AAT1405

4 Channel LED Backlight Driver with Integrated Boost and High Frequency Direct PWM Dimming


The AAT1405 is a high efficiency four LED strings backlight driver optimized for notebook computers, monitors and portable TVs. The integrated boost converter and precision current sinks operate from DC inputs, cigarette lighter adapters, or multi-cell Li-ion batteries over the 4.5V to 26V voltage range. The AAT1405 drives up to 44 LEDs at 120mA total LED current. The high (100 kHz) PWM frequency ensures silent operation.

Please note: AAT1405 is not recommended for new designs.

Specifications

Number of LEDs44
LED Channels4
LED(s) per/Ch11
Min. VIN (V)4.5
Max. VIN (V)26
InterfacePWM
Typ. IQ (μA)1.5
Peak Efficiency92%
Current Accuracy (%)±2
Current Matching (%)±2.0%
Max. IOUT per/Ch (mA)30
PackageTQFN34, 24L
Package (mm)3 x 4 x 0.75
PackageTQFN34-24

Features

  • Up to 92% Efficiency over Wide Input Voltage Range
  • VIN Range: 4.5V to 26.0V
  • LX Rated to 50V
  • Up to 4 LED Current Sinks at 30mA each
  • Flexible Configurations – Channels: Disable or Parallel
  • Fault Tolerant: Open/Short LED(s)
  • Current Limit Protection, Over-Voltage Protection, Over-Temperature Protection
  • Soft-Start Minimizes Inrush Current
  • TQFN34-24 Low Profile Package
  • -40°C to +85°C Temperature Range

Product Documents