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參數(shù)資料
| 型號(hào)： | AAT1231 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | Step-Up DC/DC Converters for White LED Backlight Applications |
| 中文描述： | 升壓型DC / DC轉(zhuǎn)換器，用于白光LED背光應(yīng)用 |
| 文件頁數(shù)： | 14/27頁 |
| 文件大?。?/td> | 1535K |
| 代理商： | AAT1231 |
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AAT1231/1231-1
Step-Up DC/DC Converters for
White LED Backlight Applications
14
1231.2007.01.1.2
LED Brightness Control
The AAT1231 and the AAT1231-1 use S
2
Cwire pro-
gramming to control LED brightness and does not
require PWM (pulse width modulation) or addition-
al control circuitry. This feature greatly reduces the
burden on a microcontroller or system IC to man-
age LED or display brightness, allowing the user to
"set it and forget it." With its high-speed serial inter-
face (1MHz data rate), the output current of the
AAT1231 and the AAT1231-1 can be changed suc-
cessively to brighten or dim the LEDs in smooth
transitions (i.e., to fade out) or in abrupt steps, giv-
ing the user complete programmability and real-
time control of LED brightness.
Figure 5: Programming AAT1231 LED Current
with R
BALLAST
= 30.1
Ω
.
0
5
10
15
20
25
1
4
7
10
13
16
L
S
2
Cwire Data Register
SEL = HIGH
SEL = LOW
(Default)
Figure 4: AAT1231/1231-1 White LED Boost Converter Schematic.
V
IN
= 2.7V to 5.5V
C1
2.2μF
C2
2.2μF
2.2μH
L1
226K
R2
12K
R3
R1
30.1
Ω
V
OUT
= 24V/20mA
1
2
3
Enable
JP2
JP1
R4 10K
1
2
3
Select
DS1
N/C
SW
5
VIN
EN
SEL
VP
1
6
PGND
SW
8
2
3
7
4
GND
9
FB
10
OVP
11
LIN
12
TSOP12JW
U1 AAT1231/1231-1 TSOPJW-12
L1 2.2μH SD3814-2R2
C1 2.2μF 10V 0603
C2 2.2μF 25V 0805
D1-D6 LW M673 White LED
DS1 30V 0.2A BAT42W SOD-123
R1 30.1 0603
R2 226K 0603
R3 12K 0603
R4 10K 0603
U1 AAT1231/1231-1
D4
LED
D3
LED
D2
LED
D1
LED
LED
D5
LED
D6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT1231ITP-1-T1 | Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP-T1 | Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1232 | 24V 100mA Step-Up Converter |
| AAT1232IRN-T1 | 24V 100mA Step-Up Converter |
| AAT1232ITP-T1 | 24V 100mA Step-Up Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1231_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP-1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP-1-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
| AAT1231ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
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