ISL6256AHRZ-T

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The ISL6256AHRZ-T is an integrated switching battery charger designed for use with a range of batteries, making it suitable for many applications. The device combines a buck conversion stage with a linear current mode control topology to achieve high efficiency throughout the entire battery charge cycle. Its full-power integrated synchronous MOSFETs significantly reduce the series connection resistance associated with traditional discrete solutions. The integrated current sensing input allows for automated detection of battery type and accurate monitoring of charge current. With its low 100 mA quiescent current, the ISL6256AHRZ-T is an excellent choice for low-power solutions that need efficient battery charging.

The ISL6256AHRZ-T is a typical battery charger that can charge Li-Ion, Li-Polymer, NiMH, NiCad and lead-acid batteries. It supports two modes: constant current/constant voltage (CC/CV) and trickle charge. CC/CV is the most common charging mode, where the charger initially charges the battery with a constant current and then switches to a constant voltage when the battery is nearly full. It then regulates the current to maintain the battery at full charge until the charger is disconnected. The second mode, called trickle charge, is used to top up a battery that has only been partially discharged. In this mode, the charger maintains a low current until the battery reaches its full capacity.

In addition to the charging modes, the ISL6256AHRZ-T has multiple safety features to protect the battery from overcharge, over-discharge, short-circuit and thermal runaway. The device has an adjustable timer designed to turn off the charger if the battery takes too long to charge, thus avoiding damage to the battery. It also has a reverse current path protection to prevent current flowing back into the charger, and an over-voltage protection circuit to make sure the voltage never exceeds the safe level.

The ISL6256AHRZ-T is designed to offer a high level of flexibility and performance. Its internal control system employs a pulse-width modulation (PWM) controller to provide precise voltage and current levels. Its low output ripple ensures smooth charging, and it supports input voltages up to 38V to support a wide range of battery types. The device has a simple UART interface for connecting to an external microcontroller, and an LED indicator to display the charge status.

The ISL6256AHRZ-T is ideal for applications such as portable devices, consumer electronics, medical equipment and automotive. It is especially well suited for applications where low power and space are at a premium, such as wearables and hearing aids. With its integrated synchronous MOSFETs, safety features, and wide input voltage range, the ISL6256AHRZ-T is a great choice for efficient battery charging in today’s mobile and connected world.

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