2EZ17D2E3/TR12

2EZ17D2E3/TR12 application field and working principle

The 2EZ17D2E3/TR12 is a single Zener diode designed for general purpose applications. It is widely used in a variety of circuits, such as voltage regulators, voltage reference circuits in low-power applications, low-noise protection circuits and surge current protection circuits. The device is available in a wide range of voltageand power levels and has a wide operating temperature range.

Working Principle

The 2EZ17D2E3/ TR12 Zener diode is a semiconductor device that consists of two PN junction diodes connected in series in the opposite direction. When the diode is forward biased, current passes through the diode mostly as what is known as a “Zener current” (or reverse saturation current), but a small portion crosses the junction in the forward direction. The amount of current flowing through the diode increases with an increase in the applied forward voltage. At the Zener voltage, a tiny current passes through the diode, which causes an avalanche breakdown of the barrier.

When the Zener voltage is exceeded, the Zener current provides a bias of low resistance in the reverse direction, allowing a large current to flow through the diode, which can be drawn off to any desired circuitry. At higher power levels, this current may be used to regulate the voltage level of a power supply circuit. The Zener diode can be used to minimize power supply ripple, to protect other circuit elements from transient voltage transients, to reduce the voltage for a particular purpose, or to create a reference voltage in a circuit requiring precise control.

Applications

The 2EZ17D2E3/TR12 Zener diode can be used in a variety of electronic applications, including voltage regulators, voltage references, peak voltage detectors, overcurrent protection circuits, noise protection circuits and surge current protection circuits. It can also be used for the implementation of voltage converters, voltage clampers and precise voltage references.

The device is used extensively in consumer electronics and industrial applications, as its low cost and wide range of available power levels make it an ideal choice for many applications. Common examples include voltage regulation in portable devices, in battery operated circuit, and in other low power circuits.

In addition, the 2EZ17D2E3/TR12 Zener diode is used in transistor-based power supplies, where it functions as a current limiter in order to prevent excessive current flow. It is also used in LED lighting systems as a means of dimming the LED. In automotive applications, the device is used in combination with a free-wheel diode for increased protection against inductive loads and transients.

Finally, the diode is also used for surge protection, such as overvoltage protection of power supplies. In order to protect the power supply from sudden spikes in voltage and current, the diode rapidly shorts out the spike and thus prevents any damage to the power supply.