White LED Controller based on STLD40D

This evaluation board is based on the STLD40D that is a boost converter that operates from 3.0 V to 5.5 V and can provide an output voltage as 37 V and can drive up to 10 white LEDs in series. The converter is a PFM (pulse frequency modulation) inductor switches and can work in discontinuous (DCM) mode operation. A minimum OFF time of the embedded boost switch TSW is fixed internally and allows limiting the switching frequency. The output current capability is 20 mA with an output voltage of 37 V. The regulation is done by sensing the led current through the resistor RLED. The device can be turned ON/OFF through the logic enable signal pin EN. Applying a low frequency PWM signal the LEDs can be dimmed. The maximum peak inductor current can be programmed.

Key Features

  • Low shutdown current <1 μA
  • Enable pin with possibility of PWM dimming control
  • Inductor switches boost controller
  • High efficiency over wide range of input voltage from 3.0 V to 5.5 V
  • PFM mode control
  • Adjustable peak current limit
  • Over-voltage protection with automatic restart

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Design

Technical Documentation

Product Specifications
Description Version Size
DB0707 DB0707: White LED controller evaluation board based on the STLD40D 1.2 60 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-TLL001V1 gerber files 1.0 154 KB
Bill of Materials
Description Version Size
STEVAL-TLL001V1 BOM 2.1 6 KB
Schematic Packs
Description Version Size
Board schematic 1.0 12 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-TLL001V1 STPS1L40M Active 35.53 1 NEC EAR99 ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
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(*) 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-TLL001V1 ActiveCARDIndustrialEcopack2
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(**) 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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