US 11,742,759 B2
Voltage converter with loop control
Junjie Mai, Beijing (CN); Weibing Jing, Beijing (CN); and Jian Guo, Beijing (CN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Dec. 22, 2020, as Appl. No. 17/130,775.
Prior Publication US 2022/0200457 A1, Jun. 23, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 1/15 (2006.01)
CPC H02M 3/1584 (2013.01) [H02M 1/15 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A voltage converter system, comprising:
a switch coupled to an inductor, and configured to switch between first and second states responsive to a control signal;
calibration circuitry that includes:
an integrator having first and second integrator inputs and an integrator output, wherein the first integrator input is coupled to a feedback terminal providing a feedback voltage, and the second integrator input is coupled to a reference terminal providing a reference voltage, the integrator including:
an error amplifier having an amplifier output and first and second amplifier inputs, wherein the first amplifier input is coupled to the feedback terminal, and the second amplifier input is coupled to the reference terminal;
a capacitor coupled between the first amplifier input and the integrator output;
a first enable switch coupled between the feedback terminal and the first amplifier input, wherein the first enable switch is controlled by an enable signal;
a second enable switch coupled between the amplifier output and the integrator output, wherein the second enable switch is controlled by the enable signal; and
a disable switch coupled between the first amplifier input and the second amplifier input, wherein the disable switch is controlled by a disable signal; and
output circuitry coupled to the integrator output, wherein the output circuitry is configured to provide a calibration signal proportional to the integrator output;
wherein the calibration signal is set to a particular value for a particular time responsive to a transient occurring from a first load condition of the voltage converter system to a second load condition of the voltage converter system; and
control circuitry coupled to the calibration circuitry, wherein the control circuitry is configured to provide the control signal responsive to a combination of the feedback voltage, the reference voltage, the calibration signal, and a periodic signal.