Power Converter Controller Single External Programming Terminal
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Solution Overview
Problem
Switch mode power converters require additional pins and increased power consumption for each added function, leading to higher costs and inefficiencies in output regulation.
Innovation Solution
A power converter controller with a single external programming terminal that allows programming of multiple functions, decoupling external programming circuitry during normal operation to minimize power consumption and share common circuit components for multiple functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional pins are added to the power converter controller for each function, then functionality is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a single external terminal that can be configured to perform multiple different functions through programming. The terminal can alternatively provide output regulation, remote on/off control, latch reset, or extended shutdown delay functionality depending on configuration, eliminating the need for separate dedicated pins for each function.
2Adaptability or versatility
If additional pins are added to the power converter controller for each function, then functionality is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements a single external terminal that can be configured to perform multiple different functions through programming. The terminal can alternatively provide output regulation, remote on/off control, latch reset, or extended shutdown delay functionality depending on configuration, eliminating the need for separate dedicated pins for each function.
3Ease of operation
If external programming circuitry remains connected during normal operation, then programming capability is maintained, but power consumption increases
Solution Approach 1:
The patent employs a coupling switcher that dynamically connects or disconnects the external programming terminal from the internal programming interface circuit based on operational mode. During normal operation, the switcher disconnects the terminal to minimize power consumption, while during startup or fault conditions, it connects the terminal to enable programming functionality.
Data Source
AI summary
A power converter controller is disclosed. An example controller includes a control circuit coupled to receive a feedback signal representative of an output of the power converter. The control circuit coupled to control a switching of a power switch of the power converter in response to the feedback signal to control a transfer of energy from an input of the power converter to the output of the power converter. An internal programming interface circuit is coupled to the control circuit. A coupling switcher is coupled to the internal programming interface circuit. An external programming terminal is selectively coupled to the internal programming interface circuit through the coupling switcher. An external programming circuit coupled to the external programming terminal is coupled to the internal programming interface circuit through the coupling switcher during a startup programming condition and during a fault condition of the power converter. The external programming circuit that is coupled to the external programming terminal is decoupled from the internal programming interface circuit by the coupling switcher during a normal operating condition of the power converter.