US 12,176,807 B2
Spread spectrum adaptive on time voltage converter
Junwen Zhang, Shanghai (CN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Oct. 6, 2023, as Appl. No. 18/482,050.
Application 18/482,050 is a continuation of application No. 17/865,744, filed on Jul. 15, 2022, granted, now 11,817,777.
Prior Publication US 2024/0030810 A1, Jan. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 1/44 (2007.01); H02M 3/156 (2006.01); H04B 1/69 (2011.01)
CPC H02M 1/44 (2013.01) [H02M 3/156 (2013.01); H04B 1/69 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A circuit for varying a switching voltage converter on-time, the circuit comprising:
a first transistor having first and second current terminals and a first control terminal, the first current terminal coupled to an output voltage terminal;
a capacitor having first and second capacitor terminals, wherein the first capacitor terminal is coupled to the second current terminal;
a second transistor having third and fourth current terminals and a second control terminal, wherein the third current terminal is coupled to the second current terminal, and the fourth current terminal is coupled to the second capacitor terminal;
a current source coupled between the second capacitor terminal and a ground terminal, wherein the current source is configured to provide a current varying linearly between a first current value and a second current value;
a comparator having first and second comparator inputs and a comparator output, wherein the first comparator input is coupled to the fourth current terminal; and
a logic circuit having a logic input and a logic output, wherein the logic input is coupled to the comparator output, and the logic output is coupled to the second control terminal.