ISL6251AHRZ

ISL6251AHRZ application field and working principle

ISL6251AHRZ is a highly-integrated power management IC (PMIC) developed by Intersil Corporation. The device is used as a battery charger in various applications such as mobile phones, personal digital assistants (PDA), and laptop computers.

The ISL6251AHRZ is a one-stop solution for battery charging requirements and provides multiple power management functions such as voltage monitoring and control, cell balancing, battery temperature monitoring and charging current control. The device effectively balances the load for optimal battery charging and is compatible with multiple battery chemistries such as lithium ion (Li-ion), lithium polymer (Li-Poly), nickel metal hydride (NiMH), and nickel-cadmium (NiCd).

The ISL6251AHRZ operates in a three-stage charging cycle. During the first stage of the charging cycle, the device regulates battery charge voltage, constant current and constant voltage charging. In the second stage, the device monitors cell temperature and dynamically adjusts the charge voltage when needed, providing optimal battery charge and safety. If a temperature fault occurs, the device will enter a battery recover mode or thermal protection state to maintain the battery safe and healthy. In the final stage, the device manages the battery\'s full-charge detection process and enables cell balancing to ensure individual cell voltages are equalized.

The ISL6251AHRZ also integrates a wide range of safety features including over-temperature protection, input voltage/current protection, and short-circuit/over-voltage protection. These safety features protect the device from abnormal operating conditions and ensure proper and safe operation. Overall, the ISL6251AHRZ provides an efficient, reliable, and secure power management solution for battery charging applications.