US 11,955,896 B2
Bias power regulator circuit for isolated converters with a wide output voltage range
Pei-Hsin Liu, Westford, MA (US); Richard Lee Valley, Nashua, NH (US); and Bharath Balaji Kannan, Merrimack, NH (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Mar. 3, 2022, as Appl. No. 17/686,376.
Application 17/686,376 is a division of application No. 16/596,954, filed on Oct. 9, 2019, granted, now 11,271,483.
Claims priority of provisional application 62/746,876, filed on Oct. 17, 2018.
Prior Publication US 2022/0190730 A1, Jun. 16, 2022
Int. Cl. H05B 45/37 (2020.01); G06F 1/26 (2006.01); G06F 13/42 (2006.01); H02M 1/08 (2006.01); H02M 3/335 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/33523 (2013.01) [G06F 1/266 (2013.01); G06F 13/4282 (2013.01); H02M 1/08 (2013.01); H05B 45/37 (2020.01); G06F 2213/0042 (2013.01); H02M 1/0009 (2021.05); H02M 1/0032 (2021.05)] 7 Claims
OG exemplary drawing
 
1. An isolated converter comprising:
a power transformer having a primary winding, a secondary winding, and an auxiliary winding;
a first switch coupled to the primary winding;
a switch controller coupled to the first switch; and
a bias power regulator coupled to the auxiliary winding and the switch controller, the bias power regulator including a second switch, and the bias power regulator configured to provide a bias supply output voltage to the switch controller responsive to: a set of modes that modulate a switching frequency of the second switch; and a forward mode in which the second switch is off.