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LM3492HCQMHX PDF预览

LM3492HCQMHX

更新时间： 2024-09-18 12:09:47
品牌 Logo 应用领域
德州仪器 - TI 驱动器转换器稳压器升压转换器
页数 文件大小 规格书
17页 317K
描述
Two-Channel Individual Dimmable LED Driver with Boost Converter and Fast Current Regulator

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中文翻译

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LM3492HCQMHX 技术参数

生命周期：Obsolete包装说明：HTSSOP,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.68
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：R-PDSO-G20
长度：6.5 mm功能数量：1
区段数：6端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
筛选级别：AEC-Q100座面最大高度：1.1 mm
最大供电电压：65 V最小供电电压：4.5 V
标称供电电压：12 V表面贴装：YES
温度等级：AUTOMOTIVE端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
宽度：4.4 mmBase Number Matches：1

LM3492HCQMHX 数据手册

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March 28, 2012  
LM3492HC/LM3492HCQ  
Two-Channel Individual Dimmable LED Driver with Boost  
Converter and Fast Current Regulator  
General Description  
Features  
The LM3492HC integrates a boost converter and a two-chan-  
nel 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 Pro-  
jected-On-Time control method to give a fast transient re-  
sponse 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. The fast slew  
rate current regulator allows high frequency and narrow pulse  
width dimming signals to achieve a very high contrast ratio of  
10000:1. The LED current is programmable from 50 mA to  
250 mA by a single resistor.  
Boost Converter:  
LM3492HCQ is an Automotive Grade Product that is AEC  
Q100 grade 1 qualified  
■
Very wide input voltage ranged from 4.5V-65V  
■
■
■
■
Programmable soft-start  
No loop compensation required  
Stable with ceramic and other low ESR capacitors with no  
audible noise  
Nearly constant switching frequency programmable from  
200 kHz to 1 MHz  
■
Current Regulators:  
Programmable LED current from 50 mA to 250 mA  
■
■
■
10000:1 contrast ratio, 300 ns minimum pulse width  
Two individual dimmable LED strings up to 65V, total 15W  
(typically 28 LEDs @ 150 mA)  
To maximize the efficiency, Dynamic Headroom Control  
(DHC) automatically adjusts the output voltage to a minimum.  
DHC also facilitates a single BOM for different number of LED  
in a string, which is required for backlight panels of different  
size, thereby reducing overall development time and cost.  
The LM3492HC comes with a versatile COMM pin which  
serves as a bi-directional I/O pin interfacing with an external  
MCU for the following functions: power-good, over-tempera-  
ture, IOUT over- and under-voltage indications, switching  
frequency tuning, and channel 1 disabling. Other supervisory  
functions of the LM3492HC include precise enable, VCC un-  
der-voltage lock-out, current regulator over-power protection,  
and thermal shutdown protection. The LM3492HC is avail-  
able in the thermally enhanced eTSSOP-20 package.  
Dynamic Headroom Control maximizes efficiency  
■
■
■
Over-Power protection  
±3% current accuracy  
Supervisory Functions:  
Precision enable  
■
■
■
■
COMM I/O pin for diagnostic and commands  
Thermal shutdown protection  
Thermally enhanced eTSSOP-20 package  
Applications  
Ultra-high contrast ratio 6.5”-10” LCD display backlight up  
to 28 LEDs  
■
Automotive or marine GPS display  
■
© 2012 Texas Instruments Incorporated  
301705 SNVS797  
www.ti.com  
1234567...17

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 		具有升压转换器和电流调节器的汽车类高对比度 2 通道可调光 LED 驱动器 | PWP |
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LM3492MH/NOPB TI

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 		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

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 		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

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 		Two-Channel Individual Dimmable LED Driver with Boost Converter and Fast Current Regulator
LM3492-Q1 TI

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 		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

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 		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

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 		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

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 		Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim
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