開(kāi)關(guān)電源設(shè)計(jì)與開(kāi)發(fā) 資料
標(biāo)簽： 開(kāi)關(guān)電源設(shè)計(jì)
上傳時(shí)間： 2014-12-24
上傳用戶(hù)：38553903210
設(shè)計(jì)時(shí)需要過(guò)一款簡(jiǎn)單、低成本的閂鎖電路 (latch circuit) ？圖一顯示的就是這樣一款電路，基本上是一個(gè)可控矽整流器(SCR)，結(jié)合了一些離散組件，只需低成本的元件便可以提供電源故障保護(hù)。
上傳時(shí)間： 2013-11-11
上傳用戶(hù)：zq70996813
在電源設(shè)計(jì)中，工程人員時(shí)常會(huì)面臨控制 IC 驅(qū)動(dòng)電流不足的問(wèn)題，或者因?yàn)殚l極驅(qū)動(dòng)損耗導(dǎo)致控制 IC 功耗過(guò)大。為解決這些問(wèn)題，工程人員通常會(huì)採(cǎi)用外部驅(qū)動(dòng)器。目前許多半導(dǎo)體廠商都有現(xiàn)成的 MOSFET 積體電路驅(qū)動(dòng)器解決方案，但因?yàn)槌杀究剂浚こ處熗鶗?huì)選擇比較低價(jià)的獨(dú)立元件。
上傳時(shí)間： 2013-11-19
上傳用戶(hù)：阿譚電器工作室
開(kāi)關(guān)電源設(shè)計(jì)資料
標(biāo)簽： 開(kāi)關(guān)電源 設(shè)計(jì)實(shí)例 調(diào)試
上傳時(shí)間： 2013-11-08
上傳用戶(hù)：李哈哈哈
移動(dòng)電源方案功能要求: 1、單芯片控制充電、升壓輸出、電量指示功能，輸出電流可達(dá)1A，效率90%以上 按開(kāi)關(guān)鍵開(kāi)機(jī)6燈頻閃幾次后待機(jī)， LI為充電指示，L2頻閃指示有輸出。L2I常亮為輸出充滿指示，L3-L6為電量指示。在輸出時(shí)L2頻閃。充電時(shí)LI頻閃。當(dāng)有負(fù)載設(shè)備連接時(shí)自動(dòng)輸出，無(wú)負(fù)載電流轉(zhuǎn)為待機(jī)。 當(dāng)按開(kāi)關(guān)工作后，無(wú)負(fù)載（無(wú)操作）10秒自動(dòng)關(guān)機(jī)。 2、移動(dòng)電源方案，單芯片控制為內(nèi)電池充電、升壓輸出、電量顯示、邊充邊放；輸入電壓5V、300-1000MA，輸出電壓5V、；輸出電流可達(dá)1A，輸出效率90%以上 1）、電性能參數(shù)： USB輸入電壓：DC 5V 輸出DC5V
標(biāo)簽： 移動(dòng)電源 方案
上傳時(shí)間： 2013-11-19
上傳用戶(hù)：wangfei22
The CN3052A is a complete constant-current /constant voltage linear charger for single cell Li-ion and Li Polymer rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need for the external sense resistor and blocking diode.
上傳時(shí)間： 2013-11-10
上傳用戶(hù)：子虛烏有
Linear Technology offers a variety of devices that simplifyconverting power from a USB cable, but the LTC®3455represents the highest level of functional integration yet. The LTC3455 seamlessly manages power flowbetween an AC adapter, USB cable and Li-ion battery,while complying with USB power standards, all from a4mm × 4mm QFN package. In addtion, two high efficiencysynchronous buck converters generate low voltage railswhich most USB-powered peripherals require. TheLTC3455 also provides power-on reset signals for themicroprocessor, a Hot SwapTM output for poweringmemory cards as well as an uncommitted gain blocksuitable for use as a low-battery comparator or an LDOcontroller. The PCB real estate required for the entire USBpower control circuit and two DC/DC converters is only225mm2.
上傳時(shí)間： 2013-11-02
上傳用戶(hù)：名爵少年
Although recent popular attention is focused on LithiumIon batteries, one must not forget that other batterychemistries, such as Nickel Cadmium (NiCd) and NickelMetal Hydride (NiMH) have advantages in rechargeablepower systems. Nickel-based batteries are robust, capableof high discharge rates, have good cycle life, do notrequire special protection circuitry and are less expensivethan Li-Ion. Among the two, NiMH batteries are rapidlyreplacing NiCd because of their higher capacity (40% to50% more) and the environmental concerns of the toxiccadmium contained in NiCd batteries.
標(biāo)簽： NiMH NiCd 獨(dú)立 電池充電
上傳時(shí)間： 2013-11-04
上傳用戶(hù)：qq10538412
A number of conventional solutions have been available forthe design of a DC/DC converter where the output voltageis within the input voltage range—a common scenarioin Li-Ion battery-powered applications—but none werevery attractive until now. Conventional topologies, suchas SEPIC or boost followed by buck, have numerousdisadvantages, including low effi ciency, complex magnetics,polarity inversion and/or circuit complexity/cost. TheLTC®3785 buck-boost controller yields a simple, effi cient,low parts-count, single-converter solution that is easyto implement, thus avoiding the drawbacks associatedwith traditional solutions.
上傳時(shí)間： 2013-10-21
上傳用戶(hù)：ljt101007
The LTC®3562 quad output step-down regulator is designedfor multicore handheld microprocessor applications thatoperate from a single Li-Ion battery. Its four monolithic, higheffi ciency buck regulators support Intel’s mobile CPU P-Stateand C-State energy saving operating modes. The outputvoltages are independently controllable via I2C, and eachoutput can be independently started and shut down. Designerscan choose from power saving pulse-skipping mode orBurst Mode® operation, or select low noise LDO mode. Thespace-saving LTC3562 is available in a 3mm × 3mm QFNpackage and requires few external components.
上傳時(shí)間： 2013-10-07
上傳用戶(hù)：1583060504
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