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DC/DC convert er
BP5220A/BP5221A BP5222A
Au Description 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. 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. Au Applications Power supplies for copiers, personal computers, facsimiles, AV equipment, measuring instruments, vending machines, security device, registers, industrial equipment, and maintenance tools Au Features 1) Wide range of input voltage. 2) High power conversion ef f iciency. 3) Built- in output ON / OFF switch. 4) Applicable to various purposes by A@ine- adjusting the output voltage. f 5) Small number of external components required. 6) Heat sink unnecessary. 7) Compact package. BP5220A / BP5221A / BP5222A : SIP9 Au List of the series
BP5220A Input voltage Output voltage Output current 8A38 5 1 BP5221A 8A38 5 0.5 84 Ai VINAA 15VAj BP5222A 15A38 12 0.5 90 Ai VINAA 20VAj
Au External dimensions (Units : mm)
28.0 Max. 12.0 Max.
Marked side 19.5 Max. Marked side
Pin No. 1 2 3 4 5 6 7 2.54 2.54A~ 20.32 8AA
9 0.5 1.4
4A}1
4.0 Max.
8.0 Max.
SIP9
Unit V V A Ai
Power conversion 85 Ai VINAA 15VAj effciency
Au Absolute maximum ratings Ai Ta=25Ae Aj
Parameter Input voltage Output current Operating temperature range Storage temperature range Symbol VIN IO Topr Tstg Limits BP5220A 8A38 1 BP5221A 8A38 0.5 A|20AA{70 A|25AA{80 BP5222A 15A38 0.5 Unit V A Ae Ae
74
Au Block diagram
BP5220A / BP5221A / BP5222A
DRIVE CIRCUIT
POWER SUPPLY CIRCUIT
CONTROL CIRCUIT
N. C. 9 VIN 7 6 ADJ
N. C. 5 N. C. 4 CTL 3 GND 2 VOUT 1 FB
BP5220A (Unless otherwise noted: VIN=15V, IO=0.5A, SW=1, Ta=25Ae)
Parameter Input voltage Output voltage Output current Line regulation Load regulation Output ripple voltage Power conversion efficiency Switching frequency CTL pin ON resistance CTL pin OFF resistance Symbol VIN VO IO E VO1 E VO2 E"r E fSW RON ROFF Min. 8 4.75 A| A| A| A| 75 A| A| 200 Typ. A| 5 A| 27 13 22 85 190 A| A| Max. 38 5.25 1 80 80 70 A| A| 4.7 A| Unit V V A mV mV mVPP Ai kHz k k VOAN 4.75V VOAE 0.1V, SWAA select 2 IOAA 1A VINAE 30V VINAA 8VA38V IOAA 0.1AA1A
An 2 An 1
Conditions
An Derating required according to the input voltage and ambient temperature. 1 An Pulse noise not included. 2
BP5221A (Unless otherwise noted: VIN=15V, IO=0.25A, SW=1, Ta=25Ae)
Parameter Input voltage Output voltage Output current Line regulation Load regulation Output ripple voltage Power conversion efficiency Switching frequency CTL pin ON resistance CTL pin OFF resistance Symbol VIN VO IO E VO1 E VO2 E" r E fSW RON ROFF Min. 8 4.75 A| A| A| A| 70 A| A| 200 Typ. A| 5 A| 13 3 25 84 190 A| A| Max. 38 5.25 0.5 50 50 70 A| A| 4.7 A| Unit V V A mV mV mVPP Ai kHz k k VOAN 4.75V VOAE 0.1V, SWAA select 2 IOAA 0.5A VINAA 8VA38V IO AA 0.05AA0.5A
An 2 An 1
Conditions
An Derating required according to the input voltage and ambient temperature. 1 An Pulse noise not included. 2
75
BP5222A (Unless otherwise noted ; VIN=20V, IO=0.25A, SW=1, Ta=25Ae)
Parameter Input voltage Output voltage Output current Line regulation Load regulation Output ripple voltage Power conversion efficiency Switching frequency CTL pin ON resistance CTL pin OFF resistance Symbol VIN VO IO VO1 VO2 E"r E fSW RON ROFF Min. 15 11.2 A| A| A| A| 75 A| A| 200 Typ. A| 12 A| 22 18 29 90 190 A| A| Max. 38 12.8 0.5 50 50 70 A| A| 4.7 A| Unit V V A mV mV mVPP Ai kHz k k VOAN 11.2V VOAE 0.1V, SWAA select 2 IOAA 0.5A
An 2 An 1
Conditions
VINAA 15VA38V IOAA 0.05AA0.5A
An 2
An Derating required according to the input voltage and ambient temperature. 1 An Pulse noise not included. 2
Au Measurement circuit
BP5220A / BP5221A / BP5222A 9 Input 7 6 5 4 3 2 1
A
100F / 50V
A{
SW 470F / 50V 1 2 0.47F
A
Outrput
V
A{
V
f
200k
4.7k
fAG Frequency counter 100F/50V, 470F/50V ; PL series A^ 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
Au Circuit operation (1) The basic application examples are shown in Fig.2. A@The externally installed parts are only the input and output smoothing capacitors. (2) Switching on and off the output voltage is allowed. A@The output can be switched off by making pin 4 to be open (high impedance). (See Fig.3)
BP5220A / BP5221A / BP5222A VIN
9 7 6 5 4 3 2 1
VO
A{
Be sure to use f use f or saf et y. 100F
A{
470F
(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 Be sure to use f use application example3) f or saf et y.
VIN
Fig.2
BP5220A / BP5221A / BP5222A
9 7 6 5 4 3 2 1
Output OFF VO
SW
A{ A{
100F
470F
Fig.3
Au Application example Application example 1 : DC / DC converter with a protection circuit
BP5220A / BP5221A / BP5222A VIN 24V
A{
6
9
7
6
5
4
3
2
1
OUTPUT VOLTAGEAi VAj
0.22 820 1kE
A{
VO 5V
5 4 3 2 1 VIN AA 24V
100F 2.2M
470F
120pF 0.1F COMP.
| {
BA10393
33k
0
0.2
0.4
0.6
0.8
1.0
1.2
OUTPUT CURRENTAi AAj
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. A This is a standard application. Because the control current f luctuates with variations in circuits and components, set the control current by adding a suf f icient margin to the normal current level.
Application example 2 : Output ON / OFF control
Be sure to use f use f or saf ety. VIN
A{
BP5220A / BP5221A / BP5222A
9 7 6 5 4 3 2 1
VO 100F ON / OFF
A{
470F
100k 2SC1740 100k
Fig.6
77
Application example 3 : Output voltage f ine adjustment A@ When reducing the output voltage (1)
BP5220A / BP5221A / BP5222A 9 VIN
A{
(2) When increasing the output voltage
BP5220A / BP5221A / BP5222A
7
6
5
4
3
2
1 VO VIN
A{
9
7
6
5
4
3
2
1 VO
100F
Be sure to use f use f or saf ety.
A{
470F VR
100F
Be sure to use f use f or saf ety.
VR
A{
470F
Fig.7
Fig.8
VR value setting equations(The output voltage after adjustment is denoted Vo.) A@ When reducing the output voltage (1) BP5220A / BP5221A R =(VOA|1.281) / (0.0278A|0.00556VO) (k) BP5222A RAA VoA|1.281Aj /Ai 0.1196A|0.01Vo) (k) Ai A@ When increasing the output voltage (2) BP5220A / BP5221A RAA 11160 / (48.4VoA|242) (k) BP5222A RAA 1200 / (9.368VoA|112) (k) 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 usef ul f or preventing the malf unction of an external prot ection circuit due to a rush current, and can serve as a countermeasure against the operation outside the saf e operation range.
BP5220A / BP5221A / BP5222A 9 VIN 24V
A{
7
6
5
4
3
2
1 VO
A{
Be sure t o use 100F f use f or saf ety. 470k 100k
A{
470F
2SC1740R C1 10F
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
Au 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. Au Electrical characteristic curves BP5220A
1200 OUTPUT CURRENT AFIoAi mAAj 1000 VINAA 34V 800 VINAA 38V 600 400 200
100
OUTPUT CURRENT INTO PIN9Ai AAj VIN AA 8V VINAA 8A15V EFFICIENCYAF EAi AiAj VINAA 25V VINAA 30V 80 VIN AA 23V VIN AA 38V 60
20 10 5 3 2 1 0.5 25Ae 0.3 TcAA SINGLE PULSE 0.2 0.1 1 2 3 5 10 20 30 50 PwAA 1ms PwAA 0.2ms
40
20
0
25
50
70
100
120
0
200
400
600
800
1000
AMBIENT TEMPERATUREAFTaAi Ae Aj
OUTPUT CURRENTAFIoAi AAj
VOLTAGE BETWEEN PIN2 AND PIN9Ai VAj
Fig.10 Derating curve
Fig.11 Efficiency
Fig.12 Safety operation range
BP5221A
OUTPUT CURRENT INTO PIN9Ai AAj 0.6 OUTPUT CURRENTAFIoAi AAj 0.5 0.4 0.3 0.2 0.1 100 VIN AA 8V EFFICIENCYAFEAi AiAj VINAA 8A20V VINAA 30A38V 80 VIN AA 23V VIN AA 38V 10 4.5A 2.2A 1 PCo 1ms AA
PCo 10ms AA
60
40
20
TcAA 25Ae SINGLE PULSE
0
25
50
70
100
120
0
0.1
0.2
0.3
0.4
0.5
0.1 1
10
100
AMBIENT TEMPERATUREAFTaAi Ae Aj
OUTPUT CURRENTAFIoAi AAj
VOLTAGE BETWEEN PIN2 AND PIN9Ai VAj
Fig.13 Derating curve
Fig.14 Efficiency
Fig.15 Safety operation range
TcAA 25Ae SINGLE PULSE
79
BP5222A
0.6 OUTPUT CURRENTAFIoAi AAj 0.5 0.4 0.3 0.2 0.1 100 OUTPUT CURRENT INTO PIN9Ai AAj VINAA 23V
VINAA 15A20V VINAA 30V VINAA 38V
10 4.5A 2.2A PCo 1ms AA
EFFICIENCYAFEAi AiAj
80
VINAA 38V VIN AA 30V
60
PCo 10ms AA
1
40
20
TcAA 25Ae SINGLE PULSE
0
25
50
70
100
120
0
AMBIENT TEMPERATUREAFTaAi Ae Aj
0.1 0.2 0.3 0.4 OUTPUT CURRENTAFIoAi AAj
0.5
0.1 1 10 100 VOLTAGE BETWEEN PIN2 AND PIN9Ai VAj
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
A{
A{
Voltage developed between pins 2 and 9
Fig.19 ASO measurement circuit
Au External dimensions (Units : mm)
28.0 Max. 12.0 Max.
Marked side 19.5 Max. Marked side
Pin No. 1 2 3 4 5 6 7 2.54 2.54A~ 20.32 8AA
9 0.5 1.4
4A}1
4.0 Max.
8.0 Max.
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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