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LINEAR TECHNOLOGY  LT3475EFE-1#PBF  Led Driver, 2 Outputs, Buck (Step Down), PWM Dimming, 4V-36V in, 600kHz switch, 1.5A out, TSSOP-20

LINEAR TECHNOLOGY LT3475EFE-1#PBF
Manufacturer Part No:
LT3475EFE-1#PBF
Order Code:
2294842
Technical Datasheet:
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Product Overview

The LT3475EFE-1#PBF is a dual step-down DC/DC Converter designed to operate as a constant-current source. An internal sense resistor monitors the output current allowing accurate current regulation ideal for driving high current LEDs. The high-side current sense allows grounded cathode LED operation. High output current accuracy is maintained over a wide current range, from 50mA to 1.5A, allowing a wide dimming range. Unique PWM circuitry allows a dimming range of 3000:1, 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 LT3475 regulates a broad array of power sources. Current mode PWM architecture provides fast transient response and cycle-by-cycle current limiting.
  • High-side current sense allows grounded cathode LED operation
  • Open LED and short-circuit protection
  • Anti-phase switching reduces ripple
  • Uses small inductors and ceramic capacitors

Product Information

Voltage Reference Type:
Device Topology:
Buck (Step Down)
No. of Outputs:
2Outputs
Output Current:
1.5A
Reference Voltage:
Output Voltage:
-
Initial Accuracy:
Temperature Coefficient:
Driver Case Style:
TSSOP
Voltage Reference Case Style:
Input Voltage Min:
4V
No. of Pins:
20Pins
Input Voltage Max:
36V
Switching Frequency:
600kHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°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):
.00027

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