MAX1870AETJ+

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PMIC - Battery Chargers: MAX1870AETJ+ Application Field and Working Principle

The MAX1870AETJ+ Battery Charger from Maxim Integrated is a single-cell Li-Ion/Li-Polymer linear charger integrated with a 500mA power switch. The charger integrates all power switching and monitoring functions necessary to provide a simple regulated supply for 3.2V, 3.3V, 3.7V, and 4.2V Li-Ion/Li-Polymer batteries. The MAX1870AETJ+ charger will charge a full battery in 2.5 hours when connected to a standard 500mA charger.

The MAX1870AETJ+ is designed to ensure that the battery is safely charged at a high compatibility rate, meeting both IEC60086-2 and IEEE1725 standards. It also offers advanced safety features such as overvoltage protection and thermal shutdown.

The MAX1870AETJ+ charger has two operating modes – Charging and Trickle Charging. During charging, the maximum input voltage for a battery is up to 4.2V and the input voltage for a battery that is not fully charged will be up to 4.1V. In trickling mode, the input voltage will drop to 4.15V. This helps to prevent overcharging the battery and protect it from damage through prolonged charging. The charger also has a safety timer which will terminate the charge cycle if the input current drops below 10mA for 10 consecutive seconds.

The MAX1870AETJ+ charger has a wide variety of applications. It is commonly used for laptop batteries and portable devices such as mobile phones and MP3 players. The charger is capable of handling up to 20V inputs, which makes it well suited for laptop adapter applications. It can also be used to charge a wide range of batteries from a single source, reducing the need for the user to replace the battery charger.

The MAX1870AETJ+ charger is easy to use and integrates many safety and control features into a single IC. It is designed to be used in conjunction with a power supply to ensure efficient and safe charging of the battery. The charger also offers flexibility by allowing the user to set the desired charging current and charging termination voltage.

The MAX1870AETJ+ charger incorporates a charge pump circuit that allows it to work with a wider range of input voltages than a simple linear charger. The charge pump converts input voltages between 3V and 20V into higher voltage outputs, making it suitable for many different types of Li-Ion/Li-Polymer batteries. The integrated safety features and power switching functions make it a reliable and easy to use charging solution.

In conclusion, the MAX1870AETJ+ is a single-cell Li-Ion/Li-Polymer charger that incorporates several safety features, including overvoltage protection and a safety timer, as well as a charge pump circuit for voltage conversion. It is designed for use with a power supply and is capable of handling up to 20V inputs. The charger is capable of charging a wide range of batteries from a single source, making it a reliable and easy to use charging solution.

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