Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

AAT3194 Datasheet(PDF) 1 Page - Advanced Analogic Technologies

Part No. AAT3194
Description  High Efficiency 1.5X Fractional Charge Pump For White LED Applications
Download  14 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  ANALOGICTECH [Advanced Analogic Technologies]
Homepage  http://www.analogictech.com
Logo 

AAT3194 Datasheet(HTML) 1 Page - Advanced Analogic Technologies

 
Zoom Inzoom in Zoom Outzoom out
 1 / 14 page
background image
AAT3194
High Efficiency 1.5X Fractional Charge
Pump For White LED Applications
Typical Application
CIN
1µF
VBATTERY
COUT
1µF
EN/SET
C1
1µF
C2
1µF
D4
D3
D2
D1
IN
OUT
C1+
C1-
C2+
C2-
D1
D2
D3
D4
EN/SET
GND
AAT3194
3194.2006.09.1.0
1
ChargePump
General Description
The AAT3194 is a low noise, constant frequency
charge pump DC/DC converters that use fractional
(1.5X) conversion to increase efficiency in white
LED applications. The devices can be used to pro-
duce current levels up to 20mA for each output
from a 2.7V to 5.5V input. A low external parts
count (two 1µF flying capacitors and two small
bypass capacitors at IN and OUT) makes these
devices ideally suited for small, battery-powered
applications.
AnalogicTech’s Simple Serial Control™ (S2Cwire™)
interface is used to enable, disable, and set the
LED drive current for 32-level logarithmic scale LED
brightness control. The AAT3194 has a thermal
management system for protection in the event of a
short-circuit condition on any of the output pins.
Built-in soft-start circuitry prevents excessive inrush
current during start-up. A high switching frequency
enables the use of small external capacitors. A low-
current shutdown feature disconnects the load from
VIN and reduces quiescent current to less than 1µA.
The AAT3194 is available in a Pb-free 12-pin
TSOPJW package.
Features
•VIN Range: 2.7V to 5.5V
20mA Full-Scale Current
Simple Serial Control (S2Cwire) Interface
— 32-Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
33% Less Input Current Than Doubler
Charge Pump
High Accuracy Brightness Matching
Small Application Circuit
Regulated Output Current
Automatic Soft Start
No Inductors
600kHz Switching Frequency
•IQ <1µA in Shutdown
Temperature Range: -40°C to 85°C
12-Pin TSOPJW Package
Applications
Programmable Current Source
White LED Backlighting


Html Pages

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


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