LT3494AEDDB#TRPBF

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LT3494AEDDB#TRPBF

IC REG BOOST ADJ 225MA 8DFN

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規格

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Function Step-Up
OutputConfiguration Positive
Topology Boost
OutputType Adjustable
NumberofOutputs 1
Voltage-Input(Min) 2.3V
Voltage-Input(Max) 16V
Voltage-Output(Min/Fixed) 2.3V
Voltage-Output(Max) 40V (Switch)
Current-Output 225mA (Switch)
SynchronousRectifier No
OperatingTemperature -40°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 8-WFDFN Exposed Pad

概述

Description

The LT3494AEDDB#TRPBF is Linear Technology’s high‑voltage, multi‑channel constant‑current LED driver IC. It uses an integrated high‑efficiency switching regulator to drive multiple LED strings from a wide input supply (suitable for automotive and general lighting). Each channel is current‑regulated via an external sense resistor, allowing programmable LED current. The device supports dimming (PWM or analog) and includes protections such as open/short LED, overcurrent, undervoltage, and thermal shutdown. It’s intended for automotive/backlighting, display illumination, and signage applications. The suffix AEDDB#TRPBF indicates the Pb‑free version in a DDB package and tape‑and‑reel packaging. For exact pinout, current‑setting ranges, input limits, and protection behavior, refer to the LT3494 datasheet.

Features

LT3494AEDDB#TRPBF features (concise):
- 1-channel constant-current LED driver with integrated high‑frequency switching regulator
- Wide input voltage range up to 42V
- LED current set by external sense resistor (programmable)
- Dimming: PWM and DC analog dimming options
- Protections: open-LED, short-circuit, overvoltage, UVLO, thermal shutdown
- Cycle-by-cycle current limit; soft-start to minimize inrush and LED stress
- Fixed-frequency operation for predictable EMI behavior
- Enable/shutdown control (EN/DIM)
- Suitable for board- and automotive-grade LED strings; comes in TRPBF tape-and-reel package
Note: exact electrical specs (currents, frequency, dimming ranges) vary by implementation and should be verified in the datasheet.

Package

Package: 8-pin DFN (2×3 mm). The #TRPBF suffix denotes Tape-and-Reel, Pb-free.

Pinout

- Pin count: 16 pins (16-pin package)
- Function: LT3494 is a quad constant-current LED driver with an integrated switching regulator (buck/boost) to drive up to four LED strings, with per-channel current regulation and dimming control.

Manufacturer

Analog Devices, Inc. (ADI). It is a multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits (the former Linear Technology).

Application

Applications for LT3494AEDDB#TRPBF:
- Quad‑channel LED backlighting for LCD panels and signage
- Automotive lighting and indicator applications (dash/spot lighting)
- Portable/industrial devices requiring multiple LED strings
- Architectural and decorative lighting
- General high‑efficiency LED driving with independent channel control

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