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Ahmet UZUN

18W RF power consecutive devices (2SC1970, 1941,1942) - 0 views

www.uydudoktoru.com/...vices-2sc1970-1941-1942-a.html

18W RF power consecutive devices (2SC1970 1941 1942)

shared by Ahmet UZUN on 14 Oct 11 - No Cached
  • Ahmet UZUN on 14 Oct 11
     
    18W RF power consecutive devices (2SC1970, 1941,1942)
  • Ahmet UZUN on 14 Oct 11
     
    18W RF power consecutive devices (2SC1970, 1941,1942)
Ahmet UZUN

0-30 vdc stabılızed power supply wıth current control 0.002-3 a - 0 views

www.uydudoktoru.com/current-control-0-002-3-a.html

0-30 vdc stabılızed power supply wıth current control 0.002-3 a

shared by Ahmet UZUN on 14 Mar 12 - No Cached
  • Ahmet UZUN on 14 Mar 12
     
    "0-30 VDC STABILIZED POWER SUPPLY WITH CURRENT CONTROL 0.002-3 A 0-30 VDC STABİLİZE GÜÇ KAYNAĞI İLE AKIM KONTROL,002-3 A Orijinal görüntüsünü görmek için buraya tıklayın. 925x541 px. General Description This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of three amperes that the circuit can deliver. This feature makes this power supply indispensable in the experimenters laboratory as it is possible to limit the current to the typical maximum that a circuit under test may require, and power it up then, without any fear that it may be damaged if something goes wrong. There is also a visual indication that the current limiter is in operation so that you can see at a glance that your circuit is exceeding or not its preset limits. Technical Specifications - Characteristics Input Voltage: ................ 24 VAC Input Current: ................ 3 A (max) Output Voltage: ............. 0-30 V adjustable Output Current: ............. 2 mA-3 A adjustable Output Voltage Ripple: . 0.01 % maximum FEATURES - Reduced dimensions, easy construction, simple operation. - Output voltage easily adjustable. - Output current limiting with visual indication. - Complete protection of the supplied device against over loads and malfunction. How it Works To start with, there is a step-down mains transformer with a secondary winding rated at 24 V/3 A, which is connected across the input points of the circuit at pins 1 & 2. (the quality of the supplies output will be directly proportional to the quality of the transformer). The AC voltage of the transformers secondary winding is rectified by the bridge formed by the four diodes D1-D4. The DC voltage taken across the output of the bridge is smoothed by the filter formed by the
  • Ahmet UZUN on 14 Mar 12
     
    0-30 vdc stabılızed power supply wıth current control 0.002-3 a
Ahmet UZUN

Switching Regulators Using LM 2575 and LM 2577 - 0 views

www.uydudoktoru.com/...s-using-lm-2575-lm-2577-a.html

Switching Regulators Using LM 2575 and 2577

shared by Ahmet UZUN on 12 Sep 12 - No Cached
  • Switching regu*lators are available is different circuit configurations in*cluding the flyback, feed-forward, push-pull, and non-iso*lated single-ended or single-polarity types. Also, the switching regulators can operate in any of three modes – step-down, step-up, or polarity inverting. LM 2575 series of regulators developed by National Semiconductor are monolithic IC’s that provide the active functions for step-down (back) switching regulator, capable of driving a1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator. LM 2575 series offers a high-efficiency replacement for popular 3-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required. Fixed output voltage version is illustrated in figure. The National Semiconductor LM 1577/LM 2577 are monolithic ICs that provide all of the power and control functions for step-up (boost), fly back, and forward converter switching regulators. The device is available in three different output voltage versions: 12 V, 15 V and adjustable.
  • Ahmet UZUN on 12 Sep 12
     
    Switching Regulators Using LM 2575 and LM 2577
  • Ahmet UZUN on 12 Sep 12
     
    Switching Regulators Using LM 2575 and LM 2577
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