L6591TR

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PMIC controllers are integrated circuits primarily used for management of power in many applications. One such controller is the L6591TR, and it can be found in a variety of offline switcher, AC/DC converter, and electronic non-isolated power supplies. This article will discuss the application fields and working principles of the L6591TR.

The L6591TR is designed to provide maximum flexibility and efficiency when converting a variety of AC/DC power supplies while maintaining power management features consistent with all existing power management solutions. The chip features a wide range of configurable parameters, allowing for tailor-made solutions for a variety of application fields. Some of the application fields for the L6591TR include:

• Automotive charging systems
• Portable computing, phones and industrial products
• Audio, audio/video and media players, LEDs and power supplies
• Low-power distributed DC/DC converters and power supplies
• High-performance applications that require fast startup, lock-in and high system efficiency

The L6591TR is designed to work with a wide range of voltage and current levels. It has an input voltage range of 1.35 V to 5.5 V and a peak current limit of 500 mA. It is also designed to operate across a wide range of switching frequencies, from 25 kHz to 500 kHz. The chip can support a wide variety of output voltages, from 5 V down to 0.8 V, depending on the application.

The L6591TR also features a number of adjustable parameters for application flexibility, including: an on/off control pin, a steady-state control pin, a thermal protection pin, and a feedback voltage sense pin. The on/off control pin allows the user to turn the L6591TR on or off without actually cycling power. This is useful for applications where the L6591TR is required to respond quickly to voltage changes. The steady-state control pin is used to set the L6591TR\'s output voltage level for more stable operating conditions.

The thermal protection pin helps protect the L6591TR from damage by reducing its output voltage when it detects that the chip is running at high temperatures. Finally, the feedback voltage sense pin allows the user to monitor the output voltage of the L6591TR. This can be used to check that the output voltage is within the required range.

The working principle of the L6591TR comes down to its switching mechanism. The L6591TR works by switching on and off its power stage in a square-wave pattern, alternating between its peak and ground terminals. During the positive cycle, the L6591TR charges its inductor and thus delivers current to the output. During the negative cycle, the L6591TR switches off and the stored energy in the inductor is lost. The frequency and the duty cycle of the switching depend on the application, and it can be adjusted using the adjustable parameters described previously.

In conclusion, the L6591TR is a versatile PMIC controller designed to provide maximum flexibility and efficiency in a variety of AC/DC convertor, offline switcher, and electronic non-isolated power supply applications. It operates across a wide range of voltages and currents, and its adjustable parameters allow for custom application fields. Its working principle can be summarized as a square-wave switching mechanism between its peak and ground terminals.

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