MAX14680EWC+T

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PMIC (Power Management Integrated Circuit), is a common electronic component which manages power input to different electronic devices. A wide variety of PMICs are available in the market, each one designed to perform specific functions in order to serve new and ever-changing technologies. Batter management PMICs are designed to regulate, protect and monitor a system’s main lithium ion (Li-ion)/lithium polymer (LiPo) battery. The MAX14680EWC+T is an example of such PMICs.

The MAX14680EWC+T provides the necessary support to integrate battery management functions into industrial, consumer and Internet of Things (IoT) battery-powered solutions. It is a single-chip battery-management solution, capable of providing system-level power-supply and charge management, plus cell-level diagnostics and protection. This PMIC allows users to significantly reduce their time-to-market by reducing system cost and design complexity, through integration and leveraging the expertise of Maxim Integrated Products.

The application field for the MAX14680EWC+T PMIC is wide and varied, due to its comprehensive system-level feature set offering an optimized, cost-effective solution. It is ideal for high power applications like cellphones, tablets, and even wearables. This battery-management PMIC is compliant with the IEEE 802.3bt standard, the latest PoE standard, and provides support for 4-pair PSE and PD configurations.

The underlying working principle of the MAX14680EWC+T PMIC is to provide 100% system-level fault detection, protection, and monitoring for Li-ion/LiPo batteries in mobile, industrial, and IoT applications. It features a robust system-level dual-loop architecture, micro-power battery-management firmware, a microcontroller-based power-supply architecture, and a 4-pair Power-over-Ethernet (PoE) controller.

The MAX14680EWC+T PMIC is designed for system-level battery life extension and improved battery safety. It supports both single-cell and multicell configurations, enables optimum charging and discharging, and provides up to 10A of current delivery from a single I2C-addressable device. Additional features such as Ultra-Light Sleep Mode, ON/OFF LED and LED dimming, low-power buzzer control, on-chip real-time clock, programmable power-supply, and OTP memory further facilitate the integration and reduce time-to-market.

The Monitoring capabilities offered by this battery-management PMIC are at the core of its operation. Monitors continuously track critical conditions such as current, instantaneous and average power, charge and discharge cycles, and health/age information during charging and discharging cycles. Also, the programmable low-power architecture allows for fewer active components, meaning fewer battery cycles compounding time periods before the embedded software has to check and intervene.

In order to protect the cells, the MAX14680EWC+T PMIC actively monitors the battery cells for temperature, voltage, and current. In case a fault condition is detected, the PMIC will initiate protective actions, setting the appropriate safety flags in order to prevent further damage to the system. The system can be designed to use two separate pre-determined levels of protection to identify potential fault conditions. The first level is discharge-over-current protection, and the second level is over-temperature protection.

The high-performance power-supply microcontroller (PSMC) implemented at the heart of this PMIC includes micro-code to support system-level power-supply control and design optimization. The PSMC is configured to optimize efficiency and reliability. It is also responsible for managing the battery-charging capabilities of the PMIC, which include charge-current regulation and current-voltage monitoring. The software employed to program the hardware is compatible with various operating systems and development environments, making it easy to use.

The MAX14680EWC+T PMIC features a 4-pair PoE controller, providing power-over-Ethernet in accordance with the IEEE 802.3bt standard. This allows for low-power, low latency communication with a battery management system over Ethernet. With this feature, the system can access real-time data for battery status, including current and voltage, allowing for more accurate fault detection. In addition, this feature can be leveraged to accurately estimate remaining battery life and provide predictive maintenance for the system.

The MAX14680EWC+T PMIC is a powerful and cost-effective solution for industrial, consumer, and IoT battery-powered applications. It provides 100% system-level fault detection, protection, and monitoring, plus a robust system-level dual-loop architecture. Moreover, it features a micro-power battery-management firmware, a microcontroller-based power-supply architecture, and a 4-pair PoE controller compatible with the IEEE 802.3bt standard. Finally, the software employed to program this PMIC is also compatible with various operating systems and development platforms.

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