Diodes AP8801 Manuel d'utilisateur télécharger pdf (Page 5)

AP8801

500mA LED STEP-DOWN CONVERTER

AP8801

Document number: DS31765 Rev. 7 - 2

5 of 14

www.diodes.com

June 2012

Typical Characteristics (T

= +25°C, V

= 60V, L =68µH unless otherwise stated.)

OUTPUT CURRENT DEVIATION (%)

SUPPLY VOLTAGE (V)

Figure. 8 LED Current vs. Input Voltage

61218 4824 30 36 42

-10

-8

-6

-4

-2

SUPPLY VOLTAGE (V)

Figure. 9 Efficiency vs. Input Voltage

61218 4824 30 36 42

IEN

(%)

100

SWITCHING FREQUENCY (kHz)

700

100

200

500

600

300

400

SUPPLY VOLTAGE (V)

Figure. 10 Switching Frequency vs. Input Voltage

61218 4824 30 36 42

SUPPLY VOLTAGE (V)

Figure. 11 Duty Cycle vs. Input Voltage

61218 4824 30 36 42

LE (%)

100

Figure. 12 Steady State Waveforms

Figure.13 Start-Up Showing LED Current Soft -Start

1 2 3 4 5 6 7 8 9 10 ... 13 14

AP8801 1
Electrical Characteristics (T 3
Typical Characteristics 4
Typical Characteristics (T 5
Application Information 6
PWM Dimming of LED Current 9
Directly Driving CTRL Input 9
500mA LED STEP-DOWN CONVERTER 11
(1) SO-8 12
(2) MSOP-8 12
(1) SO-8 13

Commentaires sur ces manuels

Pas de commentaire

Diodes AP8801 Manuel d'utilisateur Page 5

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Diodes AP8801