AP9101CK6-BDTRG1

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PMIC - Battery Management

PMIC- Battery Management is an suite of integrated circuits that provide power management functions such as charging, current regulation, voltage regulation, and temperature protection. The AP9101CK6-BDTRG1 is one such integrated circuit, and this application note will discuss its field of use, as well as its working principle.

Application Field

The AP9101CK6-BDTRG1 is a high-efficiency step-down DC/DC converter for battery applications. It is specifically designed for use in battery-backed applications such as gigabit network switches and servers, as well as wireless base stations and routers. It is ideal for applications that require high efficiency and excellent transient response.

The AP9101CK6-BDTRG1 can operate over a wide input voltage range, from 2.5V to 10V, making it perfect for a variety of power sources. It also has a wide range of output voltage options, allowing the user to tailor it to their specific needs. Additionally, its integrated protection features make it a reliable power solution, as it protects against overcurrent, overvoltage, and thermal shutdown.

Aside from its broad application field, the AP9101CK6-BDTRG1 has a low quiescent current, making it perfect for use in battery-backed power systems. This low quiescent current also allows for extended operation time when the system is running on battery power. Furthermore, its integrated thermal sensing circuit makes it an ideal solution for safeguarding the system against thermal overloads.

Working Principle

The AP9101CK6-BDTRG1 is a buck-type DC/DC converter, which means that it is capable of producing a lower output voltage than its input voltage. The output voltage is controlled by two main parameters: the input voltage and the duty cycle. The input voltage is used to set the output voltage, while the duty cycle is used to set the amount of current that is delivered to the load.

The AP9101CK6-BDTRG1 is designed to operate in the continuous conduction mode (CCM). In this mode, the inductor current is continuous, while the output voltage is regulated by changing the duty cycle of the switching transistor. When the load current increases, the duty cycle is decreased, which results in a decrease in the output voltage. Conversely, when the load current decreases, the duty cycle is increased, causing an increase in the output voltage.

The AP9101CK6-BDTRG1 is equipped with several protection features. It has an adjustable overcurrent limit, overvoltage protection, and a thermal shutdown. The integrated overcurrent limit operates by detecting the rising of the internal current limit resistor, and turning off the output when the limit is reached. The overvoltage protection prevents the output voltage from exceeding a predetermined threshold, and the thermal shutdown protects the circuit from excessive heat buildup.

The AP9101CK6-BDTRG1 is a versatile and reliable power solution, perfect for use in a wide range of battery-backed applications. Its low quiescent current makes it suitable for extended battery life, and its integrated protection features ensure a safe and reliable power system.

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