 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AAT2803 Datasheet(PDF) 1 Page - Advanced Analog Technology, Inc. |
|
|
|||||||||||||||||||||||||||||
AAT2803 Datasheet(HTML) 1 Page - Advanced Analog Technology, Inc. |
|
|
1 / 16 page  AAT2803 Six-Channel White LED Backlight Charge Pump with Flash 2803.2006.12.1.6 1 ChargePump™ General Description The AAT2803 is a dual charge pump designed to sup- port both white LED backlight and flash applications for systems operating with lithium-ion/polymer batter- ies. The backlight charge pump is capable of driving up to six LEDs at a total of 180mA. The current sinks may be operated in group or in parallel for driving higher current LEDs. To maximize power efficiency, the charge pump operates in 1X, 1.5X, or 2X mode, where the mode of operation is automatically select- ed by comparing the forward voltage of each LED with the input voltage. AnalogicTech's AS2Cwire™ (Advanced Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED with a 16-level logarithmic scale plus four low- current settings down to 50μA for optimized efficien- cy, with a low housekeeping current of only 50μA. The flash charge pump is a charge pump doubler with a regulated output voltage. It is designed to deliver 120mA of continuous current and up to 300mA of pulsed current. It has an independent enable pin for improved power savings. The AAT2803 is equipped with built-in protection, short-circuit, and auto-disable for load short-circuit condition. Built-in soft-start circuitry prevents exces- sive inrush current during start-up. A low-current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1μA. The AAT2803 is available in a Pb-free, space-saving, thermally enhanced 24-pin 4x4mm QFN package and is rated over the -40°C to +85°C temperature range. Features •VIN Range: 2.7V to 5.5V • Dual Charge Pump: — Flash: Charge Pump Doubler — Backlight: Tri-Mode Charge Pump • Backlight Charge Pump: — Programmable Current With Single GPIO — 16 Current Steps — 15/20/30mA Max Current — Four Low Current Settings — Individual Main/Sub-Group Control — Low IQ (50μA) for Low-Current Mode — Drives Six Channels of LEDs • Flash Charge Pump: — Regulated VOUT_FL 4.5/5.0 Volts — Up to 300mA of Current for Flash • 1MHz Constant Switching Frequency • Independent Backlight/Flash Control • Built-In Thermal Protection • Built-In Auto-Disable for Open Circuit • Automatic Soft Start •IQ <1μA in Shutdown • Available in QFN44-24 Package Applications • Color (RGB) Lighting • Programmable Current Sink • White LED Backlighting • White Photo Flash for Digital Still Cameras Typical Application AAT2803 C IN 1 μF V IN C1 1 μF D2 GND Backlight C2 1 μF C3 1 μF C2+ C OUT 1 μF ENFL EN/SET VIN EN_FL Flash EN/SET C2- C1+ C1- C3+ C3- VOUT D3 D2 D1 D4 D5 D6 D1 D3 D4 D5 D6 C OUT 1 μF |
Similar Part No. - AAT2803 |
|
Similar Description - AAT2803 |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
