ADI LTC3490ES8#TRPBF

DC DC 稳压器1V3.2V350mA

Overview

The LTC3490ES8 provides a constant current drive for 1W LED applications. It is a high efficiency boost converter that operates from 1 or 2 NiMH or alkaline cells and generates 350mA of constant current with up to 4V of compliance. It contains a 100mΩ NFET switch and a 130mΩ PFET synchronous rectifier. The fixed switching frequency is internally set to 1.3MHz.

The LTC3490ES8 limits the output voltage to 4.7V if the output load is disconnected. It also features an analog dimming capability that reduces the drive current proportional to the CTRL/SHDN pin voltage. A low-battery logic output signals when the battery has dropped below 1V/cell. An undervoltage lockout circuit shuts down the LTC3490ES8 when the battery voltage drops below 0.85V/cell. The feedback loop is internally compensated to minimize component count.

Features

Tape & Reel (TR) Package
Available in the 8-SOIC (0.154, 3.90mm Width) package
Operating temperature of -40°C~85°C TA
Frequency of 1.3MHz
Supply voltage of 2.5V

Surface Mount Mounting Type

Applications

There are a lot of Linear Technology/Analog Devices
LTC3490ES8#TRPBF LED Driver ICs applications.

• General lighting
• Down lighting
• Architectural lighting
• Street lighting
• Stage and Studio lighting
• Refrigeration lighting
• Portable lighting
• Gallery lighting
• Museum lighting
• High-end retail lighting