Power Converter Dynamic Response via Multi-Functional Pin
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DC-DC converters require additional pins and specific detection circuits to achieve real-time dynamic response, increasing the area and cost of the IC and complicating the circuit, which limits their versatility and reliability.
Innovation Solution
A power converter design that includes a ramp generating unit, two comparators, and a PWM signal generating unit, which adjusts the duty cycle of the PWM signal based on control signals related to the output voltage and reference voltage, eliminating the need for additional pins and detection circuits, and enhancing dynamic response and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional pins and specific detection circuits are added to achieve real-time dynamic response, then the transient response performance is improved, but the IC area and cost increase
Solution Approach 1:
The existing output voltage detection pin is made multi-functional by configuring it to serve both as a general output voltage detection pin and as a dynamic response detection pin. The control circuit identifies the pin as a dynamic response detection pin when it detects that the pin is configured to receive a control signal related to output voltage changes, enabling the same physical pin to fulfill multiple detection roles without requiring additional pins.
Solution Approach 2:
The control circuit automatically identifies which pin serves as the dynamic response detection pin based on the configuration and signal characteristics, without requiring external intervention or additional identification circuits. The system self-configures by detecting that the output voltage detection pin is receiving a control signal that reflects output voltage changes, thereby enabling dynamic response functionality through self-identification.
2Reliability
If additional pins and specific detection circuits are added to achieve real-time dynamic response, then the transient response performance is improved, but the IC cost increases
Solution Approach 1:
The control circuit configures the existing output voltage detection pin to serve dual purposes: general output voltage monitoring and dynamic response detection. By making the pin multi-functional and using the same pin for both purposes, the patent eliminates the need for additional detection pins and associated circuits, thereby reducing IC manufacturing cost while maintaining improved transient response performance.
3Reliability
If additional pins and specific detection circuits are added to achieve real-time dynamic response, then the transient response performance is improved, but the circuit complexity increases
Solution Approach 1:
The control circuit automatically identifies the dynamic response detection pin based on the configuration and signal characteristics without requiring external intervention or additional identification circuits. This self-identification mechanism simplifies the overall circuit architecture by eliminating the need for complex pin assignment logic or additional detection circuits, thereby reducing circuit complexity while achieving real-time dynamic response.
Solution Approach 2:
The control circuit continuously monitors the signal at the output voltage detection pin and automatically adjusts its configuration based on whether the pin is receiving a control signal that reflects output voltage changes. This feedback mechanism enables the circuit to dynamically adapt its behavior, simplifying the overall control logic while maintaining the ability to detect transient responses in real-time.
Data Source
AI summary
A power converter includes a ramp generating unit, a first comparator, a second comparator, and a pulse width modulation (PWM) signal generating unit. The ramp generating unit provides a ramp signal. The first comparator receives the ramp signal and a control signal to provide a normal operation control signal. The second comparator receives the ramp signal and the control signal to provide a dynamic response control signal. The PWM signal generating unit generates a PWM signal according to the normal operation control signal or dynamic response control signal. When the control signal is higher than a threshold of ramp signal, the second comparator provides the dynamic response control signal to the PWM signal generating unit to control it to adjust a duty cycle of the PWM signal.