Abstract: A handle for electronic components is provided that retains the mechanical function of prior art handles and provides for integration of electronic features, such as indicator lights and associated labels, on a portion of the handle. The present handle is mechanically attached to its associated electronic package, and is also electrically connected to the electronics within the package to provide for operation of the handle's integrated electronic features. Electronic features, for example, status indicators and adjustment features, are positioned on the handle so that the features are available at the front of the component, without using space on the front panel of the electronic package. The handle is especially useful for compact, rack-mounted electronics units.

Abstract: A multiple output voltage power supply comprises a transformer having a primary winding and a plurality of secondary windings. The primary winding is adapted to have an input voltage coupled thereto. A primary side switch is coupled to the primary winding and is adapted to control power applied to the transformer in a power cycle responsive to a peak current mode control signal. A plurality of output circuits are coupled to respective ones of the plurality of secondary windings and provide respective output voltages. The plurality of output circuits each further comprises a forward rectifier adapted to rectify power during a positive portion of the power cycle and a free-wheeling rectifier adapted to rectify power during a negative portion of the power cycle. One of the plurality of output circuits further comprises a bypass switch adapted to interrupt operation of the respective forward rectifier. A secondary side post regulation circuit controls operation of the bypass switch.

Abstract: A power converter provides regulated dual outputs. The power converter includes a transformer having a primary winding, and first and second secondary windings. On a primary side of the converter, there is provided the primary winding of the transformer, and a first switch having an activation terminal, where the switch is coupled to the primary winding. A first controller has its input connected to the first output terminal of the converter and its output connected to the activation terminal of the switch. On a secondary side of the converter, there is provided first and second secondary sections. The first section includes the first secondary winding and a first inductor coupled between the first secondary winding and the first output terminal. The second section includes the second secondary winding and a second inductor coupled between the second secondary winding and the second output terminal. The first and second inductors may be magnetically coupled or independent.

Abstract: A bus bar with integrated quick-disconnect terminals for distributing electrical current from a power supply or other electronic component is disclosed. The bus bar and terminals are comprised of a single piece of copper alloy or other suitable bus bar material. The quick-disconnect terminals are blades configured to connect to industry standard receptacles. The bus bar additionally includes integral threaded inserts or other alternate means to provide direct attachment of lugs or other terminals using threaded fasteners, and pins for electrical engagement with power and ground traces on a circuit board.

Abstract: The present invention is directed to methods and systems for a power supply rack. In one embodiment, the power supply rack has a slot configured to slidably receive a power supply. The rack also has a first connector configured to mate with a first power supply connector. The rack is further provided with a key mate configured to engage a corresponding power supply key mate.

Abstract: A forward converter circuit has substantially reduced switching losses to provide greater efficiency than the aforementioned conventional circuit. A first switch is coupled to a primary winding of a transformer and adapted to selectively couple a bus voltage terminal to a first terminal of the primary winding. A second switch is coupled to the transformer and adapted to selectively couple a second terminal of the primary winding to ground. The first and second switches are triggered in response to a first periodic gate control signal. A diode is coupled between the bus voltage terminal and the second terminal of the primary winding of the transformer. A third switch is coupled to the transformer and adapted to selectively couple the first terminal of the primary winding of the transformer to ground. The third switch is triggered in response to a second periodic gate control signal. The second periodic gate control signal is substantially inverted with respect to the first periodic gate control signal.

Abstract: A power supply comprises a first power converter having respective input and output terminals, and a second power converter having respective input and output terminals. The output terminals of the first and second power converters are connected in series to provide a combined output voltage. A switch is connected to the input terminals of the first and second power converters. The switch has a first state by which the input terminals of the first and second power converters are connected in series, and a second state by which the input terminals of the first and second power converters are connected in parallel. A pulse width modulator (PWM) unit provides a drive signal to regulate current provided to the first and second power converters. A balance winding is coupled between the first and second power converters in order to share power between these two converters when their inputs are connected in series.

Abstract: A power supply comprises a first power converter having respective input and output terminals, and a second power converter having respective input and output terminals. The output terminals of the first and second power converters are connected in series to provide a combined output voltage. A switch is connected to the input terminals of the first and second power converters. The switch has a first state by which the input terminals of the first and second power converters are connected in series, and a second state by which the input terminals of the first and second power converters are connected in parallel. A pulse width modulator (PWM) unit provides a drive signal to regulate current provided to the first and second power converters. A balance winding is coupled between the first and second power converters in order to share power between these two converters when their inputs are connected in series.

Abstract: A bus bar with integrated quick-disconnect terminals for distributing electrical current from a power supply or other electronic component is disclosed. The bus bar and terminals are comprised of a single piece of copper alloy or other suitable bus bar material. The quick-disconnect terminals are blades configured to connect to industry standard receptacles. The bus bar additionally includes integral threaded inserts or other alternate means to provide direct attachment of lugs or other terminals using threaded fasteners, and pins for electrical engagement with power and ground traces on a printed circuit board.

Abstract: A single-ended DC-to-DC converter includes a power transformer having a primary winding and a secondary winding, with a primary switch and an input voltage source coupled in series with the primary winding of the transformer. The primary switch is periodically made active upon application of a control input to permit current flow through the primary winding. The primary switch further has a parasitic capacitance. In a first embodiment of the invention, a reset circuit is provided including an auxiliary switch, an auxiliary voltage source coupled to the auxiliary switch, and a diode coupled between the auxiliary switch and the secondary winding of the transformer. The auxiliary switch is made active when the primary switch is inactive.

Abstract: A power converter has a self-driven synchronous rectification circuit that can operate efficiently with a non-optimal reset secondary voltage waveform that remains at a zero voltage level during a portion of the switching cycle. The power converter circuit includes a transformer having a primary winding and a secondary winding, in which primary winding is supplied with a non-optimal reset waveform that remains at a zero voltage level for a portion of a power cycle thereof. A first synchronous rectifier is connected in series with the first end of the secondary winding and is controlled by a voltage at the second end of the secondary winding. A second synchronous rectifier is connected in series with the second end of the secondary winding, and is further connected to an output terminal of the power converter circuit through a storage choke. A saturable reactor is connected in series between the first synchronous rectifier and the first end of the secondary winding.

Abstract: The present invention is directed to methods and systems for a power supply housing system. In one embodiment, the housing assembly has a rear side and at least a first connector accessible from the rear side. The first connector has at least one pin which extends from the rear side by a first amount. A first key assembly extends from the rear side and is configured to permit the power supply to be fully inserted into a rack in a first orientation and to prevent the power supply from being fully inserted into the rack in a second orientation. A standoff assembly extends from the rear side by a second amount greater than the first amount.

Abstract: A switching power supply comprises an AC rectifier adapted to receive an AC line voltage and provide an input voltage (VIN) therefrom having a haversine waveform. A switching power converter is connected to the AC rectifier and provides a DC output voltage (VOUT) for a load. The switching power converter comprises an inductor and a power switch adapted to control current in the inductor. A pulse width modulator provides a drive signal to the power switch having a variable duty cycle to regulate current provided to the load by the switching power converter. A power factor correction circuit is adapted to control operation of the pulse width modulator so that a waveshape of the current from the AC rectifier matches the output voltage (VOUT) with changes in the input voltage (VIN) and load.

Abstract: A synchronous rectification circuit for a DC-DC power converter can operate efficiently with a primary drive voltage that remains at a zero voltage level during a portion of the power conduction cycle. The DC-DC power converter includes a primary side power circuit providing a symmetrically varying power signal that remains at a zero voltage level for a portion of a conduction cycle. A first secondary side power circuit is inductively coupled to the primary side power circuit, and has an output terminal that provides an output voltage. The first secondary side power circuit further comprises first and second synchronous rectifiers having respective activation terminals. The synchronous rectifiers are adapted to alternately activate in synchronism with non-zero voltage level portions of the conduction cycle. A second secondary side power circuit is inductively coupled to the first secondary side power circuit and has polarity reversed with respect to the first secondary side power circuit.

Abstract: A novel resonant DC-to-DC converter has a source of direct current which is switched through a primary inductor, or the primary winding of a transformer in a primary circuit, to provide energy to an LC tank circuit. The sinusoidal, AC tank voltage is impressed upon an output winding that feeds an output smoothing inductor through a full wave rectifier. The resultant direct current output is made availabe to a load. A unidirectional switch operates in response to a switch control to perform the switching in the primary circuit at near zero current conditions. The switch control opens the unidirectional switch to end the current pulse. The length of the current pulse is proportional to the magnitude of the load.

Abstract: A resonant power converter is disclosed which is constructed on an integrated magnetic core, with primary, secondary and tertiary windings occupying separate legs of the core. The tertiary winding is connected in a resonant circuit and induces a flux in the primary leg that causes the primary winding current to assume the shape of a series of generally sinusoidal pulses. Primary winding switching can thus occur at zero primary current between pulses, thereby eliminating prior interference problems. Furthermore, the converter can be operated in a pulse width modulated mode to accommodate for varying output load levels without the problems of low frequency operation encountered by prior frequency modulated resonant converters.