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Product Overview

The LM3501TL-16EV is an evaluation board for LM3501, a synchronous step up DC to DC converter designed for white LED applications. The evaluation board is set up to drive three standard VF white LEDs from a single Li ion battery. A fourth LED pad (D4) is included for testing of up to 4 low VF white LEDs. The LED current is set using the resistor R2 and is determined by the voltage applied to the CNTRL pin. The maximum value of VFB is 0.515V and occurs with a CNTRL voltage of approximately 2.7V. This condition translates into approximately 20mA LED current. A lower CNTRL voltage will translate into a lower VFB voltage and a lower LED current. The feedback voltage can be calculated using the equation VFB = 0.191 × CNTRL. A CNTRL voltage of 125mV or greater turns the LEDs on while a CNTRL voltage of 75mV or less turns the LEDs off.
  • Synchronous rectification, high efficiency and no external schottky diode required
  • Uses small surface mount components
  • Can drive up to 3 (or 4 low VF) white LEDs in series
  • 2.7V to 7V input range
  • True shutdown isolation, no LED leakage current
  • DC voltage LED current control
  • Input under voltage lockout
  • Output overvoltage protection, no external zener diode required
  • Requires only a small 16V ceramic capacitor at the output
  • 0.1μA shutdown current


Power Management; Portable Devices; LED Lighting; Imaging, Video & Vision
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Product Information

  • Core Chip LM3501
  • Device Topology Buck (Step Down)
  • No. of Outputs 1Outputs
  • Output Current 20mA
  • Output Voltage 16V
  • Input Voltage Min 2.7V
  • Input Voltage Max 7V
  • Dimming Control Type -
  • Kit Contents Eval Board LM3501
  • Product Range -
  • Input Voltage 2.7V to 7V
  • SVHC No SVHC (15-Jun-2015)
  • Topology Buck (Step Down)

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Legislation and Environmental

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