HFC0100HS-LF

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HFC0100HS-LF Application Field and Working Principle

HFC0100HS-LF is a highly efficient, low cost offline switching power supply with up to 60V continuous-conduction input and up to 20V output voltage and up to 2A output current. HFC0100HS-LF is suitable for consumer products and consumer electronics.

The HFC0100HS-LF is mainly used to provide low input voltage isolation, high efficiency, and other desirable features in AC DC converters and offline switchers.

Working Principle

The HFC0100HS-LF consists of a full-bridge forward topology with an integrated planar transformer. The output voltage of the forward converter is set by a voltage mode control loop with spread spectrum frequency regulation. The feedback loop consists of current-mode control and linear regulation.

The HFC0100HS-LF is based on a full-bridge power topology, meaning that a pair of switches is employed to bridge the input power from the AC line or the rectified DC supply to the load. The HFC0100HS-LF consists of a primary side that includes a full-bridge rectifier, a planar transformer, and a synchronous rectifier, and a secondary side that contains an inverter, a synchronous rectifier, and a voltage regulator.

The primary side of the HFC0100HS-LF switches at a constant frequency, while the secondary side operates at a variable frequency, depending on the load. By regulating the frequency, the power is transferred more efficiently, and the output voltage can be accurately regulated. The linear regulator is used to compensate for changes in the ac line voltage and to limit the output voltage in case of overload or short-circuit.

The HFC0100HS-LF utilizes voltage mode control with spread spectrum frequency regulation to minimize conducted EMI/RFI, minimize line load variations, and reduce component stress.

Advantages

The main advantages of the HFC0100HS-LF are its high efficiency, small size, low cost, good noise immunity, and superior stability and reliability.

The HFC0100HS-LF offers a wide range of input voltages, from 30 to 60V, allowing it to operate from either a single-phase supply or a 3-phase supply. It also has a wide output voltage range, from 0 to 20V, with current capability up to 2A, enabling it to be used in a variety of applications.

In addition, the HFC0100HS-LF features an integrated voltage mode PWM controller and a switch mode synchronous rectifier in a small 8-pin SMD package, offering a low component count and small board size.

The HFC0100HS-LF also has superior noise immunity, due to its spread spectrum frequency operation, and superior stability and reliability due to its voltage mode control loop. This makes it suitable for use in a variety of consumer products where low noise is required.

Conclusion

The HFC0100HS-LF is a highly efficient, low cost, and reliable offline switching power supply, perfect for AC DC converters and offline switchers. It has wide input voltage and output voltage ranges, good noise immunity, and high efficiency and delivers excellent stability and reliability.

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