Maximum forward voltage = VF, usually specified at the diode's rated forward current. In reality, the forward voltage is described by the “diode equation.” Maximum (average) forward current = IF(AV), the maximum average amount of current the diode is able to conduct in forward bias mode.
What is a diode forward current?
Reverse-bias is when the anode is negative and the cathode is positive. A lot of current flows when the diode is forward-biased, provided that the voltage is higher than 0.6V or so for a silicon diode or 0.3V or so for a germanium device. A very small amount of current flows if a diode is reverse-biased.
Reverse leakage current in a semiconductor device is the current from that semiconductor device when the device is reverse biased. For constant temperature reverse current is almost constant though applied reverse voltage is increased up to certain limit. Hence it is also called as reverse saturation current.
The forward current of an LED, IF, is the current which flows across the LED's leads, from anode to cathode, in order for the LED to receive sufficient current to power on. As you can see above, positive voltage must be applied across the LED from its anode to its cathode.
Glossary Term: Reverse Recovery Time. Definition. When switching from the conducting to the blocking state, a diode or rectifier has stored charge that must first be discharged before the diode blocks reverse current. This discharge takes a finite amount of time known as the Reverse Recovery Time, or trr.
In electrical engineering and mechanical engineering, the power rating of equipment is the highest power input allowed to flow through particular equipment. According to the particular discipline, the term "power" may refer to the electrical or mechanical power.
forward recovery time. [¦fȯr·w?rd ri′k?v·?·rē ‚tīm] (electronics) Of a semiconductor diode, the time required for the forward current or voltage to reach a specified value after instantaneous application of a forward bias in a given circuit.
For rectifier applications, peak inverse voltage (PIV) or peak reverse voltage (PRV) is the maximum value of reverse voltage which occurs at the peak of the input cycle when the diode is reverse-biased. The portion of the sinusoidal waveform which repeats or duplicates itself is known as the cycle.
Definition. Peak Inverse Voltage (PIV) or Peak Reverse Voltage (PRV) refer to the maximum voltage a diode or other device can withstand in the reverse-biased direction before breakdown. Also may be called Reverse Breakdown Voltage.
VRRM is the maximum allowable repetitive instantaneous value of the diode's reverse voltage. These transients are the result of circuit and diode properties and are somewhat under the con- trol of the system designer. The key word is “repetitive.”
An ideal diode is a diode that acts like a perfect conductor when voltage is applied forward biased and like a perfect insulator when voltage is applied reverse biased. So when positive voltage is applied across the anode to the cathode, the diode conducts forward current instantly.
n is the ideality factor, also known as the quality factor or sometimes emission coefficient. The equation is called the Shockley ideal diode equation when n, the ideality factor, is set equal to 1.
The reverse voltage is the voltage drop across the diode if the voltage at the cathode is more positive than the voltage at the anode (if you connect + to the cathode). This is usually much higher than the forward voltage. As with forward voltage, a current will flow if the connected voltage exceeds this value.
Inrush current is the instantaneous high input current drawn by a power supply or electrical equipment at turn-on. This arises due to the high initial currents required to charge the capacitors and inductors or transformers. The inrush current is also known as the switch–on surge, or the input surge current.
Silicon diodes have a forward voltage of approximately 0.7 volts. Germanium diodes have a forward voltage of approximately 0.3 volts. The maximum reverse-bias voltage that a diode can withstand without “breaking down” is called the Peak Inverse Voltage, or PIV rating.
A diode is reverse-biased when the positive (red) test lead is on the cathode and the negative (black) test lead is on the anode. The reverse-biased resistance of a good diode displays OL on a multimeter. The diode is bad if readings are the same in both directions.
Blocking voltage, BVDSS, is the maximum voltage that can be applied to the MOSFET. When driving an inductive load, this includes the applied voltage plus any inductively induced voltage. With inductive loads, the voltage across the MOSFET can actually be twice the applied voltage.
With no gate signal applied, peak reverse blocking voltage is the maximum reverse voltage that can be applied to the anode without causing reverse anode current in excess of the specified maximum. Peak reverse blocking voltage is equal to peak forward blocking voltage but of opposite polarity.
A power semiconductor device is a semiconductor device used as a switch or rectifier in power electronics; a switch-mode power supply is an example. Such a device is also called a power device or, when used in an integrated circuit, a power IC.
switching speed (toggling speed) A measure of the rate at which a given electronic logic device is capable of changing the logic state of its output in response to changes at its input. It is a function of the delay encountered within the device, which in turn is a function of the device technology. "switching speed."