BQ24100RHLR

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A Battery Management System (BMS) is a system employed in the design of a battery pack to keep the cell voltages and other parameters within acceptable parameters for maximum reliability and life. The BQ24100RHLR is a universal linear Battery Charger specifically designed for Li-Ion and Li-Polymer cell applications and supports a variety of configurations up to 4 cells. This charger operates over input voltages from 3.5V to 10V and is highly efficient, reduces the number of external components, and minimizes the solution cost.

The BQ24100RHLR is a flexible, low-cost, integrated linear charger and maintains the balance, safety, and reliability of the battery pack and further supports a variety of applications including smart phones, multimedia, and portable devices. It provides full-featured battery charging, voltage and current monitoring, as well as two-wire digital data communication for smart phone and embedded applications. The charger is composed of four internal linear regulators: three output voltage regulators and one input voltage regulator which can be bypassed in high voltage situations.

The BQ24100RHLR\'s application field includes devices that require a low cost and power efficient solution. This is particularly suitable for a range of devices such as PDAs, digital cameras and MP3 players. With its integrated voltage and current monitoring, two-wire communication, and charge current capability, the BQ24100RHLR further supports a variety of embedded applications.

The working principle of this device is as follows. It employs a low drop-out linear regulator to provide stable output to the device being charged. It also monitors the input voltage and charges the battery only when the voltage is above a certain level. Additionally, it contains four internal 5A low drop-out regulators (LDOs) which keep the battery voltage within a safe range. During operation, the device monitors the battery voltage, current and temperature, and further adjusts the charging current as necessary.

The BQ24100RHLR further provides two-wire serial port communication to enable a host microcontroller to monitor and configure the device. This two-wire communication also allows for programmable overvoltage, undervoltage, overcurrent and overtemperature protection, allowing the pack to safely be used in all conditions. In addition, a global reset signal is generated whenever the output voltage exceeds the preset levels.

In summary, the BQ24100RHLRis a universal linear battery charger specifically designed for Li-Ion and Li-Polymer cell applications, which supports a variety of configurations up to 4 cells. This device further provides two-wire digital data communication for smart phone and embedded applications, overvoltage, undervoltage, overcurrent and overtemperature protection, as well as global reset signal when the output voltage exceeds preset levels. All these features make BQ24100RHLR an ideal solution for low cost and power efficient applications, especially for PDAs, digital cameras, and MP3 players.

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