Primary Side Voltage Signal Generation for Insulated Load Control
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Solution Overview
Problem
Existing load driving devices face challenges in effectively utilizing primary side voltage information for controlling loads on the secondary side, especially when the primary side voltage varies, as they often rely on secondary side voltage feedback without direct information from the primary side.
Innovation Solution
A semiconductor device is introduced on the primary side that generates voltage information signals based on the primary side voltage, using signal generation circuits with comparators and current generation circuits, and integrates a voltage dividing resistor on a single semiconductor substrate, allowing for insulated transmission of this information to the secondary side using photo couplers or transformers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage information from the primary side is transmitted to the secondary side using insulated transmission, then load control precision is improved, but device complexity increases due to additional signal generation circuits and isolation components
Solution Approach 1:
The patent integrates the voltage dividing resistor and signal generation circuit onto a single semiconductor substrate, merging multiple previously separate components into one unified device. This reduces the overall system complexity while maintaining the capability to generate accurate voltage information signals for insulated transmission to the secondary side.
Solution Approach 2:
The patent introduces a voltage dividing resistor as an intermediary element that scales down the primary side voltage to a level suitable for signal generation. This intermediary component enables accurate voltage information extraction without requiring the secondary side to directly handle high primary side voltages, thus improving measurement precision while managing system complexity.
2Device complexity
If a voltage dividing resistor and signal generation circuit are integrated on a single semiconductor substrate, then component count is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The voltage dividing resistor and signal generation circuit are fabricated together on a single semiconductor substrate using standard semiconductor manufacturing processes. This integration reduces the total component count and eliminates the need for separate mounting and wiring, while the manufacturing precision is managed through established semiconductor fabrication techniques that ensure consistent performance.
3Adaptability or versatility
If primary side voltage information is used for load control, then adaptability to voltage variations is improved, but reliability decreases due to additional failure points in the signal generation and transmission path
Solution Approach 1:
The patent implements a feedback mechanism where voltage information from the primary side is continuously monitored and transmitted to the secondary side for real-time load control adjustments. This feedback loop enables the system to adapt to voltage variations dynamically, and the use of insulated transmission ensures that the feedback path does not compromise system reliability through galvanic isolation.
Solution Approach 2:
The insulated transmission components act as intermediaries that transfer voltage information from the primary side to the secondary side without creating direct electrical connections. This mediation maintains reliability by preventing fault propagation between sides while still enabling adaptability through accurate voltage information transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise control of loads on the secondary side by transmitting primary side voltage information, allowing for adaptive control strategies that maintain consistent load operation despite variations in primary side voltage, reducing component count and failure rates.
Implementation Method 1
a voltage dividing resistor configured to divide the primary side voltage to obtain the input voltage
Implementation Method 2
a plurality of comparators configured to compare the input voltage with a plurality of reference voltages, and the signal generation circuit may be further configured to generate the voltage information signal according to a result of the comparison of each of the comparators
Implementation Method 3
transmitting this information to the secondary side using photo couplers or transformers
Data Source
AI summary
A semiconductor device disposed on a primary side of a system generating a secondary side voltage in an insulated form from a primary side voltage includes: a signal generation circuit configured to generate a voltage information signal for transmitting voltage information based on the primary side voltage to a secondary side of the system in the insulated form.