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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 |
| 文件頁數(shù)： | 1/21頁 |
| 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
1
w w w . a n a l o g i c t e c h . c o m
General Description
The AAT1239-1 is a high frequency, high efficiency con-
stant current boost converter capable of driving up to
ten (10) series-connected white LEDs or 40V. It is an
ideal power solutions for backlight applications with up
to ten white LEDs in series. The input voltage is 2.7V to
5.5V for single-cell lithium-ion/polymer (Li-ion) based
portable devices.
The LED current is digitally controlled across a 6x oper-
ating range using AnalogicTech’s Simple Serial Control
(S
2
Cwire) interface. Programmability across 26 dis-
crete current steps provides high resolution, low noise,
flicker-free, constant LED outputs. In programming
AAT1239 operation, LED brightness increases based on
the data applied at the EN/SET pin. The SEL logic pin
changes the feedback voltage between two program-
mable ranges.
The AAT1239-1 features a high current limit and fast,
stable transitions for stepped or pulsed current applica-
tions. The high switching frequency (up to 2MHz) pro-
vides fast response and allows the use of ultra-small
external components, including chip inductors and
capacitors. Fully integrated control circuitry simplifies
design and reduces total solution size. The AAT1239-1
offers a true load disconnect feature which isolates the
load from the power source while in the OFF or disabled
state. This eliminates leakage current, making the devic-
es ideally suited for battery-powered applications.
The AAT1239-1 is available in the Pb-free, thermally-
enhanced 12-pin TSOPJW package.
Features
Input Voltage Range: 2.7V to 5.5V
Maximum Continuous Output 40V @ 30mA
Drives up to 10 LEDs in Series
Constant LED Current with 3.5% Accuracy Over
Temperature and Input Voltage Range
Digital Control with S
2
Cwire Single Wire Interface
26 Discrete Steps
No PWM Control Required
No Additional Circuitry
Up to 82% Efficiency
Up to 2MHz Switching Frequency Allows Small External
Chip Inductor and Capacitors
Hysteretic Control
No External Compensation Components
Excellent Load Transient Response
High Efficiency at Light Loads
Integrated Soft Start with No External Capacitor
True Load Disconnect Guarantees <1.0
μ
A Shutdown
Current
Selectable Feedback Voltage Ranges for High Resolution
Control of Load Current
Short-Circuit, Over-Voltage, and Over-Temperature
Protection
12-Pin TSOPJW Package
-40°C to +85°C Temperature Range
Applications
Color Display Backlight
Digital Still Cameras (DSCs)
Digital Photo Frames
PDAs and Notebook PCs
White LED Drivers
Typical Application
LIN
EN/SET
PGND
PVIN
2L1
2C1
2C2
Li-Ion:
V
IN
= 2.7V to 4.2V
AAT1239-1
SS16LDS1
R1 (R
BALLAST
)
30
.1
LED
2I
SW
FB
SEL
VIN
AGND
R3
12k
R2
374k
OVP
Enable/Set
Feedback Voltage
Select
Oor equivalent
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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: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: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: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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