Resonant switching power converter and driving circuit therein
A power converter, switchable technology, applied in the direction of output power conversion device, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problems of affecting the operation of the resonance point, complicated circuits, etc., and achieve a small number of pins Effect
Pending Publication Date: 2022-05-27
RICHTEK TECH
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Problems solved by technology
Capacitors Ccp1 and Ccp2 in this known switched resonant cavity converter must be high-voltage-resistant capacitors, and the voltage of capacitor C will be used for capacitor Ccp1, so it will affect the operation of the resonance point, and the circuit is more complicated
Method used
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Embodiment Construction
[0079] The drawings in the present invention are schematic diagrams, mainly intended to show the coupling relationship between the circuits and the relationship between the signal waveforms, and the circuits, signal waveforms and frequencies are not drawn to scale.
[0080] figure 2 It is a schematic circuit diagram showing a resonant switching power converter according to an embodiment of the present invention. like figure 2 As shown, the resonant switching power converter 20 includes a power stage circuit 201 , driving circuits 202 a and 202 b and a controller 203 . The power stage circuit 201 includes resonant capacitors C1, C3, at least one non-resonant capacitor C2, power switches Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, and resonant inductors L1, L2. The resonant switching power converter 20 includes at least one resonant cavity, such as resonant cavities 2011 and 2012, the resonant cavity 2011 has a resonant capacitor C1 and a resonant inductor L1 connected in serie...
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The invention relates to a resonant switching type power converter and a driving circuit therein. The resonant switching type power converter comprises a power level circuit and a driving circuit. The power level circuit comprises a resonant capacitor, a resonant inductor and a plurality of switches; the driving circuit includes: a plurality of drivers operating corresponding switches; and the power supply circuit is used for providing a driving power supply corresponding to the plurality of drivers. The power supply circuit comprises a voltage increasing circuit which generates an increasing power supply according to a DC voltage and an output related signal; the cross voltage of each driving capacitor corresponds to the corresponding driving power supply; and a plurality of supply diodes, the self-increasing power supplies are mutually coupled in series along the forward direction of the supply diodes, and the reverse end of each supply diode is coupled to the positive end of the corresponding driving power supply so as to charge the corresponding driving capacitor to generate the corresponding driving power supply.
Description
technical field [0001] The invention relates to a resonant switching power converter, in particular to a drive circuit capable of supporting switching power converters of different topologies and the resonant switching power converter thereof. Background technique [0002] figure 1 A known switched resonant cavity converter is shown. The known switched resonant cavity converter 10 includes a power stage circuit 101 and driving circuits 102a-102d. The driving circuits 102 a ˜ 102 d are used to drive the plurality of power switches Q1 ˜ Q10 in the power stage circuit 101 , respectively. The driving circuit 102a is used to drive the power switches Q1 and Q2, and its power supply comes from a charge pump with a high-voltage capacitor Ccp1. The driving circuit 102b is used to drive the power switches Q3 and Q4, and its power supply comes from another charge pump with a lower voltage capacitor Ccp2. The capacitors Ccp1 and Ccp2 in the known switched resonant cavity converter m...
Claims
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IPC IPC(8): H02M3/07
CPCH02M3/07H02M3/01H02M1/08H02M1/0006Y02B70/10H02M3/1584H02M1/36
Inventor 刘国基杨大勇白忠龙
Owner RICHTEK TECH