PESC05_Full_Bridge - Faculdade de Engenharia
... This paper described single stage high power factor electronic ballast for high pressure sodium lamps. This ballast presents a very low cost because it avoids an external PFP. The phenomenon of the acoustic resonance was not observed. A very high power factor was obtained. The crest factor found was ...
... This paper described single stage high power factor electronic ballast for high pressure sodium lamps. This ballast presents a very low cost because it avoids an external PFP. The phenomenon of the acoustic resonance was not observed. A very high power factor was obtained. The crest factor found was ...
NCL30081LEDGEVB 3.6 W Flyback 3 LED Step Dimmable Driver Evaluation Board User's Manual
... resistor will also have some effect on the output current. Since the input power is < 5 W maximum, this falls below the level where power factor or harmonic current requirements are applicable in many countries (e.g. US). In the EU, the harmonic current requirements for IEC61000-3-2 Class C are appl ...
... resistor will also have some effect on the output current. Since the input power is < 5 W maximum, this falls below the level where power factor or harmonic current requirements are applicable in many countries (e.g. US). In the EU, the harmonic current requirements for IEC61000-3-2 Class C are appl ...
Tunable Sensors for Process-Aware Voltage Scaling
... Default config. • Low resistance passgates • Guardband for worst-case • Vmin_est > Vmin_chip • 13mV margin ...
... Default config. • Low resistance passgates • Guardband for worst-case • Vmin_est > Vmin_chip • 13mV margin ...
MULTIPLE RS-232 DRIVERS AND RECEIVERS
... See Figure 4 † All typical values are at TA = 25°C, VCC = 5 V, VDD = 9 V, and VSS = – 9 V. ...
... See Figure 4 † All typical values are at TA = 25°C, VCC = 5 V, VDD = 9 V, and VSS = – 9 V. ...
8-Bit Analog-to-Digital Converters With Serial
... can be completed in 17 µs or less, while complete input-conversion-output cycles can be repeated in 22 µs for the TLC548 and in 25 µs for the TLC549. The internal system clock and I/O CLOCK are used independently and do not require any special speed or phase relationships between them. This independ ...
... can be completed in 17 µs or less, while complete input-conversion-output cycles can be repeated in 22 µs for the TLC548 and in 25 µs for the TLC549. The internal system clock and I/O CLOCK are used independently and do not require any special speed or phase relationships between them. This independ ...
DC Motor Drives
... • Say the motor running at position A. Suddenly va is reduced (below eg). The current ia will reverse direction. Operating point is shifted to B. • Since ia is negative, torque Te is negative. • Power is also negative, which implies power is “generated” back to the supply. • In other words, during ...
... • Say the motor running at position A. Suddenly va is reduced (below eg). The current ia will reverse direction. Operating point is shifted to B. • Since ia is negative, torque Te is negative. • Power is also negative, which implies power is “generated” back to the supply. • In other words, during ...
Chapter 4 Re-VIEW
... power supply is linked to the motherboard and the computer case. These three hardware components are specified and matched by form factors. Major form factors for the motherboard are presented in historical context, with greatest emphasis on the ATX form factor. Three important computer cases are al ...
... power supply is linked to the motherboard and the computer case. These three hardware components are specified and matched by form factors. Major form factors for the motherboard are presented in historical context, with greatest emphasis on the ATX form factor. Three important computer cases are al ...
HMC440QS16G 数据资料DataSheet下载
... The 5-Bit programmable counter counts-down from the programmed value of the data bits to zero and issues an output pulse at the end of each cycle. Settling time of the programmable 5-Bit counter is defined as the maximum time required for the counter to change the division ratio N to a new value aft ...
... The 5-Bit programmable counter counts-down from the programmed value of the data bits to zero and issues an output pulse at the end of each cycle. Settling time of the programmable 5-Bit counter is defined as the maximum time required for the counter to change the division ratio N to a new value aft ...
Question Bank
... C) High selectivity D) All of the above 37. When an op-amp is operated in common mode fashion, CMRR should be ---A) Zero B) infinitely high C) very small D) 5db 38. The emitter coupled pair of BJT’s given a linear transfer relation between the differential Output voltage and the differential input v ...
... C) High selectivity D) All of the above 37. When an op-amp is operated in common mode fashion, CMRR should be ---A) Zero B) infinitely high C) very small D) 5db 38. The emitter coupled pair of BJT’s given a linear transfer relation between the differential Output voltage and the differential input v ...
MAX6977 8-Port, 5.5V Constant-Current LED Driver with LED Fault Detection General Description
... into the MAX6977 8-bit shift register on its rising edge. LE is the load input of the MAX6977 latch, which transfers data from the MAX6977 8-bit shift register to its 8bit latch when LE is a high (transparent latch), and latches the data on the LE falling edge of LE (Figure 2). The rising edge of LE ...
... into the MAX6977 8-bit shift register on its rising edge. LE is the load input of the MAX6977 latch, which transfers data from the MAX6977 8-bit shift register to its 8bit latch when LE is a high (transparent latch), and latches the data on the LE falling edge of LE (Figure 2). The rising edge of LE ...
P3.4.5.1 - LD Didactic
... The setup b) in Fig. 4, i.e. the autotransformer, is a different type of transformer where electrical isolation does not occur because of a part of the windings on one core forms the primary and secondary coil at the same time. For this reason the transformer is also called one-coil transformer. Thi ...
... The setup b) in Fig. 4, i.e. the autotransformer, is a different type of transformer where electrical isolation does not occur because of a part of the windings on one core forms the primary and secondary coil at the same time. For this reason the transformer is also called one-coil transformer. Thi ...
MAX4789–MAX4794 200mA/250mA/300mA Current-Limit Switches General Description Features
... Reverse Current Protection The MAX4789–MAX4794 limit the reverse current (VOUT to VIN) from exceeding the maximum IREV value. The switch is shut off and FLAG is asserted (MAX4789/ MAX4791/MAX4793) if the reverse current-limit condition persists for more than the blanking time. This feature prevents ...
... Reverse Current Protection The MAX4789–MAX4794 limit the reverse current (VOUT to VIN) from exceeding the maximum IREV value. The switch is shut off and FLAG is asserted (MAX4789/ MAX4791/MAX4793) if the reverse current-limit condition persists for more than the blanking time. This feature prevents ...
a Ultralow Noise, High Speed, BiFET Op Amp AD745
... frequency noise. Therefore, sensitive circuitry should be well shielded from air flow. Keeping absolute chip temperature low also reduces low frequency noise in two ways: first, the low frequency noise is strongly dependent on the ambient temperature and increases above 25°C. Second, since the gradi ...
... frequency noise. Therefore, sensitive circuitry should be well shielded from air flow. Keeping absolute chip temperature low also reduces low frequency noise in two ways: first, the low frequency noise is strongly dependent on the ambient temperature and increases above 25°C. Second, since the gradi ...
AT4K 2500 Watt Antenna Tuner AT4K 2500 Watt Antenna
... transformer in the input of the network. When the network is properly tuned, a 50 Ohm impedance will be presented to both the input and output of the balun for maximum efficiency. ...
... transformer in the input of the network. When the network is properly tuned, a 50 Ohm impedance will be presented to both the input and output of the balun for maximum efficiency. ...
CMOS Micromechanical Resonator Oscillator
... utilizing surface-micromachined polysilicon mechanical resonators have been designed, fabricated, and tested with particular attention to amplitude control and phase noise performance. Due to the novelty of the process and the devices, conservative measures were taken for the designs, and oscillator ...
... utilizing surface-micromachined polysilicon mechanical resonators have been designed, fabricated, and tested with particular attention to amplitude control and phase noise performance. Due to the novelty of the process and the devices, conservative measures were taken for the designs, and oscillator ...
OP1177
... available in tape and reel only. The OPx177 family offers the widest specified temperature range of any high precision amplifier in surface-mount packaging. All versions are fully specified for operation from −40°C to +125°C for the most demanding operating environments. Applications for these ampli ...
... available in tape and reel only. The OPx177 family offers the widest specified temperature range of any high precision amplifier in surface-mount packaging. All versions are fully specified for operation from −40°C to +125°C for the most demanding operating environments. Applications for these ampli ...
MAX5951 12V/5V Input Buck PWM Controller General Description Features
... PGND together at one point near the input bypass capacitor return terminal. Synchronization Output. SYNCOUT is a synchronization signal to drive the SYNCIN of a second MAX5950 or MAX5951, if used. Leave SYNCOUT unconnected when not used. Synchronization Input. SYNCIN accepts the SYNCOUT from another ...
... PGND together at one point near the input bypass capacitor return terminal. Synchronization Output. SYNCOUT is a synchronization signal to drive the SYNCIN of a second MAX5950 or MAX5951, if used. Leave SYNCOUT unconnected when not used. Synchronization Input. SYNCIN accepts the SYNCOUT from another ...
Power electronics
Power electronics is the application of solid-state electronics to the control and conversion of electric power. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, time-varying energy-processing electronic systems with fast dynamics.The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes, thyristors and transistors, pioneered by R. D. Middlebrook and others beginning in the 1950s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. An AC/DC converter (rectifier) is the most typical power electronics device found in many consumer electronic devices, e.g. television sets, personal computers, battery chargers, etc. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive (VSD) that is used to control an induction motor. The power range of VSDs start from a few hundred watts and end at tens of megawatts.The power conversion systems can be classified according to the type of the input and output power AC to DC (rectifier) DC to AC (inverter) DC to DC (DC-to-DC converter) AC to AC (AC-to-AC converter)