Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

AAT3142 Datasheet(PDF) 1 Page - Advanced Analog Technology, Inc.

Part No. AAT3142
Description  High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Download  16 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  AAT [Advanced Analog Technology, Inc.]
Homepage  http://www.aatech.com.tw
Logo 

AAT3142 Datasheet(HTML) 1 Page - Advanced Analog Technology, Inc.

 
Zoom Inzoom in Zoom Outzoom out
 1 / 16 page
background image
AAT3142
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
3142.2007.03.1.2
1
ChargePump
General Description
The AAT3142 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-
mode load switch (1X), fractional (1.5X), and dou-
bling (2X) conversion to maximize efficiency for
white LED applications. The device produces cur-
rent levels up to 30mA on each of its three current
source outputs to drive various arrangements of
LEDs from a 2.7V to 5.5V input. Outputs may be
operated individually or in parallel for driving high-
er-current LEDs. A low external parts count (two
1µF flying capacitors and two small 1µF capacitors
at V
IN and CP) make the AAT3142 ideally suited for
small battery-powered applications.
AnalogicTech's Simple Serial Control™ (S
2Cwire™)
digital input is used to enable, disable, and set the
LED drive current with a 32-level logarithmic scale
LED brightness control. The AAT3142 has a thermal
management system to protect the device in the
event of a short-circuit condition at an output pin.
Built-in soft-start circuitry prevents excessive inrush
current during start-up. A high charge pump switch-
ing frequency enables the use of very small external
capacitors. In shutdown mode, the device discon-
nects the load from V
IN and reduces quiescent cur-
rent to less than 1µA. The AAT3142 is available in
the very small, Pb-free 12-pin TSOPJW package.
Features
•V
IN Range: 2.7V to 5.5V
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and V
F Coverage
Drives Low-V
F and High-VF Type LEDs
Up to Three 30mA Outputs
32-Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
1MHz Switching Frequency
Small Application Circuit
Regulated Output Current
Automatic Soft Start
No Inductors
•I
Q < 1µA in Shutdown
12-Pin TSOPJW Package
Applications
Color (RGB) Lighting
Programmable Current Sources
White LED Backlighting
White Photo Flash for Digital Still Cameras
Typical Application
CIN
1
μF
VBATTERY
CCP
1
μF
EN/SET
C1
1
μF
C2
1
μF
D3
D2
D1
VIN
CP
C1+
C1-
C2+
C2-
D1
D2
D3
EN/SET
GND
AAT3142


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn