Jul. 12. 2012 / Preliminary

5/13

* This specifications are subject to be changed without notice

http://www.ad-tech.co.kr

ADT6780

Thermally enhanced Low V

Typical Operating Characteristics

VIN=12V, Load : 1A / one 4W White LED and Ta=25℃, unless otherwise noted

10V/div

20mV/div

0.5A/div

1㎲/div

Steady State Operation

LED Current (A)

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Efficiency

VIN=24V

VIN=12V

VIN=6V

0.184

0.188

0.192

0.196

0.200

0.204

0.208

0.212

0.216

-40

-20

0

20

40

60

80

100

120

750

800

850

900

950

1000

1050

-40

-20

0

20

40

60

80

100

120

2V/div

10V/div

2A/div

4㎲/div

Temperature (℃)

Temperature (℃)

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0

2040

6080

100

Duty (%)

Peak Current vs Duty

Switching Frequency vs Die Temperature

VFB vs Die Temperature

Output Short