Integrated inrush current limiter circuit and method
A technology of a limiter circuit and inrush current, applied in circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc., can solve the problem of increasing the manufacturing cost of circuit cards, circuit cards and components Manufacturers struggle to benefit from issues such as economies of scale
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[0012] In the figures, elements with the same reference number have the same function.
[0013] FIG. 1 is a simplified schematic diagram of a hot swappable circuit card 10, the circuit card 10 is used to be inserted into a SUPP = 48.0 Volts and / or unplugged from the distribution power bus 11 between the 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 out 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 about 4 amps. In one embodiment, capacitor 13 ha...
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