Silergy Semiconductor Technology (Hangzhou) Ltd

Kaiwei Yao

Chen Zhao

Wang Zhang

Zhiwei Xu

Chiqing Fang

An inductor current reconstruction circuit of a power converter can include: a switching current sampling circuit configured to acquire at least one of a current flowing through a main power transistor and a current flowing through a rectifier transistor to generate a switching current sampling signal; an inductor current generating circuit configured to generate a reconstruction signal representing an inductor current in one complete switching cycle; and where the reconstruction signal comprises the switching current sampling signal and a current analog signal generated according to the switching current sampling signal and an inductor voltage signal representing a voltage across an inductor in the power converter.

Inductor current reconstruction circuit, power converter and inductor current reconstruction method thereof

An integrated driver applied to a voltage converter having a switched capacitor conversion circuit, the integrated driver including: a first die having a first-type power transistor; a second die including at least one second-type power transistor, where a withstand voltage of the first-type power transistor is higher than a withstand voltage of the second-type power transistor; and where the first die and the second die are coupled in series between a high potential terminal and a low potential terminal of the voltage converter, such that the first-type power transistor receives a high voltage signal.

Integrated driver and voltage converter

A power converter can include: N switching power stage circuits, where output terminals of the N switching power stage circuits are connected in parallel, and N is a positive integer; an energy storage element coupled between an input terminal and the output terminal of the power converter, where the energy storage element is configured to periodically store energy for delivery to the output terminal of the power converter; and where after a main transistor of an M-th switching power stage circuit is turned off, a main transistor of the (M+1)-th switching power stage circuit is turned on, in order to realize zero-voltage-switching (ZVS) of the main transistor of (M+1)-th switching power stage circuit, where M is a positive integer less than N.

Power converter with switching power stage circuits connected in parallel

A driving circuit and a driving method are provided. The driving circuit includes an energy-storage capacitor, a first power converter and a bidirectional converter. An output port of the first power converter is coupled to a load and the energy-storage capacitor. The energy-storage capacitor is connected in parallel with the load. The bidirectional converter is coupled between the load and the energy-storage capacitor. The first power converter supplies power to the load during a light load interval. During at least a part of the light load interval, the first power converter charges the energy-storage capacitor via the bidirectional converter. During a heavy load interval, the first power converter supplies power to the load and the energy-storage capacitor supplies power to the load via the bidirectional converter. The driving circuit is applicable to drive a load requiring low average power and high peak power.

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Hangzhou, China

Kaiwei Yao