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LTC3490
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LTC3490

  • Category:LED driver
  • Product Name:A single battery provides a 350mA LED driver
  • Manufacturers:LT
  • Production Batch Number:11+
  • Encapsulation:DFN-8, SO-8
  • Stock Status:There is stock
  • Stock Quantity:20000
  • Minimum order quantity: 1
  • Details:Click to find the PDF of the LTC3490
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  • Product introduction

LTC3490 a single battery provides a 350mA LED driver

description

LTC®The 3490 provides a constant current drive for 1W LED applications. It is a high-efficiency boost converter that operates from a single or two NiMH or alkaline batteries, generates a constant current of 350mA, and meets voltage specifications up to 4V. It contains a 100mΩ NFET switch and a 130mΩ PFET synchronous rectifier. The fixed switching frequency is internally set to 1.3MHz.

If the output load is disconnected, LTC3490 limits the output voltage to 4.7V. It also features an analog dimming capability that reduces the drive current in proportion to the CTRL/SHDN pin voltage. When the battery voltage drops below 1V per cell, a low battery logic output signal is transmitted. When the battery voltage drops below 0.85V per cell, the undervoltage lockout circuit shuts down for LTC3490. Internal compensation of the feedback loop is implemented to minimize component count.

apply

  • Portable lighting
  • Rechargeable flash

peculiarity

  • 350mA constant current output
  • Compatible with 2.8V to 4V output
  • Single or two NiMH or alkaline battery inputs
  • Synchronous rectification: up to 90% efficiency
  • Fixed operating frequency: 1.3MHz
  • Low quiescent current:
  • Very low shutdown current:
  • The open-circuit LED output is limited to 4.7V
  • VINRange: 1V to 3.2V
  • Dimming control
  • Undervoltage lockout designed to protect the battery
  • Available in low profile (only 0.75mm height) 3mm x 3mm thermally enhanced 8-pin DD and S8 packages
     

andLTC3490Related ICs are:


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ISL83490IBZ-T Intersil 15+ SMD ISL83490IBZ-T
ISL83490IBZ Intersil 15+ SMD ISL83490IBZ
ISL83490IB Intersil 15+ SMD ISL83490IB
ZT3490LEEN Zywyn Corporation 15+ SMD ZT3490LEEN
LTC3490 LT 11+ DFN-8, SO-8 A single battery provides a 350mA LED driver
MAX3490CSA MAXIM 10+11+ SOP-8 Hong Kong spot, imported original
SP3490EN-L/TR SIPEX 10+11+ SOP8 Hong Kong spot, imported original
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LM3490IM5-3.3/NOPB   10+11+   Hong Kong spot, imported original
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