Power supply management method and device

Abstract

The present invention is power supply managing method and device for connecting USB interface of computer and USB interface equipment, makes the USB interface power supply meet the requirements of powerful load capacity, small power supply ripple, capacity of providing instantaneous great current, etc. and makes USB interface equipment operate stable in high pulse current condition. The power supply managing method includes: 1. setting input voltage stabilizing and filtering module in the USB interface connecting end and connecting power supply to the USB interface for stabilizing voltage and filtering; 2. converting the output voltage into USB interface equipment needed operation voltage via DC / DC conversion; and 3. setting output voltage stabilizing and filtering module in the connect end of the USB interface equipment to provide the USB interface equipment with work voltage.

Description

【Technical field】 [0001] The present invention relates to a power management method and device, in particular to a power management method and device with strong load capacity, small power supply ripple coefficient, and capable of providing instantaneous high current. 【Background technique】 [0002] With the rapid development of information technology, the network and people's lives are becoming more and more closely related, and the wireless network card has been widely used because of its flexibility and the advantage of not being restricted by lines, so as to meet people's needs for surfing the Internet anytime and anywhere. At present, the commonly used wireless Internet access interfaces include PCMCIA and USB interfaces. PCMCIA wireless Internet access cards are prone to unstable performance due to heat dissipation problems, which affects the normal operation of the wireless Internet access card. The USB interface is more versatile, and there is no heat dissipation pro...

AI Technical Summary

Problems solved by technology

However, the working efficiency of the LDO power conversion scheme is low, usually its conversion efficiency is only about 60%, and the heat loss is relatively large. When the load power increases, the required input power requirements increase accordingly, and the input power provided by USB is the standard Therefore, the power obtained by using the LDO power conversion scheme is difficult to guarantee the normal needs of the load power

Moreover, the current consumption of the wireless network card is in a state of rapid change when the signal is transmitted, the signal is weak, or it is running at high speed. The instantaneous current is nearly 1.7A, and the duration is close to 500us. Provide the pulse current required for the normal operation of the wireless network card, which in turn affects the normal operation of the wireless network card

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