ADT6780 ADTECH [ADTech], ADT6780 Datasheet - Page 6

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

Jul. 12. 2012 / Preliminary
Typical Operating Characteristics
VIN=12V, Load : 1A / one 4W White LED and Ta=25℃, unless otherwise noted
0.5A/div
0.5A/div
10V/div
10V/div
10V/div
5V/div
2V/div
5V/div
2V/div
5V/div
2V/div
1A/div
V
V
V
V
V
V
V
I
V
I
V
I
OUT
OUT
OUT
LED
LED
LED
SW
SW
SW
EN
EN
EN
(C4 open, PWM Frequency=500Hz, Duty=50%)
PWM Dimming Through Enable
Enable Start-up
Enable Start-up
(C4=100nF)
Thermally enhanced Low V
(C4 open)
40㎲/div
* This specifications are subject to be changed without notice
1㎳/div
1㎳/div
6/13
0.5A/div
0.5A/div
10V/div
10V/div
FB
5V/div
2V/div
5V/div
2V/div
V
V
Step-Down LED Driver
V
V
V
I
V
I
OUT
OUT
LED
LED
SW
SW
EN
EN
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
LED Current vs PWM Dimming Duty
0
(C4 open, PWM Frequency=500Hz)
20
PWM Dimming Duty (%)
Enable Turn-off
Enable Turn-off
(C4=100nF)
(C4 open)
40
40㎲/div
40㎲/div
http://www.ad-tech.co.kr
60
80
ADT6780
100