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1:0321

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Negative Voltage Hot Swap Controller

with Active Power Filter

Copyright © IXYS CORPORATION 2000

www.ixys.com

98716 (08/21/00)

IXYS reserves the right to change limits, test conditions and dimensions.

Active Power Filter only Evalvation Board

CAUTION: These devices are

sensitvie to electrostatic discharge;

take caution when handling and

assembling this component.

Figure 1

Figure 1

Figure 1

Figure 1

Figure 1

4C

ACTIVE POWER FILTER

Although the IXHQ100 incorporates all the functions

necessary to implement a state of the art negative voltage hot

swap, a key feature of the IXHQ100 is its Power Active

Filter.

For those size and cost sensitive applications

requiring only a Power Active Filter, the evaluation board

schematic is given in Figure 1,with bill of materials in Figure

4. Figure 2 is aripple rejection plot of the Power Active

Filter placed in the test circuit provided in Figure 3.

Some of the advantages of a Power Active Filter over

standard passive filters are:

* Significantly reduced size of the power supply bypass

capacitors.

* Eliminate magnetic noise generation by eliminating the

need for power filter inductors.

* Reduced sensitivity to power supply noise.

* Reduce size, weight, and overall system cost.