CZRFR52C27

Diodes - Zener - Single

The CZRFR52C27 is a single Zener diode designed specifically for reverse biased voltage regulation applications. It typically operates in a switched mode power supply as an active device with a continuous static load. The diode is electrically engineered to provide a very reliable low voltage reverse conduction. It features a low-leakage current, low on-state voltage drop and a low forward voltage drop. This diode can be mounted in various packages such as surface-mount and through-hole packages.

Functionality

The CZRFR52C27 Zener diode is typically used to provide a specified and consistent operating voltage for electronic circuits connected to its terminals. It also prevents voltage surges and protects against overvoltage. When the reverse voltage applied to the diode is equal to or higher than the diode’s threshold voltage (or “zener voltage”), the diode will operate in the “on” state and maintain the circuit’s operating voltage at the specified level. The CZRFR52C27 is designed to operate with a wide variety of typical and semiconductor circuit applications, such as voltage regulation and voltage-controlled switching. Though much more efficient than older low power diodes, they are still relatively inefficient compared to MOSFETs used in switched mode power supplies.

Advantages

The CZRFR52C27 Zener diode has many advantages over competing technologies. Most notably, the low voltage drop and low leakage current enable it to switch quickly and efficiently into and out of the reverse biased state, allowing for an efficient and sustained power output in many power supply applications. This diode also features a robust ESD rating to withstand high level electrostatic discharges, making it suitable for use in high voltage environments. Its low forward voltage drop also reduces the power lost in the diode as it passes current from anode to cathode.

Applications

The CZRFR52C27 Zener diode is suitable for a wide array of different power supply applications, including switched mode power supplies, AC adapter power supplies, battery power supplies, DC-to-DC converters, and more. It can also be used in a variety of other circuits, including voltage regulators, surge protectors, and audio amplifiers. Additionally, the diode can be used as an actiove current limiter to ensure that the regulated voltage stays within a specific range.

Working Principle

When the reverse voltage applied to the Zener diode exceeds the Zener voltage, the diode quickly switches into its “on” state. This is a dynamic operation, in which the reverse current flows like a normal diode until it reaches the Zener voltage. At this point, the reverse conduction path starts a chain reaction, producing a reverse current of electrons which prevent the voltage from rising further, regulating the voltage. The total current is equal to the forward current flowing from the anode to cathode. The diode continues to operate in the same manner until the reverse voltage is lastly removed.

In conclusion, the CZRFR52C27 Zener diode is designed for use in reverse biased voltage regulation applications. It features a low voltage drop, low leakage current, low forward voltage drop, and a robust ESD rating, making it suitable for a variety of power supply applications. The diode operates by quickly switching into its “on” state when the reverse voltage applied to it exceeds the Zener voltage, and dynamically regulating the output voltage.