BQ25015RHLR

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The BQ25015RHLR chip is classified as a PMIC (Power Management Integrated Circuit) in the Battery Chargers category. It\'s a highly efficient, low cost battery charger IC with an internal switch, which supports low voltage adapter and USB port power sources. The power is then distributed efficently to a single cell Li-ion pack or step-down regulator. The BQ25015RHLR chip can be adapted to a variety of battery charging solutions, ranging from portables to home applications.

Applications

The BQ25015RHLR chip can be applied in a wide range of products, such as portable devices, digital cameras, software-controlled AC adapters, automotive battery charging systems, etc. The features it provides allow it to support solutions for battery management, such as charge and discharge control and over-voltage protection for Li-Ion batteries. This chip is designed for applications that require low noise and low voltage ripple during charging. Additionally, it offers a variety of safety features, such as overcharge protection, under-voltage lockout, thermal regulation, and reverse current protection.

Features

The BQ25015RHLR chip includes a wide range of features over its predecessor chips, such as:

• Integrated low-dropout (LDO) linear regulator
• Programmable input current limit for USB high-speed charging
• Programmable charge current capability up to 1.5A
• Programmable charge voltage capability up to 4.4V
• Integrated low-side N-channel MOSFET
• Programmable charge termination time
• Charge status flag
• Integrated voltage regulation loop
• Integrated Power Path Management (PTP) system

Working Principle

The working principle of the BQ25015RHLR chip is relatively simple. It uses an internal linear regulator to convert the input voltage to a constant output. This output voltage is then used to charge the battery. The chip monitors the battery voltage, current and temperature to ensure that the charging process is done safely and efficiently.

The regulator initially starts in a buck mode and then switches to a buck-boost mode to maintain a constant voltage. This means that the output voltage is always kept within a certain tolerance. The chip also features current sensing, allowing it to control the charge rate and time. This helps to prevent overcharging of the battery, which can cause permanent damage.

The chip features integrated Power Path Management (PTP) system, which allows it to supply power from the battery to the system load even when the external power source is not connected. This feature helps to protect the battery from over-discharge and also allows the system to be powered at all times.

Overall, the BQ25015RHLR chip is an ideal solution for energy efficient and safe battery charging applications. Its integrated linear regulator and PTP system make it ideal for portable devices and automotive battery charging solutions. The chip also includes a variety of other features that makes it an attractive choice over its predecessors.

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