LT3496 - Triple Output LED Driver

Features

  • True Color PWM™ Dimming Delivers Up to 3000:1 Dimming Ratio
  • Built-In Gate Driver for PMOS LED Disconnect
  • Three Independent Driver Channels with 750mA, 45V Internal Switches
  • Operates in Buck, Boost, Buck-Boost Modes
  • CTRL Pin Accurately Sets LED Current Sense Threshold Over a Range of 10mV to 100mV
  • Adjustable Frequency: 330kHz to 2.1MHz
  • Open LED Protection
  • Wide VIN Supply Range: Operation from 3V to 30V, Transient Protection to 40V
  • Surface Mount Components
  • 28-Lead (4mm × 5mm) QFN and TSSOP Packages

Typical Application

LT3496 Typical Application
LT3496 Typical Application

Description

The LT3496 is a triple output DC/DC converter designed to operate as a constant-current source and is ideal for driving LEDs. The LT3496 works in buck, boost or buck boost mode. The LT3496 uses a fixed frequency, current mode architecture resulting in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 330kHz and 2.1MHz to optimize efficiency and external component size.

The LT3496 supports 3000:1 dimming control on each channel. Each of the three regulators is independently operated by that channel’s PWM signal. The PWM feature allows precise adjustment of the color mixing or dimming ratio of the LED source. Each of the three channels has a built-in gate driver to drive an external LED-disconnect P-channel MOSFET, allowing high dimming range. The output current range of each channel of the LT3496 is programmed with an external sense resistor.

The CTRL pins are used to adjust the LED currents either for analog dimming or overtemperature protection.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

QFN-28, TSSOP-16

LT3496 Package Drawing
LT3496 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3496EFE#PBF TSSOP 28 E $5.22 $3.65 View
LT3496EFE#TRPBF TSSOP 28 E $3.71 View
LT3496EUFD#PBF QFN 28 E $5.00 $3.50 View
LT3496EUFD#TRPBF QFN 28 E $3.56 View
LT3496HUFD#PBF QFN 28 H $6.36 $4.45 View
LT3496HUFD#TRPBF QFN 28 H $4.51 View
LT3496IFE#PBF TSSOP 28 I $6.22 $4.35 View
LT3496IFE#TRPBF TSSOP 28 I $4.41 View
LT3496IUFD#PBF QFN 28 I $6.00 $4.20 View
LT3496IUFD#TRPBF QFN 28 I $4.26 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1288A LT3496EUFD Demo Circuit |Boost or Buck-Boost mode Triple Output LED Driver @ 200mA/channel. $100.00
DC986A LT3496EUFD Demo Circuit | Buck-mode Triple LED Driver @ 500mA/channel. $125.00
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Click here to view our complete list of demo boards

Applications

  • RGB Lighting
  • Billboards and Large Displays
  • Automotive and Avionic Lighting
  • Constant-Current Sources

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Design Tools

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LT3496

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