Power Delivery Controller Interrupts for Dead Battery Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Charging of a battery in electronic devices may not proceed effectively due to delays in activation times between components when an AC adapter is connected, leading to incorrect power reception recognition and subsequent failure to charge the battery in a Dead Battery state.
Innovation Solution
The electronic device incorporates a power delivery controller and an embedded controller that manage power transfer and charging through a Type-C port, using interrupt signals to accurately determine and respond to changes in power reception conditions, ensuring proper charging by differentiating between 5V/3A and 20V/3A power inputs, even when the device is in a Dead Battery state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an AC adapter is connected to charge a dead battery, then power transfer should begin immediately, but charging fails due to activation time delays between components
Solution Approach 1:
The power delivery controller is configured to detect power reception conditions and generate interrupt signals before the embedded controller is fully activated. This preliminary detection and signal generation ensures that charging parameters are prepared in advance, allowing the embedded controller to resume processing seamlessly once activated, thereby preventing charging failures due to activation delays.
2Stability of the object's composition
If the embedded controller waits for full activation before processing power status, then system stability is maintained, but power reception changes are not recognized timely
Solution Approach 1:
The power delivery controller performs preliminary detection of power reception conditions and generates interrupt signals in advance, storing the power status information. When the embedded controller becomes active, it can immediately process the pre-captured power status data without waiting for real-time detection, thus maintaining system stability while achieving timely recognition of power reception changes.
3Adaptability or versatility
If the system uses standard USB power detection, then compatibility is maintained, but higher power inputs (20V/3A) are not correctly distinguished from standard power (5V/3A)
Solution Approach 1:
The power delivery controller continuously monitors power reception conditions and compares the detected voltage and current values against predefined thresholds for different power modes. This feedback mechanism enables the system to accurately distinguish between standard USB power (5V/3A) and higher power inputs (20V/3A), while maintaining compatibility through standardized detection protocols. The controller adjusts charging parameters based on this feedback to optimize charging performance.
Data Source
AI summary
According to one embodiment, an electronic device includes a power delivery controller and an embedded controller. The power delivery controller supplies a first signal to the embedded controller when reception of a power from an external device is started, and supplies a second signal to the embedded controller when a first value of the power from the external device is changed. The embedded controller acquires first data from the power delivery controller when the first signal is supplied in an activation time, acquires a second value of the power to be received from the external device from a power circuit, and acquires second data from the power delivery controller when the first value indicated by the first data is different from the second value.