MAX5974CETE+T

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The latest MAX5974CETE+T AC-DC and offline switcher ICs are specially designed for applications needing limited power output, high efficiency, and both power supply and communication interface integration. The device integrates an AC-DC converter, an offline high frequency switcher, and an LED driver IC, all of which are housed in the same single-package device. This article will explain their application fields and working principles.

Applications

The MAX5974CETE+T AC-DC and offline switcher ICs provide an integrated solution that enables equipment designers to significantly reduce the number of components and cost of product development. Apart from providing convenient input power to various equipment, their integrated LED driver also allows product designers to use a single chip for overvoltage, undervoltage protection, current limiting, ESD protection, lighting solutions, and control solutions. They are used in a variety of applications, such as LED lighting, industrial and consumer electronic devices, automotive applications, portable devices, and point-of-load power supplies.

Working Principle

The MAX5974CETE+T AC-DC and offline switcher ICs feature a multi-mode constant voltage/constant current (CV/CC) controller. This controller provides excellent power supply dynamic performance while minimizing component count and board space. The CV/CC control scheme combines the best features of control techniques into a unique control architecture, enabling accurate voltage and current regulation of the load with a single device. The device also has a programmable soft-start function that provides a more controlled start-up of loads, as well as providing protection when higher peak currents are drawn from the supply. Additionally, the device has a hysteresis loop that avoids too much current being drawn from the supply during normal operation, reducing the bill of material and increasing the system efficiency.

The MAX5974CETE+T AC-DC and offline switcher ICs also feature an integrated high frequency switch mode power supply. The device is designed to offer high efficiency and low cost, making it an ideal choice for applications that require limited power output and high efficiency. This integrated switch mode power supply provides a low-noise, reliable, and tightly regulated output voltage that is insensitive to line voltage variations and load transients.

The device also features an integrated LED driver that allows the use of multiple LEDs connected in series to the device and individually controlled. This integrated LED driver allows product designers to use a single chip for overvoltage and undervoltage protection, current limiting, ESD protection, lighting solutions, and control solutions, while minimizing component count and cost of product design.

Conclusion

The MAX5974CETE+T AC-DC and offline switcher ICs offer an integrated solution for applications needing limited power output, high efficiency, and both power supply and communication interface integration. Their integrated power converter, high frequency switcher, and LED driver ICs all housed in one single-package device, allowing product designers to reduce component count and cost of product development. Additionally, their multi-mode CV/CC control scheme and integrated LED driver provide improved system performance, while their integrated switch mode power supply provides a low-noise, reliable, and tightly regulated output voltage.

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