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STEVAL-ILL035V1

Multi-channel LED driver with integrated boost controller for medium, large LCD panel backlight based on LED7708 and STM32F103C6T6A
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The purpose of the STEVAL-ILL035V1 demonstration board is to provide an application example of a compact LED backlight driver using the LED7708 device.

The board is equipped with a 16-channel LED driver with integrated boost controller (the LED7708), power section components, and an STM32 microcontroller to easily control all the features via a USB connection.

The output voltage required by the LED strings connected to the output channels is derived from a single input rail and continuously adjusted to minimize the voltage drop (and power dissipation) across them, despite an independent PWM duty cycle for each one. The brightness of each LED string is digitally controlled with 12- or 16-bit dimming resolution.

Embedded, programmable fault detection and management circuitry can be set to automatically disconnect faulty channels without the need for intervention by the host controller.

The board has been designed as a demonstration of a solution for medium/large LCD panel backlight drivers, but is suitable for any application involving several LEDs assembled in strings (e.g. advertisement panels, signs, gaming, etc.).

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Errata Sheet
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Data Brief

Key Features

  • Wide DC input voltage: 10 V to 28 V
  • Integrated boost converter with adaptive output voltage for minimum power dissipation
  • Up to 92% boost converter efficiency
  • 16 channels with up to 85 mA/ch current capability and independent PWM brightness control
  • Up to 15 white LEDs per channel
  • On-board STM32 microcontroller for total device control through 4-wire serial interface
  • Embedded open-channel and LED short-circuit faults management
  • USB connection for device control through dedicated PC-GUI
  • Expansion connector to support slave devices (daughterboard)
  • RoHS compliant

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Design Resources

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Technical Documentation

Product Specifications

Description Version Size
pdf
DB1657: Multi-channel LED driver with integrated boost controller for medium, large LCD panel backlight based on LED7708 and STM32F103C6T6A
1.0 251 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
zip
STEVAL-ILL035V1 gerber files
1.0.0 667 KB

Bill of Materials

Description Version Size
pdf
STEVAL-ILL035V1 BOM
1.0.0 56 KB

Schematic Pack

Description Version Size
pdf
STEVAL-ILL035V1 schematics
1.0.0 97 KB

Sample & Buy

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Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ILL035V1ActiveLED7708; STM32F103C6T6Buy Direct121.27Distributor reported inventory date: 2014-11-27
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20
P&SOrder NowASIA/PACIFIC11
DIGIKEYOrder NowWORLDWIDE31
MOUSEROrder NowWORLDWIDE61
Ecopack2-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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