W-52 Datasheet, PDF (4/11 Pages) Copal Electronics – CMOS White LED Driver

W-52
TYPICAL CHARACTERISTICS
(V_IN = 3.6 V, T_AMB = 25$C, C_IN = 4.7 F, C_OUT = 1 F, L = 6.8 H, unless otherwise specified.)
600
600
VIN = 7 V
500
500
VIN = 2 V
400
400
300
300
200
2
3
4
5
6
7
INPUT VOLTAGE (V)
Figure 2. Quiescent Current vs. Input Voltage
2.0
1.6
1.2
0.8
0.4
0
2
3
4
5
6
7
INPUT VOLTAGE (V)
Figure 4. Switching Frequency vs. Input
Voltage
35
R_SET = 750
30
25
R_SET = 1.13 k
20
R_SET = 1.50 k
15
R_SET = 2.26 k
10
5
0
2
3
4
5
6
7
INPUT VOLTAGE (V)
Figure 6. LED Current vs. Input Voltage
200
ï50 ï25
0
25 50 75 100 125
TEMPERATURE ($C)
Figure 3. Quiescent Current vs. Temperature
2.0
1.6
1.2
0.8
0.4
0
ï50 ï25
0
25 50 75 100 125
TEMPERATURE ($C)
Figure 5. Switching Frequency vs.
Temperature
20
15
10
5
0
ï50 ï25
0
25
50
75 100 125
TEMPERATURE ($C)
Figure 7. LED Current vs. Temperature
4