Physics Tutorial: Inductance and Transformers
... Transformers allow 240V to be stepped down to convenient levels for digital electronics (only a few volts) or for other low power applications (typically 12V). Transformers step the voltage up for transmission, as mentioned above, and down for safe distribution. Without transformers, the waste of el ...
... Transformers allow 240V to be stepped down to convenient levels for digital electronics (only a few volts) or for other low power applications (typically 12V). Transformers step the voltage up for transmission, as mentioned above, and down for safe distribution. Without transformers, the waste of el ...
design of low emi power supply using resonant converter
... When Q1 is ON, and Q2 is OFF, resonant capacitor charged up to Vs. First switch Q1 is turned OFF. Transformer magnetizing current continuous to flow through capacitor (C2). Both diodes which across the switches, latch in, which provides a short circuit across the secondary and hence across the prima ...
... When Q1 is ON, and Q2 is OFF, resonant capacitor charged up to Vs. First switch Q1 is turned OFF. Transformer magnetizing current continuous to flow through capacitor (C2). Both diodes which across the switches, latch in, which provides a short circuit across the secondary and hence across the prima ...
BP5718A12
... The capacitance of C3 should be 10µF, since an excessively small value will result in malfunction. The activation time is defined as: t(sec)=R2�C3�ln[1-17/(VI-30µA�R2)], where VI is the DC voltage after smoothing. The resistance of R2 should be 1.5MΩ, since an excessively small value will result in ...
... The capacitance of C3 should be 10µF, since an excessively small value will result in malfunction. The activation time is defined as: t(sec)=R2�C3�ln[1-17/(VI-30µA�R2)], where VI is the DC voltage after smoothing. The resistance of R2 should be 1.5MΩ, since an excessively small value will result in ...
Solving high-voltage off-line HB-LED constant-current control
... When VIFB is below VIFBTH, the MOSFET is on, powering the HB-LED string from the DC bus. Simultaneously, the LC resonant circuit stores energy while VIFB increases. When VIFB reaches the threshold VIFBTH, the MOSFET turns off after the circuit’s intrinsic fixed-time delay. The delay allows VIFB to i ...
... When VIFB is below VIFBTH, the MOSFET is on, powering the HB-LED string from the DC bus. Simultaneously, the LC resonant circuit stores energy while VIFB increases. When VIFB reaches the threshold VIFBTH, the MOSFET turns off after the circuit’s intrinsic fixed-time delay. The delay allows VIFB to i ...
Surge Protected Double Adaptor
... A power surge or spike can travel on active, neutral or earth and cause costly irreparable damage to your electrical equipment. The Arlec surge protected double adaptor is suitable for protecting valuable computer hardware, electrical equipment and domestic appliances in the home or commercial situa ...
... A power surge or spike can travel on active, neutral or earth and cause costly irreparable damage to your electrical equipment. The Arlec surge protected double adaptor is suitable for protecting valuable computer hardware, electrical equipment and domestic appliances in the home or commercial situa ...
QuickWriter™ Target Voltage Enable Signal (TVDDEN)
... To enable full automation of in-circuit programming, without violating programming specs, we added a new control signal to QuickWriter called TVDDEN. TVDDEN can be used to control your target's power supply (through an appropriate driver circuit). QuickWriter’s TVDDEN signal will help automate contr ...
... To enable full automation of in-circuit programming, without violating programming specs, we added a new control signal to QuickWriter called TVDDEN. TVDDEN can be used to control your target's power supply (through an appropriate driver circuit). QuickWriter’s TVDDEN signal will help automate contr ...
MDS-100BPS12 B Datasheet
... Inrush current is the input current that occurs when the input voltage is first applied. For AC input voltages, the maximum peak value of inrush current will occur during the first half cycle of the applied AC voltage. This peak value decreases exponentially during subsequent cycles of AC voltage. ...
... Inrush current is the input current that occurs when the input voltage is first applied. For AC input voltages, the maximum peak value of inrush current will occur during the first half cycle of the applied AC voltage. This peak value decreases exponentially during subsequent cycles of AC voltage. ...
Prosine 1800.indd - Advantage Solar Wholesale Solar Dealer Supply
... With less than 3% total harmonic distortion, the Prosine 1800 delivers true sine wave output that is identical (in some cases better than) AC power supplied by your utility. This clean output makes Prosine inverters ideal for handling sensitive loads and for improved AC equipment performance. Expect ...
... With less than 3% total harmonic distortion, the Prosine 1800 delivers true sine wave output that is identical (in some cases better than) AC power supplied by your utility. This clean output makes Prosine inverters ideal for handling sensitive loads and for improved AC equipment performance. Expect ...
Power Supply for Crookes Tube (Model N99-B10
... turned to the extreme left and it gradually increases as the dial is turned to the right. ...
... turned to the extreme left and it gradually increases as the dial is turned to the right. ...
Do now! - MrSimonPorter
... Why do we need transformers? Keeping the current low means electricity can be transported long distances without losing too much energy. ...
... Why do we need transformers? Keeping the current low means electricity can be transported long distances without losing too much energy. ...
Document
... and explained through an average behavioral model and state-plane analysis. The operation of the controller is experimentally verified on a 12W 12V-to-1.5V converter, demonstrating voltage-mode control operation as well as time-optimal response for load transients. Existing system: In recent years ...
... and explained through an average behavioral model and state-plane analysis. The operation of the controller is experimentally verified on a 12W 12V-to-1.5V converter, demonstrating voltage-mode control operation as well as time-optimal response for load transients. Existing system: In recent years ...
Physics 1.3 - Resistance
... In an Ohm’s law experiment, the voltage across a resistor was measured at the same time as the current through it. The results are shown in the chart. Voltage (V) ...
... In an Ohm’s law experiment, the voltage across a resistor was measured at the same time as the current through it. The results are shown in the chart. Voltage (V) ...
Constant Current Power Supplies
... from a voltage driver. The pass transistor operates as an emitter follower with a voltage gain of unity. Both the DC power source and transistor can be replaced by a single op amp which has a DC output capability equal to the combination. The resulting circuit can be redrawn in the form of a simple ...
... from a voltage driver. The pass transistor operates as an emitter follower with a voltage gain of unity. Both the DC power source and transistor can be replaced by a single op amp which has a DC output capability equal to the combination. The resulting circuit can be redrawn in the form of a simple ...
Switched-mode power supply
A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.