BQ26501PWRG4

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Power Management Integrated Circuits (PMICs) are devices responsible for providing the necessary power needed by an electronic device to operate. Battery Management integrated circuits like BQ26501PWRG4 are specifically designed to achieve maximum performance and increased reliability with battery powered systems. The BQ26501PWRG4 is a PowerPath/Battery Management PMIC designed to provide load balancing, over-discharge protection, and battery management solutions for electronic devices. This application note describes the design of the BQ26501PWRG4 and its working principle in Battery Management.

The BQ26501PWRG4 is a high-efficiency, stackable PowerPath/Battery Management PMIC. Its small footprint and minimalist design make it an excellent choice for power constrained designs. It features two independent PowerPath Supplies that can be configured for either linear or switch-mode operation. Additionally, the device includes over-voltage, over-discharge, and battery temperature monitoring and protection as well as a low-power sleep mode. The BQ26501PWRG4 simplifies the design of embedded systems with battery-powered operations since this device can monitor and manage the battery while providing very high efficiency power conversion.

The application field of BQ26501PWRG4 is typically in applications where a safe charge and discharge of a Li-ion battery is required. Examples are medical and industrial instruments, smart watches, handheld tools, nursing machines, solar back-up systems, and on-board chargers. BQ26501PWRG4 can be used in a variety of battery management applications as its high flexibility design allows it to be adjusted as per device or system requirements. It supports dual inputs from USB and/or AC adapters, delivering up to 1.2A of charging current with up to 95.6% peak efficiency.

The working principle of BQ26501PWRG4 is that it can drive either two power supplies or one electronically isolated power supply for battery management. It provides two independent PowerPath Supplies which can be configured for either linear or switch-mode operation. Additionally, the device includes over-voltage, over-discharge, and battery temperature monitoring and protection. It also features a low-power sleep mode that allows the system to shut down when not in use, saving power and extending battery life.

BQ26501PWRG4 requires the use of an external charging coil, battery pack, temperature sensor, and system power source when used in battery management applications. The device uses the system power source as its input and outputs clean, regulated power suitable for powering digital electronic components. It can monitor the voltage across the battery terminals while charging and also provides protection against over-voltage, over-current, and over-temperature conditions. The Smart Battery ManagementTM feature can be used to facilitate accurate battery voltage measurements, battery balancing, temperature-sensing, cell-discharge monitoring, and charge and safety timer monitoring.

The BQ26501PWRG4 provides a high level of flexibility and customization for a wide range of applications. This device can provide improved performance, accuracy and efficiency than traditional PMICs and battery management techniques, making it an ideal solution for applications like medical and industrial instruments, smart watches, handheld tools, nursing machines and solar back-up systems. Its features, such as, two independent power path supplies, over-voltage, over-discharge and battery temperature monitoring and protection, and low-power sleep mode make it a great choice for a variety of designs, applications and markets where high efficiency, reliable battery power and accurate system control are essential.

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