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CD214A-B120LLF – Rectifier Diodes

Introduction

A rectifier diode is an electronic component that can switch between a low electrical resistance (on-state) and a high electrical resistance (off-state). Rectifiers are used in electronics to convert alternating currents (AC) into direct currents (DC), a process known as rectification. The most common rectifier diode is the CD214A-B120LLF, an epitaxial, planar rectifier diode most commonly found in power supplies, switched mode power supplies (SMPS) and battery chargers. It is a single rectifier diode with a low forward voltage drop and high peak inverted voltage. In this article, the application fields and working principle of the CD214A-B120LLF will be discussed.

Application Fields

The CD214A-B120LLF is primarily used in high-frequency switching applications. It is a popular choice for creating high-power DC-DC converters, AC-DC rectifiers, power supplies and battery chargers due to its low forward voltage drop and low reverse leakage current. It is also commonly used in automotive systems for battery charging and in communications and data processing equipment such as modems and routers.

Working Principle

The CD214A-B120LLF is a single rectifier diode with the following electrical characteristics:

• Voltage Drop: Vf = 0.83V maximum
• Reverse Leakage Current: Ir = 1.5mA maximum
• Forward Surge Current Non-Repetitive: Ifsm = 115A
• Maximum Reverse Repetitive Peak Voltage: VRRM = 800V
• Maximum Average Rectified Forward Current: I (AV) = 120A
• Capacitance between Terminals: C = 1.6pF

The CD214A-B120LLF works by allowing the current to flow through the diode in one direction (forward), while blocking the current in the opposite direction (reverse). The voltage drop of the diode is a measure of the amount of power that is lost in the process. The reverse leakage current is a measure of how much current is allowed to flow in the reverse direction. The forward surge current is a measure of the maximum current that can be passed through the diode in the forward direction. The reverse repetitive peak voltage is the maximum amount of voltage that can be applied to the diode in the reverse direction.

Conclusion

In conclusion, the CD214A-B120LLF is a popular choice for applications that require a single rectifier diode with a low forward voltage drop and low reverse leakage current. It is used in a variety of electronic devices such as DC-DC converters, AC-DC rectifiers, power supplies and battery chargers. Its working principle is based on the idea of allowing current to flow through the diode in one direction, while blocking the current in the opposite direction. The voltage drop, reverse leakage current, forward surge current and reverse repetitive peak voltage are all important electrical characteristics of the CD214A-B120LLF that define its performance.

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