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SP6685ER

700mA Buck/Boost Charge Pump LED Driver

Signal Processing Technologies 

TYPICAL PERFORMANCE CHARACTERISTICS

VIN = 3.6V, Typical Application Circuit, D1 = Luxeon LXCL-PWF1, TA = 25°C unless otherwise noted.

Ch1 = EN

Ch2 = VOUT

Ch4 = lin

(0.5A/div)

Figure 25. Startup 200mA Torch,

VIN = 3.6V, VOUT = 3.2V

Ch1 = EN

Ch2 = VOUT

Ch4 = lin

(0.5A/div)

Figure 26. Startup 700mA Flash,

VIN = 3.6V, VOUT = 3.6V

Figure 27. Torch in 1X to Flash in 1X Mode VIN = 4.2V.

CH1 = FLASH, CH2 = VOUT, CH3 = VFB, CH4 = IOUT 1A/div.

Figure 28. Torch in 1X to Flash in 2X Mode VIN = 3.6V.

CH1 = FLASH, CH2 = VOUT, CH3 = VFB, CH4 = IOUT 1A/div.

Date: 7/6/06 Rev B

SP6685, 700mA Buck/BoostCharge Pump LED Driver

9

© 2006 Sipex Corporation

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