ISL9205DIRZ-T

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Power management ICs (PMICs) are available in a wide variety of shapes, sizes, and packages to provide a variety of functions and performance levels. One such example is the ISL9205DIRZ-T, which is designed as a battery charger IC. It is a PMIC designed to provide efficient power for the portable applications such as mobile handsets and tablet PCs. Moreover, with its innovative gallium nitride (GaN) technology, the ISL9205DIRZ-T enables high power densities without the typical high dissipation losses associated with traditional MOSFETs.

The ISL9205DIRZ-T is a battery charger integrated circuit (IC) designed to provide high-efficiency charging of both lithium-ion (Li-ion) and lithium-polymer (Li-poly) batteries. It integrates a positive voltage biasing (VBOOT) system, control logic, switching and charge current regulation, over-current and over-temperature protection, and a switching controller. It is designed to work in both charging and monitoring modes. The charge current can be programmed up to 2.5A. The built-in voltage-bridge architecture increases the accuracy of the output voltage with low ripple noise.

The ISL9205DIRZ-T battery charger features a unique combination of features, including an I2C-controlled digital interface for communication and monitoring, an integrated safety timer, adjustable filtering options, and an adjustable oscillator for high noise immunity. Additionally, the IC includes charging and monitoring functionality, multiple charging voltage sequencing, and a range of optional features, such as input current limiting, dual-level under-voltage lockout, input current monitoring, and over-temperature protection.

The architecture of the ISL9205DIRZ-T battery charger IC is based upon a monolithic MOSFET-based synchronous buck converter, which is capable of providing very high efficiency and fast transient response. The IC utilizes an algorithm to optimize the charging of the Li-ion and Li-poly batteries, as well as operating in a pass-through mode for other batteries. The charge cycle is divided into three phases: pre-conditioning, constant-current (CC) and constant-voltage (CV).

Integrated with the ISL9205DIRZ-T battery charger is an N-channel MOSFET, which is used as the switching element for the buck converter. The MOSFET is capable of withstanding peak voltages of up to 16V, allowing for charging from a wide range of sources. With the MOSFET in place, the battery charger is able to provide a very high efficiency, with minimal power dissipation.

The ISL9205DIRZ-T battery charger is designed to be very reliable and safe, as it is over-temperature protected and also features a thermal limitation feature. Additionally, the ISL9205DIRZ-T features over-current protection, which will be enabled when the charge current exceeds a certain threshold. The IC also includes an Adjacent Channel Interference (ACI) detector, helping to reduce possible interferences with other devices. Additionally, the IC includes a dual-level under-voltage lockout, which helps to prevent overcharging of the battery.

The ISL9205DIRZ-T is an ideal battery charger IC for a wide range of portable and mobile applications, offering high efficiency with minimal power dissipation. The advanced features included in the IC make it a great choice for battery-powered applications, such as notebook PCs and tablets, as well as more energy-intensive applications, such as electronic medical devices. Additionally, the ISL9205DIRZ-T is designed to be very reliable and safe, making it a great choice for even the most demanding applications.

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