CDBHM140L-HF

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Introduction

CDBHM140L-HF is a bridge rectifier device created by Central Semiconductor Corporation. Bridge rectifiers are devices that use a bridge configuration of diodes to convert AC voltage to DC voltage. This type of rectifier has become the go-to circuit to use when designing power supplies, charging systems or other circuits that require converting AC into DC. The CDBHM140L-HF is available in a standard 4-pin SOT-223 package and is suitable for medium power applications like choke input, interstage and step-up DC-DC converters, high frequency switching regulators and other automotive power management applications.

Design Theory

The CDBHM140L-HF is optimized for a low forward voltage drop, with a maximum rating of 1.10V @ 1.0A. The reverse voltage is rated at 150V and the total device dissipation is 0.65W. With its robust thermoplastic case, higher frequency operation of up to 50khz can be achieved without any issues. This rectifier is designed to have tight voltage and current regulation of +/- 5%, making it one of the more consistent rectifiers on the market.

Working Principle of the Bridge Rectifier

Bridge rectifiers consist of four diodes that are interconnected to create a bridge configuration, like a diamond. When an AC voltage source is applied, each of the diodes conducts during a different portion of the AC cycle. When the voltage across P-Q and R-S is negative, the two diodes in the bridge network close, allowing current to flow through the circuit in the forward direction. This makes a complete loop and the DC voltage is output.

Application Field

The CDBHM140L-HF bridge rectifier can be used in a variety of applications, making it an essential component for many industrial and electronics projects. Because it provides low forward voltage drop, it is ideal for power supplies, chargers and other applications where a conversion from AC to DC is necessary. It can also be used in motor controls, induction heating, high frequency switching regulators and other automotive power management applications. Additionally, the CDBHM140L-HF is suitable for use in choke input, interstage, step-up DC-DC converters, and other medium power applications.

Conclusion

The CDBHM140L-HF is a reliable and efficient bridge rectifier device suitable for a wide range of applications. Its low forward voltage drop, high reverse voltage and tight voltage and current regulation make it one of the best devices to use when converting AC to DC voltage. Furthermore, its thermoplastic case makes it perfect for higher frequency operation, up to 50khz, making it suited for high frequency switching power supplies and charging systems.

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