ETC CDT2500

CDT2500
350mA Power LED Current Regulator
產品說明(General Description)
產品特性(Features)
CDT2500 是一顆低噪音的 LED 驅
動 IC,設計應用於推動定電流
350mA power LED,具有低壓降、
低工作電流與快速的暫態響應的
良好特性,並且因為所需的外部
零件不多,使其非常適合用在以
電池驅動可推的電路中
輸入電壓:2.7V~6V
保證 350mA 輸出電流
低壓降耗損
低工作電流
快速的暫態響應
輸入電壓範圍 2.7V--6V
LED 開路/短路保護
過溫保護
SOP-8 與 TO-252 包裝
產品應用(Applications)
LED 手電筒
Power LED 驅動器
腳位圖(Pin Assignment)
TO-252
SOT-89
(Top View)
(Top View)
2
GND
PIN ON
1
2
3
1
1
2
OUT
GND
PIN NAME
OUT
GND
VDD
3
VDD
1
OUT
FUNCTION
輸出腳位
電位參考點
電源正端
3
VDD
z 功能方塊圖(Block Diagram)
Thermal
Shutdown
OUT
Bandgap
Vref
VDD
GND
z Absolute Maximum Ratings
y Supply Voltage ------------------
-0.3V
y Input Voltage --------------------y Operating Temperature --------y Storage Temperature-------------
0.3V to VDD+0.3V
-40℃
to 85℃
-50℃
to 150℃
to
7.0V
* Note:Stresses above those listed may cause permanent damage to the devices.
z Electrical Characteristic
( VDD=3.7V, TA = 25℃, no load, unless otherwise specified)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
6.0
V
390
mA
VDD
Input Voltage
IOUT
Output Current
VOUT=0.2V
UVLOAD
Load Regulation
VOUT=0.2V~3V
3
mA/V
UVLINE
Line Regulation
VDD=3V~6V
VOUT=0.2V
3
mA/V
VDROP
Output Dropout Voltage (Note1)
120
mV
IVDD
Operating Current
200
uA
2.7
Note1:Output dropout voltage:90% * IOUT @ VOUT = 200mV
315
350
z 功能說明(Function Description)
y 定電流功能
350mA 的定電流是由 IC 內部的電阻設定完成,不需要外加的電阻。 IC 內部的低壓降
電流源也維持 LED 精確的電流。
z 應用線路圖(Application Circuit)
VDD
3
CDT2500
2.7V~6.0V
2
GND
1
OUT
z 封裝外觀圖(Package Information)
y SOT-89-3PIN outline dimensions
D
D1
POLISHED(2X)
E
H
L
B1
1
2
C
3
B
10 (2X)
A
e
e1
Symbols
MIN.
MAX.
A
B
B1
C
D
D1
E
H
e
e1
L
1.40
0.44
0.36
0.35
4.40
1.35
2.29
3.94
1.60
0.56
0.48
0.44
4.60
1.83
2.60
4.25
1.50 BSC
3.00 BSC
0.89
1.2
UNIT:MM
NOTES.
1.
2.
JEDEC OUTLINE:TO-243 AA
DIMENSION B1, 2 PLACES.
y TO-252-3PIN outline dimensions
A
E
A1
b2
c1
E1
4
D1
SEATING PLANE
L2
H
SEE NOTE 2
2
1
L1
3
e
b
c
L
e1
Symbols
A
A1
b
b2
c
c1
D
E
D1
E1
e
e1
H
L
L1
L2
MIN.
MAX.
0.086
0.094
0.040
0.050
0.024 TYP.
0.205
0.215
0.018
0.023
0.018
0.023
0.210
0.220
0.250
0.265
-
0.180
-
0.150
0.090 BSC.
0.180 BSC.
0.370
0.410
-
0.020
0.250
0.040
0.060
0.080
NOTES.
1.
2.
JEDEC OUTLINE:TO-252 AB
2 MILS SUGGESTED FOR POSITIVE CONTACT AT MOUNTING.
VARIATIONS (ALL DIMENSIONS SHOWN IN INCH)
* CDT assumes no responsibility for the use of the specification described. CDT reserves the right to modify the product specification without notice.
( 以上規格僅供參考,本公司得逕行修正,不另通知 )