Integrated surge current limiter circuit and method
A technology of limiter circuit and inrush current, applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc. issues of sex
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[0012] In the figures, elements with the same reference numbers have the same function.
[0013] FIG. 1 is a simplified schematic diagram of a hot swappable circuit card 10 for use when operating at a supply voltage V SUPP = 48.0 Volts during plugging and / or unplugging from the electronic system while power is applied between distributed power bus 11 and ground node 12 . The power bus 11 and the ground node 12 can simultaneously provide power to other components (not shown) of the electronic system.
[0014] A large filter capacitor 13 smoothes noise spikes on the power bus 11 to provide a stable bias voltage. The circuit performing the function of the circuit card 10 is represented as a load 15 which draws a load current I from the power bus 11 through an inrush current limiter circuit 20 LOAD . In one embodiment, load 15 includes a voltage regulator that obtains I LOAD = 10.0 amps of load current as a peak through capacitor 13 and load 15 . I LOAD A typical average is ...
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