Maxim Integrated MAX1645BEEI+T Product Overview

The MAX1645BEEI+T from Maxim Integrated is a high-performance, step-down, switch-mode battery-charger controller designed to manage the power requirements of modern, portable electronic devices. This integrated circuit (IC) is tailored to deliver efficient charging solutions for single-cell lithium-ion (Li+) batteries, which are widely used in smartphones, tablets, digital cameras, and other portable equipment.

Key Features

• High Efficiency: The MAX1645BEEI+T employs a synchronous-rectified, buck topology which ensures high efficiency during the charging process, thereby reducing heat and improving overall system performance.
• Programmable Charge Parameters: Users can program the charge current, charge voltage, and termination current via external resistors, allowing for a highly customizable charging profile tailored to specific battery requirements.
• Thermal Regulation: To protect the battery and circuit, the device includes a thermal-regulation feature that reduces charge current if the die temperature exceeds a safe threshold.
• Charge Status Indicators: The IC provides a charge status output that can drive an LED to indicate charging activity and completion, enhancing user interface capabilities.

Power Management and Safety

The MAX1645BEEI+T incorporates several safety features to ensure reliable operation under various conditions. These include prequalification charging for deeply discharged batteries, automatic top-off charging, and a safety timer for charge termination. Moreover, the device supports a low-battery restart function, ensuring that the system can recover from a deeply discharged state.

Package and Integration

Available in a compact 28-pin QSOP package, the MAX1645BEEI+T is designed for space-constrained applications. Its small footprint and minimal external component requirements make it an ideal choice for integrating into portable devices where space is at a premium. Additionally, the device is specified over the extended -40°C to +85°C temperature range, accommodating a wide range of operating environments.

Applications

With its versatile charging capabilities and robust protection features, the MAX1645BEEI+T is well-suited for a variety of applications, including:

• Portable consumer electronics
• Handheld devices
• Medical and healthcare equipment
• Portable power banks