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HB LED driver with inhibit based on the ST1CC40 in an SO-8 BW package
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The STEVAL-ILL046V2 demonstration board is based on the ST1CC40, which is an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as a precise constant current source with an adjustable current capability of up to 3 A DC.

In closed loop operation, the ST1CC40 feedback pin voltage is 100 mV, thus the sensing resistor calculation is expressed as Rs = 100mV/ILED

The STEVAL-ILL046V2 is provided with 660 mA by connecting a 150 mΩ sensing resistor to the feedback pin.

The overall application size is minimized, thanks to the high switching frequency and ceramic output capacitor compatibility.

The STEVAL-ILL046V2 demonstration board is fully protected against overheating, overcurrent and output short-circuit.

The inhibit mode minimizes the current consumption in standby (6 μA) to maximize battery life in portable devices.

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Errata Sheet
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Data Brief

Key Features

  • 3 to 18 V operating input voltage range
  • 850 kHz fixed switching frequency
  • 100 mV (typ) current sense voltage drop
  • 6 μA standby current in inhibit mode
  • ±7% output current accuracy
  • Synchronous rectification
  • Embedded compensation network
  • Internal current limiting
  • Ceramic output capacitor compliant
  • Thermal shutdown
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1863: HB LED driver with inhibit based on the ST1CC40 in an SO-8 BW package
1.0 130 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ILL046V2 gerber files
1.0 178 KB

Bill of Materials

Description Version Size
1.0 8 KB

Schematic Pack

Description Version Size
STEVAL-ILL046V2 schematics
1.0 72 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ILL046V2ActiveST1CC40Buy Direct35.52Distributor reported inventory date: 2015-12-01
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA30

(*) 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.
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