Not Recommended for New Designs

A team of engineers is ready to answer your questions

Not Recommended for New Designs

32-channel, internal current sinks 120mA per channel

The iW7032 integrates 32 open-drain current sinks, two LDOs and digital control for two external DC/DC converters (step-up or step-down) to provide a complete solution for LED backlighting in applications such as LCD TVs. Using Dialog's innovative BroadLED™ technology, the iW7032 maintains channel-to-channel current matching of better than 2% and integrates Dialog's proprietary adaptive switch technology, significantly reducing power loss in LED backlighting applications. 

Each LED channel can operate from a supply up to 56V at maximum average current of 150mA, with a peak current of 240mA when in adaptive switch mode. The iW7032 provides direct control of two external DC/DC converters which, through dynamic voltage control, selects the lowest possible voltage on the output of the DC/DC converter to maintain the minimum programmed current through the LED strings without wasting any additional energy.

This feature, along with the adaptive switch technology, which utilizes a proprietary pulse-width modulation (PWM) scheme to individually regulate the current in each string of LEDs to minimize power loss while maintaining channel-to-channel current matching, enables LCD TVs using the iW7032 as its backlighting controller to meet stringent Energy Star® standards established for HDTVs. The iW7032 protects each LED string from various fault conditions such as LED open/short on a cycle-by-cycle basis to maximize reliability. The IC itself is protected from faults like over voltage, over temperature and under-voltage lockout to ensure proper start-up and shutdown.


  • 32-Channel LED Driver, 56V max LED voltage capable at 120mA average, 192mA peak current/channel
    • 120mA max in dimming mode
    • 192mA max in scanning mode and in dimming mode with 60% adaptive-switch mode
  • Patented Adaptive-Switch Mode LED Driving Scheme to Maximize Channel Efficiency
  • 2 Controllers for External DC/DC Converters - Independent Dynamic Voltage Control of Each DC/DC


  • SPI Interface for High-Bandwidth Control and Local Dimming
  • LED Brightness Dimming - Local, Scanning and 3D Game Mode
    • PWM Dimming Range - 1% to 99.9% with 10-bit Resolution
    • PWM Dimming Frequency - NTSC - 100Hz to 2.4kHz; PAL - 120Hz to 2.4kHz; 3D Game - 96Hz to 2.4kHz
  • LED Fault Protection - Open and Short Circuit - Cycle-by-Cycle Protection
  • Over-temperature and UVLO
  • Synch Function Allows Synchronization with Additional iW70xx Products


  • Edgelit Local Dimming for LED TVs
  • Direct and Segment-Edge LED Backlit LCD TVs
  • LCD Public Information Displays

Block Diagrams

Typical applications diagram
Functional block diagram



For technical support or information on how to buy, contact us directly.

Request Samples Contact Us Register for newsletter

Need technical help?

Visit our support web site to:

  • Get help from Dialog experts online.
  • Search the forums.
  • Access software, drivers, tools & utilities.