電源/新能源
提供權(quán)威的電源和新能源設(shè)計(jì)及電源管理資訊，內(nèi)容有醫(yī)療/工業(yè)電源、LED驅(qū)動(dòng)、數(shù)字電源、電池技術(shù)、太陽(yáng)能光伏等電源技術(shù)方案，包括電源測(cè)試/仿真/認(rèn)證、便攜電源、電動(dòng)車/新能源、AC-DC與DC-DC轉(zhuǎn)換、基準(zhǔn)/監(jiān)控/保護(hù)電路等專業(yè)領(lǐng)域。
The FET-OR Connection for Powe
Abstract: This power-supply sequencer senses a loss of the main supply voltage and, by controlling the two FETs, automatically switches the load to the secondary (backup) supply. The Figure 1 circuit provides a "diode-OR"...
2009-04-30 標(biāo)簽：FET 992
使用DS2746確定一個(gè)電池包基于識(shí)別電阻-Using th
Abstract: The DS2746 has two auxiliary inputs to allow voltage sampling of resistor divider circuits; these inputs are ideal for measuring thermistor or battery-pack identification resistors. This application note describes how to calculat...
2009-04-30 標(biāo)簽：DS2746 1085
電路提供電池反向保護(hù)-Circuit Provides Re
A universal problem in battery-operated devices is the threat of damage when an end user (never an engineer) inserts the battery backward. You can avoid damage by inserting a single diode or by using a diode-bridge configuration, but those...
2009-04-30 標(biāo)簽：電路 680
檢測(cè)和校準(zhǔn)1 DS2760鋰電池監(jiān)測(cè)與保護(hù)器電路-Testi
Abstract: This application note describes to the reader how to properly test a circuit board and battery pack containing a Dallas Semiconductor DS2760 battery monitor and protector. A step-by-step test procedure is provided which can be fo...
2009-04-30 標(biāo)簽：DS2760 1607
DS276x產(chǎn)品比較-DS276x Product Comp
Abstract: This application note describes the differences between the DS2760 battery monitor and protector and the DS2761 battery monitor and protector. It describes each difference in detail and indicates what, if any, changes would be re...
2009-04-30 標(biāo)簽：DS276x 1142
校準(zhǔn)偏置注冊(cè)的DS2761-Calibrating the
Abstract: The DS2761 contains a current offset register that can be utilized by the designer to eliminate inherent offset introduced by the current A/D within the IC. Improper calibration of this register, however, can negate any positive ...
2009-04-30 標(biāo)簽：DS2761 1177
Overcurrent/Overdischarge Prot
Abstract: This application note describes the use of a current-sense amplifier with internal dual comparators to monitor and protect against too low battery voltage and too high battery current. While written for lead-acid batteries, the c...
2009-04-30 標(biāo)簽：Batteries 1359
MOSFET驅(qū)動(dòng)器是電池反向保護(hù)-MOSFET Driver
Abstract: MOSFET power-switch drivers must be protected from a reverse-battery connection. A small rectifier diode can protect against reversed batteries, but that approach is generally unacceptable for systems in which battery life is cru...
2009-04-30 標(biāo)簽：驅(qū)動(dòng)器 1652
電路的鎳氫電池可單模擬鋰電池-Circuit Enables
Abstract: This circuit uses a NiMH cell to replace a lithium battery. Its output simulates the discharge characteristic of a lithium (Li+) battery. IntroductionLithium-based (Li+) batteries are becoming common ...
2009-04-30 標(biāo)簽：鋰電池 819
充電器反接時(shí)，DS2784高邊nFET保護(hù)器的保護(hù)電路
摘要：DS2784高邊nFET保護(hù)器沒(méi)有針對(duì)充電器反接的保護(hù)電路。因此，故障狀態(tài)下，如果充電器反向連接，DC FET將可能處于導(dǎo)通狀態(tài)。本文介紹了發(fā)生充電器反接時(shí)可使DC FET保持關(guān)閉的...
利用DS2726在充電器反接時(shí)保護(hù)Li+電池
摘要：本應(yīng)用筆記通過(guò)簡(jiǎn)單的設(shè)計(jì)修改，可以利用DS2726 Li+電池保護(hù)器承受負(fù)壓，在充電器反接時(shí)為電池提供保護(hù)。 概述充電器反接會(huì)損壞DS2726 Li+電池保護(hù)器。...
Switch-Mode Supply Charges Bat
In the portable-system power supply of Figure 1, L2 and Q2 are part of an unorthodox battery-charger configuration for the auxiliary switch-mode output (which normally generates a negative bias voltage for LCDs). Combining the battery char...
2009-04-30 標(biāo)簽：Battery 2072
升壓型DC-DC電壓調(diào)節(jié)器轉(zhuǎn)換為電流源的電池充電-Boost
Abstract: A boost DC-DC controller built with the MAX1771 DC-DC controller makes a simple switch-mode current source that is useful for battery charging. The voltage control loop is disabled so that the current control loop provides regula...
2009-04-30 標(biāo)簽：電流源 1647
One-Hour Battery Charger Has S
Because battery charges control power, they resemble regulators in some respects. Linear chargers, for example, are less efficient than switching types when operating at high current and a large VIN - VOUT difference. A linear charger, pow...
2009-04-30 標(biāo)簽：Battery 1562
Comparing the I²C Bus to
Abstract: The I²C bus and the SMBus™ are popular 2-wire buses that are essentially compatible with each other. Normally devices, both masters and slaves, are freely interchangeable between both buses. Both buses feature addressa...
2009-04-30 標(biāo)簽：bus 1026
利用太陽(yáng)能與智能功率轉(zhuǎn)換技術(shù)-Harnessing Sola
Abstract: Charge NiCd or NiMH batteries with solar cells. This circuit extracts the maximum power from a solar array to charge a battery stack. It employs the MAX856 boost converter and MAX982 dual comparator with reference. ...
2009-04-30 標(biāo)簽：太陽(yáng)能 979
輸入電流限制電池充電器移動(dòng)計(jì)算應(yīng)用-Input Curren
Additional Information: Quick View Data Sheet for the MAX1645/MAX1645A Quick View Data Sheet for the MAX1772 Technical Support: Power IntroductionWith the increasing demand for mobile ...
2009-04-30 標(biāo)簽： 1339
選擇的電池充電系統(tǒng)的體系結(jié)構(gòu)-Choices for Bat
The SMBus™ specification has done a great deal to standardize the interface between portable products, batteries, and chargers. SMBus was defined in 1995, and it has steadily gained in popularity. SMBus charger ICs are more complex t...
2009-04-30 標(biāo)簽： 534
Simple Circuit Charges Lead-Ac
Abstract: A flyback converter implements a current-limited power supply to charge lead-acid batteries. The MAX773 current-mode controller limits the output current and the flyback transformer provides isolation and flexibility for input vo...
2009-04-30 標(biāo)簽：circuit 1833
便攜式設(shè)備需要高性能的電池充電器-Portable Devi
Abstract: Three techniques are shown for charging lithium-ion (Li+) batteries. Linear, switch-mode, and pulse circuits are shown for each type. The proliferation of portable devices in recent years has underlined the need...
2009-04-30 標(biāo)簽： 1353
超低電阻表面貼裝電流分流-Ultra-Low Resista
Abstract: Ultra-low resistance surface mount current-sense resistors seem like the ideal package. The physical design, a strap of metal, seems ideal, offering the lowest inductance possible. Too often these resistors need some kind of resi...
單節(jié)鋰離子充電座充電器線性AC適配器-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 標(biāo)簽：AC適配器 1764
如何最大限度地減少功耗鋰離子線性充電器-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 標(biāo)簽： 1303
設(shè)計(jì)一個(gè)電源的便攜式無(wú)線聯(lián)絡(luò)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...
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 ...
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 標(biāo)簽：Switch-Mod 2108
正確的布局和元件選擇控制電磁干擾
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 標(biāo)簽：電磁干擾 992
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