Intelligent Semiconductor Switch Pin Reduction via Pulse Pattern
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Solution Overview
Problem
Existing intelligent semiconductor switches require multiple pins for setting operating parameters, increasing the cost and complexity of chip packages, especially for applications where multiple parameters need to be set simultaneously.
Innovation Solution
A semiconductor component and method that integrates a half-bridge with a logic circuit capable of generating control signals for semiconductor switches based on a state control signal, allowing for the setting of operating parameters using a pulse pattern of an input signal, thereby reducing the need for separate pins by utilizing a single input pin for parameter setting during inactive periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate pins are used for setting each operating parameter, then each parameter can be set independently and reliably, but the number of pins increases, increasing chip package cost and complexity
Solution Approach 1:
The input terminal is designed to serve dual purposes: it functions as a control signal input during active mode and as a parameter setting input during inactive mode. This multi-functionality eliminates the need for separate parameter setting pins, reducing pin count while maintaining reliable parameter configuration capability.
Solution Approach 2:
The system dynamically switches between different operational modes (active mode and inactive mode) to perform different functions through the same input terminal. During inactive mode, the terminal accepts parameter setting signals; during active mode, it accepts control signals for switching operation. This dynamic mode switching enables parameter setting without requiring additional dedicated pins.
2Device complexity
If a single input pin is used for parameter setting during inactive periods, then the pin count is reduced and cost is lowered, but the system must manage mode switching and parameter setting timing complexity
Solution Approach 1:
The system utilizes periodic inactive periods between switching operations to accept parameter setting signals. During these predetermined inactive intervals, the input terminal is configured to receive and process parameter configuration signals. This periodic timing structure simplifies the control logic compared to continuous parameter setting, as the system knows when to expect parameter updates without requiring complex interrupt handling or continuous monitoring.
Solution Approach 2:
Parameter settings are configured during inactive mode before the active switching operation begins. This preliminary configuration ensures that all parameters are properly set and latched before the switching sequence starts, preventing interference between parameter setting and switching operations. The system prepares the operating parameters in advance during the inactive period, making the subsequent active operation straightforward and reliable.
Data Source
AI summary
A description is given below of an intelligent semiconductor switch and also a method for operating an intelligent semiconductor switch integrated in a chip package. In accordance with one exemplary embodiment, the method comprises, in a first mode, in which a state control signal having a first logic level is received at a control terminal of the chip package, driving a first and a second semiconductor switch of a half-bridge in accordance with an input signal received at an input terminal of the chip package. In a second mode, in which a state control signal having a second logic level is received at the control terminal of the chip package, the method comprises setting an operating parameter depending on a pulse pastern of the input signal received at the input terminal.