PATENT CLAIM ANALYSIS

Application Number: 16243309
Application Type: Utility
Filing Date: 2019-01
Publication Date: 2019-08
Patent Classification: ["363", "021160"]

Abstract:
A power controller provides open-circuit protection for a power supply when an open circuit occurs between a ground end of an auxiliary winding and an input ground. The power controller provides a PWM signal to determine an ON time and an OFF time of a power switch connected in series between an input voltage and the input ground. A deviation detector in the power controller detects a winding voltage at a floating end of the auxiliary winding during the ON time, and asserts an open protection signal when a variation of the winding voltage during the ON time fits a first predetermined condition, so as to keep the power switch turned OFF and provide the open-circuit protection.

Claim (Index 7):
A control method for providing open-circuit protection when an open circuit occurs between a ground end of an auxiliary winding and an input ground, wherein the control method is in use of a power controller of a power supply, the power supply includes a transformer with a primary winding, the auxiliary winding and a secondary winding, the power controller controls a power switch connected in series with the primary winding between an input voltage and the input ground, the auxiliary winding has the ground end and a floating end, while the ground end is for connecting to the input ground and the floating end connects to a feedback node via a resistor, and the secondary winding is for providing an output voltage and an output ground, the control method comprising:\n providing a PWM signal to control the power switch and to regulate the output voltage, wherein the PWM signal determines an ON time and an OFF time of the power switch; detecting, via the feedback node, a winding voltage at the floating end of the auxiliary winding; checking if the winding voltage has a variation fitting a first predetermined condition during the ON time; and asserting an open protection signal if the variation fits the first predetermined condition, to stop the PWM signal generator from providing the PWM signal and to keep the power switch turned OFF.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 99.0
- Lexical Diversity: 2.21818
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15692562', '15949118', '12911448', '15982965', '13798148']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7758755316282607
- 35 USC 102 Novelty (BERT): 0.4776882246466559
- Combined Prediction Score: 0.7460568009301003
- Mean Citation Score: 187.209482
- Max Citation Score: 198.63899
- Similarity Product: 158.00161307820738

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test