SEMICONDUCTOR
TECHNICAL DATA
KAB3405T
BICD LINEAR INTEGRATED CIRCUIT
Revision No : 2
Step Up Type DC/DC Converter for White LED
KAB3405T is a high efficient Step-Up Type DC/DC Converter specially
designed for constant current drive of White LED. This IC can drive 2-10
white LEDs connected series using a Li-ion Battery. This IC contains N-ch
MOS-FET Transistor for Coil-Switching, and LED Current (I
F
) is set with an
external resistor.
Features
Variable LED Current I
F
is set with a external resistor
: 20 mA (Typ.) @ R
SENS
= 15
High Efficiency
Output Over Voltage Shutdown
Built in output over voltage protect circuit.
Switching Frequency : 1.0 MHz (Typ.)
Applications
Back light white LEDs in LCD of PDA, Cellular Phone
Handy Terminal Equipment.
2008. 3. 10 1/6
Basic Application Circuit
