COMPUTER POWER SUPPLY SYSTEM HAVING SWITCHED REMOTE VOLTAGE SENSING AND SENSE VOLTAGE AVERAGING FOR HOT PLUGGABLE ADAPTER CARDS

摘要

In computer systems where the adapter card can be "hot plugged" into the I / O bus connector, the series connection's resistors and "voltage feedback" switches have voltages at the power pins of each I / O connector and at the output port of the power supply. It is connected between the power input port to adjust. Another resistor with a resistance greater than each resistor connected to the I / O connector is connected between the input and output ports of the power supply, providing voltage feedback when the power supply to all I / O connectors is switched off. Adjust the output voltage. Power to the individual I / O connectors is turned off before the adapter card is plugged into or disconnected into the I / O connector, and immediately after the card is plugged into the connector. Each voltage feedback switch is turned on by the controller shortly after the power to the I / O connector is switched on, and each feedback switch is turned off just before the power to the I / O connector is turned off. When a power supply is turned on at one or more I / O connectors, the voltage at the input port of the power supply is the average of the voltages at the power pins of the turned on I / O connectors. With this switched feedback arrangement, the average supply voltage of the individual I / O connectors is kept within a marginal error of "specification", and the voltage deviation at any I / O connector can be minimized from the "specification".