 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AAT3152 Datasheet(PDF) 1 Page - Advanced Analog Technology, Inc. |
|
|
|||||||||||||||||||||||||||||
AAT3152 Datasheet(HTML) 1 Page - Advanced Analog Technology, Inc. |
|
|
1 / 12 page  AAT3152 High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications 3152.2005.08.1.2 1 ChargePump™ General Description The AAT3152 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The AAT3152 is capable of driving four-channel LEDs from a 2.7V to 5.5V input. The current sinks may be operated individually or in par- allel for driving higher-current LEDs. A low external parts count (two 1µF flying capacitors and two small 1µF capacitors at V IN and VOUT) makes this part ide- ally suited for small, battery-powered applications. AnalogicTech's S 2Cwire™ (Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED with eight settings (20mA down to 50µA) including main/sub-display group control. The AAT3152 consumes extremely low cur- rent internally (50µA typical) at light load for opti- mized efficiency. Each output of the AAT3152 is equipped with built- in protection for V OUT short-circuit and auto-disable for load short-circuit conditions. Built-in soft-start circuitry prevents excessive inrush current during start-up. A low current shutdown feature discon- nects the load from V IN and reduces quiescent cur- rent to less than 1µA. The AAT3152 is available in a Pb-free, space-sav- ing, thermally-enhanced 12-pin 3x3mm TDFN package. Features •V IN Range: 2.7V to 5.5V • Fully Programmable Current with Single Wire — Eight-Step Current: 20mA to 50µA — Individual Main-Sub Group Control — Low I Q (50µA) at Light Load • Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and V F Coverage • Drives 1-4 Channels of LEDs • No Inductors, Low Noise Operation • 1MHz Constant Switching Frequency • Small Application Circuit • Built-In Thermal Protection • Built-In Auto-Disable for Short-Circuit • Automatic Soft Start •I Q <1µA in Shutdown • Thermally-Enhanced 3x3mm 12-Pin TDFN Package Applications • Color (RGB) Lighting • Programmable Current Sinks • White LED Backlighting • White Photo Flash for Digital Still Cameras Typical Application C1 1 µF C2 1 µF D1 D2 D3 D4 COUT 1 µF CIN 1 µF 2.7V to 5.5V EN/SET VIN EN/SET C1+ C1- C2+ C2- VOUT D1 D2 D3 D4 GND AAT3152 |
Similar Part No. - AAT3152 |
|
Similar Description - AAT3152 |
|
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| 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 Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Indian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
