Integrated Power Sequencer Circuit for Regulated Startup
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Solution Overview
Problem
Existing power management devices require additional external circuitry for sequencing power regulators, increasing system complexity and cost, and face challenges in controlling power supply during initial power-up before regulated power sources are available.
Innovation Solution
A self-contained power management device with integrated sequencers and voltage networks that allow for flexible selection of output voltage and sequencing, using a few external components, where the sequencer outputs can modify voltage networks and control power regulators to enable or disable them based on predefined voltage thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If additional external circuitry is used for sequencing power regulators, then power sequencing control is achieved, but system complexity and cost increase
Solution Approach 1:
The patent combines the sequencer and voltage networks into a single integrated power management device that controls multiple power regulators. The sequencer internally generates control signals and the voltage networks (resistor dividers) are integrated within the device to provide reference voltages, eliminating the need for separate external sequencing circuitry and reducing overall system complexity.
Solution Approach 2:
The integrated power management device performs multiple functions: it sequences the startup of power regulators, controls their shutdown, provides reference voltages through integrated voltage networks, and monitors system state. This multi-functional approach replaces what would traditionally require multiple separate components, reducing both complexity and cost.
2Extent of automation
If additional external circuitry is used for sequencing power regulators, then power sequencing control is achieved, but manufacturing cost increases
Solution Approach 1:
By integrating the sequencer, voltage networks, and power regulator control functions into a single device, the patent reduces the total component count. This integration lowers manufacturing costs by reducing assembly steps, minimizing the bill of materials, and simplifying the manufacturing process while maintaining full sequencing functionality.
Solution Approach 2:
The universal power management device that handles sequencing, voltage reference generation, and regulator control in one package reduces per-unit costs through economies of scale and simplified production, making the solution more cost-effective than using multiple specialized components.
3Extent of automation
If external circuitry is used to control power supply during initial power-up, then sequencing is achieved, but control challenges remain before regulated power sources are available
Solution Approach 1:
The sequencer within the integrated device automatically generates the necessary control signals and voltage references during initial power-up using only the unregulated input voltage. The integrated voltage networks self-regulate to provide stable reference voltages without requiring external regulated power sources, enabling reliable sequencing from the moment power is applied.
Solution Approach 2:
The device performs preliminary voltage regulation and sequencing operations using the unregulated input voltage before the main power regulators are activated. The integrated voltage networks establish stable reference voltages in advance, ensuring that when power regulators are switched on, they receive proper control signals immediately, eliminating startup control challenges.
Data Source
AI summary
The present invention provides a self-contained power management device, such as a power management IC or an IC including power management functions, which allow sequenced start up of power supplies without the need for an external sequencer and with a simple user configurable arrangement.