Description:The ISL6256, ISL6256A is a highly integrated battery charger controller for Li-ion/Li-ion polymer batteries. High Efficiency is achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the adapter or battery. The low side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting. The constant output voltage can be selected for 2, 3 and 4 series Li-ion cells with 0. 5% accuracy over-temperature. It can also
The recommended layout for the ISL6256AHAZ involves placing the input capacitors close to the VIN pin, using a solid ground plane, and keeping the high-current paths short and wide. Additionally, it's recommended to place the output capacitors close to the VOUT pin and to use a separate power plane for the output voltage.
To select the right inductor for the ISL6256AHAZ, consider the maximum current rating, inductance value, and DC resistance. The inductor should be able to handle the maximum output current and have a low DC resistance to minimize power loss. A good starting point is to use an inductor with an inductance value between 1uH to 4.7uH and a current rating of at least 2A.
The maximum junction temperature for the ISL6256AHAZ is 125°C. It's essential to ensure that the device operates within this temperature range to prevent damage and ensure reliable operation.
To configure the ISL6256AHAZ for a specific output voltage, you need to select the appropriate resistor values for the feedback network. The datasheet provides a formula to calculate the resistor values based on the desired output voltage. Additionally, you can use online calculators or simulation tools to simplify the process.
The EN (Enable) pin on the ISL6256AHAZ is used to enable or disable the device. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. This pin can be used to implement power sequencing or to turn off the device when not in use.
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ISL6256AHAZ Overview
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