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Understanding Boost Power Stages in Switchmode Power Supplies
Understanding Boost Power Stages in Switchmode Power Supplies

FPD750 0.5W POWER pHEMT Features Product Description
FPD750 0.5W POWER pHEMT Features Product Description

... responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change comp ...
LTC5507 - 100kHz to 1GHz RF Power Detector.
LTC5507 - 100kHz to 1GHz RF Power Detector.

... which is referenced to VCC. C2 is the peak detector capacitor connected between PCAP and VCC. The value of C2 will affect the slew rate and bandwidth. Typically C1 can equal C2. Ceramic capacitors are recommended for C1 and C2. The values for C1 and C2 are dependent on the operating RF frequency. Th ...
Barriers
Barriers

... • While the voltage difference between the circuits is limited in Zener barriers, the voltage difference between the circuits and grounding is unlimited. When a short-circuit occurs between the circuits and ground, high voltage/current may be generated in the circuits, causing a possible explosion. ...
277 Volts to your Server? - Engineered Systems Magazine
277 Volts to your Server? - Engineered Systems Magazine

... Presently, most server power supplies in North America operate at 208V. Several strategies have been developed to increase the efficiency of the data center such as operating data centers at 400Y230V. However, many “legacy” North American computers / servers are not designed to operate at voltages h ...
User Manual VME64x 7U
User Manual VME64x 7U

What is LDO (Low-Dropout Voltage Regulator) 2006/6  John Wu 吳旻翰
What is LDO (Low-Dropout Voltage Regulator) 2006/6 John Wu 吳旻翰

LV8136V - ONSemi
LV8136V - ONSemi

... Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature ch ...
AN1889
AN1889

... The need to choose a high value of the fly-back voltage is well known to power supply designers when efficiency and high duty cycle become important requirements. Threephase auxiliary power supplies, starting from a bulk voltage of 750 V, require theoretically power transistors with a block voltage ...
FEATURES FUNCTIONAL BLOCK DIAGRAM
FEATURES FUNCTIONAL BLOCK DIAGRAM

... full-scale output current of up to 300 mA. The full-scale output current is set with two external sense resistors. The output compliance voltage is 2.5 V, even at output currents up to 300 mA. The device is particularly suited for tunable laser control and can drive tunable laser front mirror, back ...
Lecture_AC_Circuits
Lecture_AC_Circuits

... Analysis of Balanced 3f Systems If a three-phase power system is balanced, it is possible to determine voltages and currents at various points in the circuit with a per phase equivalent circuit. • Neutral wire can be inserted, as no current would be flowing through it, thus, system is not affected. ...
Naim Discrete Regulator - English
Naim Discrete Regulator - English

... Regulator is shown in the block diagram of Figure 1. A regulator circuit of almost this form was first used in the NAP 500 power supply, since when the concept has been further refined by incorporating an enhanced voltage reference. This topology, which was benchmarked against various alternatives a ...
Current-Limited, Power-Distribution Switches
Current-Limited, Power-Distribution Switches

... to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to p ...
university of california
university of california

... Measure the gain for both followers near 1V output, and near the highest output voltage that they both can reach. (Your scope has several fancy tools to help you measure the gains, so try to be accurate) The resistively loaded CD is a pretty lousy follower. Show your TA your two traces and gain esti ...
Tripp Lite SMART1500RMXL2UA Datasheet
Tripp Lite SMART1500RMXL2UA Datasheet

... Tripp Lite's SMART 1500RMXL2Ua intelligent, line interactive rack/tower uninterruptible power supply prevents data loss, downtime and equipment damage due to power outages, voltage fluctuations and transient surges. Requires only two rack spaces (2U) in a standard rack enclosure. Large internal batt ...
Vacancy Sensing MicroSet Ultrasonic Low Voltage Specification Sheet
Vacancy Sensing MicroSet Ultrasonic Low Voltage Specification Sheet

FINAL POWER AMPLIFIER OVERVIEW FUNCTIONAL
FINAL POWER AMPLIFIER OVERVIEW FUNCTIONAL

... they are not redundant since both amplifiers are used during tactical operation. If one amplifier is in a fault condition, however, it is possible for the Transmitter Group to operate with the remaining FPA at a reduced power output (3 db down). Medium level RF from the on-line Driver is split equal ...
Transient Voltage Suppressors SA5V0(C)A - SA170(C)A
Transient Voltage Suppressors SA5V0(C)A - SA170(C)A

... .375 " lead length @ TA = 75°C Non-repetitive Peak Forward Surge Current superimposed on rated load (JEDEC method) Storage Temperature Range ...
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PDF

Chapter 8 RADIO FREQUENCY SYSTEM
Chapter 8 RADIO FREQUENCY SYSTEM

Naim Discrete Regulator
Naim Discrete Regulator

... The simplified circuit topology of the Naim Discrete Regulator is shown in the block diagram below. A regulator circuit of almost this form was first used in the NAP 500 power supply, since when the concept has been further refined by incorporating an enhanced voltage reference. This topology, which ...
PDF
PDF

... transformerlessinverter topologies were proposed [9]– [11]. Even though they can achieve high efficiency, they require more components than the conventional fullbridge topology. Thus, in this study, the bidirectional full-bridge inverter is operated with bipolar modulation to avoid leakage ground cu ...
PDF
PDF

Physical Layer
Physical Layer

... line, has an artificially introduced cutoff frequency near 3000 Hz. This restriction means that the number of the highest harmonic passed through is 24000/b, roughly (the cutoff is not sharp). For some commonly used data rates, the numbers work ...
A Closed-Loop, Wideband, 100A Active Load
A Closed-Loop, Wideband, 100A Active Load

... control voltage and the current sense resistor over a very wide bandwidth. Note that once A1 is biased to Q1’s conduction threshold (by the “DC Load Set”), small variations in A1’s output result in large Q1 channel current changes. As such, large output excursions are not required from A1; its small ...
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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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