Datasheet > LM3492MH

LM3492MH

更新时间： 2024-09-19 01:19:59

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德州仪器 - TI		/
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描述
Two-Channel Individual Dimmable LED Driver with Boost Converter and Fast Current Regulator

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LM3492MH 数据手册

LM3492, LM3492Q

www.ti.com

SNVS656C –SEPTEMBER 2010–REVISED MAY 2013

Two-Channel Individual Dimmable LED Driver with Boost Converter and Fast Current

Regulator

Check for Samples: LM3492, LM3492Q

FEATURES

•

Boost Converter:

–

COMM I/O pin for diagnostic and

commands

–

LM3492Q is an Automotive Grade Product

that is AEC Q100 Grade 1 Qualified

–

Thermal shutdown protection

Very Wide Input Voltage Ranged from 4.5V-

65V

Thermally enhanced 20-Pin HTSSOP

package

–

Programmable Soft-start

APPLICATIONS

No Loop Compensation Required

•

Ultra-high contrast ratio 6.5”-10” LCD display

backlight up to 28 LEDs

Stable with Ceramic and Other low ESR

Capacitors with no Audible Noise

•

Automotive or marine GPS display

–

Nearly Constant Switching Frequency

Programmable from 200 kHz to 1 MHz

DESCRIPTION

•

Current Regulators:

The LM3492 integrates a boost converter and a two-

channel current regulator to implement a high efficient

and cost effective LED driver for driving two

individually dimmable LED strings with a maximum

power of 15W and an output voltage of up to 65V.

The boost converter employs a proprietary Projected-

On-Time control method to give a fast transient

response with no compensation required, and a

nearly constant switching frequency programmable

from 200 kHz to 1 MHz. The application circuit is

stable with ceramic capacitors and produces no

audible noise on dimming. The programmable peak

current limit and soft-start features reduce current

surges at startup, and an integrated 190 mΩ, 3.9A N-

Channel MOSFET switch minimizes the solution size.

–

Programmable LED Current from 50 mA to

200 mA

–

1000:1 Contrast Ratio at a Dimming

Frequency of more than 3 kHz, Minimum

LED Current Pulse width is 300 ns

–

Two Individual Dimmable LED strings up to

65V, total 15W (typically 28 LEDs at 150

mA)

Dynamic Headroom Control maximizes

efficiency

–

Over-Power protection

±3% current accuracy

•

Supervisory Functions:

Precision enable

–

TYPICAL APPLICATION

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...24

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与LM3492MH相关器件

型号	品牌	获取价格	描述	数据表
LM3492MH/NOPB	TI	获取价格	具有升压转换器和快速电流调节器的 2 通道独立可调光 LED 驱动器 \| PWP \| 20
LM3492MHX/NOPB	TI	获取价格	具有升压转换器和快速电流调节器的 2 通道独立可调光 LED 驱动器 \| PWP \| 20
LM3492Q	TI	获取价格	Two-Channel Individual Dimmable LED Driver with Boost Converter and Fast Current Regulator
LM3492-Q1	TI	获取价格	具有升压转换器和快速电流调节器的汽车类 2 通道独立可调光 LED 驱动器
LM3492QMH/NOPB	TI	获取价格	具有升压转换器和快速电流调节器的汽车类 2 通道独立可调光 LED 驱动器 \| PWP \|
LM3492QMHX/NOPB	TI	获取价格	具有升压转换器和快速电流调节器的汽车类 2 通道独立可调光 LED 驱动器 \| PWP \|
LM34930	NSC	获取价格	Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim
LM34930	TI	获取价格	1A Constant On-Time Buck Switching Regulator with Intelligent Current
LM34930TL	NSC	获取价格	Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim
LM34930TL/NOPB	TI	获取价格	Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim

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