Digital Open Pin Detection for Multi-Stage Power Interfaces
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Solution Overview
Problem
Conventional open pin detection methods require external components and are not feasible for high impedance pins or pins shared by multiple power stages, leading to challenges in detecting open conditions in power delivery systems with variable numbers of power stages.
Innovation Solution
An integrated circuit system with a controller and power stages that utilize a digital communication bus to perform serial or parallel open pin detection by switching reference voltages across interface pins, using window comparators and status registers to identify open conditions without additional external components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional open pin detection methods are used, then detection capability is provided, but external components are required and it is not feasible for high impedance pins or pins shared by multiple power stages
Solution Approach 1:
The patent extracts the open pin detection functionality from external components and implements it internally within the integrated circuit. The detection circuit is integrated into the controller, eliminating the need for external resistors, capacitors, or other passive components that were traditionally required for open pin detection.
Solution Approach 2:
The patent creates a universal open pin detection mechanism that works across multiple pin types and configurations. The detection circuit can handle high impedance pins, shared pins among multiple power stages, and various pin configurations without requiring different external components, making it universally applicable.
2Adaptability or versatility
If open pin detection is implemented for high impedance pins and shared pins, then detection feasibility is improved, but system complexity increases
Solution Approach 1:
The patent implements a self-service detection mechanism where the controller automatically performs open pin detection without requiring external assistance or complex external circuitry. The integrated detection circuit autonomously monitors pin states, including high impedance and shared pins, using internal resources only.
Solution Approach 2:
The patent performs open pin detection as a preliminary action during system initialization or before critical operations. By detecting open conditions in advance, the system can prevent faulty operation without requiring complex real-time detection mechanisms during normal operation.
3Adaptability or versatility
If conventional detection methods are used, then simple circuit design is maintained, but detection is not feasible for variable numbers of power stages
Solution Approach 1:
The patent implements a dynamic detection system that can adapt to variable configurations of power stages. The controller dynamically adjusts its detection routine based on the actual number and configuration of connected power stages, allowing the same integrated circuit to handle any number of power stages without requiring different hardware designs.
Data Source
AI summary
Apparatuses, devices, and systems for detecting open pins are described. A controller can control at least one power stage. The controller can include a first set of interface pins, a digital communication bus and a circuit configured to switch connections between a reference voltage and the first set of interface pins. The controller can read a pin status of the at least one power stage via the digital communication bus. The pin status can indicate whether the reference voltage is detected at a second set of interface pins of the at least one power stage. The controller can, based on the pin status, detect a presence or an absence of an open pin condition between the first set of interface pins and the second set of interface pins.