PATENT CLAIM ANALYSIS

Application Number: 16303259
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-07
Patent Classification: ["363", "021160"]

Abstract:
A rectifying element is connected to an auxiliary winding. The shut-down circuit receives a bias voltage output from the rectifying element. A shut-down circuit stops supply of power to a power supply terminal of the power supply control IC when the bias voltage is less than a set voltage. A power supply control IC controls a ratio of on-time to a switching cycle of the switching element, based on a current sensing voltage generated at a current sense resistor. The power supply control IC causes the switching operation of the switching element to stop when a voltage at the power supply terminal decreases to a stop voltage or less.

Claim (Index 1):
A switching power supply circuit, comprising:\n a first rectifying element connected to an alternating-current power supply; a first capacitor configured to smooth a direct-current voltage rectified by the first rectifying element; a transformer having a primary winding, a secondary winding, and an auxiliary winding; an activation resistor connected to a node between one end of the first capacitor and one end of the primary winding; a switching element configured to switch the direct-current voltage from the first capacitor to be supplied to the primary winding; a power control circuit configured to control the switching element; a second capacitor having one end connected to the activation resistor and a power supply terminal of the power control circuit; a current sense resistor configured to detect a magnitude of a primary current flow through the primary winding; a second rectifying element connected to the auxiliary winding; and a shut-down circuit configured to receive a bias voltage output from the second rectifying element, wherein when the bias voltage is greater than or equal to a set voltage, the shut-down circuit outputs a voltage based on the bias voltage to the power supply terminal, and when the bias voltage is less than the set voltage, the shut-down circuit stops supply of power to the power supply terminal, the power control circuit being configured to:\n control a ratio of on-time to a switching cycle of the switching element, based on a current sensing voltage generated at the current sense resistor; and \n cause the switching element to stop switching operation when the voltage at the power supply terminal decreases to a stop voltage or less.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 98.0
- Lexical Diversity: 2.3
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14321056', '13413661', '14669532', '10695741', '15548131']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8306285220312716
- 35 USC 102 Novelty (BERT): 0.4943674376841274
- Combined Prediction Score: 0.7970024135965572
- Mean Citation Score: 277.01254400000005
- Max Citation Score: 289.7475
- Similarity Product: 259.74353702366346

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

Dataset: test