LT3496

PRODUCTION

Triple Output LED Driver

Data Sheet Product Selection Table
Part Models
10
1ku List Price
Starting From $4.19
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Part Details

  • 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
LT3496
Triple Output LED Driver
High Dimming Ratio Triple Output LED Power Supply 3000:1 PWM Dimming at 120Hz Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 1

Technical Articles 2

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Temperature Sensors 1
LTC2991
RECOMMENDED FOR NEW DESIGNS Octal I2C Voltage, Current, and Temperature Monitor
Ideal Diode Bridge 1
LT4320
LT4320-1
Ideal Diode Bridge Controller
Power Monitors 1
LT2940
PRODUCTION Power and Current Monitor
TimerBlox 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
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Tools & Simulations

LTspice 4

Models for the following parts are available in LTspice:

  • LT3496
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC1288A

LT3496EUFD Demo Circuit | Buck-Boost or Boost Triple Output LED Driver, 8V ≤ VIN ≤ 16V, VLED up to 36V @ 200mA (×3)

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Product Details

Demonstration circuit 1288 is a Triple Boost or Buck-Boost LED Driver featuring the LT3496EUFD (for evaluating an LT3496 buck mode LED driver, use the demonstration circuit 986). The LT3496 is a triple output DC/DC converter designed to operate as current sources for driving high current LEDs. The board can be configured as either a buck-boost (default) or boost solution. The current for each output is set at 200mA in either mode. The three LEDs are included in the demo board assembly.

The operating power input voltage (PVIN) range is 8V to 16V. The buck-boost circuit can tolerate an input voltage up to 40V when the LED string is on the high side. The part shuts down when the overvoltage threshold is reached. For a typical application with 5 LEDs totaling 16V of LED voltage, the circuit will operate until PVIN reaches 22V if the overvoltage protection is set to 38V.

eval board
schematic 2
DC986A

LT3496EUFD Demo Circuit | Buck-Mode Triple LED Driver, 3V ≤ VIN ≤ 45V, VLED up to 45V (x3)

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Product Details

Demonstration circuit 986 is a Triple Step-Down LED Driver featuring the LT3496EUFD. The LT3496 is a triple output DC/DC converter designed to operate as current sources for driving high current LEDs. Each ofthe three regulators on the demo board is independently operated. The default current for each output channel is 500mA. The output current should not exceed the rated current of the LEDs used.  The maximum voltage of an LED string the demo board can drive is limited by the duty cycle and the input voltage of the LT3496.

The maximum power input voltage (PVIN ) is 45V. As a result, each channel of the demo board can drive up to ~31V total LED voltage. The LT3496's input voltage range is 3V to 30V (with 40V transients), however to minimize power dissipation the demo board uses a 3V to 5.5V supply. 
DC1288A
LT3496EUFD Demo Circuit | Buck-Boost or Boost Triple Output LED Driver, 8V ≤ VIN ≤ 16V, VLED up to 36V @ 200mA (×3)
DC1288A - Schematic
DC986A
LT3496EUFD Demo Circuit | Buck-Mode Triple LED Driver, 3V ≤ VIN ≤ 45V, VLED up to 45V (x3)
DC986A - Schematic

Latest Discussions

3 Years Ago
RE: LT3492, LT3496, & LT3597 Minimum LED Current?
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