Datasheet Linear Technology LT3761-1 — Ficha de datos

Fabricante	Linear Technology
Serie	LT3761-1

Controlador LED 60VIN con generador interno PWM

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PDF, 593 Kb, Idioma: en, Archivo subido: oct 2, 2017, Páginas: 32
60VIN LED Controller with Internal PWM Generator

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Embalaje

	LT3761EMSE-1#PBF	LT3761EMSE-1#TRPBF	LT3761IMSE-1#PBF	LT3761IMSE-1#TRPBF
N	1	2	3	4
Package	MS-16E Dibujo del esquema del paquete	MS-16E Dibujo del esquema del paquete	MS-16E Dibujo del esquema del paquete	MS-16E Dibujo del esquema del paquete
Package Code	MSE	MSE	MSE	MSE
Package Index	05-08-1667	05-08-1667	05-08-1667	05-08-1667
Pin Count	16	16	16	16

Paramétricos

Parameters / Models	LT3761EMSE-1#PBF	LT3761EMSE-1#TRPBF	LT3761IMSE-1#PBF	LT3761IMSE-1#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1772A	DC1772A	DC1772A	DC1772A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Dimming	3000:1 PWM	3000:1 PWM	3000:1 PWM	3000:1 PWM
Export Control	no	no	no	no
Features	Resistor Set Switching Frequency, Rail-to-Rail Current Sense, Open LED Protection	Resistor Set Switching Frequency, Rail-to-Rail Current Sense, Open LED Protection	Resistor Set Switching Frequency, Rail-to-Rail Current Sense, Open LED Protection	Resistor Set Switching Frequency, Rail-to-Rail Current Sense, Open LED Protection
Frequency, kHz	1000	1000	1000	1000
Ishutdown, µA	0.1	0.1	0.1	0.1
Isupply, mA	1.8	1.8	1.8	1.8
Max Number of LEDs	25+	25+	25+	25+
Monolithic	no	no	no	no
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	10	10	10	10
Switch Current, A	25	25	25	25
Synchronous	no	no	no	no
Topology	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver
Vin Max, V	60	60	60	60
Vin Min, V	4.5	4.5	4.5	4.5
Vout Max, V	100	100	100	100

Plan ecológico

	LT3761EMSE-1#PBF	LT3761EMSE-1#TRPBF	LT3761IMSE-1#PBF	LT3761IMSE-1#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente

Otras opciones

LT3761 LT3761

Artículos

Descargar
Accurate PWM LED Dimming without External Signal Generators, Clocks or µControllers &mdash LT Journal
PDF, 2.3 Mb, Archivo publicado: oct 18, 2012
Extracto del documento
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 …

Linea modelo

Serie: LT3761-1 (4)

LT3761EMSE-1#PBF LT3761EMSE-1#TRPBF LT3761IMSE-1#PBF LT3761IMSE-1#TRPBF

Clasificación del fabricante

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