PATENT CLAIM ANALYSIS

Application Number: 15971629
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["363", "021140"]

Abstract:
A flyback converter implements a Forced Zero Voltage Switching (ZVS) timing control by detecting a positive current excursion of the secondary winding current as the synchronous rectifier turn off trigger. The synchronous rectifier switch is turned on near the end of the switching cycle or the on duration is extended to develop a current ripple on the secondary winding current. The control circuit of the flyback converter detects a positive current excursion on the secondary winding current to turn off the synchronous rectifier and to start the next switching cycle. At this point, the voltage across the primary switch has been discharged and the primary switch can be turned on with zero drain-to-source voltage. In other embodiments, zero voltage switching for the off-transition of the primary switch is realized by coupling a capacitor across the primary switch or by coupling a capacitor across the primary winding, or both.

Claim (Index 2):
The flyback converter of  claim 1 , wherein the positive current detect circuit senses the secondary current during the second on-duration and generate the detection signal in response to detecting the secondary current having a non-zero positive current value during the second on-duration, and in response to the detection signal, turning off the synchronous rectifier within the switching cycle.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 93.0
- Lexical Diversity: 2.13514
- Patent Class: 363.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15334170', '15334173', '15007262', '15944815', '15662301']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8521860009850274
- 35 USC 102 Novelty (BERT): 0.6164845783627136
- Combined Prediction Score: 0.8286158587227961
- Mean Citation Score: 446.281148
- Max Citation Score: 589.254
- Similarity Product: 516.7473289064169

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

Dataset: test