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单节锂离子充电座充电器线性AC适配器-Single-Cell

单节锂离子充电座充电器线性AC适配器-Single-Cell

Abstract: The single cell Lithium-ion (Li-ion) battery charger that does not dissipate power (no heat) can also use a low cost linear AC adapter. This application note discusses how to design a simple and low-cost Li-ion charger. ...

2009-04-30 标签:AC适配器 580

如何最大限度地减少功耗锂离子线性充电器-How to Min

如何最大限度地减少功耗锂离子线性充电器-How to Min

Abstract: Techniques are described for minimizing power dissipation in linear battery chargers. Beginning with a stable wall-cube switching power source, methods are described to limit the dissipation in the linear charging circuit. Circui...

2009-04-30 标签: 364

设计一个电源的便携式无线联络管理-Design Case S

设计一个电源的便携式无线联络管理-Design Case S

Abstract: A portable wireless contact manager called Spotme was designed by the Swedish company Shockfish SA. Spotme was powered by a 4.2V Li+ rechargeable battery. However, the internal communicator circuitry requires four different volta...

2009-04-30 标签:电源无线 357

How to Design Battery Charger

How to Design Battery Charger

Abstract: Notebook computers increasingly require complex battery charging algorithms and systems. This article provides information and background on lithium-ion (Li+), nickel-cadmium (NiCd), and nickel-metal-hydride (NiMH) batteries and ...

2009-04-30 标签:BatteryCh 2513

Switch-Mode, Linear, and Pulse

Switch-Mode, Linear, and Pulse

Abstract: There are three methods to charging Li+ batteries: switch-mode, linear and pulse. Each method has its advantages and disadvantages. Switch-mode charging minimizes power dissipation over a wide range of AC adapter voltages, but co...

2009-04-30 标签:Switch-Mod 930

正确的布局和元件选择控制电磁干扰

正确的布局和元件选择控制电磁干扰

Proper Layout and Component Selection Controls EMI Abstract: Understanding the physics of voltage regulator topologies is important in designing power systems for EMI and EMC compliance. In particular, the physical princi...

2009-04-30 标签:电磁干扰 302

由USB端口便携式供应产生5 V和+3.3 V电源由USB端

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 标签:USB端口 606

新增电流刺激驱动的USB接口充电器AC适配器-Add Cur

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 标签:USB接口AC适配 540

用DS2711/12检测原电池

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 标签:DS2711 461

可充电电池:原理,隐患,及安全充电方法

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 标签:充电电池 1033

用USB为电池充电

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 标签:USB 413

提高MAX1737锂离子电池充电器的精度-Improving

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 标签:MAX1737 634

nMOS晶体管与DS2714的配合使用

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 标签:晶体管 648

充电电池和单机快速充电器概述

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 标签:充电电池 354

锂离子电池充电运行的安全问题减少-Understanding

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 标签: 411

简化1节Li+电池供电设备的设计

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 标签:供电设备 312

估算DS2715 NiMH电池充电器的开关速度

估算DS2715 NiMH电池充电器的开关速度

摘要:DS2715电池充电器的开关速度因充电模式、电感选择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、峰值充电电流和电感选择限制等...

2009-04-30 标签:DS2715 299

估算DS2712 NiMH电池充电器的开关速度

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 标签:DS2712 484

简化锂离子(Li+)电池充电器测试

简化锂离子(Li+)电池充电器测试

摘要:由于Li+电池充电器的充电过程会持续一个小时甚至更长的时间,利用实际负载(即电池)对充电器进行测试将非常耗时。本应用笔记介绍了一种简单的Li+电池仿真方法,与采用实...

2009-04-30 标签: 197

Step-Up Supply Charges Battery

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 标签:BaCharges 354

Dual Boost Regulator Handles H

Dual Boost Regulator Handles H

Among 2-cell boost regulators, five watts (5V at 1A) is "high power." But, obtaining even 5W from a 2-cell or 3-cell battery is not a trivial problem. Peak currents exceed 2A, and the small voltage drops they produce in the power devices, ...

2009-04-30 标签:BoostRegu 531

稳压电荷泵提供50毫安-Regulated Charge P

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 标签:电荷 436

能源管理的小型便携式系统-Energy Management

能源管理的小型便携式系统-Energy Management

Numerous diverse and conflicting constraints burden the designer of small hand-held products. Aside from the customary restrictions on size and weight, these constraints include cost limitations, strict time schedules, battery-life goals m...

2009-04-30 标签:能源管理 2099

新发展的电池充电器-New Developments in

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 标签: 786

电源集成电路制双电压便携式音箱-Power-Supply I

电源集成电路制双电压便携式音箱-Power-Supply I

电源集成电路制双电压...

2009-04-30 标签:集成电路 906

High-Voltage PWM Controller Yi

High-Voltage PWM Controller Yi

High-Volta...

2009-04-30 标签:Controller 949

Dual-Voltage Supply Powers SIM

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 标签:Dual-Volta 223

简单的电路断开负载-Simple Circuit Disco

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 标签:负载 439

Push-Pull Driver Provides Isol

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 标签:Driver 725

CPU核心供电-Powering Portable CPU

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 标签:CPU 414

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