Datasheet Linear Technology LT3761HMSE#PBF — Datenblatt

Hersteller	Linear Technology
Serie	LT3761
Artikelnummer	LT3761HMSE#PBF

60VIN LED Controller mit internem PWM Generator

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PDF, 593 Kb, Sprache: en, Datei hochgeladen: Oct 2, 2017, Seiten: 32
60VIN LED Controller with Internal PWM Generator

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Andere Optionen

LT3761-1 LT3761-1

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Accurate PWM LED Dimming without External Signal Generators, Clocks or µControllers &mdash LT Journal
PDF, 2.3 Mb, Datei veröffentlicht: Oct 18, 2012
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Accurate PWM LED Dimming without External Signal
Generators, Clocks or ВµControllers
Keith Szolusha LEDs can be dimmed in two ways: analog and pulse-width modulation (PWM) dimming.
Analog dimming changes LED light output by simply adjusting the DC current in the string,
while PWM dimming acheives the same effect by varying the duty cycle of a constant
current in the string to effectively change the average current in the string. Despite its
attractive simplicity, analog dimming is inappropriate for many applications because it
loses dimming accuracy by about 25%+ at only 10:1 brightness levels, and it skews the
color of the LEDs. In contrast, PWM dimming can produce 3000:1 and higher dimming
ratios (at 100Hz) without any significant loss of accuracy, and no change in LED color.
The LT3761 combines the simplicity of
analog dimming with the accuracy of
PWM dimming by generating its own
PWM signal. High dimming ratios are
possible by adjusting a simple DC signal
at its dimming inputвЂ”no additional
PWM-generating microcontrollers, oscillators or signal generators are required.
The LT3761вЂ™s internal PWM signal
can produce 25:1 dimming, while it
can still deliver up to 3000:1 dimming with an external PWM signal.
HIGH POWER LED DRIVER The LT3761 is a high power LED driver
similar to the LT3755-2 and LT3756-2
family. It is a 4.5V-to-60V input to …

Modellreihe

Serie: LT3761 (6)

LT3761EMSE#PBF LT3761EMSE#TRPBF LT3761HMSE#PBF LT3761HMSE#TRPBF LT3761IMSE#PBF LT3761IMSE#TRPBF

Herstellerklassifikation

Power Management > Battery Management > Battery Charger IC > Switching Battery Chargers
Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers | Step-Down (Buck) LED Drivers | Buck-Boost LED Drivers | Multitopology LED Driver
Power Management > Supercapacitor Chargers
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) LED Drivers

Andere Namen:

LT3761HMSEPBF, LT3761HMSE PBF