SBS005 datasheet(21/23 Pages) CYPRESS

21 / 23 page

Document Number: 002-08322 Rev. *A

Page 21 of 23

MB39A112EVB-01

Ripple current : Peak value

The peak ripple current must be within the rated current of the inductor.

If the peak ripple current is IL, it is obtained by the following formula.

Ripple current:Peak-to-peak value

If the peak-to-peak ripple current is

IL, it is obtained by the following formula.

9.3.3 Flyback diode (SBS005 : SANYO product)

VR (DC reverse voltage)

 30 V, average output current  1.0 A, peak surge current  10 A

VF (forward voltage)

 0.35 V, at I

 0.5 A

VR : The value enough to satisfy the input voltage

 30 V

On time of the diode is assumed to be tD (Max) , the diode mean current IDi is obtained by the following formula.

On time of the diode is assumed to be tD (Max) , the diode peak current IDip is obtained by the following formula.

10. Ordering Information

 I

 VIN  Vo3 t

 0.3 

 5



 0.417

 10  106

2300

 103

 0.36 A

IL

 VIN  Vo3 t



 5



 0.417

 106

2300

 103

 0.127 A

IDi

 Io  (1  Vo3 )  0.3  (1  0.417)  0.175 A

VIN

IDip

 (Io  Vo2 t

OFF

)

 0.36 A

EV board part No.

EV board version No.

Remarks

MB39A112EVB-01

MB39A112EV Board Rev 1.0

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