Datasheet Linear Technology LT3795HFE#PBF — 数据表

制造商	Linear Technology
系列	LT3795
零件号	LT3795HFE#PBF

具有扩频频率调制的110V LED控制器

数据表

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PDF, 848 Kb, 语言: en, 文件上传: Oct 4, 2017, 页数: 30
110V LED Controller with Spread Spectrum Frequency Modulation

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价格

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Package	TSSOP-28
Package Code	FE
Package Index	05-08-1663 (EA)

参数化

Architecture	Constant Frequency Current Mode
Demo Boards	DC1827A
Design Tools	LTspice File
Dimming	3000:1 PWM
Export Control	no
Features	True Color PWM Dimming, Spread Spectrum, Resistor Set Frequency, Open LED Protection, C/10 Battery Termination
Frequency	1000 kHz
Ishutdown	10 µA
Isupply	2.9 mA
Max Number of LEDs	25+
Monolithic	no
Number of Outputs	1
Operating Temperature Range	-40 to 125 °C
Output Current	10 A
Switch Current	25 A
Synchronous	no
Topology	Buck, Boost, Buck-Boost, Sepic, LED Driver
Vin Max	110 V
Vin Min	4.5 V
Vout Max	110 V

生态计划

RoHS

Compliant

文章

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LED Driver with Integrated Spread Spectrum Reduces EMI without Adding Flicker (LT3795) &mdash LT Journal
PDF, 3.2 Mb, 档案已发布: Oct 9, 2013
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LED Driver with Integrated Spread Spectrum
Reduces EMI without Adding Flicker
Keith Szolusha Automotive LED drivers should be compact, efficient and support flicker-free PWM
dimming. They should not produce significant conducted EMI at and around the AM
radio band. Unfortunately, low EMI is not in the nature of high power switch mode power
suppliesвЂ”the constant switching frequency produces a significant EMI signature at a
number of frequencies, including the power supplyвЂ™s fundamental operating frequency
and its harmonics. Odds are good that something will fall into the AM band.
One way to minimize EMI peaks is to
allow the switch mode power supply
(SMPS) operating frequency to cover a
range of values, namely spread spectrum
switching. The desired effect of spread
spectrum switching is to push down VIN
8V TO 60V
100V TRANSIENT L2
4.7ВµH
2.2ВµF
100V OPTIONAL
EMI FILTER the EMI peaks that would occur at the
SMPS fundamental operating frequency
and harmonics, spreading the EMI energy
over a range of frequencies instead. RINSNS …
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One LED Driver Is All You Need for Automotive LED Headlight Clusters (LT3795) &mdash LT Journal
PDF, 762 Kb, 档案已发布: Jul 7, 2015
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design features One LED Driver Is All You Need for Automotive LED Headlight
Clusters
Keith Szolusha and Kyle Lawrence Low beam headlights, high beam headlights, daytime running lights and signal lights are
often fashioned together in a single unit or cluster, allowing designers to produce distinctive
automotive front end looks. LED lighting has found its way into these clusters, distinguishing
the high end faces of todayвЂ™s luxury vehicles; but LEDs offer more than just good looks.
They have a number of technical advantages over competing lighting technologiesвЂ”notably
improved efficiency, robustness and lifetime. Despite these advantages, automobile
lighting designers are challenged by the cost of replacing traditional lamps with LEDs.
A significant portion of the cost LED
lighting is driven by the costs of the
LEDs themselves, thermal management
assemblies (such as finned metal heat
sinks) and robust LED driver circuits.
Traditionally, each LED beam or light
type would require its own LED driver
PCB. Costs and complexity can be significantly reduced if a single driver is used to drive multiple LED strings (in
series) within the lighting cluster.
A comprehensive, multi-LED-string driver
must support the high voltages and high
currents required by high power LED
strings. It must also deftly handle the
on/off transitions of some LED strings …

模型线

系列: LT3795 (6)

LT3795EFE#PBF LT3795EFE#TRPBF LT3795HFE#PBF LT3795HFE#TRPBF LT3795IFE#PBF LT3795IFE#TRPBF

制造商分类

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

其他名称:

LT3795HFEPBF, LT3795HFE PBF