SP6686
400mA Buck/Boost Charge Pump LED Driver
Fig. 16: Battery Current vs Supply Voltage
D1=AOT2015HPW-1915 LED, RSENSE=0.3Ω
RSET=106kΩ, CIN=2.2µF, CFC=0.47µF,COUT=1µF
Fig. 17: Battery Current vs Supply Voltage
D1=AOT3228HPW0303B LED, RSENSE=0.3Ω
RSET=140kΩ, CIN=2.2µF, CFC=0.47µF,COUT=1µF
Fig. 18: Startup Torch
VIN=3.6V, VOUT=3.1V, CIN=4.7µF, CFC=0.47µF,COUT=2.2µF
Fig. 19: Startup Flash
VIN=3.6V, VOUT=3.5V, CIN=4.7µF, CFC=0.47µF,COUT=2.2µF
Fig. 20: Torch in 1x to Flash in 1x Mode
VIN=4.2V, CIN=4.7µF, CFC=0.47µF,COUT=2.2µF
Fig. 21: Torch in 1x to Flash in 2x Mode
VIN=3.6V, CIN=4.7µF, CFC=0.47µF,COUT=2.2µF
© 2009 Exar Corporation
7/12
Rev. 2.0.0