BQ24061DRCR

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PMICs (Power Management ICs)  are specialized ICs that helps designers incorporate regulatory functions and protection, monitoring, and charging schemes into their designs. BQ24061DRCR is a PMIC devoted to battery charger applications. This type of IC is battery-charging dedicated, and is used to perform all the control and power-based functions for any battery-management system, thereby eliminating the need for engineers to design such functions from the ground up.

The BQ24061DRCR is a high voltage, single-cell Li-ion battery charger, as well as an integrated temperature monitor and cell balancer. It is capable of fast-charging, and comes integrated with a single 12-bit ADCs, two captive transistors, and two 16-bit timers, all of which helps in managing battery-charging protocols.

Application fields for the BQ24061DRCR include industrial power-driven equipment, consumer battery-driven products like Bluetooth headsets, digital cameras, and so on. The battery charging dedicated IC is also capable of being utilized in programmable, high power battery-charging systems.

As for the working principle, the BQ24061DRCR incorporates features like variable step rate charging, input under-voltage lockout, input over-current limit, thermal regulation, and cell temperature monitoring for battery safety. The IC is also capable of providing an accurate voltage and current control, as well as keeping up with safety requirements, like output current and temperatures, battery protection, and so on.

The charge process begins with the IC detecting the input voltage. If it is within the safe threshold, then power is applied to the Li-ion battery. The charge then follows two phases. Initially the charge process follows Constant Current (CC) phase where a current source charges the battery with a constant current value. After the CC phase, the charge then follows the Constant Voltage (CV) phase, where a voltage source is applied to the battery such that the voltage is maintained at a specific value, while safely decreasing the current magnitude until the battery reaches its full capacity.

In order to turn off the charge-program, the BQ24061DRCR utilizes a sophisticated algorithm to monitor for conditions such as the current draw decreasing, battery temperature rising, and others. In order to ensure safety, the IC has battery protection features, such as over-discharge and over-charge protection. Once any of these conditions detect, the charge process is terminated.

The BQ24061DRCR’s features combine to make it an ideal choice for high-power, fast-charging applications. Its input voltage, current and temperature thresholds, as well as its output current and voltage control together make the IC an ideal choice for Li-ion battery charging systems.

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