US 11,808,792 B2
Multi-level voltage detector
Keliu Shu, Frisco, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Dec. 28, 2019, as Appl. No. 16/729,339.
Claims priority of provisional application 62/809,071, filed on Feb. 22, 2019.
Prior Publication US 2020/0271700 A1, Aug. 27, 2020
Int. Cl. G01R 15/00 (2006.01); G01R 19/00 (2006.01); H02M 1/00 (2006.01)
CPC G01R 19/0084 (2013.01) [H02M 1/0009 (2021.05); G01R 15/002 (2013.01); G01R 19/0023 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A circuit, comprising:
a resistor divider circuit coupled between an input terminal and a ground terminal, the resistor divider circuit having divider outputs;
a switch circuit having a switch circuit output, switch circuit inputs, and switch control terminals, the switch circuit inputs coupled to the divider outputs;
a comparator having a first input coupled to a voltage reference, a second input coupled to the switch circuit output, and a comparator output; and
a control circuit having a control input, switch control outputs, and a current control output, the control input coupled to the comparator output, the switch control outputs coupled to the switch control terminals, and the control circuit configured to, responsive to a state of the comparator output:
set respective states of the switch control output; and
provide a control signal representing a power converter reference current at the current control output responsive to a state of the comparator output.