BP5221 [ROHM]
DC / DC CONVERTER; DC / DC变换器
| 型号： | BP5221 |
| 厂家： | 
ROHM |
| 描述： | DC / DC CONVERTER |
| 文件： | 总8页 (文件大小：79K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DC / DC converter
BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
The BP5220, BP5221, BP5222, BP5220X, BP5221X, and BP5222X 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. 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.
Applications
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.
5) Small number of external components required.
6) Heat sink unnecessary.
7) Compact package.
2) High power conversion efficiency.
3) Built-in output ON / OFF switch.
4) Applicable to various purposes by
fine-adjusting the output voltage.
BP5220 / BP5221 / BP5222 : SIP9
BP5220X / BP5221X / BP5222X : SIP9(L-shaped lead type)
List of the series
BP5220 / BP5220X BP5221 / BP5221X BP5222 / BP5222X
Unit
V
Input voltage
Output voltage
Output current
8~38
8~38
5
15~38
12
5
1
V
0.5
0.5
A
Power conversion
effciency
85
(VIN=15V)
84
(VIN=15V)
90
(VIN=20V)
%
Absolute maximum ratings (Ta=25°C)
Limits
BP5221 / BP5221X
8~38
Parameter
Symbol
Unit
BP5220 / BP5220X
BP5222 / BP5222X
15~38
Input voltage
VIN
IO
8~38
1
V
A
Output current
0.5
0.5
Operating temperature range
Storage temperature range
Topr
Tstg
−20~+70
−25~+80
°C
°C
1/8
BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
Block diagram
BP5220 / BP5221 / BP5222
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 BP5220 / BP5220X (Unless otherwise noted: VIN=15V, IO=0.5A, SW=1, Ta=25°C)
Parameter
Input voltage
Symbol
VIN
Min.
8
Typ.
−
Max.
38
5.25
1
Unit
V
Conditions
VO
4.75
−
5
V
Output voltage
1
2
IO
−
A
VIN < 30V
Output current
VIN=8V~38V
IO=0.1A~1A
∆VO1
−
35
20
30
85
190
−
80
80
70
−
mV
mV
mVPP
%
Line regulation
∆VO2
ν r
−
Load regulation
−
Output ripple voltage
Power conversion efficiency
Switching frequency
CTL pin ON resistance
CTL pin OFF resistance
η
75
−
IO=1A
fSW
−
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.
BP5221 / BP5221X (Unless otherwise noted: VIN=15V, IO=0.25A, SW=1, Ta=25°C)
Parameter
Input voltage
Symbol
VIN
Min.
8
Typ.
−
Max.
38
5.25
0.5
80
80
70
−
Unit
V
Conditions
VO
4.75
−
5
V
Output voltage
1
2
IO
−
A
Output current
∆VO1
∆VO2
ν r
−
35
20
30
84
190
−
mV
mV
mVPP
%
VIN=8V~38V
Line regulation
−
IO =0.05A~0.5A
Load regulation
−
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
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.
2/8
BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
BP5222 / BP5222X (Unless otherwise noted ; VIN=20V, IO=0.25A, SW=1, Ta=25°C)
Parameter
Input voltage
Symbol
VIN
Min.
15
11.2
−
Typ.
−
Max.
38
12.8
0.5
80
80
70
−
Unit
V
Conditions
VO
12
−
V
Output voltage
1
IO
A
Output current
∆VO1
∆VO2
ν r
−
22
45
35
90
190
−
mV
mV
mVPP
%
VIN=15V~38V
IO=0.05A~0.5A
Line regulation
−
Load regulation
2
2
−
Output ripple voltage
Power conversion efficiency
Switching frequency
CTL pin ON resistance
CTL pin OFF resistance
η
75
−
IO=0.5A
fSW
−
kHz
kΩ
kΩ
RON
ROFF
−
4.7
−
VO > 11.2V
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
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
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.
3/8
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
output smoothing capacitors.
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
9
7
6
5
4
3
2
1
VO
Be sure to use
fuse for safety
VIN
(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)
+
+
100µF
470µF
(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
OUTPUT
OFF
9
7
6
5
4
3
2
1
VO
Be sure to use
fuse for safety
SW
VIN
+
+
100µF
470µF
Fig.3
Application example
Application example 1 : DC / DC converter with a protection circuit
BP5220 / BP5221 / BP5222
6
5
4
3
2
1
0
BP5220X / BP5221X / BP5222X
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
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
9
7
6
5
4
3
2
1
Be sure to use
fuse for safety
VO
+
VIN
+
470µF
100µF
ON / OFF
100kΩ
2SC1740
Fig.6
4/8
BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
Application example 3 : Output voltage fine adjustment
(1) When reducing the output voltage
(2) When increasing the output voltage
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
9
7
6
5
4
3
2
1
9
7
6
5
4
3
2
1
Be sure to use
fuse for safety
Be sure to use
fuse for safety
VO
470µF
VO
470µF
+
+
VIN
VIN
VR
+
+
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
BP5220 / BP5221, BP5220X / BP5221X
R=(VO−1.281) / (0.0278−0.00556VO) (kΩ)
BP5222, BP5222X
R=(Vo−1.281) / (0.1196−0.01Vo) (kΩ)
(2) When increasing the output voltage
BP5220 / BP5221, BP5220X / BP5221X
R=11160 / (48.4Vo−242) (kΩ)
BP5222, BP5222X
R=1200 / (9.368Vo−112) (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 BP5220, 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.
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
9
7
6
5
4
3
2
1
Be sure to use
fuse for safety
VO
+
VIN
24V
+
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.
5/8
BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
Operation notes
(1) 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.
(2) Pins 5 and 7 are no connected.
(3) 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.
(4) 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.
Electrical characteristic curves
BP5220, BP5220X
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°C
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(°C)
VOLTAGE BETWEEN PIN2 AND PIN9 (V)
OUTPUT CURRENT : Io (A)
Fig.10 Derating curve
Fig.12 Safety operation range
Fig.11 Efficiency
BP5221, BP5221X
0.6
100
80
60
40
20
VIN =8V
5
0.5
0.4
0.3
0.2
0.1
VIN =23V
Pw=1ms
VIN=8~20V
3
2
VIN=30~38V
VIN =38V
Pw=10ms
1
0.5
Tc=25°C
SINGLE PULSE
0.3
0.2
0.1
1
2
3
5
10
20 30 50
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 (°C)
OUTPUT CURRENT : Io (A)
Fig.15 Safety operation range
Fig.14 Efficiency
Fig.13 Derating curve
74
6/8
BP5220 / BP5221 / BP5222 /
BP5220X / BP5221X / BP5222X
BP5222, BP5222X
0.6
100
80
VIN=23V
5
0.5
0.4
0.3
0.2
0.1
VIN=15~20V
VIN=30V
Pw=1ms
VIN=38V
VIN =30V
3
2
VIN=38V
60
Pw=10ms
1
40
20
0.5
Tc=25°C
SINGLE PULSE
0.3
0.2
0.1
1
2
3
5
10
20 30 50
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 (°C)
OUTPUT CURRENT : Io (A)
Fig.18 Safety operation range
Fig.16 Derating curve
Fig.17 Efficiency
pin9 sink current
BP5220 / BP5221 / BP5222
BP5220X / BP5221X / BP5222X
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.
28.0 Max.
12.0
12.0
Max.
Max.
19.5 Max.
Pin No. 1
2
3
4
5
6
7
9
Pin No.
1
2
3
4
5
6
7
9
4±1
4.0
8.0
Max.
0.5
1.4
Max.
0.5±0.1
+0.2
2.54
p=2.54±0.2
1.1
4.0
Max.
8.0
Max.
−0.1
+1.0
2.54×8=20.32
7.0
−0.5
2.54×8=20.32
SIP9
SIP9 (L forming)
7/8
Precautions on Use of ROHM Power Module
Safety Precautions
1) The products are designed and produced for application in ordinary electronic equipment (AV equipment,
OA equipment, telecommunication equipment, home appliances, amusement equipment etc.).
If the products are to be used in devices requiring extremely high reliability (medical equipment, transport
equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life
and sufficient fail-safe measures, please consult with the Company's sales staff in advance. If product
malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures
must be taken, including the following:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits in the case of single-circuit failure
2) The products are designed for use in a standard environment and not in any special environments.
Application of the products in a special environment can deteriorate product performance. Accordingly,
verification and confirmation of product performance, prior to use, is recommended if used under the
following conditions:
[a] Use in various types of liquid, including water, oils, chemicals, and organic solvents
[b] Use outdoors where the products are exposed to direct sunlight, or in dusty places
[c] Use in places where the products are exposed to sea winds or corrosive gases, including
Cl2, H2S, NH3, SO2, and NO2
[d] Use in places where the products are exposed to static electricity or electromagnetic waves
[e] Use in proximity to heat-producing components, plastic cords, or othe flammable items
[f] Use involving sealing or coating the products with resin or other coating materials
[g] Use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after
soldering
[h] Use of the products in places subject to dew condensation
3) The products are not radiation resistant.
4) The Company is not responsible for any problems resulting from use of the products under conditions not
recommended herein.
5) The Company should be notified of any product safety issues. Moreover, product safety issues should be
periodically monitored by the customer.
Precautions Regarding Application Example and External Circuits
1) If change is made to the constant of an external circuit, allow a sufficient margin due to variations of the
characteristics of the products and external components, including transient characteristics, as well as
static characteristics. Please be informed that the Company has not conducted investigations on whether
or not particular changes in the application examples or external circuits would result in the infringement
of patent rights of a third party.
2) The application examples, their constants, and other types of information contained herein are applicable
only when the products are used in accordance with standard methods.
Therefore, if mass production is intended, sufficient consideration to external conditions must be made.
Prohibitions Regarding Industrial Property
1) These Specifications contain information related to the Company’s industrial property. Any use of them
other than pertaining to the usage of appropriate products is not permitted. Duplication of these
Specifications and its disclosure to a third party without the Company’s permission is prohibited.
2) Information and data on products, including application examples, contained in these specifications are
simply for reference; the Company does not guarantee any industrial property rights, intellectual property
rights, or any other rights of a third party regarding this information or data. Accordingly, the Company
does not bear any responsibility for:
[a] infringement of the intellectual property rights of a third party
[b] any problems incurred by the use of the products listed herein.
3) The Company prohibits the purchaser of its products to exercise or use the intellectual property rights,
industrial property rights, or any other rights that either belong to or are controlled by the Company, other
than the right to use, sell, or dispose of the products.
8/8
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