Switch Control Circuit for High Turn-On Voltage Devices
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Solution Overview
Problem
Traditional electric level conversion circuits are unable to successfully turn on electronic devices with turn-on voltages higher than the maximum convertible voltage of 5.5V, as they only generate high levels up to 5.5V.
Innovation Solution
A switch control device and method that includes a high level output unit capable of producing a high level with a predetermined amplitude higher than the traditional maximum, a logic level output unit, and a switch unit with a control terminal connected to the logic level, a first terminal connected to the ground, and a second terminal connected to a low level, which switches on or off to control the electronic device based on the logic level state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electric level conversion circuit is used to convert high level voltage, then the circuit can output a high level signal, but the maximum amplitude is limited to 5.5V which is insufficient for electronic devices requiring higher turn-on voltages
Solution Approach 1:
Instead of raising the high level voltage through conventional level conversion, the patent inverts the approach by pulling the ground terminal voltage down to a low level through the switch unit. This creates a higher voltage differential across the electronic device without requiring high voltage generation circuitry, thereby resolving the contradiction between reliable turn-on and voltage amplitude limitations.
Solution Approach 2:
The switch unit acts as an intermediary element that dynamically connects or disconnects the ground terminal from the low level voltage source. This mediator enables the system to achieve higher effective voltage for turning on the electronic device while maintaining the physical high level output within safe limits, thus expanding adaptability without compromising reliability.
2Reliability
If the ground terminal is continuously connected to low level, then the electronic device remains turned on, but energy is wasted when the device should be turned off
Solution Approach 1:
The switch unit dynamically changes the connection state of the ground terminal based on the logic level input signal. When the logic level indicates turn-on, the switch connects ground to low level, activating the device. When turn-off is required, the switch disconnects, allowing the ground terminal to float and the device to turn off. This dynamic control eliminates continuous power consumption while maintaining reliable activation control.
Solution Approach 2:
The circuit uses the logic level signal itself to control the switching action, making the system self-regulating. The same logic level that should activate the device also controls the switch unit to establish the necessary voltage conditions, eliminating the need for separate control circuitry and reducing overall energy consumption while ensuring reliable device activation.
Data Source
AI summary
The present disclosure provides a switch control device and method for electronic device, and an electronic device. The switch control device of the electronic device comprises: a high level output unit, connected with the high level input terminal and configured to output a high level with a predetermined amplitude to the high level input terminal, the predetermined amplitude higher than a predetermined voltage; a logic level output unit configured to output a logic level; and a switch unit, with a control terminal inputted with the logic level, a first terminal inputted with the ground terminal, and a second terminal inputted with a low level, and configured to connect the first terminal and the second terminal when the logic level is in a first state, in order to turn on the electronic device, and disconnect the first terminal from the second terminal when the logic level is in a second state, in order to turn off the electronic is device.