LCD panels backlight demonstration board based on the LED7706

This demonstration board is based on the LED7706 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 30 mA and can be dimmed via a PWM signal (1% dimming duty cycle at 20 kHz 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.

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 control200 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
  • RoHS compliant
  • Features backlight driver sectionsix rows with 30 mA maximum current capability (adjustable)pp to 10 white LEDs per rowrows disable optionless than 500 ns minimum dimming time (1% minimum dimming duty-cycle at 20 kHz dimming frequency)±2.0% current matching between rowsLED failure (open and short circuit) detection

Image

×

Design

Technical Documentation

Product Specifications
Description Version Size
DB0821 DB0821: LCD panels backlight demonstration board based on the LED7706 1.1 252 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
Gerber files for STEVAL-ILL020V1 board 1.0 92 KB
Bill of Materials
Description Version Size
BOM for STEVAL-ILL020V1 board 1.0 53 KB
Schematic Packs
Description Version Size
Board schematics for STEVAL-ILL020V1 board 1.0 32 KB

Legal

License Agreement
Description Version Size
Evaluation products license agreement 1.0 125 KB
Support & Community
Related Applications

Sample & Buy

Part Number Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ILL020V1 LED7706 Active 55.13 1 NEC EAR99 ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
test

(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-ILL020V1 ActiveCARDIndustrialEcopack2
test

(**) 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.

×