4 A monolithic step-down current source with synchronous rectification

The LED2001 is an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as precise constant current source with an adjustable current capability up to 4 A DC. The embedded PWM dimming circuitry features LED brightness control. The regulated output current is set connecting a sensing resistor to the feedback pin. The embedded synchronous rectification and the 100 mV typical RSENSE voltage drop enhance the efficiency performance. The size of the overall application is minimized thanks to the high switching frequency and ceramic output capacitor compatibility. The device is fully protected against thermal overheating, overcurrent and output short-circuit. The LED2001 is available in VFQFPN 4 mm x 4 mm 8-lead package, and HSOP8.

Key Features

  • 3.0 V to 18 V operating input voltage range
  • 850 kHz fixed switching frequency
  • 100 mV typ. current sense voltage drop
  • PWM dimming
  • ± 7% output current accuracy
  • Synchronous rectification
  • 95 mΩ HS / 69 mΩ LS typical RDS(on)
  • Peak current mode architecture
  • Embedded compensation network
  • Internal current limiting
  • Ceramic output capacitor compliant
  • Thermal shutdown

Design

Technical Documentation

Product Specifications
Description Version Size
DS9524 DS9524: 4 A monolithic step-down current source with synchronous rectification 1.0 2 MB

Publications and Collaterals

Brochures
Description Version Size
Brochure Power management guide 05.2016 4 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools
eDesignSuite Support & Community


Sample & Buy

Part Number Marketing Status Quantity Unit Price (US$) * Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
LED2001PHR Active 1000 0.935 PowerSO-8 Tape And Reel -40 150 NEC EAR99 PHILIPPINES MORE INFO DISTRIBUTOR AVAILABILITY
LED2001PUR Active 1000 0.935 VFDFPN 8 4x4x1.0 Tape And Reel -40 150 NEC EAR99 MALAYSIA MORE INFO Get Sample 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**
LED2001PHR ActivePowerSO-8IndustrialEcopack2 0 0
LED2001PUR ActiveVFDFPN 8 4x4x1.0IndustrialEcopack2 0 0
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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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