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SM8120AH Datasheet(PDF) 10 Page - Nippon Precision Circuits Inc

No. de pieza SM8120AH
Descripción Electrónicos  White LED Driver IC
Download  14 Pages
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Fabricante Electrónico  NPC [Nippon Precision Circuits Inc]
Página de inicio  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8120AH Datasheet(HTML) 10 Page - Nippon Precision Circuits Inc

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SM8120A
NIPPON PRECISION CIRCUITS INC.—10
Current Switching using External Transistors
If only a few brightness steps are required, the LED current can be adjusted by switching the LED current set-
ting resistance using external transistors (Tr).
R1
250
SBD
Select signal 1
Tr1
R2
100
COUT
1.0
µF
L
22
µH
CIN
4.7
µF
VIN
3.6V
LED
Select signal 2
Tr2
R3
40
VSS
FB
SW
VDD
CE
Select signal 2
Select signal 1
ILED
Low
Low
2mA
Low
High
2 + 5 = 7mA
High
Low
2 + 12.5 = 14.5mA
High
High
2 + 5 + 12.5 = 19.5mA


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