AAT3681AIJS-4.2-T1

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AAT3681AIJS-4.2-T1 is a family of Battery Charger Integrated Circuits from Diodes Incorporated. This device is used in portable electronics applications such as tablet PCs, pagers, and mobile phones to manage their power delivery. It is a low current linear charger which integrates charge control and MOSFET switching into a single integrated circuit. This device is available in a surface mount package and utilizes low voltage drop, standard logic level MOSFETs. The AAT3681AIJS-4.2-T1 includes several features that make it suitable for a range of advanced battery charging applications.

AAT3681AIJS-4.2-T1 belongs to the PMIC (Power Management Integrated Circuit) category, specifically Battery Chargers. It is designed to control the charging and discharging of various types of lithium-ion and Lithium Ion Polymer (Li-Po) batteries in hand-held, portable, or mobile consumer devices. This device supports various circuitry configurations, including topologies such as Constant Current (CC) and Constant Voltage (CV) when charging, and Battery Discharge and trickle charging.

The AAT3681AIJS-4.2-T1 features an integrated current-mode controller that efficiently shifts energy from the supply to the battery during the charge cycle. This device senses the charge current accruing to the battery and regulates the charging current by turning off the external MOSFET and regulation loop together, before the battery reaches full charge. In addition, the AAT3681AIJS-4.2-T1 senses the battery voltage and adjusts the external MOSFET on/off times to keep the battery charging at a safe level.

The integrated Charge Full indicator on the AAT3681AIJS-4.2-T1 will notify the microcontroller or host device when the battery is fully charged. This device also includes an over-voltage protection circuit that detects and responds to short-circuit and open circuit conditions. This provides enhanced protection from overcharging and prevents damage to the battery or the device.

The AAT3681AIJS-4.2-T1 also supports CV charging and trickle charging, which can help to extend battery life and protect the battery from overcharging. The trickle charging feature enables the AAT3681AIJS-4.2-T1 to detect when the battery has been idle for an extended period of time and regulate the current flow so as to maintain a stable voltage level.

In addition, the AAT3681AIJS-4.2-T1 supports various safety features such as temperature monitoring, under-voltage lockout, over-temperature protection, voltage source protection, and Short Circuit Current Limit. These features improve system performance and reliability and extend product life.

The AAT3681AIJS-4.2-T1 is an ideal solution for efficiently managing the charging of Li-ion batteries in power-sensitive electronics applications. This device is well-suited for new-generation portable electronic designs, particularly those requiring high precision and efficient charging.

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