SI-8008TM View Datasheet(PDF) -

DC/DC Step-Down Converter IC

SI-8000TM Series

September 2005

4-2 Power Dissipation

SI-8000TM

Series Power

Tjmax=125℃

Dissipation

PD = VO

⋅

IO

⎜⎜⎝⎛

100

ηx

− 1⎟⎟⎠⎞

− VF

⋅

IO ⎜⎜⎝⎛1 −

VO

VIN

⎟⎟⎠⎞

copper area

Glass‐epoxy board mounting in 30×30 ㎜

copper area

copper area

VO: Output voltage

VIN: Input voltage

IO: Output current

ηx: Efficiency（％）

VF: Diode forward

voltage

SFPB66･･0.5V

(IO=1.5A)

copper area

copper area

copper area

Ambient Temperature Ta [℃]

Note1：As the efficiency varies subject to the input voltage and output current, it shall be obtained

from the efficiency curve in page 4 and substituted in percent.

Note2：Thermal design for Di shall be made separately.

Sanken Electric Co.,Ltd.

6/15

I02-001EA-050910

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