AN 692: Power Sequencing Considerations for Cyclone® 10 GX, Arria® 10, Stratix® 10, Agilex™ 7, and Agilex™ 5 Devices

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ID 683725
Date 9/26/2024
Public
Document Table of Contents
Document Table of Contents x
1. Overview and Related Information
1. Overview and Related Information x
1.1. Controlled Sequence Designs 1.2. Fault Tolerance 1.3. Driving Unpowered FPGA Pins 1.4. Document Revision History for AN 692: Power Sequencing Considerations for Cyclone® 10 GX, Arria® 10, Stratix® 10, Agilex™ 7, and Agilex™ 5 Devices
1.1. Controlled Sequence Designs x
1.1.1. Programmable Power Management Controller (PPMC) 1.1.2. Low-Cost Discrete Sequencer Design
1.1.1. Programmable Power Management Controller (PPMC) x
1.1.1.1. PPMC Example Design 1.1.1.2. Multiple Supply Sequencer
1.1.2. Low-Cost Discrete Sequencer Design x
1.1.2.1. Low-Cost Sequencer Circuit Description 1.1.2.2. Low-Cost Discrete Sequencer Simulation Results
1.2. Fault Tolerance x
1.2.1. Managing Uncontrolled Loss of Power Events 1.2.2. Sequential vs. Simultaneous Power-Down 1.2.3. Voltage Regulators with Clamping Capability
1.3. Driving Unpowered FPGA Pins x
1.3.1. LVDS I/O Pin Guidance for Unpowered FPGA 1.3.2. Transceiver Pin Guidance for Unpowered FPGA 1.3.3. 3VIO Pin Guidance for Unpowered FPGA
1. Overview and Related Information

1.1.1.1. PPMC Example Design

Figure 1. Simplified Programmable Power Management Controller With Multiple Channels


A single channel of the PPMC typically provides the following features:

  • Differential sense line inputs to remotely monitor the load voltage.
  • Digital-to-Analog Converter (DAC) outputs to trim the regulator output voltages. The DAC outputs drive the regulator's feedback input (fb) and control the regulator's output voltage.
  • Enable Outputs (EN1, EN2, ...ENn) that drive the voltage regulator's Enable Inputs (en). The regulator's enable inputs control the desired power-up/down sequence.

Typically, PPMC devices have multiple channels so that a single controller can sequence multiple regulators. If more channels are required than what is offered by a single device, then multiple devices can be cascaded. A separate host interface (PMBus or I2C) is used to connect the system processor and the PPMC to manage the controller software and programming.

Consult your power module vendor for more information about PPMC.

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