AAT3140

Features: VIN Range: 2.7V to 5.5VTri-Mode 1X, 1.5X, and 2X Charge PumMaximum Efficiency and V FCoverageDrives Low-V F and High-VFType LEDsUp to 4, 30mAOutputs32-Position Logarithmic Scale with Digit ControlLow Noise Constant Frequency Operati1MHz Switching FrequencyAutoBias TechnologySmall Applica...

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SeekIC No. : 004261121 Detail

AAT3140: Features: VIN Range: 2.7V to 5.5VTri-Mode 1X, 1.5X, and 2X Charge PumMaximum Efficiency and V FCoverageDrives Low-V F and High-VFType LEDsUp to 4, 30mAOutputs32-Position Logarithmic Scale with Digit...

floor Price/Ceiling Price

Part Number:
AAT3140
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: 2024/7/15

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Product Details

Description



Features:

VIN Range: 2.7V to 5.5V
Tri-Mode 1X, 1.5X, and 2X Charge Pum
Maximum Efficiency and V FCoverage
Drives Low-V F and High-VFType LEDs
Up to 4, 30mAOutputs
32-Position Logarithmic Scale with Digit Control
Low Noise Constant Frequency Operati
1MHz Switching Frequency
AutoBias Technology
Small Application Circuit
Regulated Output Current
Automatic Soft Start
No Inductors
I Q< 1Ain Shutdow
12-Pin TSOPJW Package





Application

Color (RGB) Lighting
Programmable Current Sources
White LED Backlighting
White Photo Flash for DSCs





Pinout

  Connection Diagram




Specifications

Symbol Description
Value Units
VIN
Input Voltage, POK -0.3 to 6 V
IOUT
DC Output Current -0.3 to V IN+ 0.3 mA
TJ
Operating Junction Temperature Range -40 to 150 °C


  • Tri-mode 1x, 1.5x, and 2x charge pump for maximum efficiency and VF coverage
  • Drives low-VF and high-VF type LEDs
  • Up to four 30mA outputs
  • 32-position logarithmic scale with digital control
  • Low noise constant frequency operation
  • 1MHz switching Frequency
  • Small application circuit
  • Regulated output current
  • Automatic soft-start
  • VIN range: 2.7V to 5.5V
  • No inductors
  • Iq < 1A in shutdown
  • 12-pin TSOPJW package





Description

The AAT3140 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 appli- cations. The device produces current levels up to 30mAon each of its four current source outputs to drive various arrangements of LEDs from a 2.7V to 5.5V input. Outputs may be operated individually or in parallel for driving higher-current LEDs. Alow external parts count (two 1F flying capacitors and two smal 1F capacitors at and CP) make the AAT3140 ide-IN ally suited for small battery-powered applications.



span id="lblDescription">

The AAT3140 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 device produces current levels up to 30mA on each of its four current source outputs to drive various arrangements of LEDs from a 2.7V to 5.5V input. Outputs may be operated individually or in parallel for driving higher-current LEDs. A low external parts count (two 1F flying capacitors and two small 1F capacitors at VIN and CP) make the AAT3140 ideally suited for small battery-powered applications. AnalogicTech Simple Serial Control (S2Cwire) digital input is used to enable, disable, and set the LED drive current with a 32-level logarithmic scale LED brightness control. The AAT3140 has a thermal management system to protect the device in the event of a short circuit condition at an output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. A high charge pump switching frequency enables the use of very small external capacitors. In shutdown mode, the device disconnects the load from VIN and reduces quiescent current to less than 1A. The AAT3140 is available in the very small 12-pin TSOPJW package.






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