BQ25071QWDQCRQ1

BQ25071QWDQCRQ1 is a programmable standalone linear Li-Ion and Li-Polymer charger IC, integrating all power management functions and housed in a space-saving 0.8mm high, Quad Flat No-Lead (QFN) package. This high-density packaging solution helps manufacturers optimize space, reduce weight and achieve a smaller value profile component in the system that lowers nominal system cost. This IC incorporates several features to simplify charger design and optimize system performance. In addition to its switching regulator architecture, to lower system cost and improve system integration, low drop-out linear voltage regulators (LDOs) are also integrated to provide independent dedicated power sources for key ICs.

BQ25071QWDQCRQ1 application field and working principle lies mostly in the management of power from the primary power source, batteries, to the laptops, phones, or other devices that are powered by it. This IC integrates power regulation, battery monitoring and protection, and system enable functions, to provide an optimum solution for battery powered applications. It is designed for primary and secondary battery-powered applications with 14.4V (4S) or 10.8V (3S) batteries, featuring an Advance Energy Harvesting (AEH) algorithm that can utilize energy from a solar panel, supercapacitors, or any other energy harvesting mechanisms.

The applications of BQ25071QWDQCRQ1 span across various portable systems such as personal healthcare devices, mobiles, PDAs and automotive applications. This IC module helps in achieving improved system efficiency with adjustable input current capability and battery temperature monitoring. Its primary functions are to convert the raw input power or energy from the batteries and regulate the output power of the device. This IC module also enables cost savings from reduced off-loading output voltage losses, improved short-circuit protection, and satisfying transient load demand.

The BQ25071QWDQCRQ1 charger IC module works in two stages, the initial power conditioning and voltage regulation stage, and the battery charging stage. During the power conditioning stage, the IC module reduces the input power source voltage (batteries) to a level that can be safely regulated by the charger ICs. It is done by controlling a power switch, which enables the current to pass through a voltage-regulating element, such as a diode. Once the desired output voltage is obtained, the IC switches to the charging stage, where it provides constant current, constant voltage, and battery temperature monitoring to ensure safe and fast charging of the battery.

The BQ25071QWDQCRQ1 IC module also supports a host of system level functions such as overvoltage protection, reverse current protection, reverse battery protection, undervoltage lockout, and thermal protection, all of which ensure safe operation of the device and batteries. The IC also supports adjustable input current capability, maximum charge current, charge voltage, and charge time, allowing for improved system efficiency. In addition, its superior accuracy and precise temperature monitoring of the battery pack help to reduce system power loss, eliminate the need for additional components, and reduce battery charging time.

The BQ25071QWDQCRQ1 is an advanced and integrated 4-switch buck-boost linear battery charger IC that simplifies the development of battery powered applications. With integrated power conditioning and voltage regulation, battery charging, and system enable functions, this IC is a versatile solution for portable and automotive applications. It offers improved system efficiency, fast and safe charging of the battery, and superior accuracy, making it a perfect choice for powering handheld and mobile devices.