Power Supply Control Circuit for Selective Voltage Activation
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Solution Overview
Problem
Conventional system power supply ICs that output multiple voltages require a control device to be operational for voltage control, leading to unnecessary power consumption and increased costs when only specific voltages are needed, as all power supply voltages are activated using a common enable signal.
Innovation Solution
A power supply control circuit that includes a gate circuit and switch units to generate a common enable signal based on control and selection signals, allowing activation of power supply voltages without the control device during system startup and prioritizing control operations by the control device during normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a common enable signal is used to activate multiple power supply circuits, then all power supply voltages can be output simultaneously, but power consumption increases when only specific voltages are needed
Solution Approach 1:
The patent divides the power supply control into two independent parts: a first enable signal for activating power supply circuits and a second enable signal for controlling voltage output. This segmentation allows selective activation of specific power supply voltages without requiring all circuits to be active, thereby reducing power consumption while maintaining the ability to output multiple voltages when needed.
Solution Approach 2:
The patent introduces dynamic control through two independently controllable enable signals that can be adjusted based on system requirements. The first enable signal controls the activation state of power supply circuits, while the second enable signal controls the output state of voltage signals. This dynamic control mechanism allows the system to adapt power consumption to actual needs by activating only necessary circuits and outputs at any given time.
2Ease of operation
If the control device is activated to control power supply voltage output, then control operations can be performed, but power consumption increases when the control device is not needed
Solution Approach 1:
The patent enables the power supply control circuit to operate autonomously through the second enable signal that can be generated independently of the control device. When the control device is in a non-operational state, the second enable signal can still control the output of power supply voltages based on pre-configured conditions or simple logic, allowing the system to serve itself without requiring continuous control device operation and thereby reducing power consumption.
3Adaptability or versatility
If multiple power supply circuits are activated simultaneously, then multiple power supply voltages can be output, but cost increases compared to individual mounting
Solution Approach 1:
The patent implements a universal power supply control circuit that can control multiple power supply circuits through a unified dual-enable signal mechanism. Instead of requiring separate control circuits for each power supply voltage, the system uses a single control structure that can selectively activate any combination of power supply circuits and outputs. This multi-functional approach reduces the number of control components needed, simplifies the overall system architecture, and lowers manufacturing costs while maintaining the ability to output multiple voltages simultaneously or individually as required.
Data Source
AI summary
A power supply control circuit is connected to and controls a system power supply IC. The system power supply IC has multiple power supply circuits and is capable of outputting multiple power supply voltages. The system power supply IC activates the multiple power supply circuits at one time using a common enable signal. The power supply control circuit includes a gate circuit and a first switch unit. The gate circuit generates the common enable signal based on a control signal and a selection signal. The control signal is output from a control device during a usual operation. The selection signal is a signal that selects one of the multiple power supply circuits which is required to output the power supply voltage. The first switch unit is driven by a power-on signal during system activation, and switches on or off the selection signal input to the gate circuit.