ADT6780 ADTECH [ADTech], ADT6780 Datasheet - Page 5

• Manufacturer Part Number: ADT6780
• Description: Thermally enhanced Low VFB Step-Down LED Driver
• Manufacturer: ADTECH [ADTech]

Jul. 12. 2012 / Preliminary
I
Typical Operating Characteristics
VIN=12V, Load : 1A / one 4W White LED and Ta=25℃, unless otherwise noted
INDUCTOR
10V/div
2V/div
2A/div
V
V
100%
0.216
0.212
0.208
0.204
0.200
0.196
0.192
0.188
0.184
OUT
95%
90%
85%
80%
75%
70%
65%
60%
SW
0.1
-40
0.2
-20
VFB vs Die Temperature
0.3
0
Output Short
0.4
Temperature (℃)
LED Current (A)
Efficiency
20
Thermally enhanced Low V
* This specifications are subject to be changed without notice
4㎲/div
0.5
40
0.6
60
0.7
80
VIN=12V
VIN=24V
0.8
VIN=6V
100
0.9
120
1
5/13
V
20mV/div
I
0.5A/div
OUT
INDUCTOR
10V/div
FB
(AC)
Step-Down LED Driver
V
1050
1000
Switching Frequency vs Die Temperature
SW
950
900
850
800
750
4.0
3.5
3.0
2.5
2.0
1.5
1.0
-40
0
-20
Steady State Operation
Peak Current vs Duty
20
0
Temperature (℃)
20
40
Duty (%)
1㎲/div
40
http://www.ad-tech.co.kr
60
60
80
80
ADT6780
100
120
100