Datenblatt-Suchmaschine für elektronische Bauteile |
|
AAT2842 Datenblatt(PDF) 1 Page - Advanced Analogic Technologies |
|
AAT2842 Datenblatt(HTML) 1 Page - Advanced Analogic Technologies |
1 / 21 page AAT2842 High-Current Charge Pump with S2Cwire™ Control and Dual LDO for Backlight and Flash 2842.2006.10.1.0 1 ChargePump™ General Description The AAT2842 is a highly integrated charge pump with dual linear regulators optimized for systems operating with lithium-ion/polymer batteries. The charge pump provides power for both white LED backlight/keypad and flash. Up to four backlight LEDs can be driven at up to 30mA each and key- pad LEDs can be driven using lower currents set by the S2Cwire interface. In addition, up to four flash LEDs can be driven with up to 600mA total. Two separate S2Cwire™ (Simple Serial Control™) serial digital interfaces are used to enable, disable, and set the current to one of 16 levels for both backlight and flash LEDs. Backlight/keypad and flash current settings are also controlled through external resis- tors for increased versatility with reduced accuracy and matching. Backlight/keypad current matching is 1% for uniform display brightness, and flash cur- rent matching is 4% for uniform power dissipation. An integral flash timer set by an external capacitor protects the flash LED should a fault occur. The AAT2842 offers two high-performance MicroPower™ low dropout (LDO) linear regulators. A single enable input controls both regulators and each supplies up to 200mA to the load. Both LDOs consume only 85µA quiescent current, making them ideal for battery-operated applications. The AAT2842 is equipped with built-in short-circuit and over-temperature protection. The charge pump soft-start circuitry prevents excessive inrush current at start-up. The product is available in a Pb-free, space-saving TQFN44-28 package and operates over the -40°C to +85°C ambient temperature range. Features •VIN Range: 2.7V to 5.5V • Tri-Mode Charge Pump: — Drives up to Four Backlight/Keypad and Four Flash LEDs — Separate S2Cwire Control for Backlight/Keypad and Flash Currents — Backlight/Keypad and Flash Current Set by Separate External Resistors — Flash Timer Set with External Capacitor — Up to 2MHz Switching Frequency • Two Linear Regulators: — 200mA Output Current — 200mV Dropout — Output Voltage Adjustable from 1.2V to VBATTERY — Output Auto-Discharge for Fast Shutdown — 85µA Quiescent Current • Built-In Thermal Protection • Automatic Soft Start • -40°C to +85°C Temperature Range • Available in 4x4mm TQFN44-28 Package Applications • Camera-Enabled Mobile Devices • Digital Still Cameras • Multimedia Mobile Phones Typical Application C1+ C1- C2+ C2- IN C1 1µF C2 1µF COUT 2.2µF CIN 4.7µF OUT BL1 BL2 BL3 BL4 BENS EN_BACKLIGHT ENL EN_LDO VOUT LDOA R2A R1A OUTA FBA COUTA VOUT LDOB R2B R1B OUTB FBB COUTB CREF REF VBAT RSET1 RSET2 FSET BSET PGND FENS EN_FLASH IN FL1 FL2 FL3 FL4 CT CT AGND AAT2842 |
Ähnliche Teilenummer - AAT2842 |
|
Ähnliche Beschreibung - AAT2842 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller 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 |