PATENT CLAIM ANALYSIS

Application Number: 15865212
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["363", "021140"]

Abstract:
A flyback power converter circuit converting an input voltage to an output voltage includes a transformer, a power switch, a synchronous rectifier (SR) switch, and a secondary side control circuit. The secondary side control circuit controls the SR switch to be ON when the power switch is OFF. The secondary side control circuit includes a driving switch for controlling the SR switch, a synchronous control circuit powered by a voltage related to the output voltage, which controls the driving switch to operate the SR switch, and a clamping circuit including a clamping switch and a clamping switch control circuit. The clamping switch control circuit controls the clamping switch according to a current inflow terminal voltage of the clamping switch and/or the voltage related to the output voltage, such that, during a secondary side power-on period, an equivalent impedance of the current inflow terminal of the clamping switch is smaller than a predetermined clamping impedance.

Claim (Index 17):
The flyback power converter circuit of  claim 4 , wherein the secondary side control circuit further includes a second driving switch, coupled between the control terminal of the SR switch and a driving input voltage, wherein the clamping switch control circuit further includes:\n a first impedance control switch, coupled in series between the control terminal of the clamping switch and the first clamping resistor or the first clamping current source circuit; a second clamping resistor and/or a second clamping current source circuit; a second impedance control switch, coupled in series with the second clamping resistor or the second clamping current source circuit between the control terminal of the clamping switch and the driving input voltage, wherein the clamping current source circuit is configured to operably generate a second clamping current from the driving input voltage to the control terminal of the clamping switch; and a power determining circuit, configured to operably generate a switch control signal according to the output voltage related voltage and the driving input voltage to control the switching of the first impedance control switch and the second impedance control switch, such that in the secondary side power-on time period, the equivalent impedance of the current inflow terminal of the clamping switch is smaller than the predetermined clamping impedance.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 86.0
- Lexical Diversity: 2.81667
- Patent Class: 363.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13966248', '15147182', '12604246', '15809595', '10346807']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8412415083648471
- 35 USC 102 Novelty (BERT): 0.4991348716844819
- Combined Prediction Score: 0.8070308446968106
- Mean Citation Score: 256.97822599999995
- Max Citation Score: 264.48245
- Similarity Product: 196.16932718446256

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

Dataset: test