The ISL9209B is an integrated circuit (IC) optimized to provide a redundant safety protection to a Li-ion battery from failures of a charging system. The IC monitors the input voltage, the battery voltage and the charge current. When any of the three parameters exceeds its limit, the IC turns off an internal P-Channel MOSFET to remove the power from the charging system. In addition to the above protected parameters, the IC also monitors its own internal temperature and turns off the P-Channel MOSFET when the temperature exceeds +140°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9209B has triple-level protection and is two-fault tolerant. Application Note 1300 ISL9209EVAL1Z Application Note Introduction Design Specification The ISL9209EVAL1Z is the evaluation board for the ISL9209 The design specifications are given in Table 1. double-fault tolerant charging system solution. The TABLE 1. DESIGN SPECIFICATIONS components for the entire solution are placed inside the white rectangular box (see Figure 1). The system mainly consists of SPECIFICATION MIN TYP ……