ST Life.augmented

STEVAL-ILL021V1

LCD panels backlight demonstration board based on the LED7707
  • active Active

This demonstration boards is based on the LED7707 and implements a high efficiency monolithic boost converter and six controlled current generators (rows) specifically designed to supply LEDs arrays used in the backlight of LCD panels.

The device can manage an output voltage up to 36 V (i.e. ten white-LEDs per row).

The generators can be externally programmed to sink up to 85 mA and can be dimmed via a PWM signal (1% of minimum dimming duty cycle at 1kHz can be managed).

The device allows to detect and manage the open and shorted LED faults and to let unused rows floating.

Basic protections (output overvoltage, internal MOSFET overcurrent and thermal shutdown) are provided.

pdf Please read
Errata Sheet
pdf Download
Data Brief

Key Features

  • Features boost section4.5 V to 36 V input voltage rangeinternal power MOSFETinternal +5 V LDO for device supplyup to 36 V output voltageconstant frequency peak current-mode control250 kHz to 1 MHz adjustable switching frequencyexternal sync for multi-device applicationpulse-skip power saving mode at light loadprogrammable soft-startprogrammable OVP protectionsingle ceramic output capacitornon-latched thermal shutdown
  • Features backlight driver sectionsix rows with 85 mA maximum current capability (adjustable)up to 10 white LEDs per rowrows disable optionless than 10 μs minimum dimming time±2.0% current matching between rowsLED failure (open and short circuit) detection
  • RoHS compliant

Image

Design Resources

Top

Technical Documentation

Product Specifications

Description Version Size
pdf
DB0822: LCD panels backlight demonstration board based on the LED7707
1.1 252 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
zip
Gerber files for STEVAL-ILL021V1 board
1.0 92 KB

Bill of Materials

Description Version Size
pdf
BOM for STEVAL-ILL021V1 board
1.0 54 KB

Schematic Pack

Description Version Size
pdf
Board schematics for STEVAL-ILL021V1 board
1.0 33 KB

Sample & Buy

Top
Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ILL021V1ActiveLED7707Buy Direct57.87Distributor reported inventory date: 2014-07-28
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20
Farnell Element14Order NowEUROPE21
DIGIKEYOrder NowWORLDWIDE41
MOUSEROrder NowWORLDWIDE31
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.
Feedback Form
Customer Feedback