High-power supply based on multi-phase PWM controller

A controller and power tube technology, used in control/regulation systems, output power conversion devices, conversion of DC power input to DC power output, etc. problems such as low efficiency, to achieve good start-up performance, improved dynamic response, and high conversion efficiency

Inactive Publication Date: 2012-07-04
BEIJING RES INST OF TELEMETRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing receivers all use directly packaged power modules, generally using matching front-end filters and output filter circuits, which have the characteristics of large size, high cost, and low conversion efficiency, and the packaged modules are not good for user testing and adjustment. It is also difficult to dissipate heat
In view of the limitation of the size and overall characteristics of the receiver system, the direct use of the existing high-power power supply module cannot meet the requirements, and heat consumption is also a problem when installed in the product

Method used

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  • High-power supply based on multi-phase PWM controller
  • High-power supply based on multi-phase PWM controller
  • High-power supply based on multi-phase PWM controller

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Embodiment Construction

[0016] The present invention adopts the Linear Technology LTxxxx control chip to build a high-power power supply. The power supply is centered on a two-phase synchronous PWM controller, and externally builds energy storage components such as inductors, capacitors, and power MOSFETs to realize user-adjustable switching frequency, which can be programmed up to 500KHz. It is a soft-start function with over-current Protection, under-voltage lockout function, remote control, flat appearance, 200W high-power step-up power supply that can achieve up to 98% conversion efficiency.

[0017] Such as figure 1 Shown is a schematic diagram of the power supply of the present invention, which is mainly composed of a PWM controller, energy storage devices (inductance L and capacitance C) and power MOSFETs. When the PWM controller has an external input, once the protection circuit at the RUN terminal is activated and released, the normal soft-start sequence starts to act. In the PWM controller...

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Abstract

A high-power supply based on a multi-phase PWM (Pulse Width Modulation) controller comprises the multi-phase PWM controller, an input capacitor Cin, a soft-start capacitor C, an output capacitor Cout, resistors R1 to R7, a power tube M1, a power tube M2, an inductor L1, an inductor L2, a diode D1 and a diode D2. The supply provided by the invention is designed on the basis of the multi-phase PWM controller and facilitates implementing a high-power low-voltage DC power supply; the adopted devices are common RC (Resistance-Capacitance) inductive and MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) devices; compared with a power supply module with the same power, the adopted RC inductive devices have small sizes, the demands on both peripheral output capacitors and output inductors are lowered, the power density is increased, heat dissipation is more convenient in comparison with a well packaged power supply module, and the conversion efficiency is high; and power supplies conforming to various different application environments can be constructed through selection of suitable devices, and the comprehensive performance of the power supplies are optimized simultaneously.

Description

technical field [0001] The invention relates to a high-power power supply, which is suitable for supplying power to an external power amplifier when a navigation receiver transmits signals. Background technique [0002] In the practical application of a new generation of navigation receivers, its external power amplifier needs to be supplied with high voltage and high current power. [0003] Existing receivers all use directly packaged power modules, generally using matching front-end filters and output filter circuits, which have the characteristics of large size, high cost, and low conversion efficiency, and the packaged modules are not good for user testing and adjustment. It is also more difficult to dissipate heat. In view of the limitation of the size and overall characteristics of the receiver system, the direct use of the existing high-power power supply module cannot meet the requirements, and the heat consumption installed in the product is also a problem. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
Inventor 谢伍瑶李斌杨雄军陆红
Owner BEIJING RES INST OF TELEMETRY
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