SIMO Converter Transient Enhancement for Load Voltage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing single inductor multiple output (SIMO) converters are susceptible to voltage undershoot, overshoot, and cross-regulation during load transient events, which can cause damage and performance degradation in small electronic devices.
Innovation Solution
A transient enhancement loop (TEL) is introduced in the SIMO converter, comprising a code generator and current sources that detect load transient events and adjust output voltages by activating source or sink transistors to compensate for voltage undershoot or overshoot, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing SIMO converter design is used, then device complexity is kept simple, but voltage undershoot and overshoot occur during load transient events
Solution Approach 1:
The code generator detects load transient events and activates current sources in advance to compensate for voltage undershoot and overshoot before they occur. The transient enhancement loop proactively adjusts output voltages by activating source or sink transistors based on detected transient conditions, preventing voltage instability rather than reacting after it occurs.
Solution Approach 2:
A transient enhancement loop is introduced as an intermediary component between the existing SIMO converter and the loads. This loop includes a code generator and current sources that mediate the voltage output, detecting transient events and injecting compensating currents to stabilize voltages without fundamentally redesigning the entire converter structure.
2Reliability
If load transient events are detected and compensated, then voltage stability is improved, but device complexity increases due to additional components
Solution Approach 1:
The transient enhancement loop is segmented into distinct functional components: a code generator for detecting transient events and a set of current sources with source and sink transistors for compensation. Each component has a specific function, allowing the system to achieve complex transient response capabilities through modular, manageable segments rather than a monolithic complex structure.
Solution Approach 2:
The current sources in the transient enhancement loop serve multiple functions: they can compensate for both voltage undershoot and overshoot conditions, work with multiple output voltages simultaneously, and adapt to different load transient events. This multi-functionality reduces the need for separate dedicated circuits for each compensation scenario, managing complexity through versatile components.
Data Source
AI summary
A single inductor multiple output (SIMO) converter includes an inductor, a plurality of output switches, and a transient enhancement loop (TEL). The inductor includes an input terminal and an output terminal. A plurality of output switches may include respective input terminals and output terminals. The input terminals may be electrically connected to the inductor output terminal. The output terminals may be electrically connected to respective loads. The TEL includes a code generator and a plurality of current sources. The code generator may detect a load transient event and activate at least one of the current sources. The current sources include respective source transistors and sink transistor electrically connected to respective output terminals of the output switches. The source transistors may be electrically connected to a source voltage. The sink transistors may be electrically connected to a ground terminal.