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STLED25

5 channels step-up white LED driver
  • active Active

The STLED25 is a fixed frequency, high efficiency, boost DC-DC converter with five parallel high side current sources. It is capable of providing 125 mA of total current with a maximum voltage of 7.5 V on each channel. Each current source supports single or dual LED connection. The output voltage of the step-up converter is automatically set at 100 mV above the highest voltage required on any driver, to guarantee proper operation of the linear current sources. The device implements a self-test feature to detect failure of any of the LEDs and to disable the related channel. The failure status is reset as soon the IC is disabled. This mode of failure detection allows the device to continue operating driver channels that are functioning normally, while avoiding excessive power consumption or associated thermal issues. The control technique is able to maintain the efficiency close to 87% at medium load and higher than 85% at light or full load. The device also includes soft-start control, inrush current limit, thermal shutdown and inductor peak current limit. The STLED25 is packaged in a 12-bump CSP (1.4 x 1.8 mm, 0.5 mm height).

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Errata Sheet
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Datasheet

Key Features

  • Operating input voltage range from 2.3 V to 5.5 V
  • ± 7.5% LED current accuracy
  • Two LEDs in series per channel
  • High side current source
  • Up to 125 mA of total LED current
  • 86% efficiency at 100 mA
  • PWM dimming with automatic shutdown time window
  • 2.5 MHz switching frequency
  • CSP 12 bumps 0.4 mm. pitch 1.4 x 1.8 mm.

Design Resources

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Technical Documentation

Product Specifications

Description Version Size
pdf
DS8694: 5 channels step-up white LED driver
3.0 2,174 KB

Application Notes

Description Version Size
pdf
AN4140: STLD41 output power capability
1.0 1,468 KB

Sample & Buy

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Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
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Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STLED25JRActiveFlip-Chip 400uTape And Reel-3085_Free SamplesDistributor reported inventory date: 2014-07-24
Distributor NameRegionStockMin. order
RUTRONIKOrder NowEUROPE401
DIGIKEYOrder NowWORLDWIDE78861
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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