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ADI LT3476IUHF#TRPBF product image
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ADI LT3476IUHF#TRPBF

Manufacturer
ADI
MPN
LT3476IUHF#TRPBF
LCSC Part #
C670647
Packaging
QFN-38-EP(5x7)
Customer #
Key Attributes
200kHz~2MHz PWM 4 DC-DC 2.2V~33.5V 1.5mA 2.8V~16V QFN-38-EP(5x7) LED Drivers RoHS
DatasheetADI LT3476IUHF#TRPBF
RoHS Compliance1 documents available
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement
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QtyUnit Price(Reference Only)Total Amount
1+$ 9.744$ 9.74
200+$ 3.7707$ 754.14
500+$ 3.6396$ 1819.80
1,000+$ 3.5732$ 3573.20
Standard Packaging2500/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/LED Drivers
ManufacturerADI
PackagingQFN-38-EP(5x7)
Frequency - Switching200kHz~2MHz
DimmingPWM
Voltage - Input(AC)-
Number of Channels4
TypeDC-DC
Switch tube (built-in/external)-
Output Voltage2.2V~33.5V
Operating Temperature-40℃~+125℃
Output Current1.5mA
FeaturesOver Voltage Protection;LED open-circuit protection;Over-Temperature Protection (OTP)
TopologyBuck-Boost
Voltage - Input(DC)2.8V~16V
Constant Current Accuracy2.5%
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Introduction

AI Translation

The LT3476 is a quad output DC/DC converter designed to operate as a constant-current source for driving high current LEDs. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 200kHz and 2MHz to optimize efficiency and external component size. The LT3476 senses output current at the high side of the LED. High side current sensing is the most flexible scheme for driving LEDs, allowing buck, boost or buckboost configurations. Each current monitor threshold is trimmed to within 2.5% at the full scale of 105mV. With an external sense resistor, the user programs the output current range of each channel. Each of the four regulators is independently operated by that channel’s PWM signal. This PWM feature allows precise adjustment of the color mixing or dimming ratio of the LED source. Dimming ratios up to 1000:1 can be achieved.

Features

AI Translation
  • True Color PWMTM Dimming Delivers Up to 5000:1 Dimming Ratio (In Boost Configuration)
  • LED Current Regulation with High-Side Sense
  • VADJ Pin Accurately Sets LED Current Sense Threshold Over Range 10mV to 120mV
  • Four Independent Driver Channels with 1.5A, 36V Internal NPN Switches
  • Frequency Adjust Pin: 200kHz to 2MHz
  • High Efficiency Conversion = Up to 96%
  • Open LED Protection
  • Low Shutdown Current <10μA
  • Wide VIN Range: 2.8 to 16V
  • Thermally Enhanced, 38-Lead, 5mm×7mm QFN Package

Applications

AI Translation
  • RGGB Lighting
  • Automotive Lighting
  • TFT LCD Backlighting
  • Constant-Current Sources