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LT3755EMSE-2#PBF

Led Driver, Boost/Buck, Flyback, SEPIC, PWM Dimming, 4.5V-40V in, 1MHz switch, 75V/1A out, MSOP-16

LT3755EMSE-2#PBF - Led Driver, Boost/Buck, Flyback, SEPIC, PWM Dimming, 4.5V-40V in, 1MHz switch, 75V/1A out, MSOP-16

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Manufacturer Part No:
LT3755EMSE-2#PBF
Order Code:
2294856
Technical Datasheet:
LT3755EMSE-2#PBF   Datasheet
See all Technical Docs

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:
Boost, Buck, Buck-Boost, Flyback, SEPIC

:
4.5V

:
40V

:
75V

:
1A

:
1MHz

:
1Outputs

:
SMD

:
MSOP

:
16Pins

:
-40°C

:
125°C

:
-

:
-

:
MSL 1 - Unlimited
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Technical Docs (3)

Product Overview

The LT3755EMSE-2#PBF is a LED 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 LT3755-2 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.
  • 3000:1 True colour PWM™ dimming
  • Constant-current and constant-voltage regulation
  • 100mV High-side current sense
  • Drives LEDs in boost, buck mode, buck-boost mode, SEPIC or Flyback topology
  • 100kHz to 1MHz Adjustable frequency
  • Open LED protection
  • Programmable under-voltage lockout with hysteresis
  • Improved open LED status pin
  • PWM disconnect switch driver
  • CTRL pin provides analogue dimming
  • Low shutdown current (<1µA)
  • Programmable soft-start

Applications

LED Lighting, Power Management

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