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| NR120E Datasheet, PDF (8/13 Pages) Sanken electric – 3A, 18V, Buck Regulator | |||
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3A, 18V, Buck Regulator
NR120E series
Allowable package power dissipation
Nov./10/2015
NOTES
1) Glass-epoxy board mounting in a 30Ã30mm
2) copper area : 25Ã25mm
3) The power dissipation is calculated at the junction temperature 125 °C
4) Losses can be calculated by the following equation.
As the efficiency is subject to the input voltage and output current, it shall be obtained from the efficiency curve and
substituted in percent
5) Thermal design for D1 shall be made separately.
PD
ï½
VO
ï
IO
ï§ï§ï¨ï¦
100
ï¨x
ï1ï·ï·ï¸ï¶ ï
VF
ï IOï§ï§ï¨ï¦1ï
VO
VIN
ï·ï·ï¸ï¶
VO: Output voltage
VIN: Input voltage
IO: Output current
ηx: Efficiency(%)
VF: Diode forward voltage
SJPB-L4â¦0.55V(IO=3A)
Rev.1.1
SANKEN ELECTRIC CO., LTD.
8
http://www.sanken-ele.co.jp
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