One LED White LED Driver for Lighting

Reference Design using part SP6121 by MaxLinear

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Manufacturer

MaxLinear
  • Application Category
    Lighting
  • Product Type
    White LED Driver

For End Products

  • Lighting

Description

  • Circuit has been designed to provide 3 to 5Vin boost to White LEDs at approximately 4V output at 1.5Amps.High efficiency and 3-5Volt input dictated the choice of the controller and external components. In order to reduce the reference voltage to a low 150mV and improve efficiency, an additional IC Op-Amp (LMV321) was used to amplify the reference to 1.2V feedback voltage. The SP6121 is the synchronous buck controller that is being used as a buck/boost DC/DC controller

Key Features

  • Input Voltage
    3 to 5 V
  • Output Voltage
    3.9 V
  • Output Current
    1.5 A
  • Number of Derived Elements
    1

Featured Parts (3)

Featured Parts
Part Number Manufacturer Type Description
LMV321SN3T1G onsemi Operational Amplifiers - Op Amps Op Amp Single Low Voltage Amplifier R-R O/P 5V 5-Pin TSOP T/R Buy
LMV321AS5X-G onsemi Operational Amplifiers - Op Amps GENERAL PURPOSE, LOW VOLTAGE, RAIL-TO-RAIL OUTPUT AMPLIFIERS Buy
LMV321SQ3T2G onsemi Operational Amplifiers - Op Amps Op Amp Single Low Voltage Amplifier R-R O/P 5V 5-Pin SC-88A T/R Buy

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