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  • 開關電源的有源功率因數校正電路設計方案

    有源功率因數校正可減少用電設備對電網的諧波污染,提高電器設備輸入端的功率因數。詳細分析了有源功率因數校正APFC(active power factor corrector)原理,采用平均電流控制模式控制原理,設計了基于UC3854BN芯片的一種有源功率因數校正電路方案,著重分析了電路主要參數的選擇和設計。實踐證明,采用APFC后,大大減小了輸入電流的諧波分量,實現了功率因數校正。

    標簽: 開關電源 有源功率因數 校正電路 設計方案

    上傳時間: 2013-10-21

    上傳用戶:immanuel2006

  • DC Power 基于Mega8數控電源

    內涵PCB及其原理圖(原PCB為crazyboye所制,Gavin盡量把雙面改一面,因為學校沒有制版機)

    標簽: Power Mega8 DC 數控電源

    上傳時間: 2013-11-24

    上傳用戶:674635689

  • 電源調整與虛擬地

    Abstract: Rail splitting is creating an artificial virtual ground as a reference voltage. It is used to set the signalto match the op amp's "sweet spot." An op amp has the most linear- and distortion-free qualities at that sweetspot. Typically, the sweet spot occurs near the center between the single power rail and ground. In the case ofa number of signals, the virtual ground can control channel DC errors when multiplexing or switching thesignals.

    標簽: 電源調整 虛擬地

    上傳時間: 2013-10-23

    上傳用戶:wushengwu

  • 源級驅動技術介紹_晶豐明源

    上海晶豐明源半導體有限公司(Bright Power Semiconductor ) 是一家從事電源管理芯片設計和銷售的公司,公司主要產品是大功率LED驅動芯片.

    標簽: 源級驅動 晶豐明源

    上傳時間: 2013-10-16

    上傳用戶:aysyzxzm

  • CN3052A(鋰離子電池充電器)

    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.

    標簽: 3052A 3052 CN 鋰離子電池

    上傳時間: 2013-11-10

    上傳用戶:子虛烏有

  • XAPP946-適用于Virtex-4 RocketIO MGT的開關電源

      This document presents design techniques and reference circuits that power Virtex™-4 FXRocketIO™ multi-gigabit transceivers (MGTs) operating at data rates below 3.125 Gb/s.When using multiple transceivers, it is sometimes preferred to power them from a switchingpower supply. However, switching power supplies generate noise that affects transceiver

    標簽: RocketIO Virtex XAPP 946

    上傳時間: 2013-11-18

    上傳用戶:huang111

  • 四路輸出開關轉換器提供TFT LCD面板的電源

      The LT®1943 is a highly integrated, 4-output regulatordesigned to power large TFT LCD panels. The LT1943employs switching regulators—instead of linear regulators—to minimize power dissipation and accommodate awide input voltage range. The wide input range, 4.5V to22V, allows it to accept a variety of power sources,including the commonly used 5V, 12V and 19V AC adaptors.

    標簽: TFT LCD 四路輸出 開關轉換器

    上傳時間: 2013-10-19

    上傳用戶:yuhaihua_tony

  • 電池管理系統的多點溫度測量方案

      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 measures the temperature of up to 12 thermistors. It powers and configures the multiplexers, and also putsthe muxes into shutdown to save power when not measuring temperatures.

    標簽: 電池管理系統 多點 溫度測量 方案

    上傳時間: 2013-10-29

    上傳用戶:xwd2010

  • 簡單的電池電路擴展以太網供電(PoE)峰值電流

      Power over Ethernet (PoE) is a new development thatallows for the delivery of power to Ethernet-based devicesvia standard Ethernet CAT5 cable, precluding the need forwall adapters or other external power sources. The PoEspecification defines a hardware detection protocol wherePower Sourcing Equipment (PSE) is able to identify PoEPowered Devices (PDs), thus allowing full backwardscompatibility with non-PoE-aware (legacy) Ethernetdevices.

    標簽: PoE 電池電路 擴展 以太網供電

    上傳時間: 2013-11-11

    上傳用戶:daoyue

  • 簡單、高效USB電源管理IC解決方案

      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.

    標簽: USB 電源管理IC 方案

    上傳時間: 2013-11-02

    上傳用戶:名爵少年

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