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iW7038

High Precision, 16-Channel LED Backlighting Driver with Integrated Current Sinks for High Dynamic Range (HDR) LCD Displays

iw7038_typical_applications_diagram-web.jpg

BroadLED™ Technology Improves Thermal Performance for High Ambient Temperature Applications

The iW7038 LED driver for LCD backlighting integrates 16 precision current sinks with advanced digital control technology to improve brightness control in High Dynamic Range (HDR) displays.  The digital control block uses Dialog’s BroadLED™ adaptive switch technology, improving thermal performance by optimizing the voltage drop across each LED string, while enabling precision matching with unbinned LEDs. 

The iW7038 also uses Dialog’s patented AnyMode™ dimming, which offers comprehensive, simple and flexible options to improve HDR display picture quality. It allows continuous PWM signals or very narrow PWM burst signals that are fully synchronized to the video frame at the same or higher frequency. The PWM duty cycle can be updated in each video frame and with user-configurable tail or head delays. This provides more options to reduce motion blur and improve the contrast ratio.

AnyMode dimming also helps reduce motion blur caused by the human visual system (HVS) by generating high intensity, short duration PWM pulses. This results in faster fade out and reduces the physiological afterimage effects of the HVS, important for automobile dashboard displays.

Lifecycle status

● Active

Features

16-channel LED driver with internal MOSFET current sinks

55V maximum output voltage per channel

Patented BroadLED™ adaptive switch mode technology for high current matching at maximum efficiency

  • Reduces power dissipation requirements
  • Enables use of cheaper, loosely binned LED arrays for lower BOM cost

Flexible input supply voltage rating:  12V (9V-16V)

AnyMode™ comprehensive dimming control improves picture quality

  • 13-bit PWM dimming or 11-bit global dimming to improve contrast ratio
  • Head, tail, center mode PWM alignments to reduce motion blur
  • 9-bit independent analog dimming
  • PWM dimming range: 0% to 99.9%
  • Programmable slew rate – better EMI control

Comprehensive protection features:

  • Individual LED short protection
  • Channel-to-channel short protection
  • Current sink MOSFET drain-to-source short protection
  • Current sense resistor short protection
  • Microcontroller interrupt interface
  • LED open-fault detection
  • Over-temperature protection

External current sense resistors – maximum flexibility for current requirements

  • 200mA per channel max; supports 2-channel grouping

SPI daisy-chain interface simplifies design when supporting more than 16 LED strings

3 SPI communication protection modes in one LED driver

Internal PLL ensures jitter-free operation even with noisy VSYNC signal

Applications

LCD Backlighting for HDR LCD TV, Monitor and Notebook Displays

Automotive Displays

Block Diagrams

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Typical Applications Diagram

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Functional Block Diagram

To order a sample of any of our products, please complete the following form. We will provide up to five parts free of charge. Our sales department will provide pricing for samples orders exceeding five parts.

Sample Request Form

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Product Briefs and Summaries
Name Date Version
iW7038 Product Summary (521.76 KB) 14/05/2018 1.0