ISL9212BIRZ-T

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The ISL9212BIRZ-T is a highly integrated, low quiescent current, multi-channel Battery Management Switch (BMS) solution for Li-ion/Li-Polymer batteries. It includes two power MOSFETs, two current sense resistors, two voltage sense resistors and two high precision, 1% accurate comparators. This makes it an ideal solution for applications such as smart phones, laptops, and other portable devices.

The ISL9212BIRZ-T is specifically designed to monitor two independently operated battery cells in a series connection. The two internal comparators detect the relative cell voltages and compare them against the user set thresholds. When the user set values are exceeded, the output turn-off voltage (OTF) is asserted to the MOSFET gate and the cells can be discharged by providing a current path control.

The IC also features an integrated over-temperature protection feature that monitors the temperature of the system and can turn off the MOSFETs if the temperature exceeds a certain threshold. This feature provides an additional level of safety for battery-powered applications. Additionally, the ISL9212BIRZ-T also supports reverse current protection, which helps to protect batteries from potential damage due to reverse currents flowing from the battery to the load when the MOSFETs are off.

The ISL9212BIRZ-T can be used in a variety of applications such as electric vehicles (EVs), telematics, laptop battery management, power tools, industrial supplies and more. By integrating the two power MOSFETs, two current sense resistors, two voltage sense resistors, and two 1% accurate comparators, the IC provides an unbeatable solution for battery management applications where board space and cost are both of high importance.

The ISL9212BIRZ-T is designed to be used in applications with a variety of inverters, such as DC/DC converters. The inverter must be configured such that the higher voltage source is connected to the MOSFETs sources and the lower voltage source to their drains. The intended current path is then connected either between the two MOSFETs drains or to the drains directly. This will enable the current control by the MOSFETs and allow the ISL9212BIRZ-T to control the cell voltage accurately. If a buck boost converter is used, then the voltage sense inputs should be connected to the source terminals of the MOSFETs to enable accurate cell voltage sensing.

The ISL9212BIRZ-T has an integrated low quiescent current, low output voltage drop, and over temperature protection, making it one of the best solutions for battery management applications where board space and cost are both of high importance. It is an ideal choice for Li-ion/Li-Polymer powered applications due to its wide range of features and accuracy, along with its ability to handle high current loads.

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