Inrush current control circuit for pluggable modules, pluggable modules

Abstract

The application relates to a surge current control circuit of a pluggable module and a pluggable module. The pluggable module is connected to the female connector of the inserted electronic device through the gold finger connector. The gold finger connector includes the traditional gold finger and the added gold finger arranged side by side. The added gold finger is located on the edge of the gold finger connector. The traditional The gold finger is located on the inner side of the gold finger connector. The traditional gold finger and the added gold finger respectively contain one or more traditional power contacts and one or more increased power contacts for transmitting power signals. The circuit includes a load Switch and pull-down resistor, the input terminal of the load switch is connected to one or more additional power contacts, one or more traditional power contacts; the enable terminal of the load switch is connected to any traditional power contact; the pull-down resistor is connected to the load The enable end of the switch is connected. The application circuit can effectively suppress the generation of surge current when the module is inserted into and pulled out of the device, so as to avoid the influence on the power supply network of the device.

Description

technical field [0001] The application belongs to the technical field of communication, and in particular relates to a surge current control circuit of a pluggable module and a pluggable optical module. Background technique [0002] As a fully functional electronic product, a pluggable module is composed of various components such as integrated circuit chips, transistors, resistors, capacitors, and inductors. Due to the use of decoupling capacitors, the entire circuit usually presents a capacitive load to the equipment power supply. Features, when the module is inserted into the device and the device is powered on, a large inrush current will easily be generated due to the charging of the decoupling capacitor. If it is not effectively controlled, it may cause a large drop in the power network voltage of the device, causing abnormal operation or even damage. [0003] The more common surge current control methods for pluggable optical modules are as follows: connect a PMOS tra...

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Problems solved by technology

[0004] With the rapid increase of communication rate and port density, the usage of double-density golden finger type optical modules is increasing, such as double-density four-channel small form-factor pluggable package (Quad Small Form-factor Pluggable-DoubleDensity, QSFP-DD), dual Small Form-factor Pluggable-Double Density (SFP-DD), etc., because the gold finger connector is divided into two columns of additional gold fingers (Additional pads) and traditional gold fingers (Legacy pads), each column is There are several power contacts, and there is a gap between the two rows of contacts, so this type of optical module will go through the process of power on, power off, and power on when it is inserted into the device, and it will go through the process of power off, power on, and power off when the device is pulled out , because there are two consecutive power-on processes in a short period of time, the above-mentioned common inrush current control methods cannot effectively control the inrush current on such modules

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