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BP5220A Datasheet(PDF) 4 Page - Rohm |
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BP5220A Datasheet(HTML) 4 Page - Rohm |
4 / 8 page 77 ●Circuit operation (1) The basic application examples are shown in Fig.2. The externally installed parts are only the input and output smoothing capacitors. (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) (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) ●Application example Application example 1 : DC / DC converter with a protection circuit Fig.3 470 µF 120pF 100 µF 0.22 Ω COMP. 2.2M Ω※ + − BA10393 VIN 24V VO 5V 9 7 6 5 4 3 2 1 BP5220A / BP5221A / BP5222A + + Fig.4 VIN =24V 0.2 0.4 0.6 0.8 1.0 1.2 6 5 4 3 2 1 0 OUTPUT CURRENT(A) Fig.5 Fig.6 ※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. 9 7 6 5 4 3 2 1 470 µF VIN VO BP5220A / BP5221A / BP5222A 100 µF + + Fig.2 Be sure to use fuse for safety. 9 7 6 5 4 3 2 1 470 µF VIN SW VO BP5220A / BP5221A / BP5222A Output OFF + 100 µF + Be sure to use fuse for safety. Application example 2 : Output ON / OFF control 9 7 6 5 4 3 2 1 VIN VO 470 µF 100k Ω 2SC1740 BP5220A / BP5221A / BP5222A ON / OFF 100 µF + + Be sure to use fuse for safety. |
Similar Part No. - BP5220A |
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Similar Description - BP5220A |
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