Maxim Integrated MAX1758EAI+T Standalone Switch-Mode Lithium-Ion Battery-Charger IC

The MAX1758EAI+T from Maxim Integrated is a highly efficient, standalone switch-mode battery-charger IC designed specifically for charging single-cell lithium-ion (Li+) batteries. This compact, integrated circuit simplifies the design of battery charging systems by requiring minimal external components, making it an ideal solution for portable electronic devices such as digital cameras, Bluetooth headsets, portable media players, and other small battery-powered gadgets.

This charger IC operates over a wide input voltage range from 4.1V to 5.5V, which makes it compatible with a variety of power sources, including standard USB ports and AC adapters. The MAX1758EAI+T employs a control algorithm that adjusts the charging current and voltage to maximize charging speed while ensuring safety and longevity of the battery.

Key features of the MAX1758EAI+T include:

• Adjustable fast-charge current up to 2A, enabling quick recharging of the battery.
• Thermal regulation to maximize charge rate without risk of overheating.
• Automatic transition to maintenance charge phase after the battery is fully charged.
• Charge status outputs that can directly drive LEDs to indicate charging progress and completion.
• Prequalification of deeply discharged batteries before fast charging begins.
• Under-voltage lockout (UVLO) ensures the charger operates only when the input voltage is within an acceptable range.
• Overvoltage-protected up to 28V, which guards the IC against unexpected power surges.

The MAX1758EAI+T also features a small 28-pin SSOP package, which is optimized for space-constrained applications. It is designed with robust protection features, such as cycle-by-cycle current limit, thermal shutdown, and battery temperature monitoring, which are critical for safe operation and protection of the battery and the device.

With its high level of integration, the MAX1758EAI+T reduces the complexity of designing a Li+ battery charger, offering a reliable and versatile charging solution for product designers and engineers looking to enhance the user experience by minimizing charging time and maximizing product runtime.