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LINEAR TECHNOLOGY  LT3474IFE#PBF  Led Driver, Buck (Step Down), PWM Dimming, 4V-36V in, 500kHz switch, 1A out, TSSOP-16

LINEAR TECHNOLOGY LT3474IFE#PBF
Manufacturer Part No:
LT3474IFE#PBF
Order Code:
2115863
Technical Datasheet:
See all Technical Docs

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Product Overview

The LT3474IFE#PBF is a fixed frequency step-down DC/DC Converter designed to operate as constant-current sources. An internal sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA to 1A, allowing a wide dimming range. Unique PWM circuitry allows a dimming range of 400:1, avoiding the colour shift normally associated with LED current dimming. The high switching frequency offers several advantages, permitting the use of small inductors and ceramic capacitors. The constant switching frequency combined with low-impedance ceramic capacitors result in low, predictable output ripple. With its wide input range of 4 to 36V, the LT3474 regulate a broad array of power sources, from 5V logic rails to unregulated wall transformers, lead acid batteries and distributed power supplies. Frequency fold-back and thermal shutdown provide additional protection.
  • Adjustable control of LED current
  • Integrated boost diode
  • Open LED and short-circuit protection
  • High-side sense allows grounded cathode connection
  • Uses small inductors and ceramic capacitors

Product Information

Voltage Reference Type:
Device Topology:
Buck (Step Down)
No. of Outputs:
1Outputs
Output Current:
1A
Reference Voltage:
Output Voltage:
-
Initial Accuracy:
Temperature Coefficient:
Driver Case Style:
TSSOP
Voltage Reference Case Style:
Input Voltage Min:
4V
No. of Pins:
16Pins
Input Voltage Max:
36V
Switching Frequency:
2MHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Each
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Automotive
  • Avionics
  • LED Lighting

Legislation and Environmental

Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.000104

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