Control System Design for Power Converters
... © 2008 Microchip Technology Incorporated. All Rights Reserved. ...
... © 2008 Microchip Technology Incorporated. All Rights Reserved. ...
FDS6994S Dual SyncFet
... The FDS6994S is designed to replace two single SO-8 MOSFETs and Schottky diode in synchronous DC:DC power supplies that provide various peripheral voltages for notebook computers and other battery powered electronic devices. FDS6994S contains two unique 30V, N-channel, logic level, PowerTrench MOSFE ...
... The FDS6994S is designed to replace two single SO-8 MOSFETs and Schottky diode in synchronous DC:DC power supplies that provide various peripheral voltages for notebook computers and other battery powered electronic devices. FDS6994S contains two unique 30V, N-channel, logic level, PowerTrench MOSFE ...
pdf
... voltage output of the microphone, we use the “power supply” drain terminal of the microphone’s internal source-follower as the input to the processor. Our strategy allows us to regulate the drain output of the microphone to a reference voltage via negative feedback, and sense and amplify the microph ...
... voltage output of the microphone, we use the “power supply” drain terminal of the microphone’s internal source-follower as the input to the processor. Our strategy allows us to regulate the drain output of the microphone to a reference voltage via negative feedback, and sense and amplify the microph ...
MAX8576–MAX8579 3V to 28V Input, Low-Cost, Hysteretic Synchronous Step-Down Controllers General Description
... The MAX8576–MAX8579 synchronous PWM buck controllers use a hysteretic voltage-mode control algorithm to achieve a fast transient response without requiring loop compensation. The MAX8576/MAX8577 contain an internal LDO regulator allowing the controllers to function from only one 3V to 28V input supp ...
... The MAX8576–MAX8579 synchronous PWM buck controllers use a hysteretic voltage-mode control algorithm to achieve a fast transient response without requiring loop compensation. The MAX8576/MAX8577 contain an internal LDO regulator allowing the controllers to function from only one 3V to 28V input supp ...
Low-Power, Current Feedback Operational Amplifier With Disable
... output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation. The OPA684’s low 1.7mA supply current is precisely trimmed at 25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust desi ...
... output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation. The OPA684’s low 1.7mA supply current is precisely trimmed at 25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust desi ...
Prezentace aplikace PowerPoint
... Historically - damped resistor in opened delta secondary of VTs Experience showed, that damped resistor is effectively able to suppressed steady-state FR but, in some cases not its initial transition part. Modern automatic systems of remote control of substatios ( e.g.action as a response to earth f ...
... Historically - damped resistor in opened delta secondary of VTs Experience showed, that damped resistor is effectively able to suppressed steady-state FR but, in some cases not its initial transition part. Modern automatic systems of remote control of substatios ( e.g.action as a response to earth f ...
Joule`s heat generated during a short-circuit current flow in function
... These short-circuit times where deuced from experimental results and the 100º boundary can vary for other types of MCB. It can be seen that, similar as with short-circuit time, Joule's heat reaches lower values for higher phase angles up to 100º. With higher short-circuit times let-through energy ri ...
... These short-circuit times where deuced from experimental results and the 100º boundary can vary for other types of MCB. It can be seen that, similar as with short-circuit time, Joule's heat reaches lower values for higher phase angles up to 100º. With higher short-circuit times let-through energy ri ...
Experimental Results on a Wireless Wattmeter Device for the
... specifications for the current sensor are the radiometric linear output capability, output sensitivity 100 mV/1A (+/−20 A), adjustable bandwidth up to 80 kHz and low noise analog signal (maximum 92 mVpp for bandwidth of 80 kHz). 3.1.4. LV 25–400 Voltage Sensor The mains supply voltage is measured th ...
... specifications for the current sensor are the radiometric linear output capability, output sensitivity 100 mV/1A (+/−20 A), adjustable bandwidth up to 80 kHz and low noise analog signal (maximum 92 mVpp for bandwidth of 80 kHz). 3.1.4. LV 25–400 Voltage Sensor The mains supply voltage is measured th ...
PDF
... The overcurrent sensing, recloser sequencing and tripping shall be electronically controlled. The recloser shall be mechanically and electrically trip free. All three poles of the recloser shall be operated simultaneously by a solenoid-spring operating mechanism. The solenoid shall provide energy fo ...
... The overcurrent sensing, recloser sequencing and tripping shall be electronically controlled. The recloser shall be mechanically and electrically trip free. All three poles of the recloser shall be operated simultaneously by a solenoid-spring operating mechanism. The solenoid shall provide energy fo ...
How to Select the Right Temperature Sensor
... An improvement on the two-wire method is the three-wire method. Here again, a current is forced through the device and the resulting voltage is measured. However, a third wire provides compensation for the lead resistance. This requires either a three-wire compensating measurement unit or actually m ...
... An improvement on the two-wire method is the three-wire method. Here again, a current is forced through the device and the resulting voltage is measured. However, a third wire provides compensation for the lead resistance. This requires either a three-wire compensating measurement unit or actually m ...
Performance and Evaluation of 5MW Grid Connected Solar
... VI. DC-DC CONVERTER DC-DC converters can be used as switching mode regulators to convert an unregulated dc voltage to a regulated dc output voltage. The regulation is normally achieved by PWM at a fixed frequency and the switching device is generally BJT, MOSFET or IGBT. The minimum oscillator frequ ...
... VI. DC-DC CONVERTER DC-DC converters can be used as switching mode regulators to convert an unregulated dc voltage to a regulated dc output voltage. The regulation is normally achieved by PWM at a fixed frequency and the switching device is generally BJT, MOSFET or IGBT. The minimum oscillator frequ ...
TPS61054 数据资料 dataSheet 下载
... sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current. The 2-MHz switching frequency allows the use of small and low-profile 2.2-µH inductors. To optimize overall efficiency, the device operat ...
... sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current. The 2-MHz switching frequency allows the use of small and low-profile 2.2-µH inductors. To optimize overall efficiency, the device operat ...
CP-240 CP-260 CP
... WARRANTY SERVICE We will repair or replace the instrument during the warranty period provided it is returned to your nearest IDRC authorized service center. Buyer shall pri-pay shipment charges to service center and service center will pay shipment charges to return product to buyer. The freight pre ...
... WARRANTY SERVICE We will repair or replace the instrument during the warranty period provided it is returned to your nearest IDRC authorized service center. Buyer shall pri-pay shipment charges to service center and service center will pay shipment charges to return product to buyer. The freight pre ...
Measuring Technique
... (saturation area). This is caused primarily by the heating of the LED chip. This saturation effect is therefore less intense in pulsed operation than in DC operation. The reduction increases as the pulses become shorter and the duty cycle becomes longer. The luminous intensity under pulsed operation ...
... (saturation area). This is caused primarily by the heating of the LED chip. This saturation effect is therefore less intense in pulsed operation than in DC operation. The reduction increases as the pulses become shorter and the duty cycle becomes longer. The luminous intensity under pulsed operation ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.