Single Inductor Dual Output DC-DC Boost Converter Based on Voltage Intermodulation Suppression
A technology of DC-DC and boost converter, which is applied in the direction of output power conversion device, adjusting electric variable, converting DC power input to DC power output, etc. And other issues
Active Publication Date: 2019-05-17
XIDIAN UNIV
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Problems solved by technology
[0004] Since the single-inductance dual-output converter with ordered power distribution is a dual-input dual-output control in terms of control mode, when one input and one output voltage change, the duty cycle of the two controls will change at the same time, and finally The other output voltage changes at the same time. In practical applications, this will cause crosstalk between the downstream system and the system connected to the converter, which will greatly limit the use of the converter.
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Embodiment 1
[0062] See figure 2 , figure 2 A schematic diagram of a circuit structure of a single-inductance dual-output DC-DC boost converter based on voltage intermodulation suppression provided by an embodiment of the present invention. The converter 10 includes: an input terminal V in , power stage circuit, system control circuit, logic and drive circuit and the first output terminal V out1 , the second output terminal V out2 The system control circuit includes a first control loop and a second control loop, the first control loop includes a first dynamic compensation unit, a ramp generator and a first comparator, and the second control loop Including a second compensation unit, a current detection circuit, a slope compensation circuit and a second comparator; wherein,
[0063] The converter 10 also includes a first feedforward detection circuit, a second feedforward detection circuit and a logic control circuit; the input terminal of the first feedforward detection circuit is e...
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The invention relates to a single inductance dual output DC-DC step-up converter based on voltage intermodulation suppression. The converter includes: an input terminal (Vin), a power stage circuit, a system control circuit, a logic and drive circuit, a first output terminal (Vout1), and a second output terminal (Vout2); the system control circuit includes a first control loop road and a second control loop, the first control loop includes a first dynamic compensation unit, a ramp generator and a first comparator, the second control loop includes a second compensation unit, a current detection circuit, and a ramp A wave compensation circuit and a second comparator; wherein, the converter (10) also includes a first feedforward detection circuit, a second feedforward detection circuit and a logic control circuit. In the embodiment of the present invention, the feedforward technology is used to indirectly detect the change of the two output loads, and the first dynamic compensation unit is controlled by the logic control circuit to dynamically adjust the system feedback loop, so that the intermodulation phenomenon of the two outputs is greatly suppressed.
Description
technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a single-inductance dual-output DC-DC boost converter based on voltage intermodulation suppression. Background technique [0002] Single-inductor multi-output DC-DC converter is one of the hot research directions of DC-DC converter in recent years. Its control methods are mainly divided into two categories: time-division multiplexing and orderly power distribution. Among them, the converter using the orderly power distribution control method has the advantages of high conversion efficiency and strong output load capacity, but at the same time, it has the disadvantage of serious output voltage intermodulation effect. The intermodulation effect refers to the phenomenon that when the load of one of the converters changes suddenly, the output voltage of this channel is disturbed, and the other output branches of the converter are disturbed at the same time. ...
Claims
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IPC IPC(8): H02M3/158
CPCH02M3/1584H02M3/1586
Inventor 刘帘曦周逸阳廖栩锋沐俊超朱樟明
Owner XIDIAN UNIV