PATENT CLAIM ANALYSIS

Application Number: 16134906
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-05
Patent Classification: ["363", "021140"]

Abstract:
A ZVS (zero voltage switching) control circuit for use in a flyback power converter includes a primary side controller circuit, a secondary side controller circuit, and a pulse transformer. In one switching cycle, a synchronous rectifier transistor is turned ON twice to generate a circulation current at the primary side winding, and after the synchronous rectifier transistor is turned OFF, the power transistor is turned ON for zero voltage switching. A synchronous signal coupled between the primary side and the secondary side is employed to synchronize the power transistor and the synchronous transistor. The synchronous signal also triggers an SR-ZVS pulse to turn ON the synchronous rectifier transistor for achieving the zero voltage switching when the power transistor is turned ON.

Claim (Index 10):
A zero voltage switching (ZVS) control circuit, configured to operably control a flyback power converter, the ZVS control circuit comprising:\n a primary side controller circuit, configured to operably generate a switching signal which controls a power transformer through a power transistor to generate an output voltage; a secondary side controller circuit, configured to operably generate an SR control signal and a PWM synchronous signal, wherein the SR control signal controls a synchronous rectifier transistor, wherein the SR control signal includes an SR-control pulse and an SR-ZVS pulse, wherein the SR-control pulse controls the synchronous rectifier transistor to be ON for an SR time period; and a pulse transformer, configured to operably couple the PWM synchronous signal from the secondary side controller circuit to the primary side controller circuit to generate the switching signal; wherein before the PWM synchronous signal delivers a synchronous pulse, the synchronous rectifier transistor is turned ON for a predetermined ZVS time period by the SR-ZVS pulse; wherein when the synchronous rectifier transistor is turned OFF at the end of the SR-ZVS pulse, the PWM synchronous signal is generated to trigger the power transistor to be turned ON, to achieve zero voltage switching.

Metadata:
- Claim Count in Document: 34.0
- Percentile: 97.0
- Lexical Diversity: 2.27586
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15971629', '15989025', '15334170', '15334173', '13956298']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8373983627490477
- 35 USC 102 Novelty (BERT): 0.5065183154530518
- Combined Prediction Score: 0.8043103580194481
- Mean Citation Score: 304.663114
- Max Citation Score: 312.0288700000001
- Similarity Product: 258.6337495861847

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