ST Life.augmented


High-efficiency switching LED driver demonstration board for high-current LEDs based on L6726A

Rapid advances in LED technology has led to increases in their output current capabilities in recent years. 0.350 A LEDs, for example, were soon followed by 0.7 A LEDs, and then 1 A devices appeared shortly thereafter. Currently, LEDs with currents as high as several amps are present on the market. However, these high currents increase the requirements of the driving circuitry of the LEDs, particularly in terms of efficiency.

The STEVAL-ILL023V1 demonstration board is based on the L6726A single phase PWM controller, with two external MOSFETS for synchronous rectification. Designed for 2.8 A LEDs (1-3 in a series string), the main benefit of the solution is its exceptional efficiency. Ease of dimming and scalability to even higher currents are additional advantages of the design.

The solution is also much safer with regard to border conditions, since the current limit is based solely on the selection of the MOSFETS.

pdf Please read
Errata Sheet
pdf Download
Data Brief

Key Features

  • Input voltage Vin: 8 V to 18 V
  • Output voltage (with Vin = 18 V): 2.5 V to 14 V
  • Output current ILED: 1 A / 1.5 A / 2.8 A
  • Analog dimming (with ILED= 0 A): 0 V to 2.5 V
  • Low level PWM signal: 0 V
  • High level PWM signal: 2.8 V to 3.8 V (typ: 3.3 V)
  • Duty cycle (at fdim = 200 Hz): 0% to 99 %
  • Efficiency (with Vin = 18 V and Vout = 12.6 V): 94.8 %


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6114: Demonstration board: high-efficiency switching LED driver for high-current LEDs based on the L6726A
1.1 129 KB

User Manual

Description Version Size
UM0677: High-efficiency switching LED driver for high-current LEDs
2.1 780 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
Gerber files for STEVAL-ILL023V1 board
1.0 25 KB

Bill of Materials

Description Version Size
BOM for STEVAL-ILL023V1 board
1.0 9 KB

Schematic Pack

Description Version Size
Board schematics for STEVAL-ILL023V1 board
1.0 85 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-ILL023V1 High-efficiency switching LED driver demonstration board for high-current LEDs based on L6726A

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ILL023V1NRNDL6726A-51Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20

(*) 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 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