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CURRENT

交流瓦特/瓦特小時，乏爾/乏爾小時轉換器

交流瓦特/瓦特小時，乏爾/乏爾小時轉換器特點：精確度0.25%滿刻度多種輸入,輸出選擇輸入與輸出絕緣耐壓2仟伏特/1分鐘沖擊電壓測試5仟伏特(1.2x50us) 突波電壓測試2.5仟伏特(0.25ms/1MHz) (IEC255-4) 尺寸小，穩定性高主要規格：精確度: 0.25% F.S. (23 ±5℃) 輸入負載: <0.2VA (Voltage) <0.2VA (CURRENT) 最大過載能力: CURRENT related input:3 x rated continuous 10 x rated 30 sec. ,25 x rated 3sec. 50 x rated 1sec. Voltage related input:maximum 2 x rated continuous 輸出反應速度: < 250ms(0~90%) 輸出負載能力: < 10mA for voltage mode < 10V for CURRENT mode 輸出之漣波 : < 0.1% F.S. 脈波輸出型態: Photocouple of open collector (max.30V/40mA) 歸零調整范圍: 0~±5% F.S. 最大值調整范圍: 0~±10% F.S. 溫度系數: 100ppm/℃ (0~50℃) 隔離特性: Input/Output/Power/Case 絕緣阻抗: >100Mohm with 500V DC 絕緣耐壓能力: 2KVac/1 min. (input/output/power/case) 突波測試: ANSI C37.90a/1974,DIN-IEC 255-4 impulse voltage 5KV(1.2x50us) 使用環境條件: -20~60℃(20 to 90% RH non-condensed) 存放環境條件: -30~70℃(20 to 90% RH non-condensed) CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001

標簽： 瓦特交流轉換器

上傳時間： 2013-11-11

上傳用戶：wettetw
使用H橋變壓器驅動器,充電超級電容器

Abstract: With its small size and large load (10W) capability, the MAX13256 H-bridge transformer driver is an attractive solution forcharging supercapacitors (supercaps). However, a large capacitance on the output of the circuit can force the driver into fault modeat startup, due to the high initial charge CURRENT. This application note presents a solution that allows users to charge a largecapacitance without going into fault.

標簽： H橋變壓器驅動器充電超級電容器

上傳時間： 2013-10-20

上傳用戶：2728460838
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
如何保護集成FET的電源開關

Abstract: Some types of loads require more CURRENT during startup than when running. Other loads can be limited to a lower-powerCURRENT during startup but require a higher operating CURRENT. This article describes an application circuit that automatically adjusts apower circuit’s overCURRENT protection level up or down after startup is complete.

標簽： FET 保護集成電源開關

上傳時間： 2013-10-23

上傳用戶：swaylong
電流采樣方法

Sensing and/or controlling CURRENT flow is a fundamental requirement in many electronics systems, and the tech-niques to do so are as diverse as the applications them-selves.

標簽： 電流采樣

上傳時間： 2013-10-15

上傳用戶：daoyue
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
單片同步穩壓器驅動外部元件負載

The LTC®3414 offers a compact and efficient voltage regulatorsolution for point of load conversion in electronicsystems that require low output voltages (down to 0.8V)from a 2.5V to 5V power bus. Internal power MOSFETswitches, with only 67mW on-resistance, allow theLTC3414 to deliver up to 4A of output CURRENT with efficiencyas high as 94%. The LTC3414 saves space by operatingwith switching frequencies as high as 4MHz, enabling theuse of tiny inductors and capacitors.

標簽： 同步穩壓器元件驅動負載

上傳時間： 2014-01-03

上傳用戶：dongbaobao
100-15V TO 12V DCDC 原理圖 PCB BOM表

高的工作電壓高達100V N雙N溝道MOSFET同步驅動 The D810DCDC is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The D810DCDC uses a constant on-time valley CURRENT control architecture to deliver very low duty cycles with accurate cycle-by-cycle CURRENT limit, without requiring a sense resistor. A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifi er provides very fast line and load transient response. Large 1Ω gate drivers allow the D810DCDC to drive multiple MOSFETs for higher CURRENT applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. Integrated bias control generates gate drive power from the input supply during start-up and when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher effi ciency.

標簽： DCDC 100 12V BOM

上傳時間： 2013-10-24

上傳用戶：wd450412225
FP6291

DC/DC 升壓IC：The FP6291 is a CURRENT mode boost DC-DC converter. Its PWM circuitry with built-in 0.25 Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 6 external component counts. The non-inverting input of error amplifier connects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush CURRENT. The FP6291 is available in the SOT23-6L package and provides space-saving PCB for the application fields.

標簽： 6291 FP

上傳時間： 2013-11-07

上傳用戶：3294322651
DN1011 簡單高效率隔離型反激式電源

While simplicity and high effi ciency (for cool running) areno longer optional features in isolated power supplies, itis traditionally diffi cult to achieve both. Achieving higheffi ciency often requires the use of advanced topologiesand home-brewed secondary synchronous rectifi cationschemes once reserved only for higher power applications.This only adds to the parts count and to the designcomplexity associated with the reference and optocouplercircuits typically used to maintain isolation. Fortunately, abreakthrough IC makes it possible to achieve both high efficiency and simplicity in a synchronous fl yback topology.The LT®3825 simplifi es and improves the performance oflow voltage, high CURRENT fl yback supplies by providingprecise synchronous rectifi er timing and eliminating theneed for optocoupler feedback while maintaining excellentregulation and superior loop response.

標簽： 1011 DN 高效率隔離型

上傳時間： 2013-10-16

上傳用戶：wayne595