Power Supply Device Dynamic Voltage Adjustment for Wireless Terminals
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Solution Overview
Problem
Traditional data card power supply systems fail to dynamically adjust output power in response to changing loads, leading to power consumption and heat dissipation issues, and require excessive CPU resources and physical space due to inefficient communication between the power supply and CPU.
Innovation Solution
A power supply device with an Inter Integrated Circuit (IIC) bus interface that connects the CPU to a DC power converter, power amplifier, and envelope detection device, allowing for real-time adjustment of output voltage based on envelope curves and reducing the number of CPU I/O ports needed through multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-chip DC power converter is used to supply power to baseband and RF working units, then the structure is simple and cost is low, but the output power cannot dynamically adapt to load changes and cannot automatically adjust in real time
Solution Approach 1:
The patent introduces an envelope detection device that dynamically detects the envelope signal of the power amplifier output and feeds it back to the CPU. The CPU then dynamically adjusts the power supply output voltage according to the detected envelope signal, enabling the power supply to adapt in real-time to load changes. This transforms the static single-chip DC power converter into a dynamic system that can respond to varying power demands.
Solution Approach 2:
The patent implements a feedback mechanism where the envelope detection device continuously monitors the power amplifier output and sends the envelope signal back to the CPU. The CPU uses this feedback information to adjust the power supply output voltage, creating a closed-loop control system that automatically adapts to load changes without requiring complex hardware reconfiguration.
2Ease of operation
If CPU GPIO ports are used for power supply parameter detection and control, then communication is achieved, but the number of I/O ports increases dramatically and system complexity increases
Solution Approach 1:
The patent makes the CPU's I/O ports multi-functional by using them for both general-purpose data processing and power supply control. The envelope detection device converts the power amplifier envelope signal into control signals that can be processed by the existing CPU I/O interface, allowing the same ports to serve multiple purposes: normal data communication and power supply management.
Solution Approach 2:
The envelope detection device acts as an intermediary that translates the power amplifier's analog envelope signal into a form that the CPU can process through its existing I/O ports. This intermediary component enables communication between the power supply system and CPU without requiring dedicated specialized ports, thus reducing the total number of I/O ports needed.
3Power
If traditional power supply management is used, then basic power delivery is achieved, but real-time monitoring and centralized management of core components is lacking
Solution Approach 1:
The patent implements real-time monitoring by having the envelope detection device continuously detect the power amplifier output envelope and feed this information back to the CPU. This feedback loop enables the CPU to monitor the actual power consumption in real-time and make immediate adjustments to the power supply output, enhancing system reliability and preventing power-related failures.
Solution Approach 2:
The power supply system performs self-service through the automated feedback mechanism. The envelope detection device and CPU work together to automatically detect power demands and adjust the power supply output without external intervention. This self-regulating capability improves reliability by ensuring the power supply continuously adapts to actual system needs.
Data Source
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AI summary
The present invention provides a power supply device, a method for managing power supply thereof and a wireless communication terminal. The wireless communication terminal includes a baseband working unit, a RF working unit and a DC power converter connected with the baseband working unit and the RF working unit, further including a power supply device, a CPU and an envelope detection device; the power supply device is configured to receive a voltage supplied by the DC power converter, supplying an output voltage to a PA in the RF working unit, receiving a control signal sent from CPU, adjusting the output voltage according to the control signal, so that the output voltage meets the envelope variation curve of the output signal of the PA; the envelope detection device is configured to detect the envelope signal of output signal of the PA in real time and send the envelope signal to the CPU; the CPU is configured to receive the voltage supplied by the DC power converter, convert the envelope signal sent by the envelope detection device into a control signal and send the control signal to the power supply device. With the scheme of the present invention, the power consumption and heat dissipation problems of the PA can be solved.