KAB3405T_08 Datasheet, PDF (6/6 Pages) KEC(Korea Electronics) – Step Up Type DC/DC Converter for White LED

KAB3405T
3) Input Logic signal
I_F can be adjusted with Logic signal input as indicated in recommended circuit.
The resistor connected the ON-state Nch MOS Drain and R_SENS determines I_F.
Average of setting current Io (mA) is next, approximately.
I_F=(300 [mV]/Sum of resistor value [ ])
300[mV]
I_F [mA] = _{Sum of resistor v alue [ ]}
<<Recommended application>>
M1
M2
LED Current
OFF
OFF
300[mV]
R_SENS[ ]
ON
OFF
300[mV]
R_SENS[ ] R1[ ]
R_SENS[ ]+ R1[ ]
OFF
ON
300[mV]
R_SENS[ ] R2[ ]
R_SENS[ ]+ R2[ ]
ON
ON
300[mV]
R_SENS[ ] R1[ ] R2[ ]
R_SENS[ ] R1[ ] + R_SENS[ ] R2[ ] + R1[ ] R2[ ]
2008. 3. 10
Revision No : 2
6/6