Buck Converter Ton Pulse Profiling for SoC Power Trimming
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Solution Overview
Problem
Microcontrollers face challenges in maintaining low power modes due to interactions with sensors and peripherals, leading to increased power consumption and limited operational time, despite existing power management protocols.
Innovation Solution
A system that uses a count of Ton pulses in a buck converter to determine power requirements for devices, adjusting the duration of Ton pulses to optimize power delivery and reduce consumption, integrated within a System on Chip (SoC) architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power mode switching is used to reduce microcontroller power consumption, then power usage decreases, but operational time is limited due to peripheral interactions
Solution Approach 1:
The system uses feedback from Ton pulse counting to dynamically adjust power management decisions. The controller monitors the number of Ton pulses required to charge the output capacitor and uses this information to determine actual power requirements, enabling adaptive power mode selection that extends operational time while maintaining low power consumption.
Solution Approach 2:
The system changes operational parameters by measuring Ton pulse duration and frequency to determine power requirements. By adjusting the Ton pulse width modulation parameters based on measured power needs, the system optimizes power delivery efficiency and extends battery operational time in low power modes.
2Power
If Ton pulse duration is increased to deliver more power, then power delivery capability improves, but power consumption increases
Solution Approach 1:
The system dynamically adjusts Ton pulse duration based on actual power requirements determined through pulse counting. Rather than using fixed pulse widths, the controller adapts the Ton parameter in real-time to match the measured power needs of connected devices, optimizing the balance between power delivery capability and power consumption.
Solution Approach 2:
The buck converter system performs self-characterization by counting its own Ton pulses and using this information to determine power requirements. This self-service approach enables the system to automatically optimize power delivery without external intervention, adjusting pulse duration to deliver exactly the required power without waste.
Data Source
AI summary
A system for determining a power requirement for a device powered by a buck converter on a system on chip based on Time on pulses (Ton) is disclosed. A buck converter supplies output voltage to enable the device. The buck converter is driven by a Ton pulse generator generating Ton pulses to control charging of a load capacitor. A counter counts the Ton pulses during the supply of output voltage while the device is enabled. A controller is coupled to the counter and the buck converter. The controller determines the power requirement for the device based on the count of the Ton pulses. The power requirement may be used to adjust the trim value to change the width of the Ton pulses for greater energy efficiency.