L6566BTR Integrated Circuits (ICs)

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With the evolution of electronic systems and their global usage, power management has become a massive challenge. For example, portable electronic devices require battery or mobile power source and AC/DC converters that are capable of handling various, sometimes extremely complicated, power management. The L6566BTR is a high-performance, advanced offline switcher which addresses the challenge.

The L6566BTR is an application field specifically designed for non-isolated, offline DC/DC converters, such as powered applications and synchronization networks. It is a completely integrated power management IC (PMIC) with advanced features. The L6566BTR is a self-powered, switching regulator composed of a dedicated switching controller, two synchronous rectifier MOSFETs, two bootstrap-boost capacitors, two voltage references and a set of high performance ESD protection MOSFETs. Unlike traditional solutions, the integrated high-voltage dedicated synchronous rectifier allows the output start-up voltage to be boosted up to 10 V, so it can supply higher power in a smaller form factor with fewer external components for increased efficiency, flexibility and durability.

The L6566BTR can be used for different end applications, from low-power applications to higher-power applications. It notably operates in constant frequency and peak current limit mode, without any need of modulation. The self-powered synchronous rectifier not only provides higher-power output, but also provides a significant energy saving. This allows it to be suitable for applications such as comprehensive handsets, headsets, medical sensors, and portable audio devices.

The L6566BTR also provides many advantages in addition to the higher-power output and simpler design. These advantages include improved current accuracy and high peak efficiency. Moreover, this IC includes a set of ESD protection MOSFETs and an integrated VBUS feedback voltage. In terms of designs, it provides flexible bootstrapping and fixed-frequency control as well as adjustable peak current limit capability. With its low operating quiescent current of < 20mA, it is suitable for battery-powered applications.

The working principle of the L6566BTR is simple. It employs an internal, self-powered synchronous rectifier to switch at a fixed frequency and peak current limit, allowing maximum power output with no modulation required. This system synchronizes with the PWM signal from the controller and rectifies the AC input current to provide a DC output. The output DC current is regulated by the output voltage reference. The peak current is limited when the current limit is reached.

In conclusion, the L6566BTR is an advanced power management IC tailored for non-isolated offline DC/DC converters such as powered applications and synchronization networks. It provides many advantages, including a self-powered synchronous rectifier, improved current accuracy, and a compact form factor. It works with a flexible bootstrapping and fixed-frequency control to provide a maximum power output with no modulation required.

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