MAX14657ETE+T

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The MAX14657ETE+T is a simple, cost-effective battery charger which can provide up to 6A of current for power conversion and fast charging of mobile devices such as smartphones and tablets. The battery charger features a wide input range from 4.5V to 28V, so it can be used for either USB or wall charger applications. It can provide three step charging, with a fast-charge current of up to 6A and a trickle-charging current for maintenance of battery charge. Additionally, the Maxim MAX14657ETE+T protects against reverse-battery charging, overcharge, undercharge, and over-temperature. It is well suited for use in portable devices, as it features a low profile, low standby quiescent current and low galvanic isolation.

The Maxim MAX14657ETE+T is a Polymer Metal-Oxide Semiconductor Field-Effect Transistor (PMOSFET) battery charging solution. The PMOSFET technology offers many advantages over other types of battery charging solutions. It provides very high efficiency, low cost, and excellent charge current regulation and control. Furthermore, the PMOSFET’s low On-resistance and linear technology allow for quick charging, as well as charge current optimization.

The MAX14657ETE+T utilizes a switch-mode topology for power conversion, which helps to minimize battery voltage drop during the charging cycle. This is accomplished by using the constant on-time (COT) control with an internal charging switch, rather than using a linear regulator. This reduces heat dissipation, and allows for higher efficiency. The COT control also allows for a wide input voltage range (from 4.5V to 28V).

The MAX14657ETE+T also features auto-term monitoring, which allows for accurate, safe charging. The auto-term monitoring takes readings of the battery terminals, checking the voltage and current to determine whether the charge cycle is complete. In the event that the battery voltage drops below a pre-set threshold, the device will switch-off so as to not over-charge the battery.

The MAX14657ETE+T is well suited for use in applications such as mobile phones, mp3 players, digital cameras, and GPS units, where there is a need a high current, efficient battery charger with both wall and USB compatibility. Battery charging solutions such as the MAX14657ETE+T help to reduce end cost of these devices, as well as maximize portability and battery life of the mobile device.

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