Memory Power Supply Circuit for Residual Converter Discharge
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Solution Overview
Problem
Existing memory systems face challenges in efficiently transitioning to a power-off state while minimizing power consumption and reducing the risk of communication errors between non-volatile memory and memory controllers due to residual power in converters.
Innovation Solution
A power supply control circuit incorporating a backup power supply and a discharge circuit with resistors and transistors to quickly discharge residual power from converters and control circuits using power from the backup supply, ensuring timely power-off states and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If residual power in converters is not discharged, then power consumption increases and components remain in on-state, but adding complex discharge circuits increases device complexity and manufacturing cost
Solution Approach 1:
The discharge circuit uses the remaining power in the backup power supply itself to perform the discharge operation, making the system self-sufficient. The backup power supply automatically discharges residual power from converters without requiring external power sources or complex control mechanisms, thus reducing both energy loss and device complexity.
Solution Approach 2:
The backup power supply is charged in advance during normal operation, storing energy that is later used for the discharge operation. This preliminary charging action ensures that when power-off occurs, the stored energy is immediately available to discharge residual power from converters, preventing prolonged on-state without adding continuous complexity.
2Reliability
If residual power is quickly discharged, then power-off state is achieved timely and communication errors are reduced, but the discharge circuit requires higher power handling capability increasing manufacturing cost
Solution Approach 1:
The discharge circuit uses simple, low-cost components including resistors and transistors that can handle the discharge task effectively without requiring expensive, high-end components. The circuit accepts that these components will experience high stress during discharge but are replaced periodically, achieving reliable error prevention at lower manufacturing cost.
Solution Approach 2:
The discharge circuit dynamically changes resistance values through transistor control to optimize discharge speed. By varying the resistance parameter during the discharge process, the circuit achieves fast discharge for reliability while using standard, low-cost components rather than requiring expensive fixed high-power components.
3Ease of manufacture
If simple discharge circuit components are used, then manufacturing cost is reduced, but discharge speed and effectiveness may be compromised
Solution Approach 1:
The discharge circuit transitions from static to dynamic operation by using transistors to control resistance values in real-time. This dynamic adjustment allows simple, low-cost components to achieve discharge speeds comparable to complex circuits, as the resistance is optimized during the discharge process rather than being fixed at a conservative value.
Solution Approach 2:
The transistor-based discharge circuit serves multiple functions: it provides discharge resistance, enables dynamic resistance adjustment, and can be controlled by existing power management signals. This multi-functionality allows simple components to achieve complex discharge performance, reducing manufacturing cost without sacrificing discharge speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents residual power from maintaining memory components in an on-state, minimizing communication errors and reducing power consumption, while also lowering the manufacturing cost of the discharge circuit.
Implementation Method 1
a discharge circuit configured to discharge the power remaining in the second converter based on power remaining in the backup power supply
Data Source
AI summary
A memory system includes a memory controller, a non-volatile memory, and a power supply control circuit configured to receive power from an external power supply. The power supply control circuit includes a backup power supply, a first converter configured to supply power to the memory controller based on power supplied from the external power supply or the backup power supply, a second converter configured to supply power to the non-volatile memory based on power supplied from the external power supply or the backup power supply, and a discharge circuit configured to discharge the power remaining in the second converter based on power remaining in the backup power supply after the supply of power from the external power supply and the backup power supply is stopped.