE PULSE
0.1
0
25
50
70
100
120
1
10
100
0
0.1
0.2
0.3
0.4
0.5
AMBIENT TEMPERATURE： Ta（℃）
OUTPUT CURRENT： Io（A）
VOLTAGE BETWEEN PIN2 AND PIN9（V）
Fig.16 Derating curve
Fig.17 Efficiency
Fig.18 Safety operation range
pin9 sink current
BP5220A / BP5221A / BP5222A
9
7
6
5
4
3
2
1
＋
＋
Voltage developed
between pins 2 and 9
Fig.19 ASO measurement circuit
●External dimensions (Units : mm)
28.0 Max.
12.0
Max.
Marked side
19.5 Max.
Pin No. 1
2
3
4
5
6
7
9
4±1
0.5
1.4
2.54
4.0
Max.
8.0
Max.
2.54×8＝20.32
SIP9
80
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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