SP6685_06 Datasheet, PDF (8/16 Pages) Sipex Corporation – 700mA Buck/Boost Charge Pump LED Driver

TYPICAL PERFORMANCE CHARACTERISTICS
DI = AOT 6060HPW0305BD LED, Rsense = 0.33ohms,
R_SET = 75K, C_IN = 4.7μF, C_FC = 1.0μF, C_OUT = 1.0μF
D1 = AOT 2015HPW-1915B LED, Rsense = 0.22ohms,
R_SET = 80.6K, C_IN = 4.7μF, C_FC = 1.0μF, C_OUT = 1.0μF
Output Current Vs Supply Vol
700
600
500
400
Flash 500mA Vf = 4
300
Torch 150mA Vf = 3
200
100
0
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Vin (V
Figure 19.
Output Current Vs Supply Vol
700
600
500
400
Flash 600mA
Vf=3.8V
Torch 200mA
300
Vf=3.2V
200
100
0
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Vin (V
Figure 22.
Efficiency Vs Supply Vol
100
90
Flash 500mA
80
Vf = 4.1V
Torch 150mA
Vf = 3.5V
70
60
50
40
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Vin (V
Figure 20.
Efficiency Vs Supply Vol
100
90
80
70
Flash 600mA Vf=3.8
Torch 200mA Vf = 3
60
50
40
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Vin (V
Figure 23.
1400
Battery Current Vs Supply Vo
1400
Battery Current Vs Supply V
1200
1200
1000
1000
800
Flash 500mA Vf = 4
600
Torch 150mA Vf = 3
400
800
Flash 600mA Vf=3.
600
Torch 200mA Vf=3.
400
200
0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
Vin (V
Figure 21.
Note: diode, resistor, and capacitor settings apply to
figures 19, 20, and 21.
200
0
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Vin (V
Figure 24.
Note: diode, resistor, and capacitor settings apply to
figures 22, 23, and 24.
Date: 7/6/06 Rev B
SP6685, 700mA Buck/BoostCharge Pump LED Driver
8
© 2006 Sipex Corporation