Bellnix BUD Series Manual Download Page 9

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Wide input / output, Buck-boost, ±Output DC/DC Converter

1 Watt BUD Series

Bellnix

DC-DC Converter

BDD20200930_Z02(BDD20190924_Z02)

7. How to use

7-1. Standard connection diagram and recommended layout

Standard connection diagram

Recommended layout

Note 1: Radj is the output voltage setting resistor. Be sure to connect a resistor with a value according to

the output voltage setting (Section 7-2), and do not leave it OPEN.

Note 2: Connect the input and output capacitors Cin, Cout

, Cout

as close as possible to the converter pin.

Note 3: The recommended layout diagram shows only the mounting surface. Design the pattern in

consideration of the input and output conditions and the ambient temperature to be used.

Note 4: If the output load is less than 0.05W on one side, the regulation rate may increase depending on the

conditions.

Summary of Contents for BUD Series

Page 1: ...in Fig 1 Note 5 The output voltage settings for positive and negative outputs are equal Voutp Voutn Note 6 Maximum output power of 1 8W 0 9W each can be output depending on input output conditions Fo...

Page 2: ...x wet bulb temperature 69 C no condensation In storage Same as above Note Refer to section 10 2 for details of storage before mounting 4 Specifications standards This product is RoHS compliance 4 1 Re...

Page 3: ...gulation 0 5 1 0 Vout Vin 3V to 18V 3V Voutp n 18V fixed value Poutp n 100 fixed value Static load regulation 3 8 0 5 1 0 Vout 3V Vin 18V fixed value 3V Voutp n 18V fixed value Poutp n 0 05W to 100 St...

Page 4: ...th measurement circuit of 4 3 2 Unless otherwise specified the following measurement conditions will apply Rated input rated output balance load Ioutp Ioutn Vin Voutp n 30V ambient temperature 25 C 5...

Page 5: ...um output power output current Vin V Voutp n V Poutp n max W Pout total W Ioutp n max A Vin V Voutp n V Poutp n max W Pout total W Ioutp n max A 3 3 0 50 1 00 0 167 3 12 0 60 1 20 0 050 5 3 0 53 1 07...

Page 6: ...and a board thickness of 1 6 mm Please use it for reference as the heat radiation characteristics will change depending on the wiring The temperature characteristics of this converter are greatly aff...

Page 7: ...and pin description 6 1 Shape and dimensions SMD type Model name 1 pin 11 0 0 3 Company name 10 0 0 5 Lot No Top View Side View 6 00 max Bottom View 1 3 4 7 7 1 0 0 1 5 08 7 45 1 05 8 9 2 3 45 6 9 3...

Page 8: ...input turns the output off Please refer to section 7 3 for the control method 4 ADJ Output voltage setting pin Connect an output voltage setting resistor between the ADJ pin and VOUT pin Refer to sec...

Page 9: ...nect a resistor with a value according to the output voltage setting Section 7 2 and do not leave it OPEN Note 2 Connect the input and output capacitors Cin Coutp Coutn as close as possible to the con...

Page 10: ...e converter Typical example Voutp n Settings V Radj k 3 3 24 7 22 2 7 5 73 8 27 47 12 433 330 47 56 15 774 680 47 47 7 3 ON OFF control By setting the voltage between the ON OFF pins Von off to High o...

Page 11: ...n the detected temperature of this product is 160 C typ or more the thermal shutdown operates and the switching operation stops 7 6 Over power protection It limits the output power when the converter...

Page 12: ...ode Reverse polarity protection circuit 9 Over voltage protection Example This product does not have a built in over voltage protection function If the output voltage setting resistor Radj becomes OPE...

Page 13: ...from giving vibrations during reflow for it may cause converter components to move Note2 After mounting the converter onto the board reflow cannot be made again by turning over the mounted boards 10 2...

Page 14: ...ature Ensure use within the standards Avoid storing or using the product in a place that generates corrosive gas or dust The product may be damaged by static electricity Make sure that the workplace i...