DC-to-DC converter with transient suppression

Details DC-to-DC converter with transient suppression DC-to-DC converter with transient suppression

2000-05-02

2001-09-04

Wong, Peter S. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S284000, C323S224000, C323S225000

Reexamination Certificate

active

06285175

ABSTRACT:

BACKGROUND
1. Field
The invention relates to direct-current (DC) to direct-current (DC) converters and, more particularly, to DC-to-DC converters with transient suppression.
2. Background Information
Direct-current to direct-current converters are well-known in the art. Such circuitry or devices are typically employed to convert from one DC voltage signal level to another DC voltage signal level. This may be useful in a variety of environments. A number of such converters are well-known.
One such converter is referred to as the Buck Converter. This converter configuration may be employed to convert from a high voltage, such as, for example, 48 volts, to a low voltage, such as, for example, 2 volts. As this example illustrates, this reduction in voltage is a reduction of at least an order of magnitude in voltage level. Several problems may arise in a circuit where a reduction in voltage this large is employed. It would be desirable if a circuit to accommodate such a large drop in voltage were available.
SUMMARY
Briefly, in accordance with one embodiment of the invention, a DC-to-DC converter includes: a first circuit to sense when the converter output voltage occurs outside a substantially pre-determined range, and a second circuit to adjust the converter load current, based at least in part, upon a signal provided by the first circuit.
Briefly, in accordance with another embodiment of the invention, a circuit to suppress voltage transients for use in a DC-to-DC converter having a primary inductor includes: another circuit inductance lower than the inductance of the primary inductor. The another circuit inductance is coupled in the circuit to be activated when the load voltage of the DC-to-DC converter occurs outside a substantially predetermined range. The another circuit inductance is further coupled in the circuit so that it has the capability to modify the load current during activation.


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