Power managing device of electronic peripheral card

Abstract

The power supply managing device for electronic peripheral card includes one function module, one interface bus, one bus bridging unit, one power supply memory unit, one outer power supply input unit and one power supply control unit. The power supply control unit controls the bus bridging unit, the outer power supply input unit and the power supply memory unit, so that the bus bridging unit provides the interface power to the functional device and charges the power supply memory unit, the bus bridging unit provides the interface power directly to charge the power supply memory unit, the outer power supply input unit provides the outer power supply to the functional device and charges the power supply memory unit, or the outer power supply input unit charges directly the power supply memory unit optionally.

Description

technical field [0001] The invention relates to a power management device, in particular to a power management device for an electronic peripheral card. Background technique [0002] Press, with the advancement of electronic technology, various electronic devices have become increasingly miniaturized, such as notebook (Notebook) computers, palm-sized (Palm) computers or personal digital assistants (PDA), etc., such small electronic devices Because it can be carried around and has powerful computing and processing capabilities, it can provide users with great convenience. However, due to their small size, such small electronic devices are generally only provided with basic processing circuits. For other additional circuits Modules, for example, additional memory, modem, local area network card, etc., are to realize related functions by inserting corresponding small electronic peripheral cards. This kind of electronic peripheral cards has at least one functional module and suc...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, the functional modules of the above-mentioned electronic peripheral cards use the power on the interface to maintain and operate. However, the power on the interface is extremely limited, so when the functional modules are used for GPRS, wireless network, or When using communication modules such as GPS, it will cause insufficient power supplied to the electronic peripheral card and cannot operate. For example, the CF interface bus can provide a maximum current of 75 milliamps (mA) at 3.3 volts and 25 degrees. At 5V and 25 degrees, it can provide a current of 100mA, but the driving current required by the current integrated packet radio service (GPRS) module is as high as 300 (mA)

Images