US 12,261,540 B2
Dual mode charge control method
Bo-Ruei Peng, Taoyuan (TW); Chang-Chung Lin, Taoyuan (TW); Yu-Jen Lin, Taoyuan (TW); and Chia-Hsiong Huang, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Jan. 19, 2023, as Appl. No. 18/156,911.
Claims priority of application No. 202211203502.5 (CN), filed on Sep. 29, 2022.
Prior Publication US 2024/0113636 A1, Apr. 4, 2024
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 3/00 (2006.01)
CPC H02M 3/33592 (2013.01) [H02M 1/0009 (2021.05); H02M 3/01 (2021.05)] 11 Claims
OG exemplary drawing
 
1. A dual mode charge control method, configured for controlling an output voltage of a load coupled to a circuit with a resonance tank, the method comprising steps of:
detecting an input voltage of the resonance tank, a resonance current of the resonance tank, an output current of the load, and an output voltage of the load,
performing a single-band charge control when determining a light-load condition or a no-load condition of the load according to the output current,
compensating the output voltage to generate an upper threshold voltage in the single-band charge control, and acquiring a resonance voltage by calculating the resonance current by a resettable integrator,
comparing the resonance voltage and the upper threshold voltage to generate a first control signal, wherein when the resonance voltage is greater than or equal to the upper threshold voltage, the resettable integrator is reset,
generating a second control signal complementary to the first control signal by a pulse-width modulation duplicator, and
providing the first control signal and the second control signal to respectively control a first power switch and a second power switch of the resonance circuit.