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  • DN1014同步降壓型控制器在汽車應(yīng)用中的電池壽命延長

      Battery powered applications that have a signifi cantamount of time in standby mode, require electrical circuitsto operate with a low quiescent current to preserve batterylife. The LTC3835 synchronous step-down controlleris an excellent solution with its ultralow quiescent current(80μA). Other features make it uniquely qualifi ed tosatisfy the needs of automotive applications. A wide 4Vto 36V input voltage range protects the supply againsthigh input voltage transients and is compatible with lowvoltage cold crank conditions. The constant frequencycurrent-mode architecture with high-side inductor current

    標(biāo)簽: 1014 DN 同步降壓型 控制器

    上傳時(shí)間: 2013-11-20

    上傳用戶:stewart·

  • 無需檢測電阻的小型DFN封裝電路斷路器

      Traditionally, an Electronic Circuit Breaker (ECB) comprisesa MOSFET, a MOSFET controller and a current senseresistor. The LTC®4213 does away with the sense resistorby using the RDS(ON) of the external MOSFET. The resultis a simple, small solution that offers a signifi cant lowinsertion loss advantage at low operating load voltage.The LTC4213 features two circuit breaking responses tovarying overload conditions with three selectable tripthresholds and a high side drive for an external N-channelMOSFET switch.

    標(biāo)簽: DFN 檢測電阻 封裝 電路斷路器

    上傳時(shí)間: 2014-03-02

    上傳用戶:lixinxiang

  • DN452 汽車應(yīng)用的電源監(jiān)視器

      The LTC®4151 is a high side power monitor that includesa 12-bit ADC for measuring current and voltage, as wellas the voltage on an auxiliary input. Data is read throughthe widely used I2C interface. An unusual feature in thisdevice is its 7V to 80V operating range, allowing it to coverapplications from 12V automotive to 48V telecom.

    標(biāo)簽: 452 DN 汽車應(yīng)用 電源監(jiān)視器

    上傳時(shí)間: 2013-10-29

    上傳用戶:集美慧

  • PCA9519 4channel level transla

    The PCA9519 is a 4-channel level translating I2C-bus/SMBus repeater that enables theprocessor low voltage 2-wire serial bus to interface with standard I2C-bus or SMBus I/O.While retaining all the operating modes and features of the I2C-bus system during thelevel shifts, it also permits extension of the I2C-bus by providing bidirectional buffering forboth the data (SDA) and the clock (SCL) lines, thus enabling the I2C-bus or SMBusmaximum capacitance of 400 pF on the higher voltage side. The SDA and SCL pins areover-voltage tolerant and are high-impedance when the PCA9519 is unpowered.

    標(biāo)簽: 4channel transla level 9519

    上傳時(shí)間: 2013-11-19

    上傳用戶:jisiwole

  • LPC315x系列ARM微控制器用戶手冊

    The NXP LPC315x combine an 180 MHz ARM926EJ-S CPU core, High-speed USB 2.0OTG, 192 KB SRAM, NAND flash controller, flexible external bus interface, an integratedaudio codec, Li-ion charger, Real-Time Clock (RTC), and a myriad of serial and parallelinterfaces in a single chip targeted at consumer, industrial, medical, and communicationmarkets. To optimize system power consumption, the LPC315x have multiple powerdomains and a very flexible Clock Generation Unit (CGU) that provides dynamic clockgating and scaling.The LPC315x is implemented as multi-chip module with two side-by-side dies, one fordigital fuctions and one for analog functions, which include a Power Supply Unit (PSU),audio codec, RTC, and Li-ion battery charger.

    標(biāo)簽: 315x LPC 315 ARM

    上傳時(shí)間: 2014-01-17

    上傳用戶:Altman

  • pcb layout design(臺灣硬件工程師15年經(jīng)驗(yàn)

    PCB LAYOUT 術(shù)語解釋(TERMS)1. COMPONENT SIDE(零件面、正面)︰大多數(shù)零件放置之面。2. SOLDER SIDE(焊錫面、反面)。3. SOLDER MASK(止焊膜面)︰通常指Solder Mask Open 之意。4. TOP PAD︰在零件面上所設(shè)計(jì)之零件腳PAD,不管是否鑽孔、電鍍。5. BOTTOM PAD:在銲錫面上所設(shè)計(jì)之零件腳PAD,不管是否鑽孔、電鍍。6. POSITIVE LAYER:單、雙層板之各層線路;多層板之上、下兩層線路及內(nèi)層走線皆屬之。7. NEGATIVE LAYER:通常指多層板之電源層。8. INNER PAD:多層板之POSITIVE LAYER 內(nèi)層PAD。9. ANTI-PAD:多層板之NEGATIVE LAYER 上所使用之絕緣範(fàn)圍,不與零件腳相接。10. THERMAL PAD:多層板內(nèi)NEGATIVE LAYER 上必須零件腳時(shí)所使用之PAD,一般稱為散熱孔或?qū)住?1. PAD (銲墊):除了SMD PAD 外,其他PAD 之TOP PAD、BOTTOM PAD 及INNER PAD 之形狀大小皆應(yīng)相同。12. Moat : 不同信號的 Power& GND plane 之間的分隔線13. Grid : 佈線時(shí)的走線格點(diǎn)2. Test Point : ATE 測試點(diǎn)供工廠ICT 測試治具使用ICT 測試點(diǎn) LAYOUT 注意事項(xiàng):PCB 的每條TRACE 都要有一個(gè)作為測試用之TEST PAD(測試點(diǎn)),其原則如下:1. 一般測試點(diǎn)大小均為30-35mil,元件分布較密時(shí),測試點(diǎn)最小可至30mil.測試點(diǎn)與元件PAD 的距離最小為40mil。2. 測試點(diǎn)與測試點(diǎn)間的間距最小為50-75mil,一般使用75mil。密度高時(shí)可使用50mil,3. 測試點(diǎn)必須均勻分佈於PCB 上,避免測試時(shí)造成板面受力不均。4. 多層板必須透過貫穿孔(VIA)將測試點(diǎn)留於錫爐著錫面上(Solder Side)。5. 測試點(diǎn)必需放至於Bottom Layer6. 輸出test point report(.asc 檔案powerpcb v3.5)供廠商分析可測率7. 測試點(diǎn)設(shè)置處:Setup􀃆pads􀃆stacks

    標(biāo)簽: layout design pcb 硬件工程師

    上傳時(shí)間: 2013-11-17

    上傳用戶:cjf0304

  • It provides a base of DICT web service ( similar to DICT rfc2229) and create relative applications (

    It provides a base of DICT web service ( similar to DICT rfc2229) and create relative applications (server side,client side), they are all SOAP based.

    標(biāo)簽: DICT applications provides relative

    上傳時(shí)間: 2015-01-12

    上傳用戶:alan-ee

  • It provides a base of DICT web service ( similar to DICT rfc2229) and create relative applications (

    It provides a base of DICT web service ( similar to DICT rfc2229) and create relative applications (server side,client side), they are all SOAP based.

    標(biāo)簽: DICT applications provides relative

    上傳時(shí)間: 2015-01-12

    上傳用戶:TF2015

  • Conservator extends on the concept of a Flyweight Factory by allowing shared Flyweight objects to be

    Conservator extends on the concept of a Flyweight Factory by allowing shared Flyweight objects to be mutated after creation without undesired side effects.

    標(biāo)簽: Flyweight Conservator allowing extends

    上傳時(shí)間: 2014-01-06

    上傳用戶:cuibaigao

  • Chipcon CC2420 reference design w/PA board rev B CC2420_w_PA_PCB.ZIP FABRICATION.PHO - fabricati

    Chipcon CC2420 reference design w/PA board rev B CC2420_w_PA_PCB.ZIP FABRICATION.PHO - fabrication drawing COPPER1.PHO - copper layer #1 (top side) COPPER2.PHO - copper layer #2 (inner ground plane) COPPER3.PHO - copper layer #3 (inner power plane) COPPER4.PHO - copper layer #4 (bottom side) TOPMASK.PHO - top side solder mask BOTTOMMASK.PHO - bottom side solder mask NCDRILL.DRL - drill data file NCDRILL.LST - drill list NCDRILL.REP - drill report

    標(biāo)簽: 2420 FABRICATION reference fabricati

    上傳時(shí)間: 2015-05-12

    上傳用戶:xc216

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