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LINEAR TECHNOLOGY  LT3955EUHE#PBF  Led Driver, 1 Output, Boost, Buck, Flyback, SEPIC, 4.5V-60V in, 1MHz switch, QFN-36

LINEAR TECHNOLOGY LT3955EUHE#PBF
Manufacturer Part No:
LT3955EUHE#PBF
Order Code:
2461068
Technical Datasheet:
See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

Product Overview

The LT3955EUHE#PBF is a DC/DC Converter designed to operate as a constant-current source and constant-voltage regulator. It features an internal low-side N-channel MOSFET rated for 80V/3.5A. The LT3955 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and super-capacitors. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A voltage feedback pin serves as the input for several LED protection features and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size. The PWM input can be configured to self-oscillate at fixed frequency with duty ratio programmable from 4 to 96%. When driven by an external signal, the PWM input provides LED dimming ratios of up to 3000:1.
  • Programmable PWM dimming signal generator
  • Constant current (±3%) and constant-voltage (±2%) regulation
  • Accurate analogue dimming
  • Output short-circuit protected boost
  • Open LED protection and reporting
  • Programmable VIN UVLO with hysteresis
  • C/10 Indication for battery chargers
  • 0 to 80V Rail-to-rail current sense range

Product Information

Device Topology:
Boost, Buck, Buck-Boost, Flyback, SEPIC
No. of Outputs:
1Outputs
Output Current:
-
Output Voltage:
-
Driver Case Style:
QFN
No. of Pins:
36Pins
Input Voltage Min:
4.5V
Input Voltage Max:
60V
Switching Frequency:
1MHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Cut Tape
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • LED Lighting
  • Consumer Electronics

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):
.000074

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