參數(shù)資料
型號(hào)： AAT1239-1
廠商： Advanced Analogic Technologies, Inc.
英文描述： 40V Step-Up Converter for 4 to 10 White LEDs
中文描述： 40V的升壓轉(zhuǎn)換器為4至10個(gè)白光LED
文件頁(yè)數(shù)： 13/21頁(yè)
文件大?。?/td> 915K
代理商： AAT1239-1
AAT1239-1
40V Step-Up Converter for 4 to 10 White LEDs
SwitchReg
TM
PRODUCT DATASHEET
1239-1.2007.10.1.0
13
w w w . a n a l o g i c t e c h . c o m
LED Brightness Control
The AAT1239-1 uses S
2
Cwire programming to control
LED brightness and does not require PWM (pulse width
modulation) or additional control circuitry. This feature
greatly reduces the burden on a microcontroller or sys-
tem IC to manage LED or display brightness, allowing
the user to “set it and forget it.” With its high-speed
serial interface (1MHz data rate), the output current of
the AAT1239-1 can be changed successively to brighten
or dim the LEDs in smooth transitions (i.e., to fade out)
or in abrupt steps, giving the user complete program-
mability and real-time control of LED brightness.
0
5
10
15
20
25
1
4
7
10
13
16
S
2
Cwire Data Register
L
SEL=HIGH
SEL=LOW
Default
Figure 5: Programming AAT1239-1 LED Current
with R
BALLAST
= 30.1
Ω
.
C1
2.2μF
2.2μH
L1
374K
R2
12K
R3
R1
30.1
V
CC
1
2
3
Enable
JP2
JP1
10K
R4
2.2μF
C2
1
2
3
Select
DS1
under 20V application: C2 25V 0805 X7R 2.2μF GRM21BR71E225KA73L
C1 10V 0603 X5R 2.2μF GRM188R60J225KE01D
C2 50V 1206 X7R 2.2μF GRM31CR71H225KA88
DS1 SS16L
D1-D10 LW M673 White LED
SW
5
6
VIN
EN
SEL
N/C
1
2
3
4
PGND
SW
8
7
9
FB
10
LIN
11
12
AAT1239-1 TSOP12JW
U1
LED
D1
LED
D2
LED
D3
LED
D4
LED
D5
LED
D9
L1 2.2μH SD3814-2R2 or SD3110-2R2
LED
D6
LED
D7
LED
D8
LED
D10
other alternatives:
more stability at 40V: C2 50V 1206 X7R 4.7μF GRM31CR71H475K
Figure 4: AAT1239-1 White LED Boost Converter Schematic.
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AAT1239-1_08 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:40V Step-Up Converter for 4 to 10 White LEDs
AAT1239-1_0810 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:40V Step-Up Converter for 4 to 10 White LEDs
AAT1239ITP-1 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:40V Step-Up Converter for 4 to 10 White LEDs
aat1239itp-1-db1 制造商:Skyworks Solutions Inc 功能描述:AAT1239 Series 40 V Step-Up Converter for 4 to 10 White LEDs Eval Board
AAT1239ITP-1-T1 制造商:Skyworks Solutions Inc 功能描述:STEP UP CONVERTER 40V FOR WLED 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER
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