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AAT3156

Features: VINRange: 2.7V to 5.5VFully Programmable Current with Single Wire--16-Step Logarithmic Scal--15/20/30mAMax Curren--Four Low Current Settings Down to 50|--Low LQ(50A) for Low Current ModTri-Mode 1X, 1.5X, and 2X Charge Pump forMaximum Efficiency and VFCoverageDrives Six Channels of LEDsIn...

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SeekIC No. : 004261125 Detail

AAT3156: Features: VINRange: 2.7V to 5.5VFully Programmable Current with Single Wire--16-Step Logarithmic Scal--15/20/30mAMax Curren--Four Low Current Settings Down to 50|--Low LQ(50A) for Low Current ModTri...

AAT3156 Data Sheet

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Part Number:
AAT3156
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

VINRange: 2.7V to 5.5V
Fully Programmable Current with Single Wire
--16-Step Logarithmic Scal
--15/20/30mAMax Curren
--Four Low Current Settings Down to 50|
--Low  LQ(50A) for Low Current Mod
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and VFCoverage
Drives Six Channels of LEDs
Individual Main/Sub-Group Control
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
Built-In Thermal Protection
Built-In Auto-Disable For Open Circuit
Automatic Soft-Start
IQ<1Ain Shutdow
Thermally-Enhanced QFN44-16 Package


Application

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


Pinout

Connection Diagram


Specifications

Symbol Description
 Value Units
VIN,
 Input Voltage -0.3 to 6.0 V
VEN/SET
 EN/SETto GND Voltage -0.3 to VIN + 0.3 V
IOUT2
 Maximum DC Output Current 180 mA
TJ
 Operating Junction Temperature Range -40 to 150 °C
TLEA

 Maximum Soldering Temperature (at leads, 10 sec) 300 °C



Description

The AAT3156 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and dou-bling (2X) conversion to maximize efficiency for white LED applications. The AAT3156 is capable of driving six-channel LEDs at a total of 180mAfrom a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving high-er-current LEDs. Alow external parts count (two 1F flying capacitors and two small 1F capacito at V IN and V OUT) make this part ideally suited for small battery-powered applications.




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