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CE9401 - Single Cell 350mA / Dual Cell 1A LED Driver

Description

Switch Pin.

Connect inductor between SW and VIN.

A Schottky diode is connected between SW and VOUT.

Features

  • :.
  • 350mA/1A Constant Current Output.
  • 2.8V to 4V Output Compliance.
  • 1- or 2-Cell NiMH or Alkaline Input.
  • Low RDS(ON) : 100mΩ (Typ. ).
  • 95mV Feedback Voltage.
  • 1MHz Switching Frequency.
  • Uses small, Low Profile External Components.
  • Ceramic Capacitor Compatible.
  • LED Power Efficiency: up to 90%.
  • Current Accuracy: 5% (VIN=3.6V to 1.8V@VF=3.7V).
  • Low Start-Up Voltage: 0.9V(ILED =270mA).
  • Low Hold Voltage:0.75V(ILED =200mA).
  • Open LED Output Lim.

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Datasheet Details

Part number CE9401
Manufacturer Chipower
File Size 702.05 KB
Description Single Cell 350mA / Dual Cell 1A LED Driver
Datasheet download datasheet CE9401 Datasheet

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Full PDF Text Transcription

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Single Cell 350mA, Dual Cell 1A LED Driver CE9401 Series  INTRODUCTION: The CE9401 provides a constant current drive for 1W or 3W LED applications. It is a high efficiency boost converter that operates from 1 or 2 NiMH or alkaline cells and generates 350mA/1A of constant current with up to 4V of compliance. The LED current can be programmed by the external current sense resistor, RSET, connected between the feedback pin (FB) and ground. A low 95mV feedback voltage reduces the power loss in the RSET for better efficiency. With its internal 2A, 100mΩ NMOS switch, the device can provide high efficiency even at heavy load. The device switches at a 1MHz constant frequency, allowing for the use of small value external inductor and ceramic capacitors. The CE9401 limits the output voltage to 5.
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