Thermally enhanced Low V
FB
Step-Down LED Driver
ADT6780
Electrical Characteristics (Ta=25℃, V
IN
=12V, unless otherwise noted)
Parameters
Supply current (shutdown)
Supply current (quiescent)
Feedback voltage
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-Side Switch On Resistance (Note4)
Low-Side Switch On Resistance (Note4)
High-Side Switch Leakage Current
Peak Current Limit
Current sense to COMP transconductance
Oscillator frequency
Fold-back frequency
Maximum Duty cycle
Minimum On time
UVLO rising threshold
UVLO threshold hysteresis
EN threshold voltage
Enable pull-up current
Soft-Start Period
Thermal shutdown (Note4)
D
MAX
T
ON
G
CS
F
SW
Symbol
I
OFF
I
Q
V
FB
A
EA
G
EA
R
ON.H
R
ON.L
Condition
V
EN
= 0V
V
EN
= 3V, V
FB
= 1.4V
4.5V
≤
V
IN
≤
28V,
V
COMP
< 2V
-
ΔI
COMP
=
±10㎂
-
-
V
EN
= 0V , V
SW
= 0V
Duty=50%
-
-
V
FB
= 0V
V
FB
= 0.15V, IO=1A
-
V
EN
rising
-
-
V
EN
= 0V
C4 = 100㎋
-
Min.
-
-
0.184
-
-
-
-
-
-
-
-
-
76
-
2.00
-
0.8
-
-
-
Typ.
10
0.7
0.200
750
750
80
10
0.1
3
11
925
125
86
100
2.35
250
1.1
2.0
3
145
Max.
-
-
0.216
-
-
-
-
10
-
-
-
-
99
-
2.70
-
1.4
-
-
-
Unit
㎂
㎃
V
V/V
㎂/V
mΩ
Ω
㎂
A
A/V
㎑
㎑
%
㎱
V
㎷
V
㎂
㎳
℃
Note4. guaranteed by design.
* This specifications are subject to be changed without notice
Jul. 12. 2012 / Preliminary
4/13
http://www.ad-tech.co.kr
ADTECH [ ADTECH ]
