Abstract: Technologies for controlling AC-to-DC converters are disclosed. In one illustrative embodiment, a controller of an AC-to-DC converter measures two voltage levels of a split voltage bus of a power factor correction (PFC) circuit. The controller controls current drawn from the positive and negative terminals of the PFC circuit by a DC-to-DC converter. By controlling the current drawn from the two terminals, the controller can control the voltages on the terminals to be equal (but opposite).

Abstract: Technologies for controlling AC-to-DC converters are disclosed. In one illustrative embodiment, a controller of an AC-to-DC converter measures two voltage levels of a split voltage bus of a power factor correction (PFC) circuit. The controller controls current drawn from the positive and negative terminals of the PFC circuit by a DC-to-DC converter. By controlling the current drawn from the two terminals, the controller can control the voltages on the terminals to be equal (but opposite).

Abstract: A lighting driver (300, 400) for driving at least one lighting device (120) includes a control unit (310, 410) disposed on a first side of an electrical isolation barrier (320, 420), and a power supply unit (350, 450) disposed on a second side of the electrical isolation barrier so as to be electrically isolated from the control unit. The control unit supplies a single enable signal (302, 402) across the electrical isolation barrier to the power supply unit. The power supply unit includes a switching circuit (S1/S2) configured to selectively enable and disable, in response to the single enable signal, two output voltages for supplying power to an external device (130) which communicates data with the lighting driver.

Abstract: A lighting driver (300, 400) for driving at least one lighting device (120) includes a control unit (310, 410) disposed on a first side of an electrical isolation barrier (320, 420), and a power supply unit (350, 450) disposed on a second side of the electrical isolation barrier so as to be electrically isolated from the control unit. The control unit supplies a single enable signal (302, 402) across the electrical isolation barrier to the power supply unit. The power supply unit includes a switching circuit (S1/S2) configured to selectively enable and disable, in response to the single enable signal, two output voltages for supplying power to an external device (130) which communicates data with the lighting driver.

Abstract: An apparatus (400A, 400B, 400C, 400D, 500A, 500B, 800) supplies power to an output thereof. The apparatus includes: an isolation transformer (110) and a rectifier (120). The isolation transformer has a parasitic capacitance (Cp) between one of its input terminals (1S/1F) and one of its output terminals (2S/2F). The rectifier has a pair of input terminals connected to the output terminals of the isolation transformer, and a pair of output terminals connected across the apparatus' output. The rectifier includes a plurality of diodes (D1/D2/D3/D4) connected in a bridge. The apparatus also includes a compensation device for compensating for an increase in an output voltage across the output of the apparatus due to a charge pump effect of the parasitic capacitance. The compensation device includes at least one compensation capacitor (410, 510/520, 810/812) connected across one of the diodes of the bridge.

Abstract: An apparatus (400A, 400B, 400C, 400D, 500A, 500B, 800) supplies power to an output thereof. The apparatus includes: an isolation transformer (110) and a rectifier (120). The isolation transformer has a parasitic capacitance (Cp) between one of its input terminals (1S/1F) and one of its output terminals (2S/2F). The rectifier has a pair of input terminals connected to the output plurality of diodes (D1/D2/D3/D4) connected in a bridge. The apparatus also includes a compensation device for compensating for an increase in an output voltage across the output of the apparatus due to a charge pump effect of the parasitic capacitance. The compensation device includes at least one compensation capacitor (410, 510/520, 810/812) connected across one of the diodes of the bridge.

Abstract: A dimmer interface (110, 300) for a dimmable lighting driver (100) for a lighting unit (20) includes: a pulse width modulator (320, 420, 500) configured to generate a pulse width modulated signal (V2) from a dimming control input (Vdim), where the dimming control input (Vdim) is variable to adjust the brightness of the lighting unit (20); a low-pass filter (444) configured to output a dimming control voltage (Vo); and an optocoupler (330, 4300 configured to galvanically couple the pulse width modulated signal (V2) from an output of the pulse width modulator (320, 420, 500) to an input of the low-pass filter (444).