MCU-Based 6-Channel Power Sequencer

Modern mid- to high-end programmable logic controllers (PLCs) utilize powerful FPGAs or SoCs to enhance industrial automation equipment. This design addresses the complex power sequencing requirements of these components by integrating a general-purpose MCU with discrete DC/DC regulators featuring integrated power MOSFETs. The result is a highly scalable power sequencing system suitable for a wide range of FPGA and SoC applications. This approach ensures flexibility, and ease of use, and minimizes the risk of implementation failures, making it an ideal solution for industrial automation power management.

System Benefits​:

• Supports a wide input voltage range from 4.5V_DC to 24V_DC for versatile power supply options.
• Utilizes discrete DC/DC regulators for easy implementation.
• Features a compact MCU in a 30-pin package for space-efficient control.
• DataFlash enables non-volatile data storage of parameters.
• Offers flexible, programmable delays for power On/Off events.
• Monitors main input voltage via the MCU's ADC.
• Reads Power Good signals of each DC/DC converter.
• Provides redundant monitoring of power rails with an MCU-integrated 10-bit ADC to detect supply rail variations.