Maxim Integrated MAX1811ESA-T USB-Powered Li+ Battery Charger

The MAX1811ESA-T from Maxim Integrated is a compact and efficient solution designed for charging single-cell lithium-ion (Li+) batteries. This versatile integrated circuit (IC) is specifically tailored to be powered via a Universal Serial Bus (USB) port, making it an ideal choice for portable electronic devices such as smartphones, digital cameras, and handheld gaming systems.

With its small size, the MAX1811ESA-T comes in an 8-pin SOIC (ESA) package, ensuring a minimal footprint on the PCB, which is crucial for space-constrained applications. This product is characterized by its simplicity and ease of use, requiring only a few external components to create a complete charging system.

One of the key features of the MAX1811ESA-T is its ability to automatically adjust the charging current based on the USB port's capability. It can charge at 100mA or 500mA, depending on whether the USB port is a standard downstream port or a charging downstream port. This ensures compliance with USB power specifications while maximizing charging efficiency.

The MAX1811ESA-T also offers a range of safety features to protect the battery and the charging system. These include preconditioning of deeply discharged batteries, constant current and constant voltage charging modes, and thermal regulation to prevent overheating. Additionally, an automatic charge termination feature helps to extend battery life by preventing overcharging.

For enhanced user experience, the MAX1811ESA-T includes a charge-status output that can be used to drive an LED indicator, providing visual feedback on the charging process. This allows users to easily monitor the charging status of their device.

Overall, the MAX1811ESA-T from Maxim Integrated is a highly reliable and user-friendly Li+ battery charging solution that combines performance, compactness, and ease of integration, making it a top choice for designers looking to incorporate USB charging capabilities into their portable electronic products.