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 14):
The flyback converter of  claim 12 , wherein the controller operates the flyback converter in a critical conduction mode and the controller generates the control signal to extend the on-duration of the synchronous rectifier for the second on-duration within the switching cycle in response to detecting the secondary current reaching a zero current value.

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): 0.8519066403475761
- 35 USC 102 Novelty (BERT): 0.6178523956727806
- Combined Prediction Score: 0.8285012158800966
- Mean Citation Score: 446.281148
- Max Citation Score: 589.254
- Similarity Product: 521.79808771348

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