Diodes AP3019A Manuel d'utilisateur télécharger pdf (Page 8)

Data Sheet

WHITE LED STEP-UP CONVERTER AP3019A

May. 2010 Rev. 1.8 BCD Semiconductor Manufacturing Limited

Typical Performance Characteristics (Continued)

WLED forward voltage (V

) is 3.45V at I

=20mA, unless otherwise noted.

Figure 12. Feedback Voltage vs. Figure 13. Schottky Forward Drop vs.

Junction Temperature Junction Temperature

Figure 14. Schottky Leakage Current vs. Figure 15. Current Limit vs. Duty Cycle

Junction Temperature

-50 -25 0 25 50 75 100

190

192

194

196

198

200

202

204

206

208

210

Feedback Voltage (mV)

Junction Temperature (

-50 -25 0 25 50 75 100

0.60

0.62

0.64

0.66

0.68

0.70

0.72

0.74

0.76

0.78

0.80

Schottky Forward Drop (V)

Junction Temperature (

=150mA

-50 -25 0 25 50 75 100

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

Schottky Leakage Current (µA)

Junction Temperature (

=10V

=16V

=23V

30 40 50 60 70 80 90

100

200

300

400

500

600

700

-50

100

Current Limit (mA)

Duty Cycle (%)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Electrical Characteristics 5
Schottky Forward Current (mA) 6
Schottky Forward Drop (mV) 6
Feedback Voltage (mV) 8
Junction Temperature ( 8
9
Application Information 10
C: X5R or X7R dielectric 12
Pin 1 Dot by Marking 13
Pin 1 Dot by 14

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