参数资料
| 型号： | A4447SLJTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 8SOIC |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 24 V |
| 输入电压： | 8 V ~ 50 V |
| PWM 型： | 电流模式 |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-SOIC-EP |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1329-6 |
A4447
High Voltage Step Down Regulator
Optimizing Thermal Layout
The features of the printed circuit board, including heat conduc-
tion and adjacent thermal sources such as other components,
have a very significant effect on the thermal performance of the
device. To optimize thermal performance, the following should
be taken into account:
? The device exposed thermal pad should be connected to as
much copper area as is available.
? Copper thickness should be as high as possible (for example,
2 oz. or greater for higher power applications).
? The greater the quantity of thermal vias, the better the dissipa-
tion. If the expense of vias is a concern, studies have shown
that concentrating the vias directly under the device in a tight
pattern, as shown in figure 6, has the greatest effect.
? Additional exposed copper area on the opposite side of the
board should be connected by means of the thermal vias. The
copper should cover as much area as possible.
? Other thermal sources should be placed as remote from the
device as possible
Signal traces
LJ package
footprint
0.7 mm
0.7 mm
LJ package
exposed
thermal pad
Top-layer
exposed copper
?0.3 mm via
Suggested PCB layout for thermal optimization (maximum
available bottom-layer copper recommended)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
10
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相关代理商/技术参数 |
参数描述 |
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| A4448RT | 制造商:Pentair Technical Products / Hoffman 功能描述:Wiring Trough 4.00x4.00x48.00 , 4.00x4.00x48.00, Steel |
| A-4448RT | 制造商:Pentair Technical Products / Hoffman 功能描述:Wiring Trough 4.00x4.00x48.00 |
| A4448T1T | 制造商:Pentair Technical Products / Hoffman 功能描述:4X4, 48 LONG TYPE 1 TROUGH Gray, 4.00x4.00x48.00, Steel |
| A445 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DISPLAY 0-20 OR 24MA |
| A4450KESTR-J | 功能描述:Buck-Boost Regulator Positive Output Step-Up/Step-Down DC-DC Controller IC 20-QFN (4x4) 制造商:allegro microsystems, llc 系列:汽车级，AEC-Q100 包装:剪切带（CT） 零件状态:新产品 输出类型:晶体管驱动器 功能:升压/降压 输出配置:正 拓扑:降压-升压 输出数:1 输出阶段:1 电压 - 电源（Vcc/Vdd）:3 V ~ 36 V 频率 - 开关:250kHz ~ 2.2MHz 占空比（最大）:- 同步整流器:无 时钟同步:是 串行接口:- 控制特性:使能，频率控制，软启动 工作温度:-40°C ~ 150°C（TJ） 封装/外壳:20-WFQFN 裸露焊盘 供应商器件封装:20-QFN（4x4） 标准包装:1 |
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