电源新闻
电子发烧友网为您提供最新开关电源新闻，UPS电源资讯，最精准的电源适配器要闻，是您了解芯片电源行业新闻动态的网络平台。
由USB端口便携式供应产生5 V和+3.3 V电源由USB端
Abstract: A portable device using the circuit of Figure 1 derives power from the USB bus. The MAX1811 uses USB power charges a lithium-ion (Li+) battery at, USB compatible, 100mA or 500mA rates. Battery power is then stepped up with the MA...
2009-04-30 1306
新增电流刺激驱动的USB接口充电器AC适配器-Add Cur
Abstract: A USB interface is capable of charging a portable device while transferring data. But for high-capacity batteries, the limited output current of USB hosts and hubs greatly extends the charging time. Powered USB hubs and USB hosts...
2009-04-30 988
用DS2711/12检测原电池
摘要：DS2711和DS2712标准NiMH电池充电器(专为1节或2节AA或AAA NiMH“标准”电池设计)能够检测原电池(一次电池，不可充电电池)，避免对其充电。本应用笔记介绍了各种来自不同厂商的电...
2009-04-30 904
可充电电池：原理，隐患，及安全充电方法
摘要：本文概要介绍了电池充电方式和现代电池技术，以使读者能更好的了解便携设备中使用的电池。本文对镍镉(NiCd)电池，镍氢(NiMH)电池和锂离子(Li+)电池的化学性质进行了描述，...
2009-04-30 2074
用USB为电池充电
摘要：USB作为低功耗电子产品(大多数为电池供电产品)的电源提供了越来越多的应用机会，无处不在的USB也为充电器设计提供了更多机会和更大的挑战。本文介绍了电池充电器与USB电...
2009-04-30 907
提高MAX1737锂离子电池充电器的精度-Improving
Abstract: This application note describes how to improve full-scale current-sense and charge-termination accuracy of the MAX1737 lithium-ion (Li+) battery charger. The MAX1737 current-sense is more accurate than stated in the data sheet, b...
2009-04-30 1442
nMOS晶体管与DS2714的配合使用
摘要：DS2714独立式NiMH电池充电器的数据资料中提供了一个使用pnp晶体管的应用电路，利用pnp晶体管对充电电流进行开、关控制。这种方式可能存在某些问题，因为充电控制引脚的电...
2009-04-30 1282
充电电池和单机快速充电器概述
摘要：本应用笔记简单介绍了镍镉(NiCd)、镍氢(NiMH)和锂离子(Li-Ion，Li+)可充电电池, 讨论它们的性能，并说明在不需要微控制器的情况下如何构建单机结构，安全、快速地为镍氢和锂...
2009-04-30 847
锂离子电池充电运行的安全问题减少-Understanding
Abstract: Due to the high energy/power density, in relation to the weight and volume of Lithium-ion (Li+) battery technology, there are some lingering safety concerns when charging and discharging the batteries. Although an already mature ...
2009-04-30 1459
简化1节Li+电池供电设备的设计
摘要：MAX8671X电源管理IC (PMIC)能够为便携系统设计提供锂电池充电及电源稳压，该器件可利用USB端口或外部AC-DC电源适配器作为输入电源为锂离子(Li+)、锂聚合物(Li-Poly)电池充电。PMIC...
2009-04-30 647
估算DS2712 NiMH电池充电器的开关速度
摘要：开关模式下，DS2712电池充电器的开关速度因电感选择、充电电流和电池电压而有所不同。某些情况下，需要了解各种条件下的开关速度，以解决噪声灵敏度、峰值充电电流和...
2009-04-30 1036
Step-Up Supply Charges Battery
The circuit of Figure 1 supports the many portable applications in which a microprocessor (µP) or microcontroller (µC) controls charging of the battery. IC1 is a step-up switching regulator that boosts VIN (nominally 5V) as nec...
2009-04-30 1315
稳压电荷泵提供50毫安-Regulated Charge P
The DC-DC converter circuit of Figure 1 substitutes a voltage tripler in place of the external inductor and diode normally associated with switching regulator IC1. Inverting and noninverting drivers in the MOSFET-driver chip (IC2) activate...
2009-04-30 798
新发展的电池充电器-New Developments in
Electronic equipment is increasingly becoming smaller, lighter, and more functional, thanks to the push of technological advancements and the pull from customer demand. The result of these demands has been rapid advances in battery technol...
2009-04-30 1338
Dual-Voltage Supply Powers SIM
Global-system-for-mobile-communication phones have a subscriber-identification module (SIM) that allows local wireless providers to recognize the user and his or her billing information. Although most SIMs are changing to 3V operation, the...
2009-04-30 493
简单的电路断开负载-Simple Circuit Disco
Placing a load-disconnect circuit on the output of a bootstrapped step-up regulator allows the regulator to start with load currents much higher than would otherwise be possible (Figure 1). During shutdown, the disconnect completely isolat...
2009-04-30 1061
Push-Pull Driver Provides Isol
The circuit in Figure 1 converts a regulated 5V input to an isolated 5V output with 1A current-output capability. IC1, a push-pull transformer driver, powers a pair of cross-coupled power MOSFETs in a flip-flop-like configuration. In turn,...
2009-04-30 1702
CPU核心供电-Powering Portable CPU
Providing electrical power for CPUs and other high-density logic has never been easy, though it appeared for awhile that technology would eventually reduce the power needed for computing tasks. Although technology advances have been rapid,...
2009-04-30 1013
电路折衷降低噪音电池输入电源-Circuit Tradeof
Analyzing noise from the perspective of portable-system design will help you in making appropriate trade-off in power-supply design. RF-communicating computers and other new mobile systems can act as portable generators of unwanted...
2009-04-30 1230
反馈分离增强供电的安全和性能-Feedback Isolat
Isolated power supplies have been around since the beginning of the electronics industry. As power-supply designs change to keep pace with increased efficiency and power-density demands, isolated feedback is crucial to maintaining safety....
2009-04-30 948
Proper Handling Helps Make the
Abstract: Li-ion batteries pack the most power per unit volume, but excessive charging or discharging can damage or destroy the battery and its surroundings. Carefully designed circuits can help you avoid such dire consequences. ...
2009-04-29 1153
Synchronous Rectification Aids
Synchronous rectifiers can improve switching-power-supply efficiency, particularly in low-voltage low-power applications. This article compares synchronous rectifiers to Schottky-diode types and illustrates some circuit tricks useful in th...
2009-04-29 1727
多功能集成电路启用化学独立电池充电-Versatile IC
Fast-moving battery technology poses a question for designers: whether to choose the latest technology for maximum performance or to sacrifice performance for a mature and more reliable technology. The advent of chemistry-independent batte...
2009-04-29 517
反向电流保护电路-Reverse-Current Circu
Battery reversal can be fatal to portable equipment. However, numerous circuits can protect against the backward installation of batteries and other overcurrent-causing conditions. Battery-operated equipment is prone to the consequ...
2009-04-29 3454
Flyback Converter Serves Batte
Abstract: This article describes the design of a flyback power converter to operate CCD equipment such as digital cameras from four AAA cells. The MAX752 and a multiple output transformer deliver +15V, -7.5V and 5V. First pass design had l...
2009-04-29 1717
调节器拓扑电池供电系统-Regulator Topologi
Power supplies are perhaps the most crucial elements of a battery-powered system. Knowledge of some basic regulator topologies will help you select or design the right supply configurations for your needs.Portable computers and dig...
2009-04-29 1112
电力保护3V/5V双电源系统-Power Conservat
Power saving is the common denominator for lower supply voltage and portable electronic systems. The paramount need in battery-powered and portable electronics—saving power—is also the major benefit in moving from 5V to 3.3V (and lower...
2009-04-29 1241
电荷泵服务的便携式设计-Charge Pumps Shine
New-generation ICs have combined with passive-component improvements to make charge-pump voltage conversion a favored approach in many applications. In many cases, the earlier charge pumps were considered either unsuitable or acceptable on...
2009-04-29 2187
编辑推荐厂商产品技术软件/工具OS/语言教程专题
| 电机控制 | DSP | 氮化镓 | 功率放大器 | ChatGPT | 自动驾驶 | TI | 瑞萨电子 |
| BLDC | PLC | 碳化硅 | 二极管 | OpenAI | 元宇宙 | 安森美 | ADI |
| 无刷电机 | FOC | IGBT | 逆变器 | 文心一言 | 5G | 英飞凌 | 罗姆 |
| 直流电机 | PID | MOSFET | 传感器 | 人工智能 | 物联网 | NXP | 赛灵思 |
| 步进电机 | SPWM | 充电桩 | IPM | 机器视觉 | 无人机 | 三菱电机 | ST |
| 伺服电机 | SVPWM | 光伏发电 | UPS | AR | 智能电网 | 国民技术 | Microchip |
| 开关电源 | 步进电机 | 无线充电 | LabVIEW | EMC | PLC | OLED | 单片机 |
| 5G | m2m | DSP | MCU | ASIC | CPU | ROM | DRAM |
| NB-IoT | LoRa | Zigbee | NFC | 蓝牙 | RFID | Wi-Fi | SIGFOX |
| Type-C | USB | 以太网 | 仿真器 | RISC | RAM | 寄存器 | GPU |
| 语音识别 | 万用表 | CPLD | 耦合 | 电路仿真 | 电容滤波 | 保护电路 | 看门狗 |
| CAN | CSI | DSI | DVI | Ethernet | HDMI | I2C | RS-485 |
| SDI | nas | DMA | HomeKit | 阈值电压 | UART | 机器学习 | TensorFlow |
| Arduino | BeagleBone | 树莓派 | STM32 | MSP430 | EFM32 | ARM mbed | EDA |
| 示波器 | LPC | imx8 | PSoC | Altium Designer | Allegro | Mentor | Pads |
| OrCAD | Cadence | AutoCAD | 华秋DFM | Keil | MATLAB | MPLAB | Quartus |
| C++ | Java | Python | JavaScript | node.js | RISC-V | verilog | Tensorflow |
| Android | iOS | linux | RTOS | FreeRTOS | LiteOS | RT-THread | uCOS |
| DuerOS | Brillo | Windows11 | HarmonyOS |
工商网监