LM2574HVN-5.0/NOPB

The LM2574HVN-5.0/NOPB is a monolithic step-down switching regulator. It provides the lowest cost commercial solution for switching regulators with high current output current at 5A and greater. The chip is designed to be user-friendly, offering adjustable output voltage, low ripple and low noise. The LM2574HVN-5.0/NOPB has a low cost, high efficiency, and a wide input voltage range. It’s a versatile solution for many different applications.

Application fields

The LM2574HVN-5.0/NOPB is suitable for a wide range of different applications. It can be used as a power source for a variety of electronic products, including: desktop and notebook computers, servers, storage and network switches, network hubs, and set-top boxes. It is also ideal for other DC-DC regulated power supplies, such as those used in battery-powered devices, automotive electronics, telecom and instrumentation applications. In short, it is an excellent DC-DC converter for applications that require continuous adjustable voltage.

Working Principle

The LM2574HVN-5.0/NOPB switching regulator operates by converting a DC input voltage to a lower DC output voltage. It does this by first converting the input voltage through an internal step-down transformer. This produces an intermediate AC voltage which is then rectified, filtered and regulated to a set output voltage. This is accomplished by a combination of an internal high-speed control circuit and a low-dropout power transistor.

The internal circuit monitors the output voltage and dynamically adjusts the duty cycle of the switch to ensure that the output voltage is maintained and that the transistor remains in its linear region. This provides excellent regulation accuracy, high efficiency, and low ripple noise. In addition, the chip provides over-current, over-temperature and short-circuit protection.

The LM2574HVN-5.0/NOPB can be controlled via its internal clock, external clock, or external voltage. This makes it suitable for both commercial and industrial applications where precise control of the output voltage is required.

Conclusion

The LM2574HVN-5.0/NOPB is a highly efficient, low cost step-down switching regulator. It can be used for a wide range of applications, from computers and servers to automotive electronics and instrumentation. It offers adjustable output voltage, low ripple noise, excellent regulation accuracy, and over-current, over-temperature and short-circuit protection. Overall, the LM2574HVN-5.0/NOPB is an excellent choice for DC-DC regulated power supplies.