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LINEAR TECHNOLOGY  LT3755EUD#PBF  Led Driver, Boost/Buck, Flyback, SEPIC, PWM Dimming, 4.5V-40V in, 1MHz switch, 75V/1A out, QFN-16

LINEAR TECHNOLOGY LT3755EUD#PBF
Technical Data Sheet (350.41KB) EN See all Technical Docs

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

Product Overview

The LT3755EUD#PBF is a DC/DC Controller designed to operate as a constant-current source for driving high current LEDs. It drives a low-side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB 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 controller sense output current at the high-side of the LED string. High-side current sensing is the most flexible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode configuration. The PWM input provides LED dimming ratios of up to 3000:1 and the CTRL input provides additional analogue dimming capability.
  • Constant-current and constant-voltage regulation
  • Open LED protection
  • Programmable under-voltage lockout with hysteresis
  • PWM disconnect switch driver
  • CTRL pin provides analogue dimming
  • Low shutdown current - <1µA
  • Programmable soft-start
  • 100mV High-side current sense

 

Product Information

Device Topology:
Boost, Buck, Buck-Boost, Flyback, SEPIC
No. of Outputs:
1Outputs
Output Current:
1A
Output Voltage:
75V
Driver Case Style:
QFN
No. of Pins:
16Pins
Input Voltage Min:
4.5V
Input Voltage Max:
40V
Switching Frequency:
1MHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Each
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited

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Applications

  • LED Lighting;
  • Power Management

Legislation and Environmental

Moisture Sensitivity Level:
MSL 1 - Unlimited
Country of Origin:
Malaysia

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.0002