A Hybrid Power Converter with High Voltage Conversion Ratio
A hybrid power supply and converter technology, which is used in conversion devices that adjust electrical variables, output power, and conversion equipment without intermediate conversion to AC, can solve the problem of inability to share the load current between two inductances, and achieve higher power consumption. Empty ratio, the effect of reducing the voltage level
Active Publication Date: 2020-11-06
SOUTHCHIP SEMICON TECH SHANGHAI CO LTD
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Problems solved by technology
[0011] The purpose of the present invention is to provide a hybrid power converter with a high voltage conversion ratio, which mainly solves the problem that the existing 1 / N switched capacitor-two-phase buck hybrid step-down converter cannot realize the equal sharing of load current by two inductors
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[0027] Such as image 3 As shown, a hybrid power converter with a high voltage conversion ratio disclosed in the present invention includes MOS transistors Q1a and Q1b whose drains are connected to the input terminal VIN, and two anodes connected to the sources of the MOS transistors Q1a and Q1b respectively. Capacitance C FLY1 、C FLY2 , the two drains are connected to the capacitor C FLY1 、C FLY2 The MOS transistors SRa and SRb connected to the negative pole of the MOS transistor SRa and SRb are connected in series. One end is connected to the drain of the MOS transistor SRa and the other end is connected to the drain of the MOS transistor SRb. The inductor L1 and L2 are connected to the common end of the inductor L1 and L2 and the other end is Grounded capacitor C1, one end of which is connected to the common end of inductors L1 and L2 and the other end of which is grounded current source Io, two MOS transistors Q2b and Q2a whose drains are respectively connected to the s...
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The invention discloses a high-voltage conversion ratio hybrid power converter, which mainly solves the problem that the existing 1 / N switched capacitor-two-phase buck hybrid step-down converter cannot realize equal sharing of load current by two inductors. The hybrid architecture power converter combines the switched capacitor converter and the two-phase interleaved parallel buck converter, which can effectively reduce the voltage level of the power tube and increase the duty cycle of the buck converter. At the same time, the switched capacitor converter adopts a two-phase structure, so that the working mode of the whole converter is completely symmetrical, and the two inductors can share the load current equally. The new switched capacitor-two-phase buck hybrid step-down converter architecture proposed by the present invention can be expanded into a 1 / N switched capacitor-two-phase buck hybrid step-down converter, which can easily meet the high conversion ratio voltage conversion requirements such as 48V to 1V. Therefore, it has high use value and promotion value.
Description
technical field [0001] The present invention relates to a hybrid power converter with high voltage conversion ratio in particular. Background technique [0002] The data center uses a large number of high-performance CPUs to complete huge data processing. The power supply voltage of this type of CPU is very low (0.6V-1.8V), and it is necessary to convert the high-voltage bus voltage of the data center to 1V / 1.2V through a step-down converter. Various voltage levels such as / 1.8V supply power to different chips. The traditional data center uses a 12V DC bus, but with the rise of big data / cloud computing / 5G technologies in recent years, the load current consumed by the CPU has increased sharply, resulting in a larger current on the 12V DC bus and a sharp increase in path loss big. In order to meet this challenge, some data centers (such as Google) have given up the 12V DC bus architecture and adopted 48V DC bus instead. The use of 48V DC bus can effectively reduce the curre...
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IPC IPC(8): H02M3/07H02M3/155H02M3/158
CPCH02M3/07H02M3/155H02M3/1584H02M1/0067H02M3/1586
Inventor 梁星
Owner SOUTHCHIP SEMICON TECH SHANGHAI CO LTD