ISL6292DCRZ

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The ISL6292DCRZ, designed and produced by Intersil, is a 3-A, high efficiency, synchronous step-down battery charger for Li-Ion, Li-Polymer and Lithium-Iron Phosphate batteries. It is a Power Management Integrated Circuit (PMIC) optimized for battery charger applications. It offers a fully integrated solution to provide accurate and cost efficient battery charging and power management.

The ISL6292DCRZ is specifically designed for portable battery powered applications. It incorporates Pulse Width Modulation (PWM) architecture utilizing a combination of RDSON lowside MOSFETs and Ultra Low Dropout (ULDO) linear regulator to achieve high efficiency and fast transient response. It supports low quiescent current in both operating modes, making it ideal for low power applications.

The ISL6292DCRZ supports multiple charge algorithms (constant current/constant voltage, Max Charge Voltage, Termination voltage and cycle-by-cycle current limit/voltage protection). It also features programmable safety features (input UVLO, fault condition monitoring and thermal regulation). These features together provide safe charging and make it viable for a wide range of applications. The device is available in 9x9mm BGA package.

The ISL6292DCRZ is well suited for a variety of battery-powered portable applications such as smartphones, tablets, medical instruments, personal healthcare devices, and other battery-powered consumer devices. It works by first determining the battery’s chemistry and then initially charges it up at a constant current value until the battery voltage reaches the peak charge voltage. Once it reaches the peak, the charger then transitions to a constant voltage charging mode until the current drops to a predetermined value, known as the termination current. After the termination current is reached, the charger is then shut off.

The ISL6292DCRZ operates at aproximately 96.8-percent efficiency, requiring low input and output capacitors. The high efficiency of the device helps to reduce the total overall cost while the low quiescent current of the device ensures low power consumption.

To ensure safety during operation, the ISL6292DCRZ features multiple power-related protections. It features an adjustable low voltage protection so that the device does not operate when the input voltage becomes too low. Furthermore, there is a thermal derating protection which ensures that the charger does not operate when the die temperature exceeds a specified limit. Additionally, the ISL6292DCRZ features an adjustable over-current protection so that the device does not draw too much current from the battery.

In conclusion, the ISL6292DCRZ is a high-efficiency, low-cost, integrated step-down battery charger optimized for Li-Ion, Li-Polymer and Lithium-Iron Phosphate battery chemistries. It is ideal for low power portable applications and features programmable safety features for safe charging. The device operates at very high efficiency and requires low input and output capacitors. Additional safety features such as adjustable input under-voltage lockout, fault condition monitoring, and thermal derating protection make it a viable option for many different battery charging applications.

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