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Four

  • L293,L293E,L298高功率單片橋驅動器應用實例

    The L293, L293E and L298 each contain Four pushpull powerdriverswhich can be used independently or,m

    標簽: 293 L298 高功率 橋驅動器

    上傳時間: 2013-04-24

    上傳用戶:xsnjzljj

  • LM621無刷電機換向器

    General Description The LM621 is a bipolar IC designed for commutation of brushless DC motors. The part is compatible with both three- and Four-phase motors. It can directly drive the power switching devices used to drive the motor. The LM621 provides an adjustable dead-time circuit to eliminate ``shootthrough'' current spiking in the power switching circuitry. Operation is from a 5V supply, but output swings of up to 40V are accommodated. The part is packaged in an 18-pin, dual-in-line package.

    標簽: 621 LM 無刷電機

    上傳時間: 2013-07-24

    上傳用戶:sdq_123

  • 真有效值轉換器的自動調節

      The LTC®1966 is a true RMS-to-DC converter that uses aDS computational technique to make it dramatically simplerto use, significantly more accurate, lower in powerconsumption and more flexible than conventional logantilogRMS-to-DC converters. The LTC1966 RMS-to-DCconverter has an input signal range from 5mVRMS to1.5VRMS (a 50dB dynamic range with a single 5V supplyrail) and a 3dB bandwidth of 800kHz with signal crestfactors up to Four.

    標簽: 真有效值 轉換器 自動調節

    上傳時間: 2013-10-12

    上傳用戶:qilin

  • 電感開關穩壓器提高輸入電壓

    Abstract: Uses the MAX641 switching controller and an external discrete charge pump to step up the input voltage. This circuitcan service low loads and is efficient when the output is two, three, Four times the input voltage. Adding the MAX627 MOSdriver can further increase the output current capability.

    標簽: 電感 開關穩壓器 輸入電壓

    上傳時間: 2013-11-15

    上傳用戶:zwei41

  • DN442 I2C可控降壓緊湊型同步DC/DC穩壓器

      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.

    標簽: DC 442 I2C DN

    上傳時間: 2013-10-07

    上傳用戶:1583060504

  • GPON系統的APD偏置解決方案

      Avalanche photo diode (APD) receiver modules arewidely used in fi ber optic communication systems. AnAPD module contains the APD and a signal conditioningamplifi er, but is not completely self contained. It stillrequires signifi cant support circuitry including a highvoltage, low noise power supply and a precision currentmonitor to indicate the signal strength. The challenge issqueezing this support circuitry into applications withlimited board space. The LT®3482 addresses this challengeby integrating a monolithic DC/DC step-up converter andan accurate current monitor. The LT3482 can supportup to a 90V APD bias voltage, and the current monitorprovides better than 10% accuracy over Four decades ofdynamic range (250nA to 2.5mA).

    標簽: GPON APD 方案

    上傳時間: 2014-01-18

    上傳用戶:wenyuoo

  • 基于FPGA的高度集成DCDC穩壓器

      In a recent discussion with a system designer, the requirementfor his power supply was to regulate 1.5Vand deliver up to 40A of current to a load that consistedof Four FPGAs. This is up to 60W of power that must bedelivered in a small area with the lowest height profi lepossible to allow a steady fl ow of air for cooling. Thepower supply had to be surface mountable and operateat high enough effi ciency to minimize heat dissipation.He also demanded the simplest possible solution so histime could be dedicated to the more complex tasks. Asidefrom precise electrical performance, this solution had toremovethe heat generated during DC to DC conversionquickly so that the circuit and the ICs in the vicinity do notoverheat. Such a solution requires an innovative designto meet these criteria:

    標簽: FPGA DCDC 集成 穩壓器

    上傳時間: 2013-11-24

    上傳用戶:defghi010

  • DCDC穩壓器印刷電路板設計

      The LTM8020, LTM8021, LTM8022 and LTM8023 μModule®regulators are complete easy-to-use encapsulated stepdownDC/DC regulators intended to take the pain and aggravationout of implementing a switching power supplyonto a system board. With a μModule regulator, you onlyneed an input cap, output cap and one or two resistorsto complete the design. As one might imagine, this highlevel of integration greatly simplifi es the task of printedcircuit board design, reducing the effort to Four categories:component footprint generation, component placement,routing the nets, and thermal vias.

    標簽: DCDC 穩壓器 印刷電路板

    上傳時間: 2014-01-18

    上傳用戶:laomv123

  • P89LPC912英文資料

    The P89LPC912/913/914 are single-chip microcontrollers in low-cost 14-pin packages, based on a high performance processor architecture that executes instructions in two to Four clocks, six times the rate of standard 80C51 devices. Many system level functions have been incorporated into the P89LPC912/913/914 in order to reduce component count, board space, and system cost.

    標簽: P89 LPC 912 89

    上傳時間: 2013-10-12

    上傳用戶:司令部正軍級

  • 基于AT89S52的漢字顯示屏的設計

    介紹了一種基于AT89S52微處理器、鍵控顯示模式、多漢字顯示的顯示模塊設計方法。對AT89S52的內部功能及使用高128字節RAM時的尋址方式進行說明。給出了四漢字顯示模塊的硬件電路原理圖、主程序流程圖以及中斷顯示流程圖。 Abstract:  The design method of display module base on the AT89S52 microcontroller,display mode controlled by keyboard and? showing several Chinese characterses are introduced in the paper.The internal function and the addressing mode for the high 128B RAM of the AT89S52 are explained.The basic circuit diagram,the main program flow chart and the display interrupt flow chart of Four Chinese characterses display module are also given.

    標簽: 89S S52 AT 89

    上傳時間: 2014-01-23

    上傳用戶:咔樂塢

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