搜索结果
找到约 44 项符合
Lead 的查询结果
按分类筛选
PCB相关 表面贴装设计和焊盘图形标准通用要求
IPC-7351不只是一个强调新的元件系列更新的焊盘图形的标准,如方型扁平无引线封装QFN (Quad Flat No-Lead)和小外型无引线封装SON (Small Outline No-Lead);还是一个反映焊盘图形方面的研发、分类和定义——这些建立新的工业CAD数据库的关键元素——的全新变化的标准。 ...
行业应用文档 l298电机芯片驱动原理 (DUAL FULL-BRIDGE DRIVER)
The L298 is an integratedmonolithic circuit in a 15- lead Multiwatt and PowerSO20 packages. It is a
经验分享 QFN SMT工艺设计指导
QFN SMT工艺设计指导.pdf
一、基本介绍
QFN(Quad Flat No Lead)是一种相对比较新的IC封装形式,但由于其独特的优势,其应用得到了快速的增长。QFN是一种无引脚封装,它有利于降低引脚间的自感应系数,在高频领域的应用优势明显。QFN外观呈正方形或矩形,大小接近于CSP,所以很薄很轻。元件底部具有与底面水平的焊端, ...
模拟电子 校准触摸屏系统研究
Abstract: Mechanical misalignment and scaling factors lead to a mismatch between the values coming from a touchscreen panel (as translated by a touch screen controller) and the display (typically an LCD) on which the touch screenpanel is mounted. This tutorial discusses how to calibrate the touch ...
模拟电子 DAC技术用语 (D/A Converters Defini
Differential Nonlinearity: Ideally, any two adjacent digitalcodes correspond to output analog voltages that are exactlyone LSB apart. Differential non-linearity is a measure of theworst case deviation from the ideal 1 LSB step. For example,a DAC with a 1.5 LSB output change for a 1 LSB digital codec ...
PCB相关 IC封裝製程簡介(IC封装制程简介)
半導體的產品很多,應用的場合非常廣泛,圖一是常見的幾種半導體元件外型。半導體元件一般是以接腳形式或外型來劃分類別,圖一中不同類別的英文縮寫名稱原文為
 
PDID:Plastic Dual Inline Package
SOP:Small Outline Package
SOJ:Small Outline J-Lead Package
PLCC:Plastic Leaded Chip Carrier
QFP:Quad Fla ...
电源技术 电池管理系统的多点温度测量方案
 
Abstract: It is critically important that lithium-ion battery stacks have a good battery-management system for monitoring many cellvoltages and cell temperatures. Without that monitoring, thermal runaway can lead to a battery explosion. This design idea presentsa low-power circuit that me ...
电源技术 Wide-input dc/dc modules offer
When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typ ...
单片机编程 单片机控制的铅酸蓄电池充电电源
 为了有效地提升铅酸蓄电池的使用寿命,同时实现对充电过程的监控,设计出一种用单片机控制的36 V铅酸蓄电池充电电源。本电路采用反激式拓扑,连续电流工作模式,电源管理IC设计在电源的副边,由ELAN公司的EM78P258N单片机模拟,是用可编程器件模拟电源管理IC,实现智能电源低成本化的一次成功尝试,通过对单片机的软 ...
单片机编程 LS7266R1在电子式万能材料试验机中的应用
针对材料试验机等设备中要求测量或控制材料拉伸或压缩的位移,一般采用光电轴角编码器检测位置信号,输出正交编码脉冲信号。若采用其他方法检测位置信号,必然导致电路设计复杂,可靠性降低。因此,提出一种基于LS7266R1的电子式万能材料试验机设计方案。给出了试验机中的控制器工作原理,LS7266R1与单片机的接口硬件设计, ...