MIC2086-LBQS

PMIC - Hot Swap Controllers

The MIC2086-LBQS is a hot swap controller designed with control and protection integrated into a monolithic device. This integrated product helps system designers create cost-effective applications with less complexity and reliable power management. It provides the protection, diagnostics, and control necessary to protect the load or system in Power over Ethernet (PoE) applications, such as connected home, factory automation, and Ethernet-controlled lighting.

Features

• Integrated MOSFET controller and power transistor in one package
• Programmable overvoltage/undervoltage protection
• Programmable overcurrent protection
• Construct Hot Swap power management part
• Programmable hysteresis
• UV/OV Reset
• Enable/Disable control
• Wide wide operating temperature range
• Internal loop compensation
• Integrated external temperature sensor

Application Fields

The MIC2086-LBQS is a general-purpose hot swap controller that is suitable for a variety of applications including:

• Ethernet connected home
• Factory automation
• Dawn to dusk lighting
• Power over Ethernet (PoE) systems
• Battery monitoring and management systems
• Lighting control systems
• Computer and industrial power supplies
• Solar and wind power systems
• Peak load control systems

Working Principle

The MIC2086-LBQS works by monitoring the power line and providing protective switching to prevent overvoltage, undervoltage, and overcurrent conditions. The controller uses an internal current sensing MOSFET to detect line or load current levels and provides an adjustable trip threshold. When the current threshold is exceeded, the controller will activate the output signals to indicate an overcurrent event and automatically shut down power to the system load.

The MIC2086-LBQS also provides overvoltage and undervoltage protection which prevents unexpected output voltage excursions from damaging downstream components. The device includes a hysteresis function that monitors the input voltage and provides an adjustable overvoltage and undervoltage trip threshold. When the input voltage exceeds either of these thresholds, the controller will activate the output signals to indicate an overvoltage/undervoltage event and shut down power to the system load.

The reset function is triggered by the UV and OV thresholds, providing system protection by rebooting the system when either of these events are detected. Additionally, an integrated external temperature sensor can be used to monitor the device temperature and trigger the reset function if the temperature exceeds the programmed threshold.

The MIC2086-LBQS supports up to four logic-level enable/disable control signals, allowing system designers to configure the controller using a variety of digital logic levels. When the enable control signals are low, the output state of the MIC2086-LBQS will remain disabled regardless of current, voltage, or temperature conditions. This feature can be used to provide a power-off function or provide additional control to the system.

Conclusion

The MIC2086-LBQS is a hot swap controller that provides the protection and management necessary for applications that require robust power management. It features integrated MOSFET controllers, programmable protection thresholds, integrated external temperature sensors, and multiple enable/disable control signals. It is suitable for a variety of applications including Ethernet connected home, factory automation, dawn to dusk lighting, PoE systems, and battery monitoring systems.