US 12,137,503 B2
Systems and methods for improving transient response in slew-rate limited H-bridge buck-boost drivers
Suresh Hariharan, Livermore, CA (US); and Ron Vincent Ocampo, San Jose, CA (US)
Assigned to Maxim Integrated Products, Inc., San Jose, CA (US)
Filed by Maxim Integrated Products, Inc., San Jose, CA (US)
Filed on Apr. 13, 2023, as Appl. No. 18/134,459.
Application 18/134,459 is a continuation of application No. 18/131,407, filed on Apr. 6, 2023.
Claims priority of provisional application 63/332,899, filed on Apr. 20, 2022.
Claims priority of provisional application 63/413,541, filed on Oct. 5, 2022.
Claims priority of provisional application 63/441,377, filed on Jan. 26, 2023.
Prior Publication US 2023/0344340 A1, Oct. 26, 2023
Int. Cl. H05B 45/37 (2020.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/32 (2007.01); H02M 3/158 (2006.01); H05B 45/36 (2020.01); H05B 45/3725 (2020.01); H05B 45/375 (2020.01); H05B 45/38 (2020.01)
CPC H05B 45/375 (2020.01) [H02M 1/0009 (2021.05); H02M 1/0012 (2021.05); H02M 1/0058 (2021.05); H02M 1/083 (2013.01); H02M 1/32 (2013.01); H02M 3/158 (2013.01); H02M 3/1582 (2013.01); H05B 45/36 (2020.01); H05B 45/3725 (2020.01); H05B 45/38 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A average current mode control circuit for driving a load with a constant current, the circuit comprising:
a sensing circuit that in response to sensing a load current generates a sensing signal;
a first error amplifier coupled receive the sensing signal and output a voltage at a voltage node that is coupled to a second error amplifier;
a compensation circuit removably coupled to the voltage node via a switch; and
a detection circuit coupled to the switch and comprising:
a zero-current detection circuit that, in response to detecting a zero current causes the switch to disconnect the compensation circuit from the voltage node to enable the first error amplifier to provide a first voltage to the second error amplifier, which increases a charging current in a capacitor to reduce a dead time in the load current; and
an overcurrent detection circuit that, in response to detecting an overcurrent causes the switch to disconnect the compensation circuit from the voltage node to enable the first error amplifier to provide to the second error amplifier a second voltage to decrease the charging current and reduce an overshoot.