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AAT2805

Features: VINRange: 2.7V to 5.5VDual Charge Pump to Support Backlight andFlash LEDsBacklight Charge Pump:--Regulated Curren--Four Current Sink Input--A2Cwire Brightness Control --Tri-Mode Charge Pum--Maximum 30mAof Current Per Inpu--Low LQ(50A) in Light Load ModFlash Charge Pump:--Regulated Output...

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SeekIC No. : 004261098 Detail

AAT2805: Features: VINRange: 2.7V to 5.5VDual Charge Pump to Support Backlight andFlash LEDsBacklight Charge Pump:--Regulated Curren--Four Current Sink Input--A2Cwire Brightness Control --Tri-Mode Charge Pum...

AAT2805 Data Sheet

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Part Number:
AAT2805
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/21

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Product Details

Description



Features:

VINRange: 2.7V to 5.5V
Dual Charge Pump to Support Backlight and
Flash LEDs
Backlight Charge Pump:
--Regulated Curren
--Four Current Sink Input
--A2Cwire Brightness Control
--Tri-Mode Charge Pum
--Maximum 30mAof Current Per Inpu
--Low  LQ(50A) in Light Load Mod
Flash Charge Pump:
--Regulated Output Voltag
--Up to 250mAof Pulsed Curren
Independent Backlight/Flash Control
Low Noise 1MHz Constant Frequency
Operation
Automatic Soft-Start
No Inductors
Available in TDFN44-16 Package


Application

Color (RGB) Lighting
White LED Backlighting
White LED Photo Flash


Pinout

Connection Diagram


Specifications

Symbol Description Value Units
VIN Input Voltage -0.3 to 6.0 V
V EN/SET EN_FL
 EN/SET; EN_FLto GND Voltage -0.3 to VIN + 0.3 V
TLEAD Maximum Soldering Temperature (at leads, 10 sec) 300 °C



Description

The AAT2805 is a dual charge pump designed to support both the white LED backlight and flash appli- cations for systems operating with lithium-ion/poly- mer batteries.  The backlight charge pump is capable of driving up to four LEDs at a total of 120mA.

The current sinks may be operated individually or in par- allel for driving higher current LEDs. To maximize power efficiency, the charge pump AAT2805 operates in 1X, 1.5X, or 2X mode, where the mode of operation is automatically selected by comparing the forward voltage of each LED with the input voltage. AnalogicTech's A2S Cwire™(Advanced Simple Serial Control™serial digital input is used to enable, dis- able, and set current for each LED with a 16-level logarithmic scale plus four low-current settings down to 50Afor optimized efficiency, with a typical oper ating quiescent current of less than 50A




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