DC-DC Converter Amplifier Supply Compensation for Lower Power Loss
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Solution Overview
Problem
As high-capacity battery technology advances, the increasing battery and adapter voltages lead to higher input voltages for DC-DC converters, resulting in increased power loss due to higher power supply voltages applied to amplifiers within these converters.
Innovation Solution
A DC-DC converter design incorporating a power compensator that adjusts the power supply voltage to the amplifier, using transistors, diodes, and resistors to control the voltage applied, thereby reducing power loss even when input voltages increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the input voltage of the DC-DC converter increases to support higher battery capacity and fast charging, then the power supply voltage applied to the amplifier increases, but the power loss of the amplifier increases
Solution Approach 1:
The patent changes the parameter of power supply voltage applied to the amplifier by introducing a compensation voltage that adjusts the actual power supply voltage based on the input voltage level. When input voltage increases, the compensation voltage reduces the amplifier's power supply voltage to maintain optimal operating conditions and minimize power loss.
Solution Approach 2:
The patent introduces a compensation voltage as an intermediary element between the input voltage and the amplifier's power supply voltage. This compensation voltage acts as a mediator that decouples the direct relationship between input voltage and amplifier power supply voltage, allowing independent optimization of each.
2Loss of energy
If the power supply voltage to the amplifier is reduced to decrease power loss, then power consumption is reduced, but the amplifier may not operate normally
Solution Approach 1:
The patent dynamically adjusts the power supply voltage parameter to the amplifier based on operating conditions. By changing this parameter adaptively rather than using a fixed voltage, the system maintains reliable operation across different input voltage conditions while minimizing power loss.
Solution Approach 2:
The patent implements a feedback mechanism where the compensation voltage is generated based on the actual input voltage level. This feedback ensures that the amplifier receives an appropriate power supply voltage that maintains normal operation while optimizing power efficiency under varying input conditions.
Data Source
AI summary
A DC-DC converter includes a first switching element, a second switching element, a first amplifier, a second amplifier, a Pulse Width Modulation (PWM) controller, an output inductor and a power compensator. The second switching element is connected to the first switching element. The first amplifier outputs a first switching control signal to control the first switching element. The second amplifier outputs a second switching control signal to control the second switching element. The PWM controller generates a control signal applied to input terminals of the first amplifier and the second amplifier. The output inductor includes a first terminal connected to the first switching element and the second switching element and a second terminal outputting the pixel power supply voltage. The power compensator receives an input voltage and adjusts a power supply voltage applied to a power supply terminal of the first amplifier.