US 12,244,239 B1
Multi-channel alternating current conversion circuit, power supply apparatus and electronic device
Wanglong Xiong, Guangdong (CN)
Assigned to Shenzhen Segre Electronic Co., Ltd., Shenzhen (CN)
Filed by Shenzhen Segre Electronic Co., Ltd., Guangdong (CN)
Filed on Oct. 30, 2024, as Appl. No. 18/931,851.
Claims priority of application No. 202422507961.3 (CN), filed on Oct. 16, 2024.
Int. Cl. H02M 5/45 (2006.01); H02M 1/32 (2007.01); H02M 3/335 (2006.01); H02M 5/458 (2006.01)
CPC H02M 5/4585 (2013.01) [H02M 1/32 (2013.01); H02M 3/33523 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A multi-channel alternating current (AC) conversion circuit, comprising:
an AC input terminal configured to input an AC voltage;
an AC-AC conversion unit comprising a thyristor voltage reduction circuit, a no-load freewheeling voltage stabilizing circuit and a first AC output terminal, the AC input terminal being connected to an input terminal of the thyristor voltage reduction circuit and an input terminal of the no-load freewheeling voltage stabilizing circuit, respectively; an output terminal of the thyristor voltage reduction circuit and an output terminal of the no-load freewheeling voltage stabilizing circuit being connected to an output terminal of the first AC output terminal, respectively; and the no-load freewheeling voltage stabilizing circuit being configured to keep a voltage of the first AC output terminal stable through resistor-capacitor voltage reduction and voltage division under no-load conditions;
an AC-AC voltage reduction unit, the AC input terminal being connected to an input terminal of the AC-AC voltage reduction unit, and the AC-AC voltage reduction unit being configured to reduce the input AC voltage to obtain reduced AC voltage and output the reduced AC voltage; and
an AC-DC voltage reduction unit, the AC input terminal being connected to an input terminal of the AC-DC voltage reduction unit, and the AC-DC voltage reduction unit being configured to convert the AC voltage from the input terminal into a DC voltage and output the DC voltage.