BP5220A/BP5221A BP5222A DC/DC converter ●External dimensions (Units : mm) 28.0 Max. 12.0 Max. Marked side 19.5 Max. Pin No. 1 2 3 4 5 6 7 2.54 9 0.5 1.4 4±1 4.0 Max. 2.54×8＝20.32 ●Applications Power supplies for copiers, personal computers, facsimiles, AV equipment, measuring instruments, vending machines, security device, registers, industrial equipment, and maintenance tools SIP9 ●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 Input voltage BP5220A BP5221A BP5222A Unit 8∼38 8∼38 15∼38 V Output voltage 5 5 12 V Output current 1 0.5 0.5 A 84 （VIN ＝15V） 90 （VIN ＝20V） ％ Power conversion 85 （VIN ＝15V） effciency ●Absolute maximum ratings （Ta=25℃） Parameter Input voltage Output current Symbol Limits BP5220A BP5221A BP5222A VIN 8∼38 8∼38 15∼38 IO 1 0.5 0.5 Unit V A Operating temperature range Topr −20∼＋70 ℃ Storage temperature range Tstg −25∼＋80 ℃ 74 Marked side ●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. 8.0 Max. ●Block diagram BP5220A / BP5221A / BP5222A DRIVE CIRCUIT POWER SUPPLY CIRCUIT CONTROL CIRCUIT N. C. 9 N. C. 7 VIN 6 5 4 3 2 1 ADJ N. C. CTL GND VOUT FB ●Electrical characteristics BP5220A (Unless otherwise noted: VIN=15V, IO=0.5A, SW=1, Ta=25℃) Symbol Min. Typ. Max. Unit Input voltage Parameter VIN 8 − 38 V Conditions Output voltage VO 4.75 5 5.25 V Output current IO − − 1 A Line regulation ΔVO1 − 27 80 mV VIN＝8V∼38V Load regulation ΔVO2 − 13 80 mV IO＝0.1A∼1A VIN＜30V ＊1 Output ripple voltage υr − 22 70 mVPP Power conversion efficiency η 75 85 − ％ Switching frequency fSW − 190 − kHz CTL pin ON resistance RON − − 4.7 kΩ VO＞4.75V CTL pin OFF resistance ROFF 200 − − kΩ VO＜0.1V, SW＝2 select ＊2 IO＝1A ＊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℃) Symbol Min. Typ. Max. Unit Input voltage Parameter VIN 8 − 38 V Output voltage VO 4.75 5 5.25 V Output current IO − − 0.5 A Line regulation ΔVO1 − 13 50 mV VIN＝8V∼38V Load regulation ΔVO2 − 3 50 mV IO ＝0.05A∼0.5A υr − 25 70 mVPP Power conversion efficiency η 70 84 − ％ Switching frequency fSW − 190 − kHz Output ripple voltage Conditions ＊1 ＊2 IO＝0.5A CTL pin ON resistance RON − − 4.7 kΩ VO＞4.75V CTL pin OFF resistance ROFF 200 − − kΩ 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℃) Symbol Min. Typ. Max. Unit Input voltage Parameter VIN 15 − 38 V Conditions Output voltage VO 11.2 12 12.8 V Output current IO − − 0.5 A Line regulation ∆VO1 − 22 50 mV VIN＝15V∼38V Load regulation ∆VO2 − 18 50 mV IO＝0.05A∼0.5A ＊1 Output ripple voltage υr − 29 70 mVPP Power conversion efficiency η 75 90 − ％ Switching frequency fSW − 190 − kHz ＊2 IO＝0.5A ＊2 CTL pin ON resistance RON − − 4.7 kΩ VO＞11.2V CTL pin OFF resistance ROFF 200 − − kΩ 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 A 5 4 3 2 1 A Outrput 0.47µF 2 200k 1 4.7k V ＋ 470µF / 50V SW 100µF / 50V Input ＋ 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 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) 7 6 5 4 3 2 1 Be sure to use fuse for safety. 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 Be sure to use fuse application example3) for safety. VO 470µF Fig.2 BP5220A / BP5221A / BP5222A 9 VIN 7 6 5 4 3 2 Output OFF 1 VO SW ＋ ＋ 100µF 470µF Fig.3 ●Application example Application example 1 : DC / DC converter with a protection circuit BP5220A / BP5221A / BP5222A VIN 24V 7 6 5 4 3 2 6 1 VO 5V ＋ 100µF 2.2MΩ※ 820Ω 1kΩ 0.22Ω 5 OUTPUT VOLTAGE（V） 9 ＋ 470µF 120pF ＋ 0.1µF COMP. 4 2 − 1 33kΩ BA10393 VIN ＝24V 3 0 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 100kΩ 2SC1740 100kΩ ON / OFF 470µF Fig.6 77 Application example 3 : Output voltage fine adjustment (2) When increasing the output voltage (1) When reducing the output voltage BP5220A / BP5221A / BP5222A 9 7 6 5 4 3 2 BP5220A / BP5221A / BP5222A 1 9 VIN ＋ 100µF 6 5 4 3 2 1 VO ＋ Be sure to use fuse for safety. 7 VIN VO ＋ 470µF 100µF VR Be sure to use fuse for safety. VR ＋ 470µF Fig.8 Fig.7 VR value setting equations(The output voltage after adjustment is denoted Vo.) (1) When reducing the output voltage BP5220A / BP5221A R =(VO−1.281) / (0.0278−0.00556VO) (kΩ) 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) 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 VIN 24V 7 6 5 4 3 2 1 VO ＋ ＋ Be sure to use 100µF fuse for safety. 470µF 100kΩ 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 100 1200 20 VIN＝8∼15V VIN＝34V VIN＝25V 800 VIN＝30V VIN＝38V 600 400 200 0 25 50 70 100 120 OUTPUT CURRENT INTO PIN9（A） 1000 EFFICIENCY：η（％） OUTPUT CURRENT ： Io（mA） VIN ＝8V VIN ＝23V 80 VIN ＝38V 60 40 20 0 AMBIENT TEMPERATURE： Ta（℃） 200 400 600 800 5 3 2 Pw＝1ms 1 0.5 0.3 Tc＝25℃ SINGLE PULSE 0.2 0.1 1 1000 2 3 5 10 20 30 50 VOLTAGE BETWEEN PIN2 AND PIN9（V） OUTPUT CURRENT： Io（A） Fig.10 Derating curve Pw＝0.2ms 10 Fig.12 Safety operation range Fig.11 Efficiency BP5221A OUTPUT CURRENT INTO PIN9（A） VIN ＝8V 0.5 VIN＝8∼20V VIN＝30∼38V 0.4 0.3 0.2 0.1 0 10 100 EFFICIENCY： η（％） OUTPUT CURRENT： Io（A） 0.6 25 50 70 100 120 80 VIN ＝23V 60 VIN ＝38V 40 20 0 0.1 0.2 0.3 0.4 AMBIENT TEMPERATURE： Ta（℃） OUTPUT CURRENT： Io（A） Fig.13 Derating curve Fig.14 Efficiency 0.5 Pｗ＝1ms 4.5A 2.2A Pｗ＝10ms 1 Tc＝25℃ SINGLE PULSE 0.1 1 10 Fig.15 Safety operation range Tc＝25℃ SINGLE PULSE 79 100 VOLTAGE BETWEEN PIN2 AND PIN9（V） BP5222A 0.6 100 10 VIN＝15∼20V VIN＝30V 0.4 80 VIN＝38V 0.3 0.2 25 50 70 100 VIN＝38V VIN ＝30V 60 40 20 0.1 0 120 0 0.1 0.2 0.3 0.4 OUTPUT CURRENT： Io（A） AMBIENT TEMPERATURE： Ta（℃） Fig.16 Derating curve Fig.17 Efficiency 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) 12.0 Max. 19.5 Max. Pin No. 1 2 3 4 5 6 7 2.54 9 0.5 1.4 2.54×8＝20.32 Marked side Marked side 4±1 4.0 Max. 8.0 Max. SIP9 80 0.5 4.5A 2.2A Pｗ＝1ms Pｗ＝10ms 1 Tc＝25℃ SINGLE PULSE 0.1 1 10 100 VOLTAGE BETWEEN PIN2 AND PIN9（V） Fig.18 Safety operation range pin9 sink current 28.0 Max. OUTPUT CURRENT INTO PIN9（A） 0.5 EFFICIENCY： η（％） OUTPUT CURRENT： Io（A） VIN＝23V 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