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ADT6780_CN Arkusz danych(PDF) 4 Page - ADTech

Numer części ADT6780_CN
Szczegółowy opis  Thermally enhanced Low VFB Step-Down LED Driver
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ADT6780_CN Arkusz danych(HTML) 4 Page - ADTech

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Aug. 23. 2012 / Rev0.0
4/13
* 此规格如有更改不另行通知
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ADT6780
Thermally enhanced Low V
FB Step-Down LED Driver
电气特性 (Ta=25℃, VIN=12V, 除非特别注明)
参数
符号
条件
最小值
典型值
最大值
单位
关断电流
IOFF
VEN = 0V
-
10
-
㎂
静态电流
IQ
VEN = 3V, VFB = 1.4V
-
0.7
-
㎃
反馈电压
VFB
4.5V ≤ VIN ≤ 28V,
VCOMP < 2V
0.184
0.200
0.216
V
误差放大器的电压增益
AEA
-
-
750
-
V/V
误差放大器的跨导
GEA
Δ
ICOMP = ±10㎂
-
750
-
㎂
/V
高边开关的导通电阻
(注4)
RON.H
-
-
80
-
mΩ
低边开关的导通电阻
(注4)
RON.L
-
-
10
-
Ω
高边开关的泄漏
VEN = 0V , VSW = 0V
-
0.1
10
㎂
过流限制
(注4)
Duty=50%
-
3
-
A
Current sense to COMP 跨导
GCS
--
11
-
A/V
开关频率
FSW
-
-
925
-
㎑
Fold-back 频率
VFB = 0V
-
125
-
㎑
最大占空比
DMAX
VFB = 0.15V, IO=1A
76
86
99
%
最小启用时间
TON
-
-
100
-
㎱
UVLO 上升阈值电压
VEN rising
2.00
2.35
2.70
V
UVLO 阈值迟滞电压
-
-
250
-
㎷
EN 阈值电压
-
0.8
1.1
1.4
V
EN内部上拉电流
VEN = 0V
-
2.0
-
㎂
软启动时间
C4 = 100㎋
-3
-
㎳
过温保护
(注4)
-
-
145
-
℃
(注4) guaranteed by design.(由设计保证)


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