Datasheet Texas Instruments LM36274 — 数据表
| 制造商 | Texas Instruments |
| 系列 | LM36274 |
带有LCD偏置的集成背光驱动器
数据表
Four-Channel LCD Backlight Driver With Integrated Bias Power datasheet
PDF, 5.5 Mb, 修订版: C, 档案已发布: Jun 23, 2017
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价格
状态
| LM36274YFFR | |
|---|---|
| Lifecycle Status | Active (Recommended for new designs) |
| Manufacture's Sample Availability | Yes |
打包
| LM36274YFFR | |
|---|---|
| N | 1 |
| Pin | 24 |
| Package Type | YFF |
| Industry STD Term | DSBGA |
| JEDEC Code | S-XBGA-N |
| Package QTY | 3000 |
| Carrier | LARGE T&R |
| Device Marking | LM36274 |
| Thickness (mm) | .3 |
| Pitch (mm) | .4 |
| Max Height (mm) | .625 |
| Mechanical Data | 下载 |
参数化
| Parameters / Models | LM36274YFFR |
|---|---|
| Number of Channels | 4 |
| Duty Cycle(Max), % | 92 |
| LED | 32 |
| LED Current Per Channel, mA | 30 |
| Operating Temperature Range, C | -40 to 85 |
| Package Group | DSBGA |
| Package Size: mm2:W x L, PKG | See datasheet (DSBGA) |
| Peak Efficiency, % | 92 |
| Rating | Catalog |
| Shutdown Current(Typ), uA | 1.2 |
| Special Features | Adjustable Switch Frequency,CABC,I2C Control,OVP,Thermal Shutdown |
| Switching Frequency(Max), kHz | 1050 |
| Topology | Boost,Current Sink |
| Type | Inductive |
| Vin(Max), V | 5 |
| Vin(Min), V | 2.7 |
| Vout(Max), V | 30 |
| Vout(Min), V | 27 |
生态计划
| LM36274YFFR | |
|---|---|
| RoHS | Compliant |
应用须知
- Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED BacklightPDF, 252 Kb, 档案已发布: Oct 14, 2016
As the load current of a boost converter is reduced, the ratio of conduction losses to switching lossesbegins to lower. Conduction losses are losses that are a function of current. Switching losses are lossesthat are a function of switching frequency. As this ratio is reduced the boost switching losses begin todominate the total circuit losses. When this happens, the benefit of lowering the - Analog PWM Dimming in White-LED DriversPDF, 539 Kb, 档案已发布: Dec 21, 2016
Pulse-width modulation (PWM) is a common type of dimming used to adjust the current in white-LEDdriver devices. PWM dimming takes a rectangle waveform with variable positive duty cycle (D) and adjuststhe LED current proportionally. For many smaller format white LED drivers (7-inch screen size or smaller),the PWM signal is converted to a DC control voltage and made to drive the LED current in - Schottky Diode Selection in Asynchronous Boost ConvertersPDF, 491 Kb, 档案已发布: Sep 6, 2016
Asynchronous boost converters require a Schottky diode as the rectifying element due to the diode's lowforward voltage and fast turn-on time. Because of these characteristics asynchronous boost converterscan have as good as, or better efficiency, than synchronous boost converters. This is especially true whenthe boost conversion ratios (VOUT/VIN) are high, and the Schottky diode conduction t - Inductor Selection in Boost Converters for LCD Backlight ApplicationsPDF, 764 Kb, 档案已发布: Oct 24, 2016
White LED drivers for LCD back-light applications are often designed for battery-powered devices. This makes circuit size and efficiency crucial. Because of this, selecting the optimal inductor is one of the mostimportant aspects of the design. This application note discusses the important parameters of the inductorand how to select the right inductor for the application.
模型线
系列: LM36274 (1)
制造商分类
- Semiconductors> Power Management> LED Driver> Backlight