SP6686 datasheet(4/13 Pages) SIPEX

4 / 13 page

Date: 03/10/06

SP6686 400mA, Buck/Boost Charge Pump LED Driver

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 1. Output Current vs. Supply Voltage (C

IN =

2.2µF, C

FC = 0.47µF, COUT = 1.0µF

Figure 3. Efficiency vs. Supply Voltage (CIN = 2.2µF,

CFC = 0.47µF, COUT = 1.0µF)

VIN = 3.6, Typical Application, TA = 25°C unless otherwise noted.

D1 = AOT 2015HPW-1915B LED.

Figure 2. Output Current vs. Supply Voltage (C

IN =

2.2µF, C

FC = 0.47µF, COUT = 1.0µF

Figure 4. Efficiency vs. Supply Voltage (CIN = 2.2µF,

CFC = 0.47µF, COUT = 1.0µF)

Flash Mode 400mA Iout

100

200

300

400

500

600

3.0

3.2

3.4

3.6

3.8

4.0

4.2

IN (V)

Vf = 4.1V

Vf = 3.8V

Vf = 3.5V

Vf = 3.2V

Torch Mode 150mA Iout

100

150

200

250

3.0

3.2

3.4

3.6

3.8

4.0

4.2

Vin (V)

Vf = 3.5V

Vf = 3.3V

Vf = 3.1V

Vf = 3.0V

Torch Mode 150mA Efficiency

100

3.0

3.2

3.4

3.6

3.8

4.0

4.2

Vin (V)

Vf = 3.5V

Vf = 3.3V

Vf = 3.1V

Vf = 3.0V

Flash Mode 400mA Efficiency

100

3.0

3.2

3.4

3.6

3.8

4.0

4.2

Vin (V)

Vf = 4.1V

Vf = 3.8V

Vf = 3.5V

Vf = 3.2V

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