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ISL6292-1CR4 Application Field and Working Principle

The ISL6292-1CR4 is an active-clamp single-cell Li-ion/Li pol/LiFePO4 battery charger. It integrates an efficient breakout charge FET and two adjustable current regulation loops for independently controlling two charge paths. ISL6292-1CR4 is particularly designed for single-cell Li-ion / Li pol/LiFePO4 batteries with the maximum cell voltage up to 4.3V and capacity of 100 ~ 6000mAh. The charger consists of four main parts: a power FET, a PWM controller, dual current measurement, and MOSFET current loop controllers. It is typically used for cell phone battery, digital camera battery and other portable electronic devices.

Features of ISL6292-1CR4

The ISL6292-1CR4 have several features that make it very useful for many applications. It features an integrated active-clamp FET, adjustable peak and short circuit currents, and a secondary current loop with external MOSFETs. It also supports low temperature charging and fast charge/discharge synchronization. The ISL6292-1CR4 has low power consumption and a wide operating temperature range of -40°C to +125°C.

Working Principle

As the ISL6292-1CR4 is specifically designed for Li-ion/Li pol/LiFePO4 battery charging, it works based on a unified working principle. The charger initially activates in constant current/constant voltage (CC/CV) charging mode when the battery is connected, which maximizes the charge rate and maintains a steady charge current until the battery reaches the prescribed voltage threshold. Then, the charger exits the CC/CV mode and switches to the pulse current mode when the voltage reaches the threshold, then continues to charge at lower pulsed currents until the final charging termination.

The charger also monitors the battery temperature and automatically reduces the peak charge current if the battery temperature is too high. In addition, the charger can be synchronously charged with a separate battery, providing better charge/discharge connection. Moreover, it supports automatic power-on reset feature, so that the charger can automatically detect the battery\'s state of charge and adjust the peak charge current and termination voltage accordingly.

Applications

The ISL6292-1CR4 is suitable for Li-ion/ Li pol/ LiFePO4 battery packs with 4.3V maximum cell voltage and 100 ~ 6000mAh capacity. It can be used in cell phones, digital cameras and other portable electronic devices. It can also be used in medical and consumer devices, electric vehicles, mobile power supplies, and electric toys. In addition, it is suitable for replacing general 1-cell Li-ion/Li po/LiFePO4 chargers.

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