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LT3496

Features: · True Color PWM™ Dimming Delivers Up to 3000:1Dimming 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 Ran...

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SeekIC No. : 004401106 Detail

LT3496: Features: · True Color PWM™ Dimming Delivers Up to 3000:1Dimming Ratio· Built-In Gate Driver for PMOS LED Disconnect· Three Independent Driver Channels with 750mA,45V Internal Switches· Operat...

LT3496 Data Sheet

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Part Number:
LT3496
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· True Color PWM™ Dimming Delivers Up to 3000:1Dimming 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 Input Voltage Range:Operation  from 3V to 30V Transient Protection to 40V
· Surface Mount Components
· 28-Lead (4mm × 5mm) QFn  and TSSOP Packages


Application

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


Pinout

Connection Diagram


Specifications

VIN (Note 4) ...............................................................40V
SW1-SW3, LED1-LED3, CAP1-CAP3 ........................45V
TG1-TG3 .......................................... CAP 10V to CAP
PWM1-PWM3 ...........................................................20V
VREF, CTRL1-CTRL3, FADJ, VC1-VC3, OVP1-OVP3 .2.5V
SHDN (Note 4) ..........................................................VIN
Operating Junction Temperature Range
(Note 2) .................................................. 40 to 125
Max Junction Temperature .................................... 125
Storage Temperature Range ................... 65 to 150


Description

The LT®3496 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 buckboost mode. The LT3496 uses a fi xed 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 effi ciency 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 pin is used to adjust the LED current either for analog dimming or overtemperature protection.




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