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Diodes - Rectifiers - Arrays

VS-81CNQ040ASMPBF is a diode rectifier array with high voltage levels and four common cathode diode configurations. This package is available in a TO-252AC type plastic package, which is commonly used for power semiconductor devices. The package is available in two different molds, one with a body or the other with a top. The top design allows for heavier load current capabilities compared to the body designs.

The VS-81CNQ040ASMPBF consist of four in-series Schottky diodes connected in a common cathode configuration. The diodes have a forward voltage drop of about 1.15V and a low forward leakage current. The maximum peak reverse voltage (VRM) of this diode array is 80 volts, can which provide very efficient rectification in applications such as high frequency converters and switching power supplies. The reverse recovery of the diode array is very fast, making it suitable for high-speed switching applications.

The VS-81CNQ040ASMPBF diode rectifier array has a high surge current capability up to 5A, allowing for high power rectification in several applications. It is depending on the operating temperature, the maximum repetitive reverse voltage is 61V. The maximum power dissipation in the same temperature is 1.0W for the top molded versions and 1.4W for the body molded versions.

Application Field

The high voltage capabilities and good surge current ratings of VS-81CNQ040ASMPBF provides a very flexible and cost effective solution for applications such as:

• AC receptacle with EMI/RFI filters.
• High frequency converters such as DC/DC converters.
• AC/DC incorporation in computers and peripherals.
• Robotic parts and other electronic components.
• Solar battery or power management systems.
• Household and industrial lighting systems.
• Uninterruptible power supplies (UPS).

Working Principle

The VS-81CNQ040ASMPBF diode rectifier array contains four common cathode Schottky rectifiers in series. The anode of each diode is connected at each common node, while the cathode of each diode is connected to the common supply rail. When the circuit is forward biased, the voltage drop across each diode is about 1.15V. This means that when the total forward voltage of the circuit exceeds 4.6V (1.15V x 4), the circuit will start to conduct and the current will flow as long as the voltage is applied.

When the circuit is loaded, the diode array will present a resistance against the flow of current and voltage will drop. This drop in voltage is known as the forward voltage drop of the diode array. In order to maintain a specified operating voltage, a resistor may be placed in parallel with the diode array. The resistance value of the resistor should be selected such that enough voltage is dropped to maintain the specified operating voltage.

When the circuit is reverse biased, the diode array will block the flow of current and prevent the backflow of current. The VS-81CNQ040ASMPBF diode rectifier array provides a very efficient reverse blocking capability, with a maximum reverse voltage rating of 80V. The reverse recovery time of the diode array is very fast, making it suitable for high-speed switching applications.

Conclusion

The VS-81CNQ040ASMPBF diode rectifier array provides high voltage and surge current capabilities, making it very suitable in a wide range of applications. Due to it\'s low forward voltage drop, fast reverse recovery and high surge current capabilities, these diode rectifier array is a very cost effective solution for high power rectification.

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