- 您现在的位置：买卖IC网 > PDF目录22060 > A6261ELPTR-T (Allegro Microsystems Inc)IC LED ARRAY DVR 400MA 16-TSSOP PDF资料下载
参数资料
| 型号： | A6261ELPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 13/19页 |
| 文件大小： | 0K |
| 描述： | IC LED ARRAY DVR 400MA 16-TSSOP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 电源电压： | 6 V ~ 50 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 620-1358-6 |
A6261
2.3 V. The graph shows the temperature as the supply voltage
increases from 14 V to 17 V. Without the thermal foldback fea-
ture the temperature would continue to increase up to the thermal
shutdown temperature as shown by the dashed line. The solid line
shows the effect of the thermal foldback function in limiting the
temperature rise.
Figures 6 and 7 show the thermal effects where the thermal
resistance from the silicon to the ambient temperature is 40°C/W.
Thermal performance can be enhanced further by using a signifi-
cant amount of thermal vias as described below.
Thermal Dissipation
The amount of heat that can pass from the silicon of the A6261
to the surrounding ambient environment depends on the thermal
resistance of the structures connected to the A6261. The thermal
resistance, R θ JA , is a measure of the temperature rise created by
the power dissipated and is usually measured in degrees Celsius
per watt (°C/W).
The temperature rise, Δ T, is calculated from the power dissipated,
P D , and the thermal resistance, R θ JA , as:
Protected LED Array Driver
Δ T = P D × R θ JA
(10)
A thermal resistance from silicon to ambient, R θ JA , of approxi-
mately 30°C/W (LP package) or 34°C/W (LY package) can be
achieved by mounting the A6261 on a standard FR4 double-sided
printed circuit board (PCB) with a copper area of a few square
inches on each side of the board under the A6261. Multiple
thermal vias, as shown in figure 8, help to conduct the heat from
the exposed pad of the A6261 to the copper on each side of the
board. The thermal resistance can be reduced by using a metal
substrate or by adding a heatsink.
Supply Voltage Limits
In some applications the available supply voltage can vary over
a two-to-one range; for example, emergency lighting systems
using battery backup. In such systems is it necessary to design
the application circuit such that the system meets the required
performance targets over a specified voltage range.
To determine this range when using the A6261 there are two
limiting conditions:
? For maximum supply voltage the limiting factor is the power
that can be dissipated from the regulator without exceeding the
temperature at which the thermal foldback starts to reduce the
output current below an acceptable level.
Figure 8. Board via layout for thermal dissipation: (top) LJ package,
(middle) LP package, (bottom) LY package.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
13
相关PDF资料 |
PDF描述 |
|---|---|
| 174225-4 | CONN D-CAP MALE PINS 50POS R/A |
| RMM36DRYN | CONN EDGECARD 72POS DIP .156 SLD |
| GLC50-24G | PS SWITCHER 50W 24V 2.1A |
| A6280EESTR-T | IC LED DRIVER PWM CONTROL 16-QFN |
| RCB108DHRR | CONN CARD EXTEND 216POS .050" |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A6261KLJTR-T | 功能描述:AUTOMOTIVE LINEAR, PROGRAMMABLE 制造商:allegro microsystems, llc 系列:* 零件状态:在售 标准包装:3,000 |
| A6261KLJTR-T-1 | 功能描述:AUTOMOTIVE LINEAR, PROGRAMMABLE 制造商:allegro microsystems, llc 系列:* 零件状态:在售 标准包装:3,000 |
| A6261KLPTR-T | 功能描述:IC LED ARRAY DVR 400MA 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| A6261KLYTR-T | 功能描述:IC LED ARRAY DVR 400MA 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| A6262 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A6262 is a linear, programmable current regulator providing up to 100 mA from each of four outputs to drive arrays of high brightness LEDs. |
发布紧急采购，3分钟左右您将得到回复。