BQ24262RGET

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Texas Instruments\' BQ24262RGET is part of the larger BQ2x family of high-performance, low-quiescent current Li-Ion battery charger ICs. The BQ24262RGET provides cost savings and design simplicity for portable applications requiring an integrated constant-current/constant-voltage charger for single-cell Li-Ion and Li-Polymer batteries.

The BQ24262RGET can be used in a variety of applications, such as notebooks, tablets, mobile phones, portable medical equipment, digital and video cameras. The charge output is adjustable over a range of 3.1 to 4.2 volts and up to 1.5 amps. It features over-voltage protection, input under-voltage lockout, charge current regulation, thermal regulation and safety timer regulation. The BQ24262RGET also offers an optional integrated boost-controller to simplify designs that require a higher output voltage.

Application Field

The BQ24262RGET is a Dual Input, Charge Control IC tailored for Li-Ion and Li-Polymer battery applications. This IC can charge Li-Ion/Li-Po batteries from an USB adapter with a power capacity between 1.2 and 8.0V or an external DC source with input voltage up to 100V. It provides a highly integrated solution with a typical battery feed-forward current accuracy of +/-3%. The ADC inside the BQ24262RGET can monitor the charging process and protect the battery from over-voltage and over-temperature conditions.

The BQ24262RGET also features an adjustable low power loop, enabling the system to optimize power consumption during the battery charge process. This feature is particularly useful in applications that require the system to remain in low power state while the battery is being charged. The device also contains brownout protection and soft start circuitry to reduce inrush current and help protect the components from power surges.

Working Principle

The BQ24262RGET is designed to be used in portable applications, allowing for single cell Li-Ion, and Li-Polymer battery charging. This IC works by way of a buck-boost converter circuit. The IC takes DC power from an external source, which can range from 1.2 to 8.0 volts, and converts it into the correct power level and regulation required for charging the targeted battery. The buck-boost converter works by switching the power from the external source from high voltage to either higher or lower voltage, depending on what is necessary to correctly kick-start the charging cycle of the battery.

Once the charging cycle has been initialized, the IC then shifts to a controlled current flow mode. This mode ensures the battery is being charged with a constant and safe current flow, while also preventing overcharging of the battery. The IC also implements over temperature protection and charge completion detection, to ensure proper and safe charging of the target battery.

The BQ24262RGET is a high-performance, cost-effective Li-Ion/Li-Polymer battery charger IC. The IC helps simplify the design of Li-Ion/Li-Polymer charger applications for portable devices, by providing cost savings and design simplicity. The IC also features over-voltage protection, input under-voltage lockout, charge current regulation, thermal regulation, and safety timer regulation, as well as an optional integrated boost-controller to simplify designs that require a higher output voltage.

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