Current To Frequency Converters

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  • 72V Hybrid DC/DC Reduces Intermediate Bus Converter Size by Up to 50%
    switching frequency without compromising efficiency. Alternatively, the converter can operate with 3% higher efficiency in a footprint comparable to existing solutions. ADI's new hybrid converter architecture also provides other benefits that include soft switching for reduced EMI and MOSFET stress
  • Paralleling the TC1121 to Reduce Output Resistance for Driving Higher Load Currents (TC1121)
    Microchip Technology's TC1121 is a charge pump voltage converter specified to have a 100mA output current capability. The TC1121 has the benefits of selecting different internal charge pump switching frequencies (10KHz or 200KHz), driving the charge pump from an external clock, and a low power
  • Design Considerations to Increase Power Density in Welding Machines Converters Using TRENCHSTOP(TM)5 IGBT
    The demand for portable low cost welding machines, especially in developing countries, is increasing. In the Manual Metal Arc and Tungsten Inergt Gas types, in power range from 1,5kW up to 5kW, discrete IGBTs and MOSFETs are broadly used. Mostly, these machines use hard switching current mode PWM
  • The Evolution of Switched Capacitor Backlight Drivers in Mobile Phones
    of drivers used for LED backlighting: inductive boost converters or charge pumps. To ensure equal brightness of each LED, designers either put all LEDs in series and drive them with a constant current boost converter, or use a switched capacitor charge pump with individual current control for each
  • Applying the TC1219/TC1220 Inverting Charge Pumps with Small External Capacitor Values
    Microchip Technology Inc.'s TC1219 (switching frequency at 12 kHz) and TC1220 (switching frequency at 35 kHz) are inverting charge pump voltage converters that are specified using rather large capacitors (10 µF for the TC1219 and 3.3 µF for the TC1220). These capacitor sizes allow the designer
  • TC7109 Records Remote Data Automatically
    A Microchip Technology analog-to-digital converter, a 2K-byte CMOS static RAM, and some gates and counters can be combined to form a low-cost, flexible, standalone data logging system. All the ICs are CMOS and the clock frequency is low, so power supply current is only a couple of milliamperes
  • Harmonics and IEEE Std 519
    years as the use of Variable Frequency Drives and other non-linear loads has grown. Two of the more difficult aspects of applying IEEE Std 519 are (i) determining an appropriate point of common coupling (PCC) and (ii) establishing a demand current at the design stage. This is because the standard
  • Design and Development of Medical Electronic Instrumentation
    to perform volume-conductor experiments with a voltage-to-current converter. and physical models of the body. In Chapter 7 we look at the principles and clinical applications of electrical stimulation. of excitable tissues. Projects include the design of stimulation circuits for implantable. pulse

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